US70644A - Improvement in lipting-jaok - Google Patents

Description

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IMPROVEMENT IN LIFTING-JAGK.

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TO'ALL WHOM IT MAY CONGERN:

Be it known that I, JACOB STOODY, o'Ripley, in the county of Brow'n, and State of Ohio, have invented a new and improved Lifting-Jack; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those :skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this spepzeification. v

This invention relates to a new and improved method of constructing jacks for lifting purposes, and the invention consists in operating upon an upright lifting-bar by an eccentric lever, and in the general construction and arrangement of parts, as will hereinafter be described.

ment. v

Figure 2 is an edge view of the same. Similar'letters of reference indicate corresponding parts. A represents the stand of the jack, which is made of either wood ormetal, andof suitable lengthand size for the purpose intended.v B is the lifting-bar, which moves up and down in a groove in the stand, thefac'e of Figurel represents a longitudinal side or front view ofthe machine, showing its construction and arrange' which is flush with the stand up to the shoulder C, against-which the eccentric operates. The bar is held in' place'by ametallic platea, on the'stanrhat its lower part, and by a metallic cap-plate, b, on the top of theA stand. *The cap-plate projects' suiciently tc allow thc bar to pass up through a mortise, as seen in the drawing. is the eccentric, and E is the eccentric lever.- F, iig. 2, is an adjustable ratchet-toothed rack, which is hungon a pivot on the stand for the purpose of' holding the eccentric in any desired positionne/The eccentric is hung or pvoted to the stand at the point G, and it will be seen that the motion of the bar B or throw of the i eccentric is equal to the distance of the pivot or fulcrum G to any portion of the periphery of the eccentric.

When the level` is elevated the bar will be down, and the jack can be placed for operating or lifting.

Bydepressing thelevcr the eccentric will gradually raise the bar by traversing the shoulder C. I When the desired elevation ofthe vehicle or article raised has been obtained, the rack F is brought forward and adjusted under the eccentric, as seen in fig. 2, which holds the eccentric, and the Weight raised in combination with the fulcrum-pivot G, in the desired position. A

This jack is more especially designed for lifting wagons and other vehicles, but may be advantageously applied to other purposes.

A Having thus described my invention, I claim as new, and desire to secure by Letters Patent- The stand A, the bar B, the eccentric D, with lever E, and the rack F, constructed, arranged, and cou:-

bined substantially as shown for the purposes sct forth.

JACOB STOODY.

Witnesses: M

GEORGE W. Fontina, J. W. `IrnLv.

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