US1757150A - Load-handling mechanism - Google Patents

Description

LOAD HANDLXNG MECHANISM Filed Aug. 1924 A s sheets-sheet 1 /74 .fr ff ,f J6 J5 73 7/ 5l; JJ 66 )5 May 5, 1930. F.' TNER 1,757,150

LOAD HANDLING MECHANI SM Filed Aug. 8, 1924 5 sheets-sheet 2 May 6, 1930. Y F. sToNER 1,757,150

LOAD HANDLING MECHANISM Filed Aug. 8. 1924 5 Sheets-Sheet 3 |||Ill I I Illlllln. IIH UH llnlllf l...

Patented May 6, 19`3 UNITED- STATES- FRANK-STOER, OF LAKEWOOD, OHIO, ASS:[Ghl'Ol-'k T0 THE BAKER-.BAULING ('JOIVIIIANY,v

, QFFICE QECLEVELAND, oiiio, A CORPORATION or oiiio V LOAD-HANDLING MEcnANisivr :'Appiicaticnisied August 8, 19M.` serialy No. 730,931. v

1 This inventioiiyrelates. to a load handling mechanism, wherebya load or loads may be readily lraised and lowered, or transported from one-place to another,'andd ischarged.

One object of the invention is to provide an improved mechanisniof thischaracter-ca-l pable of handling `loadsunder varying conditions. g a i 'f Another object of the invention isV to provideimproved means for adjustablysupporting the boom at varying-positions vertically f conditions without changing the size `of the Y Y boom or lengthening or shortening it `as'the whereby it may beb'perated under varying case maybe.

A further object ofthe invention is to.' lcor-` y relate or associate theload lifting means with the boom support in order that Vthe former may be utilized to elevate or adjust the boom t-o the desired operating position. Y y Other objects of the invention will be'apparent to those skilled in the art to which'rny invention relates from the following description taken in connection with the accompany-- ing drawings, wherein v i Fig. 1 is a sideelevation ofa truck Vand a load handling mechanism embodyinginy invention. 1 f Y Fig. 2 is an end'elevation of the truck` and Vload handling mechanism (with parts broken away) the latter being shown'slewed'or swiveled about its pivot toone operative position to illustrate its manner of use.`

Fig.A 3 is a fragmentary view, partly in section on theline 3-3 of Fig. 1 and'partly in elevation of the truck and load handling' mechanism, `looking at the other end of the truck.

Fig. 4 is a top 1 and 2. l v A y Figg isa section on the line 5-5 of Fig. In the drawings, 1 indicates aframe of any plan of parts shownin desired shape and form, preferably constructed from channel and angle bars suitably connected by rivets or otherwise. In theVV illustrated form of construction the frame 1 comprises' a'niainportion' 1 1 yon which the mechanismsfor raising ai'idlo'wering loads and moving the load carryingfmemben'to be later referred to, are'supported,kand a platform portion 1b, on which loads may be be :rigidly connected to the'framela anditmaybe a continuation thereof ordisposed in a plane therebelow, as` shown in the drawincgsgror theplatform portion 1b mayembody or have incorporated in or associated with it a super-posed platform, which may be'raised or lowered relative to the'fiaine 1.V Vhere the frame isiconstructed. asY lshown in the drawings, Ii preferably provide a'p'air of rel-V atively sinallltrailing wheels Zbelow the platform; portion 1b and a pair of 'relatively large'` wheels 3 below the main frame .portion 1,

' 4 indicates a inotor,'the shaft'of which is connectedA by a sutiable powei transmitting inechanism'withthe axles ofthe wheels 3 to drive thein in either direction, such mechanism being 'shown enclosed Vin a: suitable housing member 4 (see Fig.r 2)v rigidly concates a mechanism faiiyA desired construction interposed betwe'enthe motor l and housing member larand thefframexflffor 'connect-V ing them*together. The mec'lia'nismfn'iay v1 andthe axle members connected tothe housing member 4a; j

Thefouter ends of the auleVv members vareshaped to form suitable knuckles '4b on which the traction wheels Barepivoted for steering purposes, the, 'connection between the wheels or the axles therefor and the power transmitting mechanisrnbeing of .such characteruniversal joints for example-that the wheels may ybe driven while being steered. 8 indicates t-heaxle forthetrailing wheels 2; rIheV opposite ends of. the axle. 8 are preferably shaped to` provide 'suitable knuckles, which f i serve as pivotal `supportsffor the wheels 2, whereby lthey may be A`steered and thereby nected tothe casingof the motor 4. 5" indi- Y lenable the truckto be turned in areas of relatively small dimensions. 9 indicates steering connectionsbetween the Wheels J2 and wheels 3, whereby both pairs of wheels may be simultaneously operated about their pivots for steering purposes. .The connections 9 ing the platform 11, it may be swung upward- 1jr-see dotted lines in Fig. lewhen the truck is not in use. The uprights-llL-maycomprise spaced angle bars rigidly'secured to certain of the longitudinalior transverse sills of the frame 1 and extend upwardly toform a support. for a dash l5.. 16 indicates a. foot pedal associated with the platform 11, and arranged tov control the release and application of a vbrake mechanism, indicated asfan entirety at 17. 4The pedal 16 is preferablymountedon the `rod 12V so that it may readily swing upwardly with the platform 11 for reasons a1- ready set forth, Y l v The brake mechanism 17 is arranged to 3o brake the movement ofthe truck or to hold it against movement, its operating Velements being so arranged and connected to a suitable spring not shown that the latter normally acts toapply the brake and toswing the pedal'l upwardly, as shown in Fig. 1. Accordingly,.movement ofthe pedal 16 downwardly, will yrelease the brake. As a result of this arrangement,kthe truck is held against movement in either direction at all times'and can only be movedupon the positive opera- Y tion of the pedal 16. The brakemechanism 1 7is preferably constructed to act ontan element driven directly by themotor, for example awheelfo'r pulley 181v fixedto the eX- l' tended rearend of the motor shaft.` Y 23 indicates as an entirety a controller for cutting in or closing the circuit Vto the motor 4 to operate it at dierent speeds vand lin oppovto a lever 27. The lever 27is pivoted on the dashl to swing in vertical lplanes.V 28V indisite directions, in a well known manner.v The controller is operated by a shaft 24 carrying an arm 25, which isV connected by a link 26 Cates as an entirety a switch l,mechanism associated with thecontroller 23 and brake mechanism 17, and automatically controlled bythe latter through a rod 28*L to break the circuits to the controlleror tothe motor ywhen the brake is on andv to close the circuit when the brake is released, the purpose being to prevent operation of the motor ..4'by meansof the controller if thelatter is moved from its oifposition in either` direction whenthe brake isV in its applied position. By preference, the switch mechanism is interconnectedwith the con,

- a base section 34?, havingcross :barsforming troller by means of a link 28b to prevent closing of the circuit in the event the controller lever is in or is moved to an con position and attemptismade to release the brake. As this mechanism does not form part of the .present invention, but is described and claimedinLetters Patent No. 1,710,071 grantved to EdwardfI-I. Remde, lfurther description" thereof is though to be unnecessary.

29 indicates a post or steering column-rotat ably mounted in-suitablebearings 29, 292, and

connected by an arm .30 and link 31 with the ,K

steering connections.` The upper end of the column 29 has connected to it a hand lever 32.

33"indicates an "axle or pivot member disportion la and extending upwardly therefrom toform a Vertical shaftfor a frame 34. The lower `end of the shaft A33 A is fittedA into a sleeve35 which in turn maybe flangedat its seated between certainofthe klongitudinal sills constituting the main frame portion lL and platform portion- 1", The Iframe l34. comprises' a vsupport for a box'containing a battery or `batteries 36 and pairs (of upright members 437, 38, connected by upper andlower horizon- M35 'opposite=ends as shownjat, 35" andixed or tal members 39, 39. Theuprights37, 38, are

rigidly secured toV base section 34` in any desired manner.. 39a indicates 'plates disposed n at the joints between,l the horizontal members 39' and upright members 38gand serving as aconnectionfor a tiebarj39 extending from l the plate 39a to the upper` end ofthe adja-4 cent. upright 37 .A 38*l indicates a gusset disposed at the joint between each.V upper horizontal member 39 andthe adjacent upright 38, 38 indicates a shaft yextending at itsop-A posite ends through openings formed in the uprights 38,1 1ear their upper ends. They purpose of the shaft will laterappear. To provide sufficient bearings for the shaft, I secure tothe uprights hollow vbosses 38Xj into which the shaft ends extend,` (see Fig. 1). The pairs ,off upright -members y37, 38, arearranged at points intermediate thefront and rear end of the base section 34a to provide space for supporting a loadsupporting member, such y as aboom 40, and a motor 41, a power transmitting mechanism 42 `and operating rmeans 43,. 44, which 'will later be described. The base section 34a is formed near its front end and between ythel'uprightmembers 37, Vwith an opening, which vreceives a bearing collar 46 to rotatably engage abearing; provided von the shaft 33, the -collar 46"being provided with a ange by means of which itis bolted to the underside ofthe base section 34a. 47 indicates a geariixed to the col-lar 46. The

gear 47 preferably fltsand is suitably secured l in an annular recess formed in the lower end ofthe collar 46 `or a ringiixedfthereto.- r The geareis' engaged by a' pinioirwhich serves as a suitable-element by meansof vwhichthe 8o posed in vertical position onlthe mamv frame l sor,

frame-orisupport 34 is rotated in-either direction about the shaft' 33 by suitable power means (not shown). The powerfmeans is vpreferably operated by :an electric motory which in turn is controlled :by a controllerr 76a.. The controller is operated in either 'direction by a lever Ttb'mounted on the dash 15 and connected to the shaft of the controller by connections 76C (see Fig. 2) The motorV may be driven in either direction and it iny turn through the power means will rotate or slew the frame 34 to either side of thetruck y' frame 1, as desired, as shown in F 2?` Iiitermediate its ends the upright members support a bearing box 50, which receives they upper end of the shaft 33and (3o-operates with the collar 46 to form spacedy bearings between the shaft 33 andthe support or frame 34 for the latter to rotate on. ,The opening for the collar 46 and shaft 33 is preferably arranged near the front end ofthe .frame 34so`as to be substantially centrally ofthe weight of the batteries 36, motor 41 andpower transmitting mechanism 42and the boom 40- inner faces of theuprights'` (as shown inV Fig. 1) which are preferably .formed from channel bars for a reason which willv presently` appear. 511 indicatesangle bars disposed along the outer longitudinal edges ofthe plates 51, each angle bar being positioned so that one wall of the bar. may be riveted to the plate, as shown in Fig. 5, and its other wall project laterally outwardly, sok that it may co-operate with the plate 51 and outer flange 37 of the adjacent upright 37toforin a guide' 51e, the purpose of which will later v be set forth. 51d indicates a 'plurality of cross bars extending between andsecured aty their opposite ends tothe anglebars 51b and serving to support them and the plate 51 in alignment. 51C indicatespairs of aligned Vopenings formedin the guides 51-, preferably midway between the angle bar 51" and the fiange 37 one pair of openings being formed adjacent the lower ends ofthe guides and the remaining pairs being arrangedV along the upper portions of the guides, although a larger number may be provided,- if desired.

The openings 51C serve to receive a rod 52.y to

which 'reference will later be .made The VVwalls of the openings 51 are preferably reinforced by plates 52 secured to the inner facesvof the plates 51 in any desired manner.

' The boom 40 preferably comprises a-pair'cf channel'members40a arranged in spaced relaf tion, `but-slightlyV converging toward their upper ends. Theupper portions of themembers 40il may be curved forwardly and downwardly. `The channel members are secured togethertinspaced relationby aplurality of cross-pieces 402.40, 40d` and diagonal pieces 40er, `40f. "At a pointl. remote from V`their free ends, rthemember-40EL are provided with-upstanding platesf53,thepurpose ofwhich will laterv appear.,V v52X` rindicates as an entirety a `supporting means for the boom 40 and slidably mounted inthe guides 51,c to-beadj'usted Atherein andiixed thei'etoat any desired posil- A d tionV intermediate itsfends, the purpose lbeing to jraisefand lowerpthe 'fulcrum of the boom 4,0`so that theoperating end. of the.r` latter and-the load engaging member suspended' Ytherefrom may,` be` adapted for various conditions. without kthe necessity ofzjsubstituting Va new yboom [or changing-itslength. Offthe supporting nieans52?,l52*indicates a pair of pIateshaVng ianges 5'2bfalong their oppositeirlongitudinal yedges andslidably fitting,

the guides 51C.Vv At their lower ends theplates 5 2a aire provided withfhollowbosses 52" (preferably formed integrally therewith), which support'the inner ends of tubular bearingniembers 52V.. `The inner ends of the bearingV members 52C are flanged., and fit within annular recesses formed inthe innery wall of the bosses 52btohold themembers. against 1 movementioutwardly. Theouter ends of the bearing members 529 extend-through knuckles 40* provided on the! lower orvinner ends of the channel bars 40a, so as to form a fulcruin for the boom'40.V As shown inFig.V 5, the rod 52 4extends throughone lpair. ofthe openings 51 and tubular bearing members 52C and thereby connects the supporting means 52 to the Yguides 51C. By removing the rod 52 and adjusting thesupporting means 52) along the `guides 51c to align the tubularbearing members 52V with'another pair ofjopenings 51C and their inserting the rod 52therein, the fulcrui'nffor thelower end of the boom will be adjusted to position itsoperating end at a greater yor lesser height according to the adjustment i-jeferredto.` ,i The opposite' ends of`A he rod 5,2 are provided with removable de-V vicesg suchgascotter pins, topreventits end-V wise movement. '-.Theboom is. .swung iip- 'Y Vwai-diy and downwardly about its fulcrnm by 4any suitable means. butpreferably by means ofacable or other iiexible connection 40connected to theoperating means 43.

f. y 55 indicates as an entirety a member for engaging a load, whereby the'load may be raised.

orV lowered oi' otherwise handled. Theload engaging member may be ofany desired construction, such as a clam shell bucket or a platform, but for illustrative `purposes I have shown' such member as `Comprising a hook V,depending','from aicasing 56,;w-hich in turnis supportedor suspended from the freeend of f the boom by a cableior other flexible connection 57,Y connected with the operating means-44 as will be laterdescribed.

The operating means 43, 44 comprise a pair of drums 58,.:59,:onv which the cables 40', 57, respectively, windand unwind, for swinging the boom ..40 about/"its pivotal support and for raising jor lowering the load engaging member 55,` The drums 58,59, arefrotated independently of each otherin either direction? in the manner to be later set forth, to swing the boom 40 and raise orlower the; `member 55.` The cable 401may be connected y vat its inner, end to the drum 58 iny any de- Y siredmanner. :From thevdrum 58 the cable 40 leads'to and around a sheave40xtrotat- Y ably supportedion the shaft 38 it then reeves y Ythrough and around-a plurality of sets of sheaves 61, 62, supported in suitable blocks,

respectively, asclearly shownin Fig'. 1,.op.

erativelyy connected with the frame 34 yand Vplates 53. The opposite or outer end of the 'cable is carried down.- and connected or anchored inany suitable manner. j

fThe cablef57 Vis connectedat itsinner end in anysui-table manner to the drumV 591v From thedrum59, the cable 57 runs around -a guide sheave 69,'supported on and near the upper end of the adjacent upright member 37, and then around a sheave 7 0 loosely mounted on the adjacent tubular member 52. Frein the 4sheave 70 the cable 57'eXtends over a sheave 71, rotatably mounted on'a rod8, which is supported at its opposite ends bythe plates- 53. From the sheave 71the 'cablereeves around a sheave'72 supportedinl the free end ofthe boom 40, then around a sheave 73 mounted in the casing 56,1and then" around a sheave (not shown) supported in the :tree

end of the boom 40, theqouter end of the cable being carried down and Connected by a. socket and loop to the'shaft ofthe sheave 73; 102 indicates Y as an entirety a casting' Y shaped and constructed to form-'a cradle 102 -tor themotor 41 and a housing-section 102b for l the power transmittingV mechanism 42 by meansof which either drum :58, 59, may be driven. The casting' 102 isrigidlyconnected to disksk 104, which are provided with integralextensions to provide feet 106, secured to angles. 107 carried by the upright members 38. The feet 106 operatethrough the disks or members 104and therhousing and cradlefcasting 102 -to support the motor 41 andpower transmitting mechanism 42 in lixed relation upon thesuppo-rt 34 and in operative relationshipto Teach other. The

motor 41 is fixed tothe ycradle 102aby a plnf rality of screws `10 i 1081 indicates a housing section shapedto t upon the open lend of the housing section 1021"V and beY clamped thereto and also toV enclose the propeller shaft connected lto theshaft 109 of the motor 41. The housing section 108.`is adapted to support'apair-,of spaced bearings for the propeller'shattl4 Between the propeller shaft bear-ings, the shafty is provided with a worm` 110 'whichmeshes With anddrives a ring gear forming Vone ofthe velements of the transmitting mechanism 42.

The vpower transmitting mechanism 42 Vfor the'operating means 43, 44, may be of any desired construction. VIn practice I have -used a well known type of differential.mechanism, such as is commonly used tor driving the power i Wheels of automobiles.v Such mechanism may be similar'in'construction tothe usual difterentialmechanism utilized in thetrucl construction herein illustrated for driving the wheels e from the motor 4. the use of ya :dilerential mechanism a single motor may' Vcables is wound thereon-on payed-out to swing the boom or Operate the member 55. Each controlling means preferably comprises sieV a clutchand magnetically operated elements to release it, adapted to beconnected in series with the motor 41 in suchinanner under the control ,of a selector or lever 143that-when the motorisoperated either drum, at the will of the operative, is driven; Y Y .A

-To carry outthese operations, I provide (1) the lever 148, pivotally m'ountedfon the dash 1 5 and connected through an arm 144 and link 145 with a crank arm 146, which isconnected to the shaft ot acontroller indi- Y cated as anentirety'at 147'; and aV lever 148, pifvotally'mounted on the dash 15, and Vconnected through an arm 149 and a link 150 with acrank arm 151 which is connected toy the shaft eta switch device 152. The pur? pose ofthe-controller 147 'is to supply current to the motor 41 to drive it ineither direction,

such Vvoperation being dependent upon the movement ofthe lever V143 to either side of its neutral position, asshown inFig.l 2. The purpose ofthe switchdevice 152 is to 'select or Vconnect in either of the magneticallyfcon- 12d trolle'd elements, dependent upon which one los or the drums is to be operated, in series with i the motor 41, so that upon the operation of the controller lever 148, the selected drum will be rotated in one direction or the other, according to the direction ot movement'of the lever. 7 l I Y As thepowcr,transmittingmeans 42, holding' and lockingmean's` `and release means, as well as the selector means is the invention of EdwardH. Remde, and forms the subject imV Y matter-Othis co-pendingapplication, Serial` Aconstructimi.

s 7 vmast/,150

the batteriesBG andco-operate with the drum` controlling means herein referred'to'; but it will be understood that .the controlling means and the motor may b'eioperatedin any .other manner. VThe motor 41 may be of any desired t preferably has associated fwithv it a brake mechanism,indicated as an Ventirety at 153, to stop the rotation of its i Ashaft and elements driven thereby following .the opening .of the motor circuit. Ofthe` brake mechanism' 153,154 indicatesaabralre tended beyondthe-upper end of the motor `casingfor this purpose. l155,155a,indicate s Y v, s, Y Y Y Fromthe foregoing descriptionlitV will be brake shoes pivoted atlcorresponding `ends upon a shaft 156 mounted'in a.v boss Von the adjacent end ofthe motor casing. A The oppo-l site ends of the shoes are connected to a pair `of levers 157, 157a,which are soconnected to each other thatl upon the movement ofv theV latterY in one direction the levers .will

. operate to clamptheshoe's against-the brake load engaging element )Y ata predeter mined position bya mechanism which in#l ivheegl; The lever `157?vr is connected` tozone arm" 158 of a lever-[159, which iis mounted-V upon a shaft 1 59a suitably supported by the motor casing. The arm 158a ofthe lever 159 is connected to one 'end of a spring 160. Y The spring 160 operates to move theflever '157a vin thatV direction which appliesthe brake Y jshoes andthus normallykeeps thelatter in,v lbraking position. To release the brake shoes, Y vthe lever159 is rocked aboutV the pivoter vshaft'159a in the'oppositedirection, this operation being preferably effected by a 'sole-V noid 161,thecore of which is connected by alink 162 with the arm 1582 of the lever 159.l

Y is cle-energized and thuspermits the spring 160 to automatically actuate the brake shoes to clamp the brakewheel.

As willbe understood v description,` the load is raised andlowered by winding the rope 57.0n or unwindmg it from t-he drum 59, the boom 40 isswung upwardly Y 55" or downwardly by winding the rope LOon-or.

unwinding it from thedrum 58 and the support 34 isswung or rotated about the shaft 33 by the drivingof'the gear 47. The movement of each of these elements is automatie Acally stopped when moved in either direction (except in the downward movement of the cludes a switch means that opens the circuit to-the motor that voperates such element.k The switch means for stopping the Amove-` froin thefforegoing ments just referred tofmaybe similar in con-A struction, each vbeing preferably. similar in frame 34is "indicated at 163'; the switch means for stopping the lmovement of the'boom 40 isindicated at 165 and is arranged'to'be actuatedbyspacedtappets 167 on a=rod166;"

and the switch means for stopping the rais-V ing of the load engaging member or element 55fis indicated at 169,`it lbeing actuatedv by a' spring 175 when the weight 174 is' raised by the-casing56 torelie've pull ofthe cable 170 on the arm 171. i

seen thaty Iihaveprovided a load handling mechanism-` infwhich the load" mayfbevmoved on operatedin any onelofa plurality of directions in arrapid and simplemannen'and ,l

that I am enabled-to Veect the various operatends towardeconomy and simplicityas well Y' as compactness of the construction.` Y It will also beseen that by the provision of the vertical guides 51c and afulcrum or sup,.-V

porting means which adjustably engage Vtherewith, I may bodily raise Vorflowerthe boom 40,' thus enabling ,its free end and thel load engaging membersuspended vtherefrom necessityY of a'truckvcarryinga diiferent size boom, or'substituting a'ne'wcboom. Y

.Y .positioningfthe sheave 69 at the eX- treme upper end` of the upright 37 Vandthe sheave70 on the fulcrum for V.the .boom 40,

I may utilize the operating means 44' and load raisingfand loweringvcable 574 operated lthereby to Vraise and lowerl the boom support-AY ingfmeans y 52X3to` adjust it '5to the desired sheaves.v v-In raising the,v supporting means 52X', Ifirst'engage the hook 55 with one of the cross members of thevboomllO, next I remove` the" rod .52 and then I vrotate the drumk 59 yin thef direction towindthe vcable 57 thereon, the

fico to be adapted to handling loads under many. diiferent L conditions, thereby avoiding Athe j height, since Ithecable 57 reevesaround these v effect of which-will be to slide tliefsupport'- l ing means 52* in the guides 51", such winding continuing until the supporting-means 52X is adjusted 'to the desired position, in alignment witha pairof openings 51,ffollowing which the rod 52 ,isreplaced In moving or adjusting thesupporting means 52xr down-V wardly, I proceed inthe same manner, but

to payoutithe cable 57. Due tothe fact that the boom 40 isffu'l'crumed on theframe- 34 and connected, thereto through the cable.v 4:0',

rotate theLdrum 59 in the opposite VdirectionY l' l are not intended to bel in any' sense limiting.v

` said boom thereon, a flexible member extendswing the boom upwardly.I 1 Y To those skilled in the art tol which my inventonrelates many alterationsin construcvtionand widely diieringlembodiments and 'applications of `the invention vwill Asuggest themselveswithout departing rfrom the spirit and scope thereof. The disolosurestand the" description herein are purely illustrativeand What Iclaim is: y l. In apparatus oftheV -t`o said guide for supporting the lower end of "ing downwardly from the outerA portion of said boomand lcarrying' an element arranged to: engage a load or be ai'i'clioi'red-,-.shea-vesp n Y V v.said plates alongsaid guides.

ai'oundwhicli said vmemberreeves",V `one of. said sheaves being supported above the upper limit of adjustment of saidisupport along saidV guide Yand theother sheavebeing mounted on said support, yand mechanism for windingup or paying out said.. fleXible`member, whereby a load may beengagedand moved -or,fupon 'anchoring oi' the load engaging felement, the 1.30

boom support may be adjusted to anotherpositionf n i. 2. In apparatus-of the class described,y the :combination of a `frame. a1 guide' onv said frame, a slide-movably engaging said guida* means for adjustably. connecting said slide to said guidefa boom fulcrumed onxsaid slide,

j a flexible member connected tosaid boomi'orr Y swinging it aboutV its fulcrum, a flexible meniber Vextending downwardlyffrom the outer portion of said boom andfcarrying` an element arranged torengage aloador belanchored,` sheaves around which the vlast-menclass :describechffthe 'combination ofa frame7 arvertically 'arranged y guide. a` boom,V a-suppoit adjustably 'secured :the operation of saidfmechanism Will adju'stj said supporting means. I v

.4( Inl apparatus ofthe class described; the

v combination of aft'rame, a supplemental frame rotatably mounted on said frame,` a pair of;

supplemental frame, aboom, a pair of plates to which saidboom is fulcrumed slidablj7 engaging vsaidrguidesya device for removably y* connecting said plates to saidk guides, a load engaging member, v means lfor rotatingsaid supplemental trame,V axsheave cariiediby one Vvertically extending guides mounted-on said 7 saidiload engaging member, said mechanism including a flexible member running around said sheaves and connected to said loaden- A gaping member. whereby upon anchoring of said'flexible member', and removal `of said device, operation'of said mechanism will slide' 5. Inappaiatus ot' the class described, the

'combination' of a frame7 a pair Vof' guides fr mounted on*l said frame,- .a boom5 supportingf.

.means for the -fulcrum 'of said-'boom adjustablyengaging sa1d'guides,a11oad 'engaging member, asheave carried by` said supporting means', a s heaye carriedy byl said `frame above Vthe liinitofa'djustment of 'saidiulcrum supporting-means, and mechanism for operating said load engaging member, said Vmechanism including a iiexible member running around said sheaves and connected to saidload -engaging member, whereby upon anchoring of the outer-portion of said yflexible member, the operation of said'me'chanismpwill adjust said supporting' means.`

. Intestimony whereoil have hereunto-'sub- Y scribed my name.` f'

`.tioned iiexible member-reeves, one oi' said ,Y i Y sheaves being supported `above fthe Y upper limit of adjustment 'oi'.said slide along said Vguideand the other sheave lbeing mounted on-A said slide. and adrum for winding up or paying outeachjof said members. Y

' 3.. In apparatus ofthe class described,. the combination ot a frame, a supplemental frame rotatably mounted on said frame, a .-pairfoy j n vertically extending'guides'mounted on said supplemental frame`l a boom;V supportii'igV means for the fulcrumoi said boomv adjustably vengaging said guides,' load .engaging member', means for rotatingsaid supplemental frame, a sheave. carried bysaid supporting means, a 'sheavegcarried bysaid supplemental frame above the 7liniitof adjustment'- `offsaid fulorum supporting means, and mechanism foroperating said'loadfengaging member, said mechanism including a eXible member running aroundA said Vsheaves and connectedto said load engaging member, wherebyfu'pon anchoring offsaid lexiblemember,

ifs

Y vFRANK srouiiii.

l'nu

CERTIFICATE OF CORRECTION.

Patent No. 1,757,150. Granted May 6, 1930, to

FRANK STONER.

It is hereby certified that the name o the assignee in the above numbered patent was erroneously writtenand printed as "The Baker-Rauling Company", whereas said name should have been written and printed as "The Baker-Raulang Company", as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 24th day of June, A.. D. 1930.

M. J. Moore, (Seal) Acting Commissioner of Patents.

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