US378001A - Adjustable vehicle-jack - Google Patents

Description

(No Model. I

L. B. GIPFORD.

ADJUSTABLE VEHICLE JAGK. .No. 378,001. Patented Feb. 14, 1888.

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UNIT D STATES PATENT OFFI E- LORD B. GIFFORD, OF TOLEDO, OHIO.

ADJUSTABLE VEHICLE-JACK.

SPECIFICATION forming part of Letters Patent No. 378,001 dated February 14, 1388.

Application filed August 24, 1887. Serial No. 247,782. (No model.)

To aZZ whom it may concern:

Be it-known that I, LoR'n BYRON GIFFORD, acitizen of the .United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented new and useful Improvements in Adjustable Vehicle-Jacks, of which the following is a specification.

My invention relates to improvements in lifting-jacks for wagons, carriages, and other vehicles; and the objects of myimprovements are to construct a light, simple, cheap, and durablejack, and one also that may be easily and quicklyv adjusted to any desired height.

I design to construct the jack wholly of iron, or part of iron and part of wood. I accomplish these objects in the manner hereinafter described, and shown in the'drawings hereto annexed, in which- Figure 1 is a perspective View of the jack complete; Figs. 2, 3, 4, 5, and 6 are enlarged detail views of the various parts; and Fig. 7 is a transverse section, taken about midway of Fig. 1, showing the tracks, in which like letters of reference refer to like parts throughout the several views.

A A are two side bars, which, togetherwith the two base-pieces B B and the two braces C 0, form the frame-work of the jack, which parts are secured together by bolts.

D D are two right and left ratchet-bars, each of which is provided with an internal track, 6 e, and a slot, d 1, such bars having the usual beveled teeth, J, to form the ratchets. These bars are secured together and also between the side bars, A A, so as to receive a sliding motion by the pivots'or bolts in the slots at a and d d.

E is a lever, to which is secured two angular fulcrum-plates, F F, provided with branches f f, said'fulcrum-plates being pivoted to the ratchet-bars D D through the slots a a, and the branches ff pivoted to two connectingarms, G G, the lower ends of which are provided at their lower ends with lateral pivotpins 9, Fig. 6, which have a bearing in the frame A A and project into the slots d d, Fig. 3, of the ratchet-bars D D, thereby holding the lower ends of the bars in proper position between the frames A A, while permitting the bars to be raised and lowered. Thus by forcing the lever E down the ratchet-bars D D are raised, and by raising the lever E the ratchetbar is lowered. H is an adjustable support side come in line, the weight lift-ed remainssuppo'rted until the pivots on the branchesff and the arms G G are forced out of line with the pivot above and below it.

Having described my invention and the manner ofits operation, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the frames A, thetwo vertical ratchet-bars D, arranged side by side between the frames and each having an internal vertical trackway, e, a support, H, extending between the ratchet-bars and having a T-head, h, engaging the internal tracks of said bars, and a lever for raising the latter, substantially as described.

2. TilQCOlXlbllJittiOD of the frames A, the two vertical ratchet-barsD, arranged side by side between the frames and each provided with an internal vertical track, 6, and a slot, d, near its lower end, a support, H, extending between the ratchet-bars and having aT-head,

the said slots of the ratchet-bars, and a lever,

E, connected withthe upper portions of the ratchet-bars and having a pivotal connection with the upper ends of the fulcrum-arms, subst-antial] y as described.

3. In a lifting-jack for vehicles, the combination of the side bars, A A, base-pieces B B, braces O C, ratchet-bars D D, support H, conneoting-arms G G, fulcrum-plates F F, having branches f f, and lever E, arranged and operated as described and specified.

In testimony whereof I havehereunto set my hand in the presence of two subscribing witnesses.

LORD B. GIFFORD.-

Witnesses:

JOHN T. GREER, J osEPH N. (house.

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