US1318801A - ripsch - Google Patents

Description

C. W. RIPSCH.

LIFTNGJACK.

APPLICATION man :1111.13.1919.

3 SHEETS-SHEET l.

C. WI RIPSCH.

L'IF'HNG JACK.

APLxcATloN man 1,111.13. 1919. 1,318,801 Patented 001.1411919.

' 3 sHEETssHET 2.

|Q /5 HI if IN VEN TOR. CWA/w55 m P/Psc/ ATTORNEY C. W.V RIPSCH.

LIFTING JACK.-

APPLICATloN FILED JAN. 13. 191s.

Patented 061111919.

3 SHEETS-SHEET 3.

I N V EN TOR. Cxmfs M ffmc/f ATTORNEY g UNITED sTATEs PATENT OEEIOE.

CHARLES w. RIrscH,

or DAYTON, OHIO, AssIGNoR To THn'eJoYcn-CRIDLAND co., 0F DAYTON, OHIO, A CORPORATION OF OHIO.

LIFTING-JACK.k

- lSpeciiication of LetteisPatent. i. Patented 0017;. 14, 1919.

Application filed. January 13, 1919. I Serial No. 270,824.

To all whom t may concern Be it'known that I, CHARLES W. RIrsoH, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Lifting-Jacks, of which the followingpisa specification, reference being had therein tothe accompanying drawing.

This inventionrelates to lifting jacks and,

more particularly, to screw-operated jacks.

The object of the invention is to provide a lifting jack vwhich will be simple' and com` pact in its construction and easy of Operation, and, to this end, it is a further object of the invention to provide such a lifting jack in which there will be neither gears or other connecting devices interposed between the operating member, or lever, and the screw.

It is also an obj ect of the invention to pro` vide such a jack with devices for positively operating the same to either raise or lower the load; the devices being so constructed and arranged that when one of them is oper.`

atedthe other will be automatically moved into an inoperative position.

It is also an obj ect of the invention to provide a jack comprising a vertically arranged lifting screw and having the operating lever arranged in a vertical plane and connected with the screw without the use of gears. 'Other objects ofthe invention will appear as the mechanism is described in detail. l

I n the accompanying drawings Figure 1 is 'a vertical sectional 'view` of a jack embodying my invention taken on the line 1-1 y mounted 'on thescrew. AAshere shown the of Fig. 3i; Fig. 2 is a side elevation of such a jack partly in section; Fig. 3 is a transverse sectional view taken' on `the line 3--8 of Fig. l; and Fig. t is a top with the capk removed. K

In these drawings I haveV illustrated onel embodiment of the invention and haveV shown the same as applied to a screw-operated ack in which the screw isY heldV against longitudinal movement and serves to yoperate a lifting member which comprises a nut thereon and preferably formed integral therewith a housing 2, the Vupper portion of which, 3, is tubular in form and,y constitutes a hollow standard, while the lower portion is enlargedto receive within the same parts plan view of the jack i of the operating mechanism. Supported on the base l and extending vertically therefrom, -within the hollow standard 3, isa screw 4 the upper end of which, in the present 1nstance,`extends slightly beyond the upper end of the hollow standard. RigidlyV secured to this screw isa toothed actuating member 5 which isV here shown in the form of `a lratchet wheel, the teeth of which are so shaped'that each of them may be operatively engaged on either side by an Operating dog or pawl.v In the construction here shown the screw has a portion extending downwardly beyond the threads thereof, into an opening in the toothed member 5, which is held agalnstrotation relatively to said screw. A collar 6 rigidly secured to the screw below the threads thereof, rests'upon the toothed member 5 andserves to limit the downward movement of the screw and to form -a firm support therefor. The toothed actuating member 5 rests upon the top plate 7 of a ball bearing, which is mounted on the base 1 within the 'housing 2. The lower surface of the ytoothed actuating member is preferably arranged to receive the plate, and the two parts may, `if desired, be rigidly connpected one to the other. Mounted upon the screw, within the hollow standard, is a nut 8, which is held against rotation, and to which Alongitudinal movement is imparted by the rotatory movement of the screw. The nut may be held against rotation in any suit-y able manner. In the present instance it is guideway formed in` the housing 2 and standard 3. les here shown, that part of the guideway which is formedin the Vlower part of the housing comprises two inwardly-extending ribs 10 spaced apart to receive the' lug 9 between them, and that part of the guideway which is formed in the reduced upper portion of the housing, or hollow standard, is in the form of an outwardly-ex tending channel 11 which forms a continuation of the space between the ribs 10 in the lower part of, the housing. The upper part of this guideway is offset, as shown at l2, so that a' solid'wall is interposed in thepath of the lug 9 to limit the Outward movement of the nut and prevent the same being accidentally moved beyond the end of the screw. To remove the nut from the housing it must be vmanipulated to cause the lug to move laterally -through the offset portion of theguideway and then outward beyond the end of the standard. Preferably, the nut is of a relatively short length and has secured thereto a lifting member 13 which travels with the nut and serves to raise and lower the load. In the present construction, this lifting member is in the form o-f a sleeve surrounding the screw and slidably mounted within the hollow standard, the lower end of the sleeve being screw-threaded onto the nut and the upper end of the sleeve extending slightly beyond the end of the screw when the nut is in its lowermost position. The inner wall of the hollow standard may, if desired, be cut away for a portion of its length so as to reduce the frictional contact between the standard and the lifting member. As here shown, the upper portion only of the hollow standard is in contact with the lifting member. Mounted ont-he outer end of the lifting member is a cap or work-engaging member 14.

Movement is imparted to the actuating member 5 and the screw by means of operating devices arranged on opposite sides thereof and, as here shown, comprising dogs or pawls adapted to engage and operate the actuating member and operatively connected with levers, the two pawls being so arranged that when one lever is manipulated its pawl will turn the actuating member in one direction to raise the load, and when the other lever is manipulated its pawl will turn the actuating member in the opposite direction to cause the load to be lowered. By causing the pawls to directly engage the toothed actuating member all gearing and all other.

intermediate parts are eliminated and the operating levers are caused to act directly upon the rotatable member of the lifting mechanism. v The two operating mechanisms are identical in construction and arrangement with the exception that, as stated, the dogs or pawls are reversed. In the present construction each operating mechanism is mounted within a supplemental housing 15 which is rigidly secured to the adjacent side of the main housing 2 and has an opening through which the lever 1G projects. The levers are preferably of the bell crank type and have their ends extending into the respective housings, where each lever is pivotally mounted on a pill 17 WllCll S SUP" ported at its outer end in the wall of the supplemental housing 15 and at its inner end in the wall of the main housing 2. The lower end of the lever is provided with a guideway to receive the dog or pawl and, in the present instance, this guideway is in the form of an aperture 18 extending through the lever and in which the pawls 19 and 2O are slidably mounted. The wall of the main housing is cut away adjacent to the edges of the actuating member 5 to form slots 21 and permit the pawls to engage the respective sides of the actuating member. The pawls in the present instance are each provided with two teeth but, obviously, any suitable number of teeth may be used. Each pawl is caused to yieldingly engage the toothed actuating member by means of a spring 22 which is mounted in a socket 23 in the outer end or' the pawl, the outer end of which bears against the closure for the guideway or aperture 18. This closure may be of any suitable character but, in the present instance, the guideway extends entirely through the lever and is closed at its outer end by a plate 24 which bears against an inwardly extending projection or rib 25 formed on the outer wall of the supplemental housing 15, this rib being so arranged as to permit the closure plate 24 to move with the end of the lever as the latter is actuated. The pawls are held against rotatory movement, and their longitudinal movement is limited, by means of stops 26 which are screw-threaded into the ends of the respective levers and project into grooves 27 formed in the pawls.

It will be apparent that when one of the levers is operated the pawl carried thereby will be moved transversely to the axis of the screw, and will be caused to engage the teeth of the actuating member 5 and thus impart rotation to the screw. The first movement of the actuating member causes the pawl carried by the other operating lever to be moved rearwardly out of engagement with the actuating member, in which position it is retained by means of a detent, which is here shown as comprising a springactuated ball 28 which, when the lever is in its fully retracted position, is seated in a cavity 29 formed in the side of the main housing 2.

lVhile I have shown and described one embodiment of the invention, I wish it to be understood that I do not desire to be limited to the details thereof, as various modifications will occur to a person skilled in the art.

Having now fully described by invention, what I claim new and desire to secure by Letters Patent, is:

l. In a lifting jack, a screw, a nut mounted on said screw, one of said elements being rotatable, a single actuating member secured to said rotatable element, and operating devices arranged on opposite sides of said actuatingmember and each having a part arranged to directly engage said actuating member, said engaging parts being| so arranged that the manipulation of one of said operating devices will rotate said actuating member in one direction and the manipulation of the other of said operating devices will rotate said actuating member in the opposite direction.

2. In a lifting ack, a screw, a nut mounted on said screw, one of said elements being rotatable, a single actuating member secured to said rotatable element, and operating devices arranged on the opposite side of said actuating member and each having a pawl to engage saidgactuating member to rotate said rotatable element, said pawls beingvar.- ranged to rotate said element in opposite directions. i

. 3. In a lifting ack, a screw, anutmounted on said screw, one of said elements being rotatable, an actuating member secured to said rotatable element,a pair of levers, and a part carried by each of said levers and adapted to engage said actuatingniember, said engaging parts beingI so arranged that the manipulation of one leverwill rotate said 4actuating member in one direction and the manipulation of the other lever will rotate said actuating member in the opposite direction. Y y v 4f. In a lifting jack, a screw, anut mounted on said screw, one of saidv elements being rotatable, atoothed actuating member se-k cured to said rotatable element, a pair of levers',`a pawl carried by each of said levers and arranged to engage said toothedactuating member, said pawls having their teeth facing in opposite directions about the circumference of said actuating member, whereby the manipulation of one of said levers will rotate said actuating member in one direction and the manipulation of the other lever will rotate said actuatingmembei' in the opposite direction. v

5. In a lifting jack, a screw, a nut mount-4 edon said screw, one of said elements being rotatable, a toothed actuating member se-V cured to said rotatable element, a pair of levers, each of said levers having a guideway extending transversely tothe axis` of said rotatable element, and a pawl yieldably mounted in each of said guidew'ays and adapted to engage said toothed actuating member, said pawls having their teeth so arranged that the manipulation Vof one of said levers will cause said actuating` ,member to be rotated in one direction and the manipulation of the other of said levers will cause said actuating member to lbe rotated -in the oppositedirection. Y Q i 6. Ina lifting jack, a. screw, ainutmounted on said screw, oneof said' elements being rotatable, a toothed actuating member ysecured to said rotatable element, a lever pivotally mounted yalongside of saidfmenn ber on an axis extending transversely to the axis thereof and having a guideway Vextend-v ing transversely to the axis of said rotatable element, and a pawlr yieldablyfinountedjin said guideway and arranged toV engage4 the lever is manipulated. n l i 7. In a lifting Jack, a screw, a nut mountteeth of said actuating'member whensaid ed on said screw, one of said elements being rotatable, an actuating member secured to Vsaid rotatable element, operating devices arranged on opposite sides of said actuating member and each having a part cooperating vwith said actuating member to impart rotary movement to said `rotatable element, said par-ts of the two operating devices being se arranged that one` operating device will move said rotatable element in one direction and the other operating device will move said rotatable element in the opposite direction, those parts of said operating devices which engage said actuating member being so arranged that the operation of one of said operating devices will cause the other to be moved into an inoperative position with relation to said actuating member. y

8. In a lifting ack, a rotatable screw held against longitudinal movement, a lnut mounted on said. screw and heldagainst rotation therewith, a lifting member connected with said nut, a single actuating member secured to said screw, and operating devices arranged on opposite sides of said screw and having parts directly engaging saidactuating member to rotate said screw in opposite directions. y

9. In a lifting ack, a rotatable screw held against longitudinal movement, a nut mounted on said screw and held against rotation therewith, a lifting member connected with said nut, an actuating member secured to said screw, and .operating devices arranged on opposite sides of said screw and vcoperating, respectively, with said actu ating member to rotate said screw in opposite directions, said operating devices being sov arranged that the operation of one of them will cause the other to be moved outI of engagementy with said actuatingV mem-- ber.' y y 10.In a lifting jack, a rotatable screw held against longitudinal movement, a nut mounted on said screw and held against rotation therewith, a lifting member connected with said nut, anractuating member secured to said screw, levers mounted on the opposite sides: of ysaid screw, on an axis extending transversely to the axis of said screw each lever having a part extending beyond its tion,` and thel manipulation ofthe other levern will, rotate saidscrew in the opposite direcy o tion.Aw

1l. In lifting jack, a rotatable screw held against longitudinal movement, a nut.

mounted on saidl screw and held against rotationtherewith, a-lifting member connect.-

ed with said nut, a toothed actuating member rigidly secured to said screw, a lever pivotally mounted on each side of said screw,

each lever having a guideway extending transversely to the axis of said screw, and a pawl yieldably mounted in each guideway and arranged to engage said toothed actuating member when the respective levers are manipulated, said pawls being arranged, respectively, to move said actuating member in opposite directions.

12. In a lifting jack, a rotatable screw held against longitudinal movement, a nut mounted on said screw and held against rotation therewith, a lifting member' connected with said nut, a toothed actuating member rigidly secured to said screw, a lever pivotally mounted on each side of said screw, each lever having a guideway extending transversely to the axis of said screw, and a pawl yieldably mounted in each guideway and arranged to engage said toothed actuating member when the respective levers are manipulated, said pawls being arranged, respectively, to move said actuating member in opposite directions, and being also so arranged that the manipulation of one of said levers will cause the pawl of the other lever to be moved out of engagement with said actuating member.

13. In a lifting jack, a rotatable screw held against longitudinal movement, a nut mounted on said screw and held against rotation therewith, a lifting member connected with said nut, a toothed actuating member rigidly secured to said screw, a lever pivotally mounted on each side of said screw, each lever having a guideway extending transversely to the axis of said screw, and a pawl yieldably mounted in each guideway and arranged `to engage said toothed actuating member when the respective levers are manipulated, said pawls being arranged, respectively, to move said actuating member in opposite directions, and being also so arranged that the manipulation of one of said levers will canse the pawl of the other lever to be moved out of engagement with said actuating member.

1st. In a lifting jack, a rotatable screw held against longitudinal movement, a nut mounted on said screw and held against rotation therewith, a lifting member connected with said nut, a toothed actuating member rigidly secured to said screw, a lever pivotally mounted on an axis extending transversely to said screw and having a part extending beyond its axis, and a pawl yieldably mounted on said part of said lever and adapted to engage said actuating member to rotate said screw. y

15. In a lifting jack, a rotatablerscrew held against longitudinal movement, a nut mounted on said screw and held against rotation therewith, a` lifting member co-nnected with said nut, a toothed actuating member rigidly secured to said screw, a lever pivotally mounted on an axis extending transversely to said screw and having a part extending beyond its axis, said part of said lever having a guideway, a pawl mounted in said guideway, and means to hold said pawl yieldably in engagement with said actuating member when said lever is manipulated.

16. In a. lifting` jack, a rotatable screw held against longitudinal movement, a nut mounted on said screw and held against rotation therewith, a lifting member connectedv with said nut, a toothed actuating member rigidly secured to said screw, a lever pivotally mounted on an axis extending transversely to said screw and having a part extending beyond its axis, said part of said lever having an aperture therein extending transversely to the axis of said screw, a pawl slidably mounted in said aperture, and a spring arranged within said aperture to hold said pawl yieldably in engagement with said actuating member.

17. In a lifting jack, a base, a housing carried by said base and having a tubular portion forming a standard, a screw rotatably mounted on said base and extending through said standard, a ratchet wheel secured to said screw, a nut mounted on said screw within said standard and held against rotation relatively to said screw, a lifting mem-ber connected with said nut and extending beyond the end of said standard, a supplemental housing secured to the side of said first-mentioned housing, a lever pivotally mounted within said supplemental housing, and a pawl carried by said lever within said supplemental housing for imparting rotatory movement to said screw when said lever is manipulated.

18. In a lifting jack, a base, ahousing carried by said base and having a tubular portion forming a. standard, a screw rotatably mounted on said base and extending through said standard, a nut mounted on said screw within said standard and lield against rotation relatively to said screw, a lifting member connected with said nut and extending beyond the end of said standard, an actuating member secured to said screw, a supplemental housing mounted on one side of said first-mentioned housing, aI lever pivotally mounted within said supplemental housing and having a guideway extending transversely to said screw, and a pawl yieldably mounted in said guideway to coperate with said actuating member to rotate said screw'. 1

19. In a lifting jack, a base, a housing carried by said base and having a tubular portion vforming a standard, a screw rotatably mounted on said base and extending through said standard, a nut mounted on said screw within said standard and heldv against rotation relatively to said screw, a lifting member Connected with said nut and extending beyond the end of said standard,

an actuating member connected with said screw, a supplemental housing mounted on one side of the first-mentioned housing, a lever pivotally mounted within said housing and having an aperture extending transversely to the axis of said screw, a plate seated on said lever to close the end of said aperture, said supplemental housing having a rib to engage said plate and hold the same in place when said lever is manipulated, a pawl slidably mounted in said aperture, and a spring confined between said pawl and said plate to hold Asaid pawl yieldingly in engagement with said actuating member.

20. In a lifting jack', a base, a housing carried by said base and having a tubular portion forming a standard, a screw rotatably mounted on said base and extending through said standard, a nut mounted on said screw within said standard and held against'rotation relatively to said screw, a lifting member connected with said nut and extending beyond the end of said standard, an actuating member connected with said screw, a supplemental housing arranged on each side of the first-mentioned housing, a lever pivotally mountedY in each supplemental housing, each lever hc ving a part extending beyond the axis thereof and provided with a guideway, and a pawl mounted in each guideway, and means for holding said pawls yieldingly in engagement with said actuating member when the respective levers are manipulated. n f Y 21. In a lifting jack, a ibase, a housing carried by said base and having a tubular portion forming `a standard, a screw rotatably mounted on said base and extending through said standard, a nut mounted on said screw within said standard and held against rotation relativelyto said screw, a lifting member connected with said nut and extending beyond the end of said standard, an actuating member connected with said screw, a supplemental housing arranged on each side of the first-mentioned housing, a lever pivotally mounted vin'each' supplemental housing, each lever having a part extendingbeyond the axis thereof and provided with 'a guideway, and a kpawl mounted in each guideway, means for holdingv said pawls yieldingly in engagement with said actuating member when the respective levers are manipulated, and a detent carried by each lever toy hold the same in an inoperative position.

22. In a lifting jack, a base, a housing extending upwardly from said base andhaving a tubular portion forming` a standard, a th'rust bearing mounted on said base within said housing, a ratchet wheel mounted onk said bearing, a screw mounted on said ratchet wheel and rigidly secured thereto,

Y lifting member actuated by said screw, an

operating lever mounted for movement in a vertical plane, an actuating part carried by said screw, and a part carried by said lever to engage said actuating part on said screw and impart rotatory movement to said screw. y Y 24. In a lifting jack, a screw, a nut mounted on said screw, one of Said elements being rotatable, an actuating member secured to said rotatable element, levers mounted on opposite sides of said actuating member-for movement about axes extending transversely to v'the Vaxis of saidrotatable member, and parts connectedY with said levers to cause said actuating member to be rotated in opposite directions by therespective levers.

25. In a lifting jack, a screw, a nut mounted on said screw, one of said elements being rotatable, a toothed actuating member secured to said rotatable element, levers mounted at opposite sides of said actuating member for movement about axes extending transversely to the axis of said rotatable member, and pawls mounted on said levers to cooperate with said toothed actuating member, said pawls being so arranged that the manipulation of one lever will rotate said actua-ting member in one direction and the manipulation of the other lever will rctate said actuatingmember in the opposite direction.

26. In a. lifting ack, a screw, a nut mounted on said screw, one of said elements being rotatable, a toothed actuating member secured to said rotatable element, a lever pivotally mounted on each side of said screw, each lever having a guideway extending transversely to the axis of said screw, and a pawl yi'eldably mounted in each guideway and arranged to engage said toothed actuating member when the respective levers aremanipulated, said pawls being arranged respectively to move said actuating member in Y opposite directions,

Intestimony whereof, I affix my signature hereto.

cuantas w. RirscH,

Copies of this patent may be obtained for five cents each, by addressingl the Commissioner of Patents,

Washington, 1).,0. l

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