US1780265A

US1780265A - lolley

Info

Publication number: US1780265A
Authority: US
Publication date: 1930-11-04
Anticipated expiration: 1947-11-04

Description

W. H. LOLLEY Nov. 4, 1930.

LIFTING JACK Filed NovA l21 1926 3 Sheets-Sheet 2 uvntop @13 hw Sttoznea i Nov. 1., 1930.

LIFTING JACK Filed Nov. 12, 1926 3 Sheets-Sheet 5 gnventot Patented Nov. 4, 1930 PariszNrV ol-"rlcs WILLMM H. LoLLEY, orl NEW YORK, N. Y.

LIFTING JACK Application mea November 12, 1926. seriai No. 142907.

This `invention relates to lifting acks, and more especially to jacks for raising automobiles. i Y g v VThe advent of balloon tires has made it necy 5 essary'toprovide jacks which, Vwhen in their collapsed state, will ybe ofy relatively low' height, so that the jack can he readily placed below the axleof an automobile, which has dropped due to a puncture in the balloon tire.

Jacks having comparatively low vertical dimensions when in their collapsed state have previously been proposed, such jacks being operated to effect` the raising of the upper l end thereof by means 'of a screw-threaded rod engaging spaced nuts pivotally connected.

to llevers arranged somewhat in the form of lazytongs. vIn such jacks, the force for actuating same is applied in a 'horizontal direc-- 20 tion, and it isy only the vertical component of this force which isuseful in effecting the operation of the jack. This vertical component is comparatively small when'the jackjis in its collapsed condition, andl is comparatively 35 great when the jack is in its extended position; while, in such jacks, the amount of vertical movement corresponding to the horizontal movement of the pivotal 'points of the lazy tong levers is much greater during the initial 30 operation of-the'j ack when in its lowerinost position, than during the finalv operationV thereof when in its extended position. It is thus obvious that the force applied to the n jack for operating the same must be very con- '30 siderably greater during the'initial operation thereof, than during the final operation.

The primary object of the present invention is to provide a jack in which this dis- 40 parityin the amount of force to be applied at the commencement and at the end of theA 50 to said lrest for a uniform yhorizontal com.

po-nentV ofthe movement of the upper ends of said pivoted levers. f

Further features .of the invention are brought out in the accompanying description, and arey particularly set forth in the accompanying claims. i y i vfn order that the invention may be clearly understood, reference is made to the accom? panyingY drawings, which illustrate, by way of example, two embodiments of the invention, and in which Figure l is a front elevation of`one embodiment of my invention showing the jack in extended conditionin full lines and in collapsed condition in dotted lines;

Fig. 2 is a side elevation ofthe jack in its extended condition;

Fig. 3 is a front elevation of a preferred embodiment of my invention showing the jack in collapsed condition and giving a dial grammat-ic illustration of the rise per each four revolutions of the operating screwg' Fig.l t isV a side elevation of the upper part of the jack illustrated in Fig. 3 when in itsV extended condition; f

Fig. 5 is a side elevation of the upper part of a jack in its collapsed condition illustrating means for stabilizingV the rest.

. The einbodimentV of the invention illusated in Figs. l andQ of the drawings comprises a pair of levers l and 2 preferably crossed, as shown, at their lower portions and pivoted at their lowerends to pivots 3 and l respectively, such pivots being respectively mounted in lugsv and 6 extending upwardly from a base plate 7. The base plate 7, with the upstanding lugs 5 andr 6, may be cast, ify desired, but preferably it is stamped from sheet metal, the lugs being cut from said metal and then bent upwardly.

The levers l and 2 are pivotally connected preferably at their upper ends to

members

8 and 9. These members may both be screw threaded nuts, though as shown in Fig. -1 one 0f 'such members, 8, comprises a .bearing for the end of the screw-threaded operating shaft l0, and the other of such members 9, forms a screw-threaded nut which engages on said screw-threaded operating shaft l0. Any suit-able meansmay be provided for ac- Atuating the screw-threaded operating shaft ,shaped slot 14 provided in the lever 1.

Pivotally connected at their lower ends to i the members 6' and 9, or to the upper portions of the crossed levers 1 and 2 respectively. are

' two crossed

levers

15 and 16. These crossed levers are not pivotally connected together. but the free ends of such levers are adapted to rest respectively upon members 1S an d 17 mountedA respectively intermediate the ends of such lever. such members being` preferably inthe form of rollers pivotally mounted on such levers. Said levers 15 and` 16 at the portions thereof which engage the

members

18 and 17 are respectively provided with

cam surfaces

19 and 20, the cam surface 1f) on the lever 15 being,T adapted to engrage the member 18 on the lever 16, and the cam surface 20 on the lever 16 beingr adaptedrto the member 17 on the lever 15. The cam surfaces 19 and l2O are preferably provided on the inner edges of the levers 15 and 16., though, .if desired, they may form the upper sides of slots provided respectively in the

levers

15 and 16.

Resting-on vthe outer portions of the levers 1.5 and 16 is a rest 21. This rest in the embodiment illustra-ted in Figure 1 is provided with

members

22 and 23 which respectively engage cam surfaces 211A and 25 on the levers and 16l respectively. The

members

22 and 23 may be in the form of rollers. as shown pivotally mounted on said rest. though. if desired, they may comprise ridges or the like projecting downwardly from the under surface of the rest 21 or may be dispensed with in which case the under surface of the rest will rest directly upon the cam surfaces.

' The cam surfaces 211- and 25 may be provided on the outer edges respectivelyv of the

levers

15 and 16, though. if desired, they may form the lower sides of slots provided in said

levers

15 and 16 respectively.

If the cam surfaces 2l`and 25 form the lower sides of slots in the

levers

15 and 16 respectively, the

members

22 and 2% would hein the form of pins and rollers, and the upper sides Vof the slots would engage upper sides of such pins or rollers. and would thus help to stabilize the rest 21 in its position on `the

levers

15 and 16.

ln rorder to prevent any possibility of a rockingy orhorizontal movement being impartedto'the rest21,"when a weight is supported tnereon, such rest is provided with depending' arms 26 which embrace the

levers

15 and 16, one or both of such arms being provided with a vertical slot 2T, in which a pin or pins 2S is or are adapted to operate. Each pin 2S extends outwardly from and forms the pivotal point of a pair of links 21), 30, the free ends of which are pivotally connected respectively to the

levers

15 and 16. Such links in the embodiment illustrated are provided intermediate the levers and the dcpending` arm or arms 26.

Each of the

levers

1, 2, 15 and 16 comprises spaced side members 1, 1; 2, 2b; 15, 15"; and 16"-, 16" respectively, which are held rigidly in spaced relation with each other by any suitable means, preferably by means of transverse webs 31 extending,- therebetween. rEhe lever l is located between the spaced side members 2a, 2b, of the lever 2, the transverse webs 31 in the two levers being so positioned as not to interfere with the full extent of the relative movement between the two levers. The lever 15 extends between the side plates 162, 16h, of the lever 16, the transverse webs 31 in such levers being so positioned as not to interfere with the relative movement of said levers.

v1n order to increase the stability of the jack when in its extended position, the side plates of the lever 15 are each provided with an open-ended slot 33. in which a pin 32, moimted between the side plates of the lever 16, is adapted t0 be positioned when the ack is extended to its maximum amount.

rEhe embodiment of the invention illustrated in Figs. 3 and L1 of the drawings operates upon the same principle as that illustrated in Figs. 1 and 2 of the drawings and comprises the lower pivoted levers 1 and 2 and the upper

pivoted levers

15 and 16 which rest respectively upon the

rollers

18 and 17. The raisingY` and lowering of the jack is effected by means of the screw threaded rod l() which in the embodiment illustrated is provided with left and right hand threads 10% 10b which operate respectively in

nuts

8 and 9 located at the points where the upper ends of levers 1 and 2 are pivoted to the lower ends of

levers

15 and 16.

The important feature of difference between the construction according,` to this embodiment and tl rt illustrated in Figs. 1 and 2 of the drawings comprises the means for effecting the steadying of the rest 21 which. as in the embodin'lent ineviously described. rests upon the upper free ends of the

pivotcd levers

15 and 16. The means for steadying the rest 21 in the present construction comprises, as in the former construction, a plurality of links pivoted together at their upper ends by the pin 28 and pivoted respectively at their lower ends to the levers 15 and' 16. rlhese links however. instead of bein T v l t disposed in planes between the outer faces lill provided 'substantially in the vertical een tral plane oi `the jack and preferably comprise a single link 30 pivoted at its lower end lto the lever 16 and two links29a and 29h on opposite sides oit said link 80, which are piveted Aattheir upper ends tothe link 30 and at their lower ends to the'lever 15 as-illustrated in Fige. The pin orming'the pivotal connection V`tothe upper ends or the links extends between vertical' slots 27? in the two arms 26a deper'iding from the lower face oi the rest` 21 between the side members of the links' 15 and 16 and embracingsaid

links

29, 29h and 30. i

AThe lower ends of the links 29a, 29h and 30 are preferably pivotally mounted on pins 17a and lacextending respectively between the side-members of the

levers

15 and 16 which pins preferably term the pivots for the rollersorthe like 17 and 18 which engage the cam surfaces 2O and respectively.

Such links

29, 29b and 30 are maintained in delinite .spaced relation betweenthe side members oic the levers by any suitable means such as collars mounted on said pins 17a and 1 8at andA extending between such side members and the links. f l

ln the construction according to the sec# ond, embodiment, the restQl is provided with downwardly extending portions 21a andv 21b vwhich embrace the links 15 `and 16.

' Also inthe construction according to the second embodiment;` the stabilizing means comprising the open-ended vslot 33 and pin BQillustrated in'Fig 1 or the drawingsis omitted, since suclrmeans are not essential for giving stability to the ack-accordingto such construction.

.Referring to the embodimentillustrated in Fig. 5 of the drawings, the depending side portions 26 of the rest 21are not provided with vertical slots, but these side portions adjacenttheir

outer edgessupportfpins

36, 37 extending between such side portions'and through slots 88, 39'provided in the outer ends of the

upper levers

16 and 15 respective# ly. These slots are ofsuch shape that during the raising of the rest the

pins

36 and 37 will respectively slide therein. f

i rSuch means will prevent the lifting ofthe rest relatively tothe upper levers but'would not prevent .side movement of the rest. In order to prevent this side movement one or more depending members 40 are 'provided which extend-downwardly trom the under surface of the-rest. The-sideaces 41, L42 of these depending members are ofthe contour illustrated in the drawing, such'co-ntour being rdesigned s o that said sidefmembers will engage against'pins 43, 44 or theflike exten-ding between lthe side members of the upper levers and forming the pivotsffothe will permitY full eXtensiono'lthe jack Aeven thoughthe side members of theupperlevers 15 and 16Lare connected at'their outer ends by

webs

47, 48.

By such means bothvertical andv horizontal 'stability'of the rest is insured. Mounted on theupper :taceof the rest is a bearing'member49 ofspeciallform. Y The essential feature of thisl bearing member is that it extends transversely of the rest andhas an upper vface or faces ofr arcuate form extending in suchV transverse direction. In theI form illustrated in Figs. 3 and 4 of the drawings, this bearing member is of U-shaped 'form havingl upstanding sidev portions 50 land 51.Y vThe base 52; ofthis member rests upon thel upper face of the rest and is connected thereto by any suitablemeans such as riveting, with the saidv side vportions 5() and 51 extending transversely of the rest; l

As clearly shown in Fig. 4 of the drawings, the upper' edges of each of said side members are of arcuate form'. The great advantage of a bearing member ofthis type is that the' load will always rest upon the jack intermediate the side edges of the rest and thus the line of support will -always lie lwell within the upper face of the restrand side 'strain on the jack will be reduced Very appreciably. This is of special importance when the jack is rplaced under the laxle of an' automobile since the raising of the car willcause a tilting ofy the axle in which case, ,unless special means were provided as in the present case, the 'axle would rest uponthe inner-edge of the rest and considerable side strain would .bey placed upon the rest. Y :i f 5 'A further advantage of the'bea'ring member is `that the contact-between the bearing member and the'load willv always be` more than point contact which of course would occur between a tilted axleand the corner of the rest if the rest were not wpro-vided with special bearing means to obviate such i disadvantage; thus the tendency tov slip between pendentof each other' and connected to the rest separately or they may be stamped outv from the upper facenof the rest. :Also the bearing member may have one broad bearing face'of arcuate form instead of the two bearing edges in the form illustrated.

AThe operation of the jack is'V as follows:

ilo

When the handle kconnected to the shaft 1() is operated and the screw-threaded shaft thereby turned, the levers 1 and 2 are turned about their

pivots

3 and 4 respectively, the upper ends of said levers being drawn together and raised. The lower ends of the levers and 16 are also drawn together but during the initial movement of the jack there willbe very little turning movement of

thelevers

15 and 16 abouttheir pivots, since the outer portions of the cam surfaces and 19.are so formed that they will merely slide on the

members

17 and 18 without tending to turn the leversupon which they are formed to any appreciableextent about their pivots. As the operation of the jack is vcontinued and

Ythe members

8 and 9 are drawn closer together, the inner portions of the cam surfaces 19 and 20 will engage the

members

18 and 17 respectively and owing to the special form of such inner portions of the cam surfaces, pivotal movement of the

levers

15 and 16 wil-l be effected and then gradually increased. The cam surfaces 24 and 25 onthe upper sides of the

levers

15 and 16 are of a known type being so shaped as to exert a gradually increasing vertical movement to the rest 21 as the actuation of the jack continues .beyond a cer-tain point, the shape of such cam surfaces also being such that -u-p to such point they do not exert any lifting movement fon the rest 21 apart from that which is caused by `the upward movement of the .levers 15 and 16 as a whole. The shapes of .the two pairs of lcam surfaces 19 and 20, and 21 and 25 are so designed that for equal horizontal movement of the

members

8 and 9 towards each other, `that is for equal amounts of rotation of the screwthreaded operating -shaft 10 substantially equal vertical yniovement will be imparted to the rest 21.

The'links 29 and 30 will not interfere with the relative movement of the

levers

15 and 16; they will -operate merely to stabilize the rest v21.

respectively, means for turning said lower pairof levers about their pivots, a rest, means on said upper crossed vlevers for supporting said rest, and means fon each uppercrossed lever for engaging 'the other upper crossed `lever for effecting the raising 'of the Iupper ends of said upper levers whereby the turning of said lower pair of levers about their pivots will give to the rest a substantially uniform vert-ical movement for a uniform horizontal component of the movement of the upper ends of the lower levers.

2. A lifting jack comprising a base member, a pair of levers pivotally mounted at their lower' ends to said base member, a pair of upper crossed levers pivotally connected at their lower ends to the lower pair of levers, means on each upper lever in slidable engagement with the other upper lever for supporting the free ends of such levers, a rest, means for supporting said rest on said upper levers, and means for turning said lower pair of levers about their pivots.

3. A lifting jack comprising a base member, a pair of levers pivotally mounted at their lower ends to said base member, a pair of upper crossed levers pivotally connected at their lower ends to the free ends of the lower pair of levers, means on each upper lever in slidable engagement with the other upper lever for supporting the free ends of such levers, a rest, means on said rest in slidable engagement with the upper levers for supporting said rest on said upper levers, and means for turning said lower pair of levers about their pivots.

4. A lifting jack comprising a base member, a pair of levers pivotally mounted at their lower ends to said base member, a pair of upper crossed levers pivotally connected at their lower ends to the free ends of the lower pair of levers, ymeans on each upper lever intermediate its ends in slidable engagement with the other upper lever for supporting the free ends of such levers, a rest, means on said rest in slidable engagement with the upper levers for supporting said rest on said upper levers, and means for turning said lower pair of levers about their pivots.

5. A lifting jack comprising a base member, a pair of levers pivotally mounted at their lower ends to said base member, a pair of upper crossed levers pivotally connected at thei-rlower endsto the free ends of the lower pair of levers, means for turning said lower pair of levers about their pivots, a rest, means for supporting said rest on said upper levers, a -cam surface on each of said upper levers, and means on each upper lever intermediate its ends'adapted to engage said cam surface on the other upper lever for supporting said upper levers, whereby the turning of said lower pair of levers about their pivots will give to the rest arsubstantially uniform vertiea'l movement for a uniform horizontal component of the movement of the upper ends of the lower levers.

6. A lifting jack comprising a base member, a pair of levers pivotally mounted at their lower ends to said base member, a pair of upper crossed levers pivotally connected at their lower endsto'the freeends of the lower pairf of levers, means fori turning said lower pair' of levers about their pivots, cam surfaces .on Vthe upper edges of said upper levers, a rest, means on said restfor supporting said rest on said' cam' surfaces, a cam surface on the lower edge of'each of said upper levers, and means on each upper lever intermediate its ends adapted to engage said cam surface on the other upper lever for supporting said upper levers, whereby'the turning of said lower pair of levers about theirrpivots will give to the rest a substantially uniform vertical movement for a uniforml horizontal component of themove'ment of the upper ends.

of the lowerlevers.

Y." A liftingk ack comprising a basev member, a pairfofxlevers -pivotally mounted at their lower ends to said kbase member, a pair of upper crossed levers-pivotally connected at their lowerends to the freefends of the lower pair of levers, means for turning said lower pair of levers about their pivots, cam surfaces on said upper levers, a rest, means on said rest for supporting said rest on said cam surfaces, a second cam surface on each of said upper levers, and means on each upper lever inter,- mediate its ends adapted to engage said second cam surface on the other upper lever for su ortinosaid un er levers whereb the pp 2D l. 7

turning of said lower pair of levers about their pivots will give to the rest a substantially uniform vertical movement for a uniform horizontal component of the movement of the upper ends of the lower levers.

8. A lifting jack comprising a base inember, a pair of levers pivotally mounted at their lower ends to said base member, a pair of upper crossed levers pivotally mounted at their lower ends to the lower pair of levers upper levers wherebyY the turning of said lower pair of levers about theirpivots will give to the rest a substantially uniform vertical inox/ementv for a uniform horizontal component of the lmovement of the upper ends of the lower levers. n

9. A lifting jackcomprising a vbase member, a pair of levers pivotally mounted at their lowerl ends to said base member, a pair of upper crossed levers pivotally mounted at their lower ends to the lower pair of levers respectively, means for turning said lower pair of levers about their pivots, means for ensuring that the lower levers turn about theirV pivots equal amounts, a rest, means on said upper crossed levers for supporting said rest,

means associated with said rest for maintaining same in a substantially horizontal position, and means on each upper crossed lever for engaging the other crossed leverfor effecting the raising of the upper ends of saidyupper levers whereby the turning of said lower pair of levers about their pivots will give to the rest a substantially uniform vertical novement for a uniform horizontal vcomponent of the movement of the upper ends of the lower levers.

' l0. fr lifting ack comprising a base member, a pair of levers pivotally mounted at their lower ends to said base member, a pair of upper crossed levers pivotally connected at their lower ends to the free ends of the lower` pair of levers, means on each upper lever 1ntermediate its ends in slidable engagement with the other upper lever for normally supporting the free ends of such levers, a rest, means on said rest in slidable engagement with the upper levers for supportingsaidrest on said upperA levers, a pair of links pivotally connected ltogether and pivotally connected respectively 'to said upper crossed levers, a depending arm extending from said 'rest havving a vertical slot therein, a pineXtending Vfrom lthe pivotal point of said pair of links and adapted to slide within said slot in said depending arm, and means for turning said lower pair of levers about their pivots.

il. A lifting jack comprising a base member, a pair of levers, each having spaced sides connected by webs, mounted at their lower en ds towsaid base member, a pair .of upper crossed levers,ieach having spaced sides connectedy by webs, lpivotally connected at' their lower endsit'o the free ends of the lower pair of levers, means o n each upper lever intermediate its ends in slidable engagement with the other upper lever for supporting the free ends .of such levers, a rest, means for supporting said rest on said upper' levers, and means for 'turning said lower pair of levers abouttheir pivots'.

i2. A lifting jack comprising a base memv ber, avpair of levers, each having spaced sides connected by webs, mounted attheir lower `ends to said base member, a pair ofA upper crossed levers, each having spaced sides connected by webs, pivotally connected at their vlower-ends to the free ends of the lower pair `-slot therein,.links pivotally mounted respectivelyon each of'said upper pair of crossed glevers,such links being pivotally-con'nected to'e'ach other, a pin extending from the pivotal; point of such links, and lextending through the vertical slots in said depending arms, and means for turning said lower pair of Ylevers about their pivots.

13. A lifting jack comprising a base member, a pair of levers pivotally mounted at their lower ends to said base member, each lever'consisting of two lever members spaced apart but rigidly connected to each other, a pair of upper crossed levers pivotally connected at their lower ends to the free ends of the lower pair of levers, each of such uppei` levers consisting of two lever members spaced aparty and rigidly connected to each other, means on each lever member of the upper levers intermediate its ends in slidable engagement with each lever member of the other upper lever for supporting the free ends of the upper levers, a rest, means on said rest in slidable engagement with each lever member of the upper levers for supporting said rest on said upper levers, and means for turning said lower pair of levers about their pivots. Y

14. A lifting jack comprising a base member, a pair ofcrossed levers pivotally mounted at their lower ends to said base member on pivots which are spaced apart, a pair of upper crossed levers pivotally connected at their lower ends to the free ends of the lower pair of levers, means on each upper leverin slidable engagement with the other upper lever for supporting the free ends of such levers, a

' rest, means on `said rest in slidable engagement with the upper levers for supporting said rest on said upper levers, means for turning said lower pair of levers about their pivots, and means associated with said lower pair of levers'for ensuring that the said levers willmove equal amounts when the meansr for turning them about their pivots is actuated.

15. Av lifting jack comprising a pair of levers pivotally mounted at their lower ends, vmeans for turning said levers about their pivots, a rest supported by said levers, and means intermediate said levers and said rest,

whereby. a substantially uniform vertical movement will be imparted to said rest for a Yuniform horizontal. component of the movement of the upper ends of said pivoted levers, such means comprisinga pair of levers pivot ally connected at their lower ends to the upper ends of the first mentioned pair of levers,

land supporting means on each upper lever in vslidable engagement with the other upper lever for slidably supporting the free end of each lever. Y y

16.' Alifting jaclr comprising a pair of levers pivotallymonted at their lower ends, each lever having spaced sides connected by webs, means for turning said levers about theirpivots, a rest supported by said levers ment of the upper ends of said pivoted levers, such means comprising a pair of levers each having spaced sides connected by webs, and being pivotally connected at their lower ends to the first mentioned pair of levers, and supporting means on each upper lever in slidable engagement with the other upper lever for slidably supporting the free end of each lever. 17. A lifting jack comprising a pair of levers pivotally mounted at their lower ends, means for turning said levers about their pivots, a rest supported by said levers, and means intermediate said levers and said rest comprising a second pair of levers pivotally connected to the other pair of levers, whereby a substantially uniform vertical movement vill be imparted to said rest for a uniform horizontal component of the movement of the upper ends of said pivoted levers.

In testimony whereof I anix my signature.

' WILLIAM H. LoLLEY.

and means intermediate said levers and said r