US363050A - Lifting-jack - Google Patents

Description

J. A. BILL.

LIFTING JACK.

(No Model.)

N0. 363,050. Patented-May 1'7, 1887.

N PETERS. Phom-ulmaw en wmin wn. n. c,

UNiTED drains Parent @rrrcng JOSHUA ADAM BILL OF FREDERICK, MARYLAND.

LlFTING-JACK.

SPECIFICATION forming part of Letters Patent No. 363,050, dated May 17, 18187. Application filed March 14, 1887. Serial No. 230,863. (No model.)

To all whom, it may concern.-

Be it known that I, JOSHUA ADAM DILL, a citizen of the United States, residing at Frederick, in the county of Frederick and State of Maryland, have invented a new and useful Improvement in Lifting-Jacks, of which the following is a specification.

My invention" relates to an improvement in liftingjacks forvehicles; and it consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the drawings, Figure l is a perspective View of a lifting-jack embodying myimprovements. Fig. 2 is a side view of the samein another position. Fig. 3 is a horizontal sectional view taken on the line at w of Fig. 2. Fig. 4 is a similar section on the line 3 y, Fig. 2.

.A represents a vertical standard, which is provided at its lower endwith a supportingbase, B. To the upper end of the standard,oi1 opposite sides thereof, are secured plates 0, which extend above the upper end of the standard and form ears, between which is pivoted an operating-lever, D. On the front edge of the standard, at a suitable distance from the lower end thereof, is aseries of ratohet-teeth,E.

F represents a vertically-movable bar,which is arranged on one side of the standard A, and 18 provided near its upper end with an arm, G,which extends rearward] y across one side of the standard A,and has its rear end bent inward at right angles and caused to engage a Vertical slot, H, which is made in one side of the standard. A vertical slot, l, is made on the front edge of one of the plates 0, to permit the arm G to extend between the same and the end of the lever D by means of links N. On the front edge of the bar F, at a suitable distance from the lower end thereof, is a vertical series of ratchet-teeth, O.

1? represents a bracket, which has its rear end bifurcated to receive the bar F, and from the'lower side of the said bracket depends a detent, R, which forms a pawl and is adapted to engage the ratchet-teeth O. I

S represents a pin,which connects the blfurcated rear end of the bracket and. extends across the rear side of the bar F, and works in a vertical groove or recess, T, with which the said bar is provided.

A fiat spring,U,- is secured to the inner edge of the standard A, and extends outwardly to Ward the opposing inner edge of the bar F and bears against the said bar, the function of the said spring being to normally move the bar F a slight distance from the standard A, so as to prevent the ratchets K from engaging the ratchet teeth E.

The operation of myinvention is as follows: In order to raise one end of the axle of a vehicle to remove the wheel therefrom, the operator inserts the front end of the bracket P under the said axle, having previously raised the bracket to a suitable point 011 the bar F. He then bears down on the free end of the lever D,which causes the bar F to rise and carry the bracket with it, and thus raise the axle of the vehicle. The weight of the vehicle causes the bar F to move toward the standard A against the pressure of the spring U, so that when the bar F has been raised a suit-able dis tance its ratchet-teeth K become engaged with the ratchet-teeth E on the standard, and thus the bar F is locked in position and holds the axle of the vehicle when elevated. In order to lower the axle, the operator places one foot on the outer end of the foot-bar M, thereby causiug the lower end of the bar F to recede from the standard A and disengage its teeth from the teeth of the said standard,when the lever D is free to move upwardly and cause the bar F and the bracket to descend.

By providing the vertically-moving bar F with the ratchet-teeth O, and the verticallymovable bracket 1? having the detent to en- 2 i eeaose gage the said teeth, the said bracket may be adjusted to the necessary height on the bar F in a very short space of time.

Having thus described my invention, I claim-- 1. In a lifting-jack, the combination of the standard having the teeth E, the lifting'bar movable vertical] yand adapted toswin g toward and from the standard, and having the teeth K to engage the teeth E, the spring U, to normally move the lifting-bar out of engagement with the standard, and the lever to raise and lower the lifting-bar,substanti ally as described.

2. The combination, in a liftingjack, of the vertical standard A, having the ratchet-teeth E on one edge near its lower end, the lever D, fulcrumed to the upper end of the standard, the vertically-movable bar F, connected to the lever and having the teeth K, to engage the teeth of the standard when the bar F is raised,

and the bracket P, secured to the bar F, substantially as described.

3. The combination, in a lifting-jack,of the standard A, having the teeth E near its lower end, the lever D, fulcr'umed to the upper end of the standard, the vertieally-movable liftingbar F, connected to the lever and provided at its lower end with theteeth K, adapted to engage the teeth E, (when the bar F is raised,) the footbar M, projecting from the bar F, and the spring U, to normally move the lower end of the bar F from the standard A, for the purpose set forth, substantially as described.

In testimony that I claim the foregoing as my own Ihave hereto affiXed my signature in presence of two witnesses.

JOSHUA ADAM DILL.

Witnesses:

G. M. D. CLABAUGH, RICHARD O. HAGAN.

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