US253964A - Lifting-jack - Google Patents

Description

(N o Model.) I I v v H; J. WILSON.

LIFTILIG JAGK.

Patented Feb. 21,1882.

UNITED STATES PATENT OFFICE.

HIRAM J. WILSON, OFMASON, MICHIGAN.

LlFTlNG-JACK.

SPEGIFTCATION forming part of Letters' Patent No. 253,964, dated February 21, 1882, Application filed December 22, 1881. (No model.)

To all whom it may concern 7 Be it known that I, HIRAM J. WILSON, a citizen of the United States of America, residing at Mason, in the county ofIngham and State of Michigan, have invented certain new and useful Improvements in Lifting-Jacks for Carriages; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

In the drawings, Figure 1. is a perspective of a lifting-jack embodying my invention, and Fig. 2 is a modification thereof.

Like letters of reference refer to like parts.

The object of my invention is to provide a liftingjack which is simple in construction, strong and serviceable, and adapted to be used to liftcarriage-axles and other heavy objects which are or may be at different elevations from the ground.

My invention consists in'various details of construction and combinations of elements, hereinafter more fully described", and specifically set forth in the claims.

Upon a suitable base, A, is secured by bolts a two upright wrought-metal bars, B, which run parallel to each other for a distance and are then bent or spread apart to give firmness against lateral pressure, and bent at an angle to form feet I). At the point of departurefrom parallel lines a brace, b, is inserted between the bars, and they are firmly bound together by a rivet or bolt, W, said brace being extended and secured to the baseA by a bolt, b At the upper end of the bars B a bolt or rivet, 0, serves to bind them together, and as a pivotal bearing for the handle or main lever G, which passes between them.

At the end of the main lever are pivotally secured two parallel bars, D, forming a link, the bolt or rivet 0 serving to bind the handle and bars together and also as a pivot. The lower end of the bars D are in like manner secured to a catch-bar, F, which passes between tween them, so long as no pressure or weight is applied to orsustained by the end of bar F, to which the links D'are attached, whereby the catch-bar may be elevated by means of the lever 0, but cannot be depressed by said means or any other, except the application of weight orpressure downwardly upon the rear end of bar F, and this only so long as said pressure is continued. Hence the catch-bar may be intermittently or continuously elevated by the lever O, and it may be continuously or intermittently depressed, as just described.

Between the bars D passes a supporting-bar, E, provided with front and rear pins, e 0, arranged in like manner as are pins ff, and for a similar purpose-via, to permit a change of *"the location of bar E and a firm retention of the same in any desired locality, whereby the same may be set to reach objects of different elevations.

It is evident that instead of two bars, D, a

single bar may be used and the supporting-bar constructed to fit loosely thereon, as shown in Fig. 2. Furthermore, said bar D may be bent at substantially a right angle to the rear and pass between the'uprights B to serve as a catch-bar, in which case I provide an ordinary dog or ratchet, F, and notch the uprights, as at f the pinsf andf serving merely to retain the bent bar D within the bars B, in which case the continuous upward movement of the bent bar D is effected by means of the main lever (3, while its continuous or intermittent downward movement is effected by means of the removal and entrance of dog F from and into notches f Again, it is evident that in this modification the two bars D may be connected to a separate check-bar, as at Fig. 1,

and the dog F may then be used, if desired.

The operation of my invention is as follows: The supportingbar E is adjusted to such a height as willbring it immediately under and against the carriage-axle or other body to be elevated, and by applying slight weight or pressure upon its outer end it is solidly retained at such point. Force is now applied downwardly upon the free end of the main lever 0 and the load is lifted, the catch-bar rising with the link D, and when it is desired to sustain the load in an elevated position the force is released or removed from the main lever, when the pins ff bind upon the front and back edges respectively of the uprights B B, and to lower the load it is necessary to simply apply force downwardly upon the free end of the catch-bar. Where the modified form shown in Fig. 2 is used-viz., the dog Fthe operation is the same, except that in lowering the load force is applied to the free end of the dog F in an upward direction. In either modification it will be seen that in the application of force intermittently to lever E the catchbar promptly follows and acts unerringly to quickly sustain the load at any point in the principal figure, and at stated points in the modification.

It will be observed that the construction shown permits the use of ordinary merchant iron of suitable width and thickness, which, with a very slight amount of forging and a few bolts, also readily obtained in trade, renders the entire instrument of remarkable strength, though of reduced cost in material required and labor involved in its manufacture.

Having described myinvention, what I claim as new, and desire to secure by Letters Patent, 1s-

1. In a lifting-jack, the combination of a slotted upright, a slotted link, an operating-lever, and a supporting-bar and a catchebar, each of the latter provided with pins adapted to bind upon the front and back edges of their respective eoacting members, substantially as shown and described.

2. The combination of the parallel upright straps B B, bound laterally at 1) against the brace 1) between them, the handle G, pivotally secured therein at c, and pivotally secured between two links, D D, the supporting-bar E, provided with the pins 6 c, and means, substantially as shown and described, for securing said links in desired positions, substantially as and for the purpose set forth.

3. In a lifting-jack, the combination of links D D, supporting-bar E, provided with pins 6 e, and catch-bar F, provided with pins ff, substantially as shown and described. I

In testimony whereof I have afiixed my signature in presence of two witnesses.

HIRAM J. WILSON.

Witnesses Jim. 0. Sonrnns, LANGDON B. Bron.

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