US690128A - Lifting-jack. - Google Patents

Description

No. 690,128/ Patented Dec. 3|, I9Dl. C. E. ARCHIBALD.

LIFTING JACK.

(Application filed Apr. 13, 1901.)

(No Model.)

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NiTn) STATES PATENT @FFicE.

CHARLES EDWIN ARCHIBALD, OF GIRARD, PENNSYLVANIA.

LlFTlNG-JACK.

srncrrrcacrron forming part of Letters Patent No. 690,128, dated December 31, 1901.

Application filed April 13, 1901. Serial No. 55,714. (No model.)

To ctZZ whom zit may concern:

I Beit known that 1, CHARLES EDWIN ARCHI- BALD, a citizen of the United States, residing at Girard, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Lifting-Jacks; and I do 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 drawlugs, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in lifting-jacks, which will be hereinafter more fully described, and then specifically defined in the appended claims, and are clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this application, in which drawings similar letters of reference indicate like parts in the views, and in which Figure 1 is a perspective view of the improved lifting-jack. Fig. 2 is a central longitudinal sectional view through the jack, parts being shown in side elevation. Fig. 3 is an enlarged detail view of the operatinglever, and Fig. 4c is an enlarged detail view of the pendent link and locking attachment.

Reference now being had to the details of the drawings by letter, A'designates the base of the standard, the latter comprising two upright planks B, with a slight space intervening, in which space the longitudinally-movable bar 0 and the handle D operate. This bar Chas alongitudinal slot O therein,which extends substantially the length of the bar, and the upper end of the bar is stepped, as shown, forming a rest for the axle of the vehicle or other object which is to be raised by the jack. Said operating-lever D is bifurcated, as shown, and at its solid end is provided with a handle, while its other end is curved and is provided with registering apertures d, in which a pin cl is mounted. In apertures e in the standard are journaled the pins 6', secured to the opposite faces of the lever D, said pins being provided as fulcrums for the lever.

Mounted on the pin d is the pendent link and curved, as illustrated, and in registering apertures in the curved portion of said link is mounted a pin F, on which is journaled the locking cam-lever H, which is held or balanced in position by the Weighted end of the handle portion thereof. The lower ends of the link carry in apertures thereina pin f, which is designed to engage in any one of the several notches O in the marginal edge of the longitudinal slot in the barO and beheld therein by the end of the cam-lever being frictionally held against the outer longitudinal edge of the bar 0.

In order to guide the bar 0 in its longitudinal movements, pins K are passed through the walls of the standard and contact with the marginal wall of the slot and one of its outer edges.

The operation of my lifting-jack is simple and will be readily understood.

The height at which it is desired to adjust the lifting-bar is regulated by placing the pin fat the end of the link F in any one of the several notches C, and said pin is held in a particular notch by means of the cam-lever, which frictionally bears against the longitudinal edge of said bar opposite the notches engaged by said pin, and by operating the leverD the link will cause the bar 0 to be raised and lowered.

Having thus described my invention, what I claim to be new, and desire to secure by Letters Patent, is-

1. A lifting-jack, comprising a standard, a longitudinally-slottedliftiug-bar,withnotches in one edge of said slot, mounted within the standard, a pivoted lever mounted upon said standard and having abifurcated end, apendent link pivoted between the arms of the bifurcatedend, the lower end of said link being curved and bifurcated, a pin carried at the lower end of said link, designed to engage said notches, a cam-lever pivoted between the bifurcated ends of the link and designed to engage the outer edge of said bar and draw said pin into one of said notches, as set forth.

2. A lifting-jack, comprising a standard, a longitudinally-movable lifting-bar having an elongated slot therein, with notches in one edge of said slot, a lever, bifurcated longitudinally, pins projecting from the opposite F, the lower end of which link is bifurcated sides of the arms of the bifurcated portion, said pins being pivoted in the standard, said lifting-bar adapted to work between the arms of said lever, a pendent link pivoted between the arms of said pivoted lever, a pin mounted in the lower bifurcated end of said link, said pin adapted to'enga'ge the notches in the li'ft- 1 ing-har, and a cam-lever pivoted near the angled portion of said link, and designed to bear against the outer edge of the lifting-bar to draw the pin into one of said notches, as set forth.

3. A lifting-jack, comprising the standard,

the lifting-bar, and guide-pins in the standard, said bar being longitudinally slotted and 'havinga series'o'f notches in one edge of said "slot, abifurcated operating-lever with arms signature in presence of two witnesses.

CHARLES EDWIN AROHIBALD. Witnesses:

SoLoN BRA G,

CALVIN J. 'Hmns.

on either side of said bar, and pivoted to the

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