US449515A - Lifting-jack - Google Patents

Description

(No Modevl.)

H4. BILLINGS.

LIPTING JACK;

No. 449,515. Patented Mar. 3l, 1891.

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HARRISON BILIINGS, Ola JAMESTOWN, NEV YORK.

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SPECIFICATION forming part of Letters Patent No. 449,515, dated March 31, 1891.

Application led November 17, 1890. Serial No. 371,627. (No model.)

T all whom t may concern:

Be it known that I, HARRISON BILLINGS, a citizen of the United States, residing at Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Lifting-Jacks; 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.

Figure l is a side elevation of my lifting'- jack. Fig. 2 is a detail of the step K.

My invention relates to that class of lifting-jacks employing a lever and pawl-andratchet mechanism for raising and holding in an elevated position the article to be lifted; and my invention consists in the constructions and combinations of devices which I shall hereinafter fully describe and claim.

In the said drawings, A represents a base or support, to which is secured the verticallydisposed standard B, whose upper end is beveled or inclined at opposite sides to forni seats a for the operating-lever C at the limit of its upward anddownward strokes.

Bolted to opposite sides of the standard Il and rising above the upper end thereof are plates D, between which passes the inner end of the operating-lever C, which is pivoted to said plates by a bolt b, and is secured by a nut b in the usual manner.

Above the lever C and passing through the plates D is 'a second bolt E, upon which is pivotally hung a pawl F, whose outer or free end is adapted for engagement with a rackplate G, bolted to the upper surface of the lever O, and said lever has also'secured to it a plate H, which projects beyond the inner end of the lever and is formed with an eye c.

In front of the standard B, and parallel with the same, is a vertical bar I, whose upper end is formed with a hook d, adapted to be engaged by the eye c on the plate Il, whereby said bar is suspended directly from the lever.

To connect the lower end of the bar I with the standard, I employ links J, one on each side of the bar and standard, and having a pivotal connection at opposite ends to permit the free movement of the bar and to prevent the same coming in contact with the standard.

The front face of the bar I is formed with ratchet-teeth g, adapted to be engaged by a step l, which is designed to support the art-icle to be raised. This step is made of asolid piece having a square hole in it of a size about equal to the diameter of the bar I, which passes through it, and the front wall of the opening in said step engages the ratchet-face of the bar and serves as a pawl for retaining the step in position.

To give additional strength to the standard, I employ a brace L, which is bolted to the rear side of the standard and to the basepiece, as shown.

The operation of my device is substantially similar to like devices now in use. When the vehicle or other article is to be lifted, the jack is placed alongside of it, the operating-lever elevated to canse a corresponding lowering of the ratchet-bar I, and the step adjusted along the ratchet-face of the bar I until it iits under the desired Vpart of the vehicle or article. The lever C is then pressed down, thereby elevating the ratchet-bar I and its step and lifting the vehicle or article the desired height, the pawl F in the meantime slipping over the rack-plate on the lever until the proper adjustment is obtained, when the pawl retains the jack in its position by its engagement with the rack-plate. the vehicle or article, the operator lifts the pawl F out of its engagement with the rackplate,'when the weightof the elevated structure causes the lowering of the ratchet-bar I and its load.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isy l. In a lifting-jack, the base, the vertical standard, and the pivotally-secured operatinglever having a rack on its upper side, in combination with a vertically-disposed ratchetbar suspended from the end of the lever, the

To lower,

links upon each side of the standard, pivotallysecured thereto and also to the lower end of the ratchet-bar, a step mounted upon the ratchet-bar, havin ga hole through which said bar passes, and a retaining-pawl for the operating-lever, substantially as herein described.

2. An improved lifting-jack consisting of a base, a vertical standard fixed thereto, the

ISO

plates D, bolted to the upper end of the standard and extending beyond its top, the operating-lever pivoted between said plates, having a rack-plate secured to its upper surface, a plate H, also secured to said surface, projecting beyond the frontof the lever and formed with an eye c, a pawl pivotallyhung` between the plates D and adapted to engage the rackplate on the lever,a bar suspended by a hook n from the end of the plate ll, and having its front face formed with ratchet-teeth, two parallel links `at the lower end of the bar pivotally secured thereto and to the standard, and a step on the ratchet-bar, having an opening' through which the bar passes, substantially x 5 as herein described.

In testimony whereof I aftix my signature in presence of two Witnesses.

HARRISON BILLINGS. WVitnesses:

MARTIN MERZ, CHAS. M. BROWN.

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