US2490675A - Safety cutout switch - Google Patents

Safety cutout switch Download PDF

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US2490675A
US2490675A US96838A US9683849A US2490675A US 2490675 A US2490675 A US 2490675A US 96838 A US96838 A US 96838A US 9683849 A US9683849 A US 9683849A US 2490675 A US2490675 A US 2490675A
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block
bar
plates
contactor
contact
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US96838A
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Benjamin H Clare
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H17/00—Switches having flexible operating part adapted only for pulling, e.g. cord, chain

Definitions

  • This invention relates to an improved safety cutout switch, especially but not necessarily for use in automobile electrical systems, to provide etlicient and convenient means of quickly and easily disconnecting anelectrical system from its current source, such a battery, to protect the system against short circuit damage or other undesirable condition, while inactive, and upon the occurrence of an emergency.
  • the primary object of the invention is to provide a switch of the above character having'. novel construction and relative arrangement and coactionof component parts, whereby the action of the switchis rendered more eici'entand reliable.
  • Another important object of the invention is the provision of an inexpensive and rugged switch of the above indicated character which involves relative movement of a minimum number ofsimple, longelived parts.
  • Figure 1 is a vertical longitudinal section, showing the switch in closed position, and taken along the line I-I- of Figure 2.
  • Figure 2 ⁇ V is a horizontal section taken through the' upper part of Figure 1.
  • Figure 3 is a longitudinal sectionl taken along the li-'ne 3-3- of Figure 2..
  • Figure 4 is a transverse vertical section taken l along the line 4'4- of Figure 31;
  • Figure 5 ⁇ is a perspective view of thecover.
  • the illustr'ated switch generally designated 'F comprises an angle bracket s adapted to be secured to a support, such as the rewall 9 ⁇ of an automobile, with horizontal arm I0 supportably" engaging the underside of the switch housing, wherebyv the housing is mounted in the engine compartment or other suitable place.
  • the switch housing comprises a rectangular block I2 of insulated material, whi'chis centrally trawersedv near oneend by vertical mounting bolts I3, I3v passing through the arm- I Il of' bracket E.
  • the underside of the block I2 is ⁇ covered by an f insulating sheet or plate I4' overlying the bracket arm I'Il' and servingV to concealand insulate the otherwise exposed head of a 'bolt-vhereinafter describedits shown in.
  • theendffoi the 65 top of ther block I2 remote from the attaching or mounting bolts I3, I3 is overlaid by a pair of transversely elongated conductive plates I5 and I6 which extend substantially the full width of the block and having contiguous edges electrically spaced.
  • the plates l5 and Iii are each secured in place: by as'cr'ew I'I threaded' through the middle thereof into the block I'2.
  • each of the plates I5 and i6 has secured thereto corresponding binding posts I8, I9, respectively, the post I8 serving to connect the ground strap or cable I Ilv toA the plate I5, and the post I9 serving to connect the plate i6 to cable 2l of the starter motor or the like.
  • the posts i8 and I9 traverse their plates and are threaded into the block I2 whereby the plates I5 andv I6 are locked against shitting relative to the block l2 and relative to each other.
  • the binding posts I8 and I9 are located along the opposite longitudinal edge oi the block -I2 from the circuit making and breaking mechanism.
  • This mechanism comprises an assembling nut and bolt unit 22 whose -bolt 23 is threaded upwardly through the block I2, as shown in Figure 1, with its head 24 ilush with the underside of the block and concealed and protected by the insulating plate I4.
  • Thel right hand portion of the bar 25 is longitudinally overlaid by a strong leaf spring 2l also traversed by the bolt 23 with a spacer 28 intervening between the bar 25 and the spring 2l.
  • a depending heel ange E3 on the spring 2l engages the' spacer to preclude lateral shifting of the Spring 21.
  • a downwardly bowed toe 30 on the free end of theY spring 2l bears downwardly upon the4 contactor bar 25 with suicient force to assure positivev and; reliable bridging contact of the bar 2'5'l with both of' the contact plates l5 and I6.
  • a spacer 2f9' overliesthe spring 2l on the bolt 23, ancla nut 23 is turned down on the bolt 23 against the spacer/tftv to secure the associated parts in assembled: relation.
  • the free- -end of the contacter bar 25 V has an upturnied'blfu-rcatedL spiral 3l providing journals for transverse rollers 32, 32 on a pin 33 xed at the elbow 34 of' a vertically positioned belcra'nk lever 35, the lower'enfd of whose lower short arm carries va; 'trans-verse pin 3'6 journallifng rollers-"31,
  • the longer upper arm of the lever 35 has an insulating extension 3B telescoped thereon and having on one side thereof at its upper end a rotatable connector 39 for the pull rod or wire 40, working through a flexible conduit 4I secured through the instrument panel 42 or the like and terminating in a knob 43.
  • the box-like cover 45 is elongated rectangular in form and includes a depending nange 46, 4t" on one side and its ends to engage corresponding ends and a side of the block I2 to which the ilange is secured by screws 4l, 41 threaded into the block.
  • a safety cutout switch comprising an insulated block adapted to be mounted on a support, a pair of transversely extending contact plates secured to the top of said block in spaced airgap relation, conductor connecting means at one end of each of said plates, a make and break assembly overlying the opposite ends of said plates, said assembly comprising a flexible contactor bar mounted on said block at one end near one of said contact plates with its opposite end free, means electrically connecting said one plate to said contactor bar, said contactor bar overlying said one contact plate and the other contact plate with its free end reaching beyond said other contact plate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever having a roller on its lower end bearing upon the top of said block near the free end of said contactor bar, and pivot means pivotally connecting the free end of said contactor bar to an intermediate part of said lever whereby said lever can be swung in a vertical plane in one direction to roll said roller upon
  • a safety cutout switch comprising an insulated block adapted to be mounted on a support, a pair of transversely extending contact plates secured to the top of said block in spaced airgap relation, conductor connecting means at one end 'of each of said plates, a make and break assembly overlying the opposite ends of said plates, said assembly comprising a ilexible contactor bar mounted on said block at one end near one of said contact plates with its opposite end free, means electrically connecting said one plate to said contactor bar, said contactor bar overlying said one Contact plate and the other contact plate with its free end reaching beyond said other contact plate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever having a roller on its lower end bearing upon the top of said block near the free end of said contactor bar, and pivot means pivotally connecting the free end of said contactor bar to an intermediate part of said lever whereby said lever can be swung in a vertical plane in one direction to roll
  • a safety cutout switch comprising an insulated block adapted to be mounted on a supfport, a pair of transversely extending contact plates secured to the top of said block in spaced airgap relation, conductor connecting means at one end of each of said plates, a make and break assembly overlying the opposite ends of said plates, said assembly comprising a exible contactor foar mounted on said :block at one end near one 4of said contact plates with its opposite end free, means electrically connecting said one plate to said contactor bar, said contactor bar overlying said one contact plate and the other contact plate with its free end reaching beyond said other contact plate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever having a roller on its lower end bearing upon the Itop of said block near the free end of said contactor bar, and pivot means pivotally connecting the free end of said contactor bar to an intermediate part of said lever whereby said lever can be swung in a vertical plane
  • a safety cutout switch comprising an insulated block adapted to be mounted on a support, a pair of transversely-extending contact plates secured to the top of said block in spaced airg-ap relation, conductor-connecting means at one end of each of said plates, a make-and-break assembly overlying the opposite ends of said plates, said assembly comprising a flexible contactor bar mounted on said block 1at one end near one of said contact plates with its opposite end free, means electrically connecting said one plate rto said contactor bar, said contactor bar overlying said one contact plate and the other contact ,plate with its free end reaching ibeyondsaid other contact fplate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever provided with movable bearing means on its lower end movably bearing upon the top of said block near the free end of said contactor bar, and .pivot means pivotally connecting fthe free end of said contactar bar to

Description

Dec. 6, 1949 v B. H. CLARE SAFETY cUToUT swITcH Filed June 3, 1949 E B G- YIIIIIIIIIIIIIIIIIIlllllllh Patented Dec. 6, 1949 UNITED STATES PATENT OFFICE SALFETYCUTOUT SWITCH BenjaminA H.: Clare, Wellsville, Moi
Application J une 3, 1949,SerialNo. 96,838
(CL 20o-161) 5 Claims.
This invention relates to an improved safety cutout switch, especially but not necessarily for use in automobile electrical systems, to provide etlicient and convenient means of quickly and easily disconnecting anelectrical system from its current source, such a battery, to protect the system against short circuit damage or other undesirable condition, while inactive, and upon the occurrence of an emergency.
The primary object of the invention is to provide a switch of the above character having'. novel construction and relative arrangement and coactionof component parts, whereby the action of the switchis rendered more eici'entand reliable.
Another important object of the invention is the provision of an inexpensive and rugged switch of the above indicated character which involves relative movement of a minimum number ofsimple, longelived parts.
Other important objects and advantageousffeatures of thev invention will be apparent from the following description and appended drawings, wherein, merely for present purposes of' illustration, a specic embodiment of the invention is set forth in detail.
In the drawings:
Figure 1 is a vertical longitudinal section, showing the switch in closed position, and taken along the line I-I- of Figure 2.
Figure 2`V is a horizontal section taken through the' upper part of Figure 1.
Figure 3 is a longitudinal sectionl taken along the li-'ne 3-3- of Figure 2..
Figure 4 is a transverse vertical section taken l along the line 4'4- of Figure 31; and
Figure 5` is a perspective view of thecover.
Referring in detailtothe drawings, the illustr'ated switch, generally designated 'F comprises an angle bracket s adapted to be secured to a support, such as the rewall 9` of an automobile, with horizontal arm I0 supportably" engaging the underside of the switch housing, wherebyv the housing is mounted in the engine compartment or other suitable place.
The switch housing comprises a rectangular block I2 of insulated material, whi'chis centrally trawersedv near oneend by vertical mounting bolts I3, I3v passing through the arm- I Il of' bracket E.
The underside of the block I2 is` covered by an f insulating sheet or plate I4' overlying the bracket arm I'Il' and servingV to concealand insulate the otherwise exposed head of a 'bolt-vhereinafter describedits shown in. Figures 1 and 2, theendffoi the 65 top of ther block I2 remote from the attaching or mounting bolts I3, I3 is overlaid by a pair of transversely elongated conductive plates I5 and I6 which extend substantially the full width of the block and having contiguous edges electrically spaced. The plates l5 and Iii are each secured in place: by as'cr'ew I'I threaded' through the middle thereof into the block I'2. In addition, each of the plates I5 and i6 has secured thereto corresponding binding posts I8, I9, respectively, the post I8 serving to connect the ground strap or cable I Ilv toA the plate I5, and the post I9 serving to connect the plate i6 to cable 2l of the starter motor or the like. The posts i8 and I9 traverse their plates and are threaded into the block I2 whereby the plates I5 andv I6 are locked against shitting relative to the block l2 and relative to each other. The binding posts I8 and I9 are located along the opposite longitudinal edge oi the block -I2 from the circuit making and breaking mechanism.
This mechanism comprises an assembling nut and bolt unit 22 whose -bolt 23 is threaded upwardly through the block I2, as shown in Figure 1, with its head 24 ilush with the underside of the block and concealed and protected by the insulating plate I4. Overlying both of the plates I 5 and IIi and reachin-g toward the left in Figures 1 and 2` beyond the plate I5, is the at relatively ilexible contacter strip or bar 25 traversed by the bolt 23 and having a positioning flange 26 on its right handv end engaging the contiguous edge of the plate I6 to prevent lateral displacement of the bar 25;
Thel right hand portion of the bar 25 is longitudinally overlaid by a strong leaf spring 2l also traversed by the bolt 23 with a spacer 28 intervening between the bar 25 and the spring 2l. A depending heel ange E3 on the spring 2l engages the' spacer to preclude lateral shifting of the Spring 21. A downwardly bowed toe 30 on the free end of theY spring 2l bears downwardly upon the4 contactor bar 25 with suicient force to assure positivev and; reliable bridging contact of the bar 2'5'l with both of' the contact plates l5 and I6. A spacer 2f9' overliesthe spring 2l on the bolt 23, ancla nut 23 is turned down on the bolt 23 against the spacer/tftv to secure the associated parts in assembled: relation.
The free- -end of the contacter bar 25 Vhas an upturnied'blfu-rcatedL spiral 3l providing journals for transverse rollers 32, 32 on a pin 33 xed at the elbow 34 of' a vertically positioned belcra'nk lever 35, the lower'enfd of whose lower short arm carries va; 'trans-verse pin 3'6 journallifng rollers-"31,
31 on opposite sides of the arm to roll upon the upper surface of the block I2.
The longer upper arm of the lever 35 has an insulating extension 3B telescoped thereon and having on one side thereof at its upper end a rotatable connector 39 for the pull rod or wire 40, working through a flexible conduit 4I secured through the instrument panel 42 or the like and terminating in a knob 43.
The movement of the belcrank lever 35, in a plane perpendicular to and longitudinal with respect to the block I2 and contactor bar 25, is guided by a slot 44 in the top of a cover 45, secured over one side of block I2, which serves also to enclose and protect the make and brake mechanism and the underlying area of the top of the block I2. The other side of the top of the block I2 is left uncovered.
The box-like cover 45 is elongated rectangular in form and includes a depending nange 46, 4t" on one side and its ends to engage corresponding ends and a side of the block I2 to which the ilange is secured by screws 4l, 41 threaded into the block.
With the operating knob 43 pushed in, as shown in Figure 1, the belcrank lever is tilted toward the right hand end of the slot 44 and the spring 21 keeps the contactor bar 25 in bridging relation to the contact plates I5, IE thereby establishing a circuit between the battery cable 2S and the service cable 2I. When the knob 43 is pulled out, the lever 35 is tilted toward the left hand end of the slot 44, thereby causing the rollers to roll upon the top of the block I2 toward the right,
whereby the axis of the journal 32 is elevated and the free end of the contactor bar flexed upwardly enough to remove the contactor bar 25 from bridging contact with the contact plates I5 and I6, thereby breaking the circuit between the battery cable and the service cable 2i. To restore the circuit, the knob is returned to its pushed in position.
What is claimed is:
l. A safety cutout switch comprising an insulated block adapted to be mounted on a support, a pair of transversely extending contact plates secured to the top of said block in spaced airgap relation, conductor connecting means at one end of each of said plates, a make and break assembly overlying the opposite ends of said plates, said assembly comprising a flexible contactor bar mounted on said block at one end near one of said contact plates with its opposite end free, means electrically connecting said one plate to said contactor bar, said contactor bar overlying said one contact plate and the other contact plate with its free end reaching beyond said other contact plate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever having a roller on its lower end bearing upon the top of said block near the free end of said contactor bar, and pivot means pivotally connecting the free end of said contactor bar to an intermediate part of said lever whereby said lever can be swung in a vertical plane in one direction to roll said roller upon the top of said block and thereby displace said pivot means upwardly from the top of said block so as to ilex said contactor bar upwardly out of bridging relation to said contact plates.
2. A safety cutout switch comprising an insulated block adapted to be mounted on a support, a pair of transversely extending contact plates secured to the top of said block in spaced airgap relation, conductor connecting means at one end 'of each of said plates, a make and break assembly overlying the opposite ends of said plates, said assembly comprising a ilexible contactor bar mounted on said block at one end near one of said contact plates with its opposite end free, means electrically connecting said one plate to said contactor bar, said contactor bar overlying said one Contact plate and the other contact plate with its free end reaching beyond said other contact plate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever having a roller on its lower end bearing upon the top of said block near the free end of said contactor bar, and pivot means pivotally connecting the free end of said contactor bar to an intermediate part of said lever whereby said lever can be swung in a vertical plane in one direction to roll said roller upon the top of said block and thereby displace said pivot means upwardly from the top of said block so as to ilex said contactor bar upwardly out of bridging relation to said contact plates, said spring means comprising a leaf spring longitudinally overlying said contactor bar having a free end bearing upon the top of said contactor bar, and common means mounting said leaf spring and said contactor bar on said block.
3. A safety cutout switch comprising an insulated block adapted to be mounted on a supfport, a pair of transversely extending contact plates secured to the top of said block in spaced airgap relation, conductor connecting means at one end of each of said plates, a make and break assembly overlying the opposite ends of said plates, said assembly comprising a exible contactor foar mounted on said :block at one end near one 4of said contact plates with its opposite end free, means electrically connecting said one plate to said contactor bar, said contactor bar overlying said one contact plate and the other contact plate with its free end reaching beyond said other contact plate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever having a roller on its lower end bearing upon the Itop of said block near the free end of said contactor bar, and pivot means pivotally connecting the free end of said contactor bar to an intermediate part of said lever whereby said lever can be swung in a vertical plane in one direction to roll said roller -upon the top of said block land thereby displace said pivot means upwardly from the top of said block so as to ilex said contactor bar upwardly out of bridging relation to said contact iplates, said lever consisting of a belcrank with said pivot means located at the junction of Ithe arms of said belcrank 4. A safety cutout switch comprising an insulated block adapted to be mounted on a support, a pair of transversely-extending contact plates secured to the top of said block in spaced airg-ap relation, conductor-connecting means at one end of each of said plates, a make-and-break assembly overlying the opposite ends of said plates, said assembly comprising a flexible contactor bar mounted on said block 1at one end near one of said contact plates with its opposite end free, means electrically connecting said one plate rto said contactor bar, said contactor bar overlying said one contact plate and the other contact ,plate with its free end reaching ibeyondsaid other contact fplate, spring means mounted on said block near said one contact plate and urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever provided with movable bearing means on its lower end movably bearing upon the top of said block near the free end of said contactor bar, and .pivot means pivotally connecting fthe free end of said contactar bar to an intermediate part of said lever, whereby said lever can be swung in a vertical .pl-ane in one direction to move said movable Ibearing means upon the top of said lblock and thereby disp-lace said pivot means upwardly from the top of said block so as to flex said contactor bar lupwardly out of bridging relation to said contaot rplates.
5. A safety cutout switch comprising an insulated block Iadapted to be mounted on a support, a pair of contact plates secured to the top of said block in spaced relation, conductor connecting means carried fby each of said plates, Ia make-and-break assembly overlying said plates, said assembly comprising a flexible contactor bar mounted on said =block and having one end portion thereof electric-ally connected to one of the lplates and overlying the plates, the other end portion of said contacter bar extending beyond the other fplate, spring means urging said contactor bar into engagement with and bridging relation to both of the contact plates, a vertical lever provided with movable bearing means on its lower end m-ovably bearing upon the top of said block near the free end of said contactor bar, and pivot means pivotally connecting the free end of said contactor bar to an intermediate part of said lever, whereby said lever can be swung in a vertical lplane in one direction to lmove said movable bearing means -upon the top of said block and thereby displace said pivot means upwardly from the top of said block so as to flex said contactor loar upwardly out fof bridging relation to said contact lplates.
BENJAMIN H. CLARE.
REFERENCE S CITED The following references are of record in the le of this pate-nit:
UNITED STATES PATENTS
US96838A 1949-06-03 1949-06-03 Safety cutout switch Expired - Lifetime US2490675A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783216A (en) * 1972-11-06 1974-01-01 Mtd Products Inc Safety switch mechanism
US5401930A (en) * 1993-04-19 1995-03-28 Eastlund; Edgar H. Vehicular power cut off apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1480616A (en) * 1923-02-17 1924-01-15 John P Kantak Accelerating-pedal-operating device
US1862006A (en) * 1931-01-15 1932-06-07 Collins Douglas Throttle and starter control mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1480616A (en) * 1923-02-17 1924-01-15 John P Kantak Accelerating-pedal-operating device
US1862006A (en) * 1931-01-15 1932-06-07 Collins Douglas Throttle and starter control mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783216A (en) * 1972-11-06 1974-01-01 Mtd Products Inc Safety switch mechanism
US5401930A (en) * 1993-04-19 1995-03-28 Eastlund; Edgar H. Vehicular power cut off apparatus

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