US2374868A - Electric switch - Google Patents

Description

May 1, 1945. A. w. KRIEGER 2,374,868

ELECTRIC SWITCH Filed May 26, 1943 2 Sheets-Sheet l VllY191945.` l A.W.KRIEGER 2,374,868

ELECTRIC SWITCH -Filed May 26, 1943 2 Sheets-Sheet 2 man; 71/ la Patented May l, 1945 .asusta oFFIcE ELECTRIC SWITCH Alvin W. Krieger, Milwaukee, Wis., assignorl to Cutler-Hammer, Inc.. Mllwaukeavwis., a corporation of Delaware Application May Z6, 1943, Serial No. 488,489

Claims.

This invention relates to improvements in electric switches, and more particularly to electric snap switches of the multiple circuit controlling type. l

A primary object of the invention is to improve and simplify the construction and assembly of the parts and the operation of switches of the aforementioned character.

Another object is to provide such a switch which is extremely compact in construction yet rugged and absolutely reliable in operation.

Another object is to provide a multiple circuit controlling switch enabling use of the required or desired number of switch units of identical form.

. Another object is to provide a switch of the aforementioned character wherein one or more of the switch units may readily be rendered of the momentary contact type.

Another object is to provide such a. switch wherein a single manually oscillatable lever is lemployed to effect and control operation of the several switch units.

- Another object is to provide novel and simple means for insuring against operation of more than one switch unit at a time.

Another object is to provide novel means for guiding and controlling the movementsof the single manually oscillatable lever of the switch.

Another object vis to provide novel means to facilitate bottom wiring of the complete switch.

Another object is to provide a combined contactor supporting and actuating unit, including novel means'for facilitating attachment of a circuit wire.

Another object is to provide a novel'form of pivotal support for the single manually operabl lever of the switch.

Another object is to provide a circuit controlling switch unit of novel form ,whereby wiping or sliding movement of the contactor with respect is susceptible of embodiment in other forms within the scope of the appended claims.

In the drawings',

Figure 1 is a top plan View of a multiple circuit controlling snap switch constructed in accordance with my invention; the single manually operable lever being shown in its intermediate, or om position.

Fig. 2 is a bottom plan view of the switch shown in Fig. 1, illustrating the form and arrangement of the bottom wiring terminals.

Fig. 3 is a longitudinal sectional view, on the line 3-3 of Fig. 1,1ooking in the direction of the arrows; certain of the switching elements being shown in elevation.

Fig. 4 is a secuonn view substantially like that of Fig. 3, but with the manually oscillatable lever to its contact is insured during both breaking and.

making oi' the circuitl controlled thereby.

Another object is to provide a novel form of insulating base and novel means for retaining the switch units in assembled relationship thereto.

. Another object is to provide novel means for facilitating attachment of the switch as a whole to a suitable support.

Other objects and advantages of the invention will hereinafter appear.

in one of its extreme positions, with consequent 'positioning of the contacter of one switch unit in circuit completing position.

Fig. 5 is a top plan view of the switch, with the metal cover plate and operating lever and the insulating spacer member removed.

Fig. 6 is a longitudinal sectional view, on the line 6-5 of Fig. l, looking in the direction of the arrows; all of the switch parts, including the manually oscillatable operating lever, being shown in ofi position, and a slightly modified form of said lever being illustrated.

Fig. 'I is a View substantially similar to that of Fig. 5, but modiiied by omission of the coiled tcrf sion springs associated with two of the switch units, and

Fig. 8 is a fragmentary sectional view, on the line 8-8 of Fig. 5, illustrating the manner of assembling the torsion springs with respect tp certain of the switch unitsv and the common insulating base or housing of the multiple circuit controlling'switch.

Referring first to the device of Figs. 1 'to 6 and 8, the numeral I0 designates a molded insulating base which is provided with an upwardly opening main recess II (see Fig. 5), a pair of opposed auxiliary recesses I2 and I3, and a third auxiliary recess I4; all of said auxiliary recesses communieating with said main recess Il and opening to the upper surface of base I0.

The accompanying drawings illustrate certain embodiments of the invention which will now be described, it being understood that the invention The switch illustrated is adapted to provide i'or completion of any one of three different circuits selectively, and to insure against completion of two or more of said circuits at the same time. Accordingly I prefer to provide in the bottom wall of the main recess II a substantially square subrecess or depression I5 (Figs. 3 and 4) which is adapted to snugly receive the correspondingly shaped lower end` of a block I5 of metal of good electrical conductivity, such as brass. Block I6 is provided with a reduced lower end I1 of cylindrical contour, and the bottom wall of base I 0 is provided with a passage I8 of circular cross sec-v tion to accommodate end I1; the lower suriacev of said bottom wall of the -base being provided with a'substanti'ally circular boss I8 to aiiord added thickness, as shown in Figs. 3 and 4. Block I8 is provided at its upper end with a relatively wide and relatively deep drilled countersink 28 (Fig. 4) to reduce the mass or weight thereof and to facilitate spot-welding of the contact tips to the outer surfaces thereof, as hereinafter described; and the end I1 is provided with a relatively small and relatively shallow drilled countersink I9 to restrain said plate against rotation relatively to the boss. Plate 25 is perforated to accommodate the. cylindrical end I1 of member I8, and the countersunkportion of' said end is spun or upset over an annular oilset .portion of said plate. as shown in Fig. 4, to rigidly and permanently secure said parts to each other and to base I0. As willbe understood, plate serves as a common terminal for each of the three snap switch units or mechanisms herein employed. The multiple circuit controlling switch herein disclosed is preferably of relatively high current controlling capacity, andI accordingly provide upon the three sides of member I8 respectively ""tobase I8, the lower end of slot 33 being shown I4, so that said end projects a predetermined distance below the lower surface of base I8.

Recess I4 is slightly enlarged at its upper end. as shown at 3l in Figs. 5 and 6; said enlargement including opposed vertical slot formations 32 and 3 3 (F. ig. 5) which arerespectively adapted to accommodate a pair of laterally extending lugs 34 and 35 formed integrally with' said main body portion 28 and coplanar with the latter. Lugs 34 and 35 are adapted to seat against the lowerlfends of slots 32 and 33 to limit the degree of downward movement of portion 32 relatively atV in Fig. 6. The arrangement is preferably opposite to the auxiliary recesses I2, I3 and I4 three like contact tips 26 which are' preferably formed from a composition the main ingredient of which is silver. As shown in Figs. 5 and 6 a rib 21 is formed integrally with the bottom and "bel-ls.

'I'he snap switch mechanisms positioned within the opposed auxiliary recesses I2 and I3 are shown as identical with each other. whereas the mechanism within auxiliary recess I4 .is substantially like the other two, except that a relatively shorter main pivot pin is employed due to the limited space available, with consequent omission of the coiled torsion spring. c

The snap switch mechanism positioned within recess I4 will be described: it being understood that like parts of each switch mechanism have been designated by like numerals of reference. Thus each mechanism includes a one-piece punched and stamped sheet metal member com` posed of highly conductive material.- such as f brass. The relatively long, flat main body portion of-said member is designated -by the numeral 28, the lower end thereof preferably 'having a such lthat the upper end 31 of .prtion 28 (see Fig. 6) is located substantially'fiush with the upper end of base I8. Also formed integrally with and extending laterally fromportion 28, at the upper end thereofjare a pair of perforated lugs 38 and 38 (Figs. 5 and 6), said vlugs being bent inwardly atl substantially right angles to portion 28 into approximately parallel relationship to each other.

The perforations in lugs 38 and 38 are adapted to freely receive a main (pivot pin 40, the opposite ends of which are preferably located in planes substantially iiush with the outer surfaces of the respective lugs'. Pin 48 penetrates a bearing opening of corresponding size formed in a molded insulating actuating lever 4I, said lever having molded therein a dat, punched metal member 42 (Fig. 6) having a. bearing opening 43 formed therein to likewise accommodate said pin and to reinforce the bearing opening in said lever. Member 42 has an integral portion extending downwardly from lever 4I, said portion being provided with a rounded head 44 (Fig. 6) which is adapted to act as an abutment for a metal cup 45the convex portion of which is adapted to project into the upper end of a coiled compression spring 46,'and the ilange of which cup is adapted to seat against the nat upper end of said spring.

Pin 40 is adapted to be positioned between the opposed vertical side walls of recess I4 and is restrained against substantial endwise movement by said walls. Lever 4II is provided with a second bearing opening above that aforedescribed, the metal insert 42 having an openingof corresponding size. designated by numeral 41 in Fig. 6, to accommodate an auxiliary pivot pin 48 the ends of which are positioned between the inner surfaces of the aforementioned lugs 38 and 39 to prevent substantial endwise displacement of pin 48.

49 designatesjthe contactor which is punched and stamped to the form illustrated from sheet metal of good conductivity. such as brass. The lower end portion of contactar 48 is of substantially channel-form in transverse cross section,

the at connecting portion 50 having a. tip 26.

spot-welded, brazed or otherwise rigidly attached to the surface thereof which faces the ycontact tip 26 attached to thecorresponding surface of block I6. The upper end of connecting .portion 58 is formed as illustrated at 5I to form an.

abutment for the fiat lower end of spring 46.Vv The sides of the channel-shaped portion of said contactor 48 are extendedupwardly in the forni of 'arms 52 and 53 (see Fig. 8) which are flared ing hook-shaped upper ends 54 and 55 which are respectively adapted to seat against the opposite ends of pin 48.

By reason of the aforementioned flare of amis vslightly relatively to each other, said arms havlclearance between said parts. f As best illustrated in Fig. B'member 2l is prefi ferably provided withan integral portion I9 which 2,874,868 ends of the same are adapted for a predetermined "degreeof frictional engagement with the inner surfacesof lugs 39 and 3l to insure good electrical Bushing is preferably provided with a convex f upper'eno wan 13mg. e) which is provided with engagement or contact between said parts. Neverthelessy such frictional engagement is not sumcient to substantially' interfere with the desired snap movementof contactor 49 from each extreme position thereof t the other under the y bias of spring 49.

Lever 4I is provided at its lupper end with a transversely extending upwardly opening notch yo r slot '59 of approximately V-form, to provide rar lost-motion'driving connection between an operating lever and said lever 4I. The portion 51 of lever 4I,at the inner side of notch 59, is preferably of slightly greaterwidth than the distance tance between the hooked end portions I4 and 55 of contactor arms 52 and 53, to provide oscillatory movement of lever 4| which effects snap movement of contactor 49 to its circuit interrupting position illustrated.

The aforementioned operating` lever is preferably of the special form designated in general by the numeral 99 in Figs. l, 3 and 4 and by the numeral 9| in Fig. 6. The lever 9| is provided at its upper end with a cylindrical recess I2 to accommodate a brous pad and a hollow hemispherical glass lens 94 the inner surface of which is provided with a layer or coating 94x of fluorescent or luminescent material, as desired. The' peripheral wall of recess I2 is spun inwardly over aportion of lens 94 to retain the latter in-assembled position. Levers 80 and 8| are in other respects substantially identical with each other and corresponding parts thereof have been desishated by like numerals ofreference. r I'hus each lever 60 and Il is provided with an approximately spherical intermediate enlargement l5 which is provided with a relatively large transverse opening or passage 8l which is adapt- `.ed tofreely receive a substantially cylindrical metal member or shaft 81 which provides a supportabout which the lever is adapted to oscilylate. As show n in Fig. 6 the flat ends of member 91 are arranged in flush-relationship to the cprposite ends of opening 89. Said enlargement l5 v is located within ahollowmetal bushing I8. which is rigidly and non-rotatably secured to a substanan, abutment` to limit the degree vof oscillatory tially flat metalcoverplatef. Thus plate il is provided with a circular opening to receive the reduced lower end of bushing 4l, said end being spun or upset outwardly over the inner surface of said plate, as shown at 1l, to permanently secure said parts to each other. In practicesaid reduced lower end of bushing 99 is provided with Vla diametrically ,opposed pair ofkerfs orl slots into which a pair of lugs 1| and 12, partially sheared from and upwardly offsetwith respect to plate 89, 'are respectively adapted to nt, as .shown in vented.

ing Il relatively to plate 99 is positively prea pair of opposed slots 14 and 1l, and a slot 1l extending in a direction at rightv angles to the other slots. All of the slots 14, 1l and 1l communicate with each other. and the same act jointly at the area common thereto to provide an opening of a size to permit free insertion of the handle 90 or 6I upwardly therethrough, as illustratedinFig. 1.

Plate I9 is preferably of the six-sided shape thereof illustrated in Fig. 1l, and bushing Il is rigidly and non-rotatably attached thereto in the-relationship illustrated in said ligure. Plate il is so shaped to conform to the contour of the upper end of base I0 and of the molded insulating spacer member 11 interposed between the latter and plate 99.

As best illustrated in Figs. 3 and 4, bushing Il isl provided with diametrically opposed openings 18 and 19 with countersinks to respectively accommodate the head and upset endof a pin I9 which acts as a pivotal support for member l1; the latter having an opening 8| extending diametrically therethrough to freely accommodate said pin. Also as shown' in Figs. 3 and 4, the lever enlargement Il is provided with diametrically opposed kerfs l2 and 8l of arcuate form which communicate with the aforementioned opening Il in said enlargement, and thus provide clearance between pin Il and lever 99 or Il upon oscillation of the latter in the plane of the axis or' length of said The lower end portion 84 of lever 80 (or 9|) is provided with a reduced extension 85, two sides of which are fiatted, as shown at 86 and 81; a punched and stampedbsheet metal member 98 having an opening (see Figs. 3, 4 andG) to nonrotatably iit around said extension; and the lower end of extension being upset or riveted over the lower face of member 98 to rigidly and permanently secure said parts to each other, as

shown at I9. Member 88 is provided with three integral arms, the outer end portions of which cone-shape is interposed between said member and the lower surface of plate 99. The purpose of spring 93 is to insure against vibration or rattling of lever B and to bias the same to its intermediate or neutral position (shown in Figs. 1, 3 and-6) when all of the switch'units are in Atheir circuit-interrupting positions. Spring 93 thus acts, along with the several switch units, to insure such neutral positioning of lever Il.' under the condition aforementioned, regardless of the angle at which the switch as a whole is supported.

. The base lo has lmeloen therein Yand projecting upwardly therefrom adjacent the four main corners thereof the hollow internally threaded lmembers 94 formed of a suitable metal, such as brass. The `hollow molded insulating spacer member 11 has passages (not shown) extending therethrough to accommodate members 94, the upper Vends of which likewise penetrate alined openings in plate Gland are spun or upset outwardly over the latter, as shown at 94, to rigidly and permanently secure plate $9, -spacer 11 and base Il to each other.

As best illustrated in Fig. 1 the tapped upper other of its three extreme positions).

end' 1mi-tites siii of'. members' si are adapted 'to accommdate.- the v'sh'anks oiscrews (not shown) in a switch like that mustrated in rig. 'z wherein to provide for attachment o! .the switch asa whole toapan'el orother suitable support.

As lshown in Figs. 5 andl`6-I prefer to interpose 1 "between/the rear surface of themember 28, within'recess Il, anditheopposed face of the slot-v forming recess 3l at the upper end of base I0 lbled relationship to, base- I; as best-illustrated in' Figs. 3, 4 and s.

`The Aswitch. positioned' within auxiliary Ilarial l3 preferably are substantially jlikethat within'v recess Il, and the correspond-i ing parts of vall-oisaid units lare thereforedesigf nated by'like numerals .of reference. As best illustrated in Fig'. 5, however, the units ,within recesses Il 'and I3 are each provided with amain j pivot pin 86 of substantially greater length than' the main pivotv pin 40 aforedescribed; the recesses:

'I2 andIs being. accordingly'provided with upwardlyopening pairs' of .opposed slots I2'-, 12b

and I Il, I Sb to accommodate the respective oppositejendswof pins 96. The extra length of P1115 Seis utilizedto provide for association with each "oftheftwo switch units a coiled torsion spring `91,eacli'spring`9`| comprising a pair of coiled.v portionse'l! and 81h surrounding the en ds of the respective pin 98; a'connecting portion 91 positioned .atjthe outer suri'aceof the pox-tion` v51 of therespective actuating lever 4I and located be low the integral laterally extending-lugs on said vportion Il, as best illustrated in Fig. 6. vTh'efree f ends 91d and `91 ofl the respective coils S'Iand 915 of -said torsion springs. are relatively long and'stralght with slightlyettips, best illus-A trated in Fig. 3; upwardly vopeningrecesses being provided in base I0 `tuaccommodate said coiled portions and the free ends thereof, vas, best illustrated in Figs. 5 and 7. It willbe understood that when saidswitch units-are inserted intosrecesses I2and Il with their associated torsion springs 91 in assembledrelationship thereto, said springs lall of th'e switch units are of the non-momentary .type in lboth their circuit completing and circuit `interrupting conditions, a similar result might be obtained by using switch units in recesses I2 and I3 vcompletely identical with that in' recess Il; providedv that suitable blocks of insulating mate- Vrial orthe like are employed to iill the recesses which accommodate the relatively long pivot pins 96; or the insulating base I0 might be provided i with auxiliary recesses corresponding to the' recesses I2 and I3, but of a form identical with the auxiliary recess Il.

. As aforeindicated, the arrangement of the auxiliary pivot pin 48 of each switch unit in eccentric vvore1atiim`-s'hip to the main pivot pin of lever 4I 'insures alifting or sliding action o! each conas .portions of theswitchlunits'within the recesses I 2 and I3, to retain said units in properly assemtactor. tip with respect to'the tip of its associatedstationary contact prior to snap movement of the f :In Fie vided at its perforated Vlower end with a bolt or contactor toits disengaged position. ,The prying or-lifting effect tlius provided is important in respect of preventingor overcoming any tend- -ency toward sticking or freezing of the contactor.

3 I have shown each member 28 proscrew 88 .which is adapted to clamp-a circuit i wirev (no t shown) thereto; each screw having associated ytherewith la threaded nut $9, which in turn' carries a member IIlIl of ber or the like for cooperation with the screw shank to insure against accidental loosening thereof.

It rwill bezapparent to those skiuea in the srt 'fthatth'e' switch aforedescribed may be modified by omission of one or two ofthe switch units illustrated; in'whichrevent it is preferable to employ a bushing (corresponding to thatshown atti!) `but with thecorresponding one or two ofthe Vthree Slots N, 15 and -16 omitted, t0 1nsure proper guiding of the 'lever 60 or BI. Similarly, -it isA obvious that an insulating base sub- -statially like that shown at' I0 but of larger transverse dimensions might be employed to pro- `vide a fourth auxiliary recess exactly like that shown at Il, whereby a fourth switch unit might bel employed. With such an arrangement, a

metal lmember corresponding'to that shown'at 1 88 but with another arm and tip diametrically 'opposed tothe ltip 92 would vbe required, and a bushing having a fourth slot. opposite to the slot 1G would be employed.

' Other modifications of will actl to overpower. the coilediv compression l cult interruptingpositions (see Fig. 3). 11n re-v e Fig. 4, itiis of vcourse to be understood that the lever Buis being manually l e communicating therewith, a plurality o! stationi ary. contacts' carried by said base within said' mainlrecess, a corresponding number of oscillat- Thus in Fig. 7 I have shown both oi said units with said/torsion springs omitted; whereby each 0f the three Switch units is adapted tobe retained in either its circuit interrupting position (when lever l0- or il is in its intermediate or neutral position) or in its circuit completing position (when lever 80 is moved selectively to one or an- As will be apparent to those skilled in the the devices illustrated will. at once suggest themselves 'to those skilled `inthe art.

interrupting positi'on',

' i auxiliaryrecesses, each contactor being associated I-claim: Y

1..'In a multiple circuitfcontrolling switch, in

combination, af moldedinsulating base having a recess and a plurality of auxiliary recesses able'fcontactors mounted within the respective with one or said stationery contacts individually, actuating elements individual to the respective `contactors for effecting operation of the latter entirely independently of each other whereby the same `are adapted for movement selectively into and out of engagement with'the individual stationary contacts respectively associated therewith, common operating means for said contactors, said means comprising afmanually oscillatable lever adapted upon movement from one extreme position thereof to another to transiently engage directly the actuating elements of two ot associated stationary contact and subsequent engagement of another of said contactcrs with its associated stationary contact, said lever being'Y also adapted upon movement thereof to an intermediate position to insure disengagement of all of said contactors from their associated stationary contacts, and means including coiled compression springs individual to the respective actuating elements and contactcrs for eiecting s'uch movements of the latter with a snap action.

2. In a multiple circuit controlling switch, in combination, a molded insulating base having a main recess and a plurality of auxiliary recesses communicating therewith, a plurality of stationary contacts carried by said base within said main recess, a corresponding number of oscillatable contactcrs mounted within the respective auxil` lary recesses, each contactor being associated with one of said contacts individually, actuating elements individual to the respective contactcrs for i eil'e'cting operation of the latter entirely independently of each other whereby the same are adapted for movement selectively into and out of engagement with the individual stationary contacts respectively associated therewith, common operating means for said contactcrs, said means comprising a manually oscillatable lever adapted upon movement in a single piane from one extreme position thereof to another to transsiently engage directly the actuating elements of two of said contactcrs in sequence to thereby enact disengagement of one of said contactcrs from its associated stationary contact and sub sequent engagement of another of said contactcrs with its associated stationary contact, said lever being also adapted upon movement thereof to an intermediate position tc insure disengagement of all of said contactcrs from their associated stationary contacts, means including coiled compression springs lndividual 'to the respective actuating elementsand contactcrs for electing such movements of the latter with a snap action, and said oscillatable lever being also movable in a different .plane from said intermediate position to a third extreme position to effect engagement of another oi said contactcrs with its associated stationary contact, said last mentioned contacter also having a coiled compression spring interposed between the same and the actuating element associated therewith to insure engaging and disengaging movements thereof with a snap action.

3. In a multiple circuit controlling switch, in combination, a molded insulating base having a main recess and a plurality of auxiliary recesses communicating therewith, a plurality of stationary contacts carried by said base within said main recess, a corresponding number of oscillatable contactcrs mounted within the respective auxiliary recesses, each contacter being associated with one oi' said stationary contacts individually, actuating elements individual to the respective contactors for electing operation of the latter entirely independently of each other whereby the same are adapted for movement selectively into and out of engagement with the individual stationary contacts respectively associated therewith, common operating means for said contactcrs, said means comprising a single manually oscillatable lever adapted upon movement from one extreme position thereof to another to transiently engage directly the actuating elements of two of said contactors in sequence yto thereby effect disengagement of one of said contactcrs from its associated stationary contact and subsequent engagement of another of said contactors with its associated stationary contact, said member being also adapted upon movement y thereof to an intermediate position to insure disengagement of all of said contactcrs from their associated stationary contacts, means including coiled compression springs individual to the respective actuating elements and contactors for effecting such move-I ments of the latter with a snap action, said oscillatable lever being also movable in a different plane from sai ,intermediate position to a third extreme posit'o to effect engagement of another of said contactors with its associated stationary contact, said last mentioned contactor also having a coiled compression spring interposed between the same and the actuating element associated therewith to insure engaging and disengaging movements thereof with a snap action, and a wiring terminal element common to all of said stationary contacts.

4. In a multiple circuit controlling switch, in combination, a molded insulating base having a main recess and a plurality of auxiliary recesses communicating therewith, a plurality of stationary contacts carried by said base within said main recess, a corresponding number of oscillatable contactcrs mounted within the respective auxiliary recesses, each contacter being associated with one of said stationary contacts individually, actuating elements individual to the respective contactcrs for eiecting operation of the latter entirely independently of each other whereby the same are adapted for movement selectively vinto and out of engagement with the individual stationary contacts respectively associated therewith, common operating means for said contactcrs, said means comprising a single manually oscillatable lever adapted upon movement from one extreme position thereof to another to transiently engage directly the actuating elements of two of said contactcrs in sequence to thereby eiect disengagement of one of said contactcrs from its associated stationary contact and subsequent engagement of another' of said contactcrs with its associated stationary contact, said lever being also adapted upon movement thereof to an intermediate position to insure disengagement of all of said-contactcrs from their associated stationary contacts, means including coiled compression springs individual to the respective actuating elements and contactcrs I'or effecting such movements of the latter with a snap action, said oscillatable lever being also movable in a diierent plane from said intermediate position to a third extreme position to eiect engage- ',ment of another of said contactcrs with its associated stationary contact, said last mentioned contacter also having a coiled compression spring interposed between the same and the actuating element associated therewith to insure engagingr land disengagng movements thereof with a snap action, a wiring terminal element common to all of said stationary contacts, and wiring terminal elements individual to the respective contactcrs, all of said wiring terminal elements being exposed and readily accessible at the outer surface of said insulating base.

5. In an electric snap switch mechanism, in combination, a molded insulating base having a main recess and a plurality of auxiliary recesses communicating therewith, a plurality of stationary contacts mounted upon said base within said main recess, a corresponding number of contactcrs pivotally supported relatively to said base tively associated therewith, a. manually operable lever pivotally supported in a manner to provide for oscillatory movement thereof in any direction relatively to said base, said last mentioned lever having means rigidly attached thereto and adapted for cooperative lost motion engagement with each of said actuating levers individually upon oscillatory movement of said operating lever in diierent predetermined directions selectively from an intermediate position thereof, and guide means associated with said operating lever to limit the same to forward and return movement in any one of said predetermined directions prior to oscillatory movement thereof in another of said directions, whereby simultaneous operation of two or more of said contactors is positively prevented.

6. In an electric snap switch mechanism, in

" combination, a molded insulating base having a,

main recess and a plurality of auxiliary recesses communicating therewith, a plurality of station ary contacts mounted'upon said base within said main recess, a corresponding number of contactors pivotally supported relatively to said base within the respective auxiliary recesses, a pivoted actuating lever and a coiled compression spring individual to each contactor to provide for snap movement of the latter into and out of yengagement with the stationary contact respectively as sociated therewith, a manually operable lever pivotally supported in a manner to provide for oscillatory movement thereof in -any direction relatively to said base, said last mentioned lever having means rigidly attached thereto and adapted for cooperative lost motion engagement with each of said actuating levers individually upon oscillatory movement of said operating lever in different predetermined directions selectively from an intermediate position thereof, guide means associated with said operating lever to limit the same to forward and return movement in any one of said predetermined directions prior to oscillatory movement thereof in another of said directions, whereby simultaneous operation,

of two or more of said contactors is positively prevented, and said operating lever when in its intermediate position providing for disengagement of all of said contactors from respectively associated therewith.

7. In an electric snap switch mechanism, in combination, ,a molded insulating base having a main recess and a plurality of auxiliary recesses communicating therewith, a plurality of stationary contacts mounted upon said base within said main recess, a corresponding number of contactors pivotally supported relatively to said base within the respective auxiliary recesses, a pivoted actuating lever and a coiled compression spring individual to each contacter to provide for snap movement of the latter into and out of n engagement with the stationary contact respectively associated therewith, a manually operable lever pivotally supported in a manner to providey for oscillatory movement thereof in any direction relatively to said base, said last mentioned lever` having means rigidly attached thereto and adapted for cooperative lost motion engagement with each of said' actuating levers individually upon oscillatory movement of said operating lever in at least three different predetermined 'directhe contacts additional spring means associated with at least another of said directions, whereby simultaneous operation of two or more of ksaid contactors is positively prevented, said operating lever when in its intermediate positionproviding for disengagement of all of said contactors from the contacts respectively associated therewith, each of said coiled compression springs normally acting respectively upon movement of said operating lever in a given direction -to one extreme position thereof to `effect retention of the latter in such position and engagement of its associated contactor with its respective stationary contact, and

one of said actuating levers and adapted to overpower the respective compression spring to thereby bias its associated contacter to disengaged position and permit return of said operating lever to its intermediate position upon manual release of the latter.

8. In an electric switch, in combination, a metal cover plate having an opening formed therein, a hollow metal bushing having a reduced lower end projecting downwardly through said opening and upset over the lower surface of said plate in a manner to rigidly and non-rotatably secure the former to the latter, the upper end of said bushing being partiallyl .closed but the same having a multiplicity of slots formed therein and extending radially from the 'center thereof, a lever the upper end portion of which is freely insertable upwardly through the central portion of the opening formed by said slots jointly, each of said slots being of a size to provide clearance for said portion of said lever to guide and limit the same to oscillatory movement in a given plane, said lever having an enlargement adapted to movably fit within said bushing below said upper end of the latter, said enlargement having a relatively large transverse opening formed therein,

through said last mentioned opening and supported at its opposite ends by said bushing, said cut away portions of said enlargement affording clearance for said lever upon oscillation of the latter in a plane parallel to the axis ofA said pivot 9. In an electric switch, in combination, a metal cover plate having an opening formed therein, a hollow metal' bushing having a reduced lower end projecting downwardly through said opening and upset over the lower surface of said plate in a manner to rigidly and non-rotatably secure the former to the latter, the upper end of said bushing being partially closed but the same having a multiplicity of slots formed therein and extending radially from the center thereof, a lever the upper end portion of which is freely insertable upwardly through the central portion of the opening formed by said slots jointly, each of said slots being of a size to provide clearance for said portion of said lever to guide and limit the same to oscillatory movement in a given plane, said lever having an enlargement adapted to movably lt within said bushing below said upper end o! the latter, said enlargement havinga relatively large transverse opening of circular cross section 'formed therein, a substantially cylindrical metal member freely rotatable within said opening. said metal memberv having a relatively small opening extending diametrically therethrough, said lever enlargement being cut away on opposite sides thereof at right angles to said opening therein to afford accss to said opening-in said metal member, and a pivot pin i'freely insertable through said last mentioned opening and supported at its opposite ends by said bushing, said cut away portions of said enlargement affording clearance for said lever upon oscillation of the latter in any plane.

10. In an electric switch, in combination, a metal cover plate having an opening formed therein, a hollow metal bushing having a reduced lower end projecting downwardly through said opening and upset over the lower surface of said plate in a manner to rigidly and non-rotatably secure the former to the latter, the upper end of said bushing being partially closed but the saine having a multiplicity of slots formed therein and extending radially from the center thereof, a lever the upper end portion of which is freely insertable upwardly through the central portion of the opening formed by said slots joint being of a size to provide clear e for said portion of said lever to guide and it the same to oscillatory movement in a given plane, said lever having an enlargement adapted Ato movably :dt

, each of said slots within said bushing below .said upper end of the latter', said enlargement having a relatively large transverse opening of circular cross section formed therein, a substantially cylindrical metal member freely rotatable within said opening,'said metal member having a relatively small opening extending diametrically therethrough, said lever enlargement being cut away on opposite sides thereof at right angles to said opening therein to aord access to said opening in said metal member, and a pivot pin positioned within said last mentioned opening and supported at its opposite ends `by said bushing, said metal member and said cut away portions of said enlargement cooperating with said pivot pin to afford universal movement of said lever relatively to said bushing except as limited by the aforementioned slots.

ll. In a device of the character described, in combinatiom a hollow metal bushing, a metal lever having a substantially spherical enlargement intermediate the ends thereof adapted to oscillatably fit within said bushing, said enlargement having a relatively large circular opening extending diametrically therethrough, a pair of opposed arcuate keris formed in said enlargement in a plane at right angles to the axis of said opening and communicating with the latter, a substantially cylindrical metal member positioned within said opening and adapted to form a pivotal support for said lever, said member having a relatively small circular opening extending diametrically therethrough at the mid-length thereof, said bushing having diametrically opposed openings formed therein, anda pivot pin penetrating said last mentioned openings and said metal member formed at the lower end thereof to provide i'or attachment of a circuit wire, a pair of perforated lugs formed integrally with said member at the upper end thereof, said lugs being bent inwardly at substantially right angles to the main body of said member, a molded insulating actuating lever having a substantially circular passage extending transversely therethrough, a

, pivot pin positioned within said passage and havextending transversely therethrough, a pivot pin relatively small opening, to thereby provide a pivotal support forsaid metal member and to act as an alternative pivotal support for said lever, the aforementioned kerfs formed in said enlargement being adapted to accommodate said pivot pin and to provide clearance between the latter and said lever.

12. In an electric snap switch, a punched sheet ing bearing engagement with the perforations in said lugs, said lever being formed at the upper end thereof to provide for cooperative engagement therewith of a suitable operating member, said lever having an abutment at the lower end thereof, said' lever also having a second substantially circular passage extending transversely therethrough above the passage rst mentioned, a second pivot pin positioned within the second mentioned passage. the ends of said second pin being located between said lugs and restrained by the latter against substantial endwise displacement, an. oscillatable contacter comprising a sheet metal member having a pair of dat substantially parallel side arms, the upper ends of said arms being hook-shaped for pivotal engagement thereof with said second pin, said contacter having a portion integrally connecting said arms below the upper ends thereof, an abutment formed on said contacter, and a coiled spring interposed under compression between said last mentioned abutment and said lever abutment to bias said contractor to one extreme position or the other ac- `cording to the position of said lever.

inwardly at substantially right angles to the mainbody of said member, a molded insulating actuating lever having a substantially circular passage positioned within said passage and having bearing engagement with the perforations in said lugs, said lever hein-g formedat the upper end thereof to provide for cooperative engagement therewith of a suitable operating member, said lever having an abutment at the lower end thereof, said lever also having a second substantially circular passage extendin'g transversely therethrough above the passage iirst mentioned, a second pivot pin positioned Within the second mentioned passage, the ends of said second pin being located between said lugs and restrained by the latter against substantial endwise displacement, an oscillatable contactor comprising a sheet metal member having a pair of fiat substantially parallel side arms, the upper ends of said arms being hook-shaped for pivotal engagement thereof with said second pin, said contacter having a portion integrally connecting said arms below the upper ends thereof, an abutment formed on said contactor, and a coiled spring interposed under compression between said last mentioned abutment and said lever abutment to bias said contactor to one extreme position or the other according to the position of said lever, the arms of said contactor having a predetermined degree of frictional engagernent with the inner surfaces of the respective lugs, to thereby insure a good electrical con- Y passage, the ends of sides of` portion having an opening end of said body portion,

portion havingan opening formed therein to facilitate attachment of a circuit wire, a pair-of perforated lugs formed lintegrally with the upper end of said body portion, saidlugs being bent inwardly into substantially parallel relationship to each other, a molded insulating actuating lever having a pair of upper and lower substantially l circular passages-extending transversely therethrough, a pivotpin positioned within the lower said pin having bearing engagement with the perforations in said lugs, a relatively shorter pivot pin positioned within the upper passage, the ends of said shorter pin being located between said lugs and restrained by the latter against substantial endwise displacement, a punched and stamped sheet metal contactor the lower end portion of which is of approximately channel-shape in transverse cross section, the said channel being extended upwardly to provide substantially parallel arms with hookshaped upper ends for pivotal engagement with the ends of said second pin, an abutment formed at the upper end of said channel portion, and a coiled compression spring interposed between said last mentioned abutment and said lever abutment to bias said contacter to move with a snap action from each extreme position thereof to the other upon corresponding movements vof said actuating lever.'

15. In an electric snap switch, a punched and stamped sheet metal member having a relatively long, fiat body portion, the lower end of said body formed therein to facilitate attachment ofA a circuit wire, a pair of perforated lugs formed integrally with the upper said lugs being bent inwardly into substantially parallel relationship to each other, a molded insulating actuating lever 1 having a pair of upper and lower substantially circular passages extending transversely therethrough, a pivot pin positioned within the lower passage, the ends of said pin having bearing engagement with the perforations in said lugs, a relatively shorter'pivot pin positioned within the upper passage, the ends of said shorter pin being located between said lugs and restrained by the.

through, aI pivot pin positioned within the lower passage, the ends of said pin having bearing engagement with the perforations in said lugs, a relatively shorter pivot pin positioned within the upper passage, the ends of said shorter pin being located between said lugs and restrained by the latter against substantial endwise displacement, a

punched and stamped sheet metal contactor the lower end portion of which is of approximately ,channel-shape in transverse cross section, the sides of said channel being extended upwardly to provide substantially parallel arms with hookshaped upper ends for pivotal engagement with the ends of'said second pin, an abutment formed at the upper end of said channel portion, a coiled compression spring interposed'between said last mentioned abutment and said lever abutment to bias said contactor to move with a snap action from each extreme position thereof to the otherupon corresponding movements of saidv actuating lever, said actuating lever vhaving a flat sheet metal member molded therein as an insert, said insert having openings formed therein in alinement with said passages to provide for reinforcement of the walls of the latter with respect to said pivot pins, and a portion of said insert extending Y- downwardly a substantial distance beyond said lever to provide the aforementioned abutment on the latter.

having a pair of upper and lower substantially circular passages extending transversely therethrough, a' pivot pin positioned Within the lower passage, the ends of said pin having bearing engagement with the perforations in saidlugs, a

'relatively shorter pivot pin positioned within the latter against substantial endwise displacement, a Y.

punched and stamped sheet metalcontactor the end portion of which is of approximately channel-shape in transverse cross section, the sides of said channel being extended upwardly to provide substantially parallel arms with hookshaped upper ends for pivotal engagement` with the ends of said second pin, an abutment formed at the upper end of said channel portion, a coiled compression spring interposed between said last mentioned abutment and said lever abutment to bias said contactorto move with a snap action from each extreme position thereof to the other upon corresponding movements of said actuating' lever, andv said actuating lever having an upwardly upper passage, the ends of said shorter pin being located between said lugs and restrained by the latter againstsubstantial endwise displacement, a punched and stamped sheet metal contactor the lower end portion ofy which is of ap- ,proximately channel-shape in transverse cross ment `With opening notch formed therein for cooperative engagement therewith of an oscillatable operating lever of suitable form. t e

16. In an electric snap switch, a punched and stamped sheet metal member having a relatively long, nat body portion, the lower end of said body portion having an opening formed therein to facilitate attachment of a circuitwire, a' pair of perforated lugs formed integrally with the upper end o f said body portion, said lugs being bent inwardly into substantially parallel relationship to each other, a molded insulating actuating lever having a pair of upper and lower substantially circular passages extending transversely theresection, the sides of saidchannel being extended upwardly to provide-substantially parallel arms with hook-shaped upper ends for pivotal engage` the ends of said second pin, an abutment formed at the upper end of said channel portion, a coiled compression spring interposed between said lastmentioned abutment and said lever abutment to bias said contacter to move with a snap action from `each extreme position thereof to the other upon corresponding movem'ents of said actuating lever, said actuating lever having a at sheet metal member molded therein as an insert, said insert having openings formed therein in alinement with said passages to provide for reinforcement of the walls of the latter with respectto said pivot pins, a portion of said insert extending downwardly a substantial distance beyond said lever to provide thefaforementioned abutment on the latter, said contacenvases contact tip prior to disengagement of the former from the latter.

18. In an electric snap switch, a punched and stamped sheet metal member having a relatively long, at body portion. the lower end of said body portion having an opening formed therein to facilitate attachment of a circuit wire, a pair of perforated lugs formed integrally with the upper end of said body portion, said lugs being bent inwardly into substantially parailel relationshi to each other, a molded insulating actuatinf le. having a. pair of upper and lower substai. circular passages extending transversely ti through, a pivot pin positioned within the lower passage, the ends orsaid pin having bearing engagement with the perforations in said a relatively shorter pivot pin positioned upper passage, the ends `of said shorter p located between said lugs and restrained cy latter against substantial endwise displacement, a punched and stamped sheet niet-al contacter the lower end portion of which is or approxici a pair of perforated lugs bent inwardly into mately channel-shape in transverse cross section,

the sides of said channel being extended up wardly to provide substantially parallel arms with hook-shaped upper ends for pivotal engagement with the ends of said second pin, an abutment formed at the upper end of said channel portion, a coiled compression spring interposed between said last mentioned abutment and said lever abutment to bias said contactor to move with a snap action from each extreme position thereof to the other upon corresponding movements of said actuating lever, said actuating lever having a at sheet metal member molded therein as an insert, said insert'having openings formed therein in alinement with said passage to provide for reinforecement. of the walls of the latter with respect to said pivot pins, n ,portion of said insert extending downwardly a substantial distance beyond said lever to provide the aforementioned abutment on the latter, said contactor having a silver base tip rigidly attached to the lower end' portion thereof for cooperation with a stationary contact of suitable form, and said upper pivot pin being arcuately movable relatively'to said lower pin to insure a wiping or sliding action of said contacter tip relatively to the stationary contact as an incident to engagement or disengagement of the former with respect to the latter.

19. A multiple circuit controlling switch comprising a molded insulating base having a main recess opening to the upper surface thereof, a plurality of auxiliary recesses located at diierent sides of said main recess and communicating with the latter. a metal block secured to the lower surface of said main recess and having a contact area facing each of said auxiliary recesses, said block having a Wiring terminal portion exposed at the lower surface of said base, each of said auxiliary recesses having a substantially rectangular opening in the lower end wall thereof, a contacter supporting and actuating mechanism located within each of said auxiliary recesses, each mechanism comprising a punched and stamped sheet metal member of high electrical conductivity, said member having a relatively long, dat main body portion the perforated lower end of which is adapted to extend downwardly through the respective recess opening to provide for attachment of a circuit wire, said main body portion having coplanar lugs extending from opposite sides thereof and said base having ledges against which said lugs are adapted to seat, said main body portion having at the upper end theresubstantially parallel relationship to each other, a molded insulating actuating lever positioned etvfeen said perforated lugs, a pivot pin penesaid last mentioned lugs and said lever to pivotal support for the a con pivotally supported by said lever in eccentric relationship to pivotal support of the latter, and a coiled compression spring interposed between said iever Said contacter to effect ne respective conteo .ca 'i corresponding movements ci the iol., 3:.

circuit controlling switch prising ainolded insulating base having a l cesses, said bloclr having a wiring terminal portion exposed at the lower surface of said base, each of said auxiliary recesses having a substantially rectangular opening in the lower end wall thereof, a contacter supporting and actuating mechanism located within each of said auxiliary recesses, each mechanism comprising a punched and stamped sheet metal member of high electrical conductivity, said member having a relatively long, fiat main body portion the perforated lower end of which is adapted to extend downwardly through the respective recess opening to provide for attachment of a circuit wire, said main body portion having coplanar lugs 'extending from opposite sides thereof and said base Y having ledges against which said lugs are adapted to seat, said main body portion having at the upper end thereof a pair of perforated lugs bent inwardly into substantially parallel relationship to each other, a molded insulating 'actuating lever positioned between said perforated lugs, a pivot pin penetrating said last mentioned lugs and said lever to aiiord a pivotal support for the latter, a contactorpivotally supported by said lever in an eccentric relationship to said pivotal support of the latter, a coiled compression spring interposed between said levervand rsaid contactor to effect snap movements of the latter into and out of engagement with the respective contact area of said block upon corresponding movements of the former, each of said levers having'an upwardly opening notch formed therein, and a single manually operable lever pivotally supported relatively 4to said base for cooperative engagement with said rst mentioned levers selectively, said manually operable lever` having guide means associated therewith todnsure return of each of said first `mentioned levers to a given eX- treme position thereof prior to cooperative engagement of another of the same by said manually operable lever.

2l. A multiple circuit controlling switch comprising a molded insulating base having a main recess opening to the upper surface thereof, a plurality of auxiliary recesses located at different Y sides of said main recess and communicating with said block having a wiring terminal portion exposed at the lower surface of said base, each of said auxiliary recesses having a substantially rectangular opening in the lower-'end wall thereof, a contacter supporting and actuating mechanism located within each of said auxiliary recesses, each mechanism comprising a punched and stamped sheet metal member of high electrical conductivity, said member having a relatively long, flat main body portion the perforated lower end of which is adapted to extend downwardly through the respective recess opening to provide for attachment of a circuit wire, said main body portion having coplanar lugs extending from opposite sides thereof and said base having ledges against whichlsaid lugs are adapted to seat, said main body portion having at the upper end thereof a pair of perforated lugs bent inwardly into substantially parallel relationship to each other, a molded insulating actuating lever positioned between said perforated lugs, a pivot pin penetrating said last mentioned lugs and said lever to aord a pivotal support for the latter, a contactor pivotally supported by said lever in an eccentric relationship to said pivotal support of the latter, a coiled compression spring interposed between said lever and said contacter to effect snap `movements of the latter into and out of mentioned levers to a given extreme positionl thereof prior to cooperative engagement of another of the same by said manually operable lever, the supporting means for said manually operable lever comprising a metal cover plate, a

molded insulating spacer member interposed between said -cover plate and said base, said spacer member overlying each of said stamped sheet metal members to retain all of the Asaine in assembled relationship to said base, and means common to said base, said spacer and said cover plate for retaining the same in assembled relationship to each other.

22. A multiple circuit controlling switch comprising a molded insulating base having a main recess opening to the upper surface thereof, a plurality of auxiliary recesses located at different sides of said main recess and communicating with the latter, a metal block secured to the lower surface of said main recess and having a contact area facing each of said auxiliary recesses, said block having a wiring terminal portion exposed at the lower surface of said base, each of said auxiliary recesses having a substantially rectangular opening in the lower end wall thereof, a contactor supporting and actuating mechanism located within each of said auxiliary recesses. each mechanism comprising a punched and stamped sheet metal member of high electrical conductivity, said member having a relatively long, flat main body portion the perforated lower end of which is adapted to extend downwardly through the respective recess opening to provide for attachment of a circuit wire, said main body portion having coplanar lugs extending from opposite sides thereof and said base having ledges against which said lugs are adapted to seat, said main body portion having at the upper end thereof a pair of perforated lugs bent inwardly into substantially parallel relationship to each other,

2,374,ses

a molded insulating actuating lever positioned between said perforated lugs, a pivot pin penetrating said lastl mentioned lugs and said lever to afford a pivotal support for the latter, a contactor pivotally supported by said lever in an eccentric relationship to said pivotal support of the latter, a coiled compression spring interposed between said lever and said contacter to effect snap movements of the latter into and out of the respective contact area of said block upon corresponding movements of the former, each of said levers having an upwardly opening notch formed therein, a single manually operable lever pivotally supported relativelyto said base for cooperative engagement with said first mentioned levers selectively, said manually operable lever having guide means associated therewith to insure return of each of said first mentioned levers to a given extreme position thereof prior to cooperative engagement of another of the same by said manually operable lever, the supporting means for said manually operable lever comprising a metal cover plate, a molded insulating spacer member interposed between said cover plate and said base, said spacer member overlying each of said stamped sheet metal members to retain all of the same in assembled relationship to said base, and means common to said base, said spacer and said cover plate for retaining the same in assembled relationship to each other, said last mentioned means also acting to facilitate attachment of the switch as a whole to a suitable support. p

23. In an electric snap switch mechanism, in combination, a molded insulating base having a main recess and a plurality of auxiliary recesses communicatingl therewith, a plurality of stationary contacts mounted upon said base withinsaid main recess, a corresponding number of contactors pivotally supported relativelyto said base within the respective auxiliary recesses, a pivoted actuating lever and a coiled compression spring individual to each contacter to provide for snap movement of the latter into and out of engagement with the stationary contact respectively associated therewith, a manually operable lever pivotally supported in a manner to provide for oscillatory movement thereof in any direction relatively to said base, said last mentioned lever having means rigidly attached thereto and adapted for cooperative engagement with each of said actuating levers individually upon oscillatory movement of vsaid operating lever in different predetermined directions` selectively from an intermediate position thereof, guide means associated with said operating lever to limit the same to forward and return movement in any one of said predetermined directions prior to oscillatory,

contact, said manually operable lever having a' coiled compression spring associated therewithl to normally effect neutral or centered position thereof when each of said contactors is 1n its circuit interrupting position, and meansv com prising coiled torsion springs respectively associated with at least two of said actuating levers to insure automatic return of their respectively associated contactors to circuit interruping position and to likewise permit return of said manually operable lever to its neutral or centered position upon manual release of the same.

24. In a multiple circuit controlling switch, in combination, a molded insulating base, having a main recess and a plurality of auxiliary recesses communicating therewith, a plurality of stationary contacts carried by said base within said main recess, a corresponding number of oscillatable contactors associated with said contacts and respectively supported within said auxiliary recesses, actuating means individual to the respective contactors for eiecting operation of the latter entirely independently of each other Whereby the same are adapted for movement selectively into and out of engagement `with the stationary contacts respectively associated therewith, common operating means for said contactors, said means comprising a manually oscillatable lever adapted upon movement from one extreme position thereof to another to transiently engage the actuating elements of two of said contactors in sequence to thereby eiect disengagement of one of said contactors from its associated stationary contact and subsequent engagement of another of said contactors with its associated stationary contact, said lever being also adapted upon movement thereof to an intermediate position to insure disengagement of all of said contactors from their associated stationary contacts, and means including coiled compression springs individual to the respective actuating elements and contactors for eiecting such movements of the latter with a snap action.

25. In a multiple circuit controlling switch, in

combination, a molded insulating base having a Imain recess and a plurality of auxiliary recesses communicating therewith, a plurality of stationary contacts carried by said base within said main recess, a plurality of oscillatable contactors also carried by said base Within the respective auxiliary recesses, actuating elements individual to the respective contactors for effecting operation of the latter entirely independently of each other whereby the same are adapted for movement selectively into and out of circuit completing relationship to the stationary contacts respectively associated therewith, common operating means for said contactors, said means comprising a manually Ioscillatable lever adapted upon movement in a single plane from one extreme position thereof to another to transiently engage the actuating elements of two of said contactors in sequence to thereby effect interruption of a circuit by one of said contactors and subsequent completion of a circuit by another of said contactors, said lever being also adapted upon movement thereof to an intermediate position to insure circuit interrupting positioning of all of said contactors with respect to their associated stationary contacts, means including coiled compression springs individual to the respective actuating elements and contactors for eiiecting such movements of the latter with a snap action, and said oscillatable lever beingalso movable in a different plane from said intermediate position to a third extreme position to effect completion of a diierent circuit, said last mentioned contactor also having a coiled compression spring interposed between the same and the actuating element associated therewith to insure circuit completing and interrupting movements thereof with a snap action.

ALVIN W. KRIEGER.

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