US573950A - woodward - Google Patents

Description

(No Model.)

W. G.,WO0DWARD.

LIPTINQ JACK. V

No. 573,950. Patentedneo. 29, 1896.1

i bar can slide freely up and down.

` LIFT-mege-JAaKe SPECIFICATION forming part ef Lettere Patent No. 573,950, aerea Deeember 29, 189e. Application filed J'uly 23, 1896. Serial No. 600,210. (No model.)

To @ZZ whom it may concern,-

Be it known that I, VARNER C. W`OOD- WARD, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Lifting-Jacks 5 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.

My invention relates to lifting-jacks.

My object is to provide an improved liftingjack of more simple and cheap construction which will be extremely powerful and can be quickly and easily adjusted whenever desirable, and one provided with novel mechanism for locking it when adjusted. Having this object in view, my invention consists of a lifting-jack comprising those novel features and combinations appearing more in detail hereinafter.

The accompanying drawing represents a perspective view of the device.

The numeral l designates the base of the jack. From this base arises a standard 2, which is provided with a longitudinally-extending slot 3 that leads through the `upright from front to rear. At one side of the slot and at the upper end of the upright is located a rack 4.

The numeral 5 designates an adj usting-bar which is provided with a longitudinally-extending slot 6 and is adapted to slide against the front face of the upright. A U-shaped guide 7, connected to the upper end of the upright, and L-shaped guides 8 and 9, fastened to the lower end of the adj usting-.bar, are the means whereby the latter and the upright are held together, so that the adjusting- On the upper end of the adjusting-bar is located a concave rest l0 for the reception of the axle of the vehicle.

The numeral ll designates a rack which is connected to one side of the adjusting-bar, and l2 is a pawl which is pivoted to the upright and adapted for engagement with the rack.

An operating-leveris designated by the numeral 13, being pivoted in the slot of the upright on a removable pin 14. The upright is ver and adapted to lock with rack 4. The forward end of the lever` is cut away, as at 17, so as to accommodate a pitman, which will now be described. A pitman is shown at18,being pivotally connected to the forward end of the operating-leverand also pivoted on a removable pin 19, which passes through two of a series of pin-openings 20, made through the adjusting-bar. This pitman is adapted to work in and out of the slot of the adj usting-bar whenever the lever is operating. Different degrees of leverage can be obtained by removing the pin 19 and pivoting the pitman either higher or lower in relation to the adj ustingbar.

The operation is as follows: Vh en the lever is depressed, the pawls ride on the racks, and as soon as the movement of the lever ceases these pawls engage with the rack and hold the adjusting-bar raised, so that the vehicle is properly supported. When it is desired to lowerthe adjusting-bar, the pawls are pulled out of engagement with the rack and the lever raised upwardly.

Slight and immaterial changes of construction might be resorted to by one skilled in the art to which my invention appertains, and hence it is to be understood that I do not limit myself to the precise construction herein shown and described, but consider that I am entitled to all such variations as come within the spirit and scope of the invention.

Having thus described myinvention, what Iclaim as new, and desire to secure by Letters Patent, is-' l. In a lifting-jack, the combination with a base, of an upright arising therefrom which is provided with a rack, an ad justing-bar carryin g a rest and slidable vertically in relation to the upright, and being also provided withv a rack, a pivoted operating-lever, a pitman connecting said operating-lever with the adj usting-bar, a pawl pivoted to the upright and adapted to engage with a rack of the adjusting-bar, and a second pawl pivoted to the 1ever andadapted to engage with the rack of the upright.

2. In a lifting-jack, the combination with IOO a base, of an upright arising therefrom, amel;

Io oted to the upright and adapted for engagement with the rack of the adjusting-bar, and

a pitman connected to the operating-lever and ad j ustably connected to the adj listing-bar.

In testimony whereof I have signed this specification in the presence of two subserib- 15 ing Witnesses.

WARNER C. WOODWARD. Witnesses:

GEO. C. WILSON, ISAAC S. PARK.

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