US1118949A - Lifting-jack. - Google Patents

Description

H. PENDLETON.

LIFTING JACK.

APPLICATION FILED MAY 11.1914. 7 1,1 18,949, Patented Dec. 1, 1914.

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- Be it known that. I, HARRY PENDLETON, a citizen of the United States of America, re siding at Columbus,i;nthe county of Frank-- lin'and State .of Ohio, have invented certain newand useful Improvementsin Lifting- Jacks, ofwhich the following is a specification. I t The preseiit'finvention relates to improvements in liftingjacks, and isdesigned particularlyforlthei purpose of providing a de vice of this character comprising comparatively few parts, which is simple, in conbe detached facility, and.

StI'L1CtlOIl-.EtI1d operation, facile'in its manipulation and: eflicient in performingyth'e functions for'which itis intended. f I The primary; object of thelinvention is the provision of a mechanically and manually operated lifting ac'k 'ofn-the step a by step type embodying among its few elements, an operating lever, which may or applied quickly :and with which is readily removable so that it may be compactly stored. with the other parts transportation'asfwell as for: storage. p v

The invention consists essentially 'in" the combination with a specially constructed pedestal of anovel form of relatively movable post and peculiarly constructed operating lever which isreadily detachable,

and in other combinations and arrangements 'of parts as will hereinafter more fully appear. I

In the accompanying drawings I have illustrated one complete example of the physical embodiment structed according to the best mode I have so far devised forthe practical application of the principles ofthe invention."

In the drawings: Figure 1 is a side elevation of the lifting jack showing the holding detent inoperative position. Fig. 2 is an edge View of-the jack as seenfrom the right in Fig. 1, the operating lever being om tted for convenience of illustration. Fig. 3 is a sectional plan view. on line 3-3 of Fig. 2.

Fig. at is a view of'the top part of the ing jack, similar to Fig. 1, but in the pres; ent figure the detent is inoperative and the I lever is lifting the slidablepost. Fig. 5 is a top plan view of the operating lever, detached from the jack.

vThere are three essentially elementalfew 'estal is adapted to engage under the oppotures to the lifting jackwviz: the standard LiFTING-JACK.

' Specification of Letters Patent. Application filed na ii, 1914.. Seria1 N0.'837,73 5.

closed by the 7,171,; Thus it hollow and slotted pair *0 comparatively, which are adapted for use as the fulcrum of of the jack for convenience in .lar. 1n *crosssection to fit neatly withinthe hollow pedestal,

of my invention oon-. 7

1S bifurcated or forked as at 13.

,mentarily. forked detent 15 is pivoted to the i V withthe lever or pedestal l; the slidable post 2 andthe operating lever3. These threedevices are separable from eachother, but theyco-act when in operative position to perform their distinct functions. The pedestal, as are also. they other parts of: the lifting jack, isof suitable metal, islhollow, andhasits sides slotted as at 4,4, The slots extend from the base 5 up to the top; of the pedestal which is crowned by a cap piece 6 whichis open or hollow, but the slots 4: in the pedestal are will be understood that the pedestal is crowned by a cap piece which extends integrally around thetop of thepedestal. Located'justbelow the cap piece 6 and projecting from one side of the pedestal is a lug 8 fashioned with-a laterally projecting bosses 9 9 theoperating lever. The pedestal-and its component parts are formed integral and the opening through the pedestal may extend from end to endthereof.

' The slidable post 2 is preferably rectanguand it will readily be understood that the post is designed to be moved relatively to the pedestal. The post is formed with a series of laterally projecting integral studs 10, 10, at each side there of, and spaced at regularintervals from the top to the bottom, and the top of the outwardly extending. wings PatentedDee. 1,1 914i.

post is crowned by a supporting block 11 as a usual.

The operating lever 3 is fashioned with a handle12 at one end, and at its opposite end A complelever above its forked end, by the pivoted side links 15, and an integral arm 16 of the detent is pivoted at 17 to a slide strap 18 which has apair of sleeves l9 embracing the lever 3 so that the strap is free to slide on the lever. 1 p

The operation of the lifting jack will be apparent from an inspection of the drawand a brief descriptionv will suffice for a clear understanding of the manipulation of the device. The operating lever is manipulated in manner similar to a crow-bar resting on the bosses 9 as a fulcrum, andthe short end of the lever, or the bifurcated end which'straddles the ped- I when the handle end is turned down as in cap "piece;

Fig. 4. lVhen the handle end of the lever is lifted up the short arm of the lever is withdrawn from the studs, but the pivoted detent is, by the same motion, pushed in under. a pair of studs and caused to slide across the top of and in contact with the cap piece 6 of the pedestal. The continued up and down movement of the lever on its fulcrum will alternately lift and hold the post as will be readily seen, the operating lever being a rigid bar, and the pivoted detent being free to move in and out of position between the studs and the top of the When it is desired to lower the jack from raised position, the lever is turned down and at the same time slightly withdrawn in order'that the short arm of the lever mayescape the studs above it and also to permit the detent to be withdrawn from under the studs which are resting upon it. In this manner the post is lowered step by step and the detent acts as an escapement just as may be readily disassociated from the jack when not being used and may be snugly packed away for storage.

I have produced a lifting jack which perform the functions and fulfils the purposes set forth as the object of the invention.

in am before described in lifting the post. The operating lever is separate from and,

, Having thusfully described myinvention,

what I claim is 1. The combinatlon in alifting jack with i a hollow, slotted pedestal having a fulcrum lever fulcrumed onthe pedestal to engage r said studs, and a'detent pivoted on said lever to co-act therewith in moving the post relative to the pedestal. f a

The combination withahollow, slotted pedestal formed with a cap piece and a post slidable in the pedestal having spacedstuds projectingfthrough at opposite sides of the slotted pedestal, of an operating lever fulcrumed on the pedestal and formed with a bifurcated short arm engagingsaid studs,

and a complementary detent pivoted on the lever co-acting with said studs and said cap piece'as described, V

In testimony whereof I afiix-my signature in presence of two witnesses. 1 a HARRY PENDLETON.

Witnesses: v

, GEORGE L. BEnRENs,

C. F; LUCK ART; v

patent may be obtained for five cent: each, by addressing the Commissioner 01 Estate,

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