US141700A - Improvement in wagon-jacks - Google Patents

Description

N. [)HANDALL.v

Wagon-Jacks.

No. 141,700. Pate nted Augustl2,l873.

witnesses: Inventor:

@4 a/O 4 (7W Per Anomays.

UNITED STATES PATENT OFFICE.

NELSON ORANDALL, OF WOOSTER, OHIO.

. IMPROVEMENT IN 'WAGON-JACKS.

Specification forming part of Letters Patent No. 141,700, dated August 12, 1873 application filed June 28, 1873.

To all whom it may concern:

Be it known that I, NELsoN CRANDALL, of Wooster, in the county of Wayne and State of Ohio, have invented a new and useful Improvement in Wagon-Jacks, of which the following is a specification:

This invention relates to the construction of jacks for raising carriages and wagons and consists in the construction, arrangement, and combination of parts hereinafter described.

The drawing represents a side elevation, showing the. jack applied to a wagon, but with the outside removed to show the arrangement of parts.

Similar letters of reference indicate corresponding parts.

A is the stand, consisting of two plates, B, separated by a longitudinal strip, 0, a baseblock, and the block D, all of which are about the thickness of the lifting-bar and lever, but which allow the lifting-bar and lever free play between the plates or sides B. E is the lifting-bar, which is provided with a slot, F, in which slot is a stationary pin, G, for limiting its vertical motion. The bar is confined between the plates or sides B by the strip 0 and block -D. The lower end of the bar is cut on a circle, as represented, so that the end of the lever will always lift without binding it or causing undue friction. H is the lever, the fulcrum of which is at the point I. This lever is provided with a series of ratchet-notches, J. K is a pawl attached to the stand, which engages into the notches J, as seen in the drawing. The pawl holds the lever and lifting-bar in position when the latter is loaded. When the pawl is removed the long end of the lever will rise, and the lifting-bar will drop by its own gravity. L L are friction-rolls to prevent friction against the edges of the lifting-bar.

This is a very cheaply-constructed, durable, and efficient jack, very light, and not liable to get out of order, and its advantages must be obvious to all. A

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A lifting-jack composed of a stand, A, slotted lifting-bar E, lever H, and roller and pin, as shown and described.

2. In combination with the bar E beveled on its lower end, as shown, the lever H, pivoted at I, and cooperating therewith, as shown and described.

NELSON GRANDALL.

Witnesses J. A. CRANDALL, GEORGE F. KINGSLEY.

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