US362456A - Thomas maxon - Google Patents

Description

(No Model.)

' T. MAXON.

LIPTING JACK. N0. 362,456. Patented May 3, 1887.

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N. rnzws, Photo-um g UNITED STATES THOMAS MAXON, or DAYTON, OHIO, ASSIGNOR or ONEHALE TO J. w.

PATENT OFFICE.

CARPENTER, OF SAME PLACE.

LIFTING=JACK.

SPECIFICATION forming art of Letters Patent No. 362,456, dated May 3, 1887.

Application filed January 27, 1886. Renewed February 28, 1887. Serial No. 229,228. (No model.)

the trade and to the marketin a very durable and cheap shape, as will be-hereinafter more particularly set forth.

In the accompanying drawings, making part of this specification, Figures 1 and 2 represent side elevations in different positions. Fig. 3 is a perspective of the body and base of the jack; Fig. 4, a vertical section of same, and Fig. 5 is a perspective of a portion of the lifting-bar.

In the figures, A represents the body of the machine, cast integral with the base A. This body is east with a vertical square opening to receive the lifting-bar B, or, rather, its lower end. Vertical slots G are cast in two sides of the body, and a perforated lug, a, is east upon one side of same.

. B represents the lifting-bar, which is serrated or provided with teeth on one edge above its middle, and upon its top it has a crown-piece, F.

B represents the lower portion of the lifting-bar, which has trunnions (1 upon two of its sides. These trunnions play in the slots G of the body. 7

0 represents the operating-handle'of the machine, which is in shape an. elbow'lever. Through its elbow it is pivoted to the perforated lug a, as represented.

D represents a connecting-link, one end of which is pivoted to the short end of leverhandlc C and the other to trunnion d. The lever-handle O is double at its short end, its two arms connecting to the links D, embracing the body A.

6 represents the pivot connecting the handle 0 to the links D.

WVhen the lever O is raised or lowered, the pivotal point ate shifts from one side to the other of a central vertical line in body A, so that when the outer end of lever Ois brought down, as seen in Fig. 2, the pivot e is so situated with reference to the liftingbar B, links D, handle 0. and body A that a secure lock is formed. When the outer end of lever O is raised, the lifting-bar B will be lowered through its connections, as seen in Fig. l.

E represents a step, having a loop formed upon it which surrounds bar B, it also having a spur which is intended to catch upon the serrated edge of the said bar B. The step, by reason of the size of the strap which connects it to bar 13, is easily raised or lowered by the hand to adjust it when not encumbered by weight. The sagging of its outer end causes its spur to engage the bar.

Having thus fully described my invention, what Ielaim as new, and desire to secure by Letters Patent, is-

- A rectangular hollow standard, A, slotted upon two'of its opposite sides and provided with a base, A, and lug a, in combination with a bifurcated elbow-lever, O, fulcrumed upon the lug a, the serrated lifting-bar B, provided with a trunnion, d, passing through the slots in the standard, the links D, connecting the lifting-bar to the shorter arm of the lever C, and the step E, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS MAXQN.

Witnesses:

S. Burns J ONES, E. F. KIMMEL.

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