US235179A

US235179A - Ezra e

Info

Publication number: US235179A
Authority: US
Publication date: 1880-12-07
Anticipated expiration: 1897-12-07

Description

E. B. TOPE. Lifting Jack.

(Model.)

No. 235,179. Pate ted' Dec. 7,1880.

Min/e5 ses ILFETERS, PHOTO-UTHOGRAPHER. WASHINGTON D C UNITED STATES PATENT OFFICE.

EZRA E. TOPE, OF TIPPEOANOE, OHIO.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 235,179, dated December '7, 1880.

Application filed October 12, 1880. (Model.)

To all whom it may concern:

Beit known that I, EZRA E. Torn, a citizen of the United States, residing at Tippecanoe, in the county of Harrison and State of Ohio,

5 have invented certain new and useful Improvementsin Lifting-Jacks; and Ido 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 rise the same, reference being had to the accompanying drawings, a l to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to wagon-j acks and it consists in the construction and arrangement of the several parts hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of a jack constructed according to my invention. Fig. 2 shows the connecting-link between the lever and the lifting-bar, and Fig. 3 shows the lifting-bar.

a is the base, into which are set the lower ends of two "ertical side bars, a a, held together at their tops by the single cross-bolt 61 These form a substantial frame for holding the other mechanism.

b is the lifting-bar, which is placed between the side bars, a a, and slides vertically. It is 0 provided with a longitudinal slot, b, which extends nearly its whole length, and the single bolt, a passes through it, as shown. On one edge it is provided with ratchet-teeth b and projecting downward from the center of 3 5 its lower end is the arm b 0 is the hand-lever for lifting the bar b. It is pivoted near the lower end and between the side bars, a a. It may, when desired, be pivoted at higher points on a bolt put through one of the series of holes a formed through the side bars, a c. The end 0 of this handlever 0 projects through the side bars, a a, and is connected to the lower end of rear side of the lifting-bar b by a short pitman or arm,

5 d. The pitman is so connected to the sliding bar I) that the short arm b will come in contact with its front edge and prevent the lower end of the sliding bar from turning outward from its place between the vertical posts a a.

To the hand-lever, and in front of the sliding bar, I place the pawl c, which is arranged to engage in the ratchet-teeth L The pawl is held in position against the teeth I) by a spring, f, fixed on the lever c, as shown.

g is a rod having one end attached to the pawl 6, while the other end is carried back along the hand-lever c to a point where it can be easily got hold of by the hand when it is desired to release the pawl e from its hold in the teeth D The operation of this jack is very simple. By pressing down on the handle 0 the bar I) is made to rise and lift any weight that may be resting on its top. The pawl engages in the teeth I) and holds the bar b at any height to which it may have been lifted. To let the bar or post 1) down it is only necessary to press the handle down slightly and draw the pawl back by the rod 9, after which the weight can be lowered.

In this device I have but a single bolt, o to retain the bar I) in place between the side bars, a. The lifting-bar is guided at its lower end and kept in place by the projection b which bears against the connecting-arm d.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

The combination of the supportingframe having guide-pin a near its upper end, the lever c, pivoted in the frame so that its end 0' projects outward, as shown, the pawl e, the connecting-link d, the pawl and link being pivoted to the lever c and arranged on opposite sides of the supporting-frame, and the slotted lifting-bar I), having ratchet-teeth b said bar being placed in the frame and on the pin a, and furnished with an arm, b projecting downward from its lower end, and having its lower end pivoted to the upper end of the link (1, with the arm I) resting against the side of the said link, substantially as set forth.

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

EZRA E. TOPE.

Witnesses:

W. H. LATTO, M. T. BILLINGSLY.