US315807A - Thomas maxon - Google Patents

Description

(No Model.)

T. MA'XON.

LIFTING JACK. No. 315,807. Patented Apr. 14, 1885.

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THOMAS MAXON, OF DAYTON, OHIO, ASSIGNOR OF ONE'HALF TO JAMES XV. CARPENTER, OF SAME PLACE.

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SPECIFICATION forming part of Letters Patent No. 315,807, dated April 14, 1885.

Application filed November .28, 1884.

To aZZ whom it may concern.-

Be it known that I, THOMAS Manon, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Lifting-Jacks, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to improvements in lifting-jacks, and is designed to produce a device of few parts and extremely simple construction for light work, being especially adapted as a buggy-jack. The construction is such that when in an elevated position it is self-locking.

In describing the device reference is had to the annexed drawings, in which Figure 1 represents an elevation of the device in the lowcred position, and Fig. 2 a similar view with the device in an elevated position.

A designates a standard having its upper portion 11arrowed,forming thereby a shoulder, B. The head of the standard projects and has a passage through it for the lifting-bar C. The foot of this bar 0 extends and is provided with a passage, whereby it is enabled to embrace the lower part of the standard. Its up per end, D, is beveled and shouldered to form a. seat fora cap, E, which is provided with a beveled hole to correspond to the end D, and has its upper side curved so as to take a firm hold on an article and prevent slipping. The lifting-bar is provided with teeth F, in which engages a projecting part of a bracket, G, makin g the said bracket adjustable on the said bar. By this means articles of less height than the top of the bar 6 may be lifted. G has an extension embracing the lift-bar O, by which it is held in position, the narrowed portion of the standard allowing for its play on the bar and its movement when the jack is operated. The shoulderB prevents its adj ustinent farther downward than the last tooth, F, on the bar 0. A link, (orlinks,) H, is pivoted to the upper end of the standard and to the angle or curve of a handle, I, having an extension, K, at about or nearly right angles, one side, L, being straight and flat. The end of the extension K is pivoted to the foot of The bracket (No model.)

the bar 0, which foot projects somewhat beyond the passage in it. IVhen the jack is in the position shown in Fig. l, the handle is depressed, elevating the lifting-bar and cans ing the link to approach the standard. This brings the parts in the position shown in Fig. 2. The side L engages against the standard, the bar 0 rests on its upper end, and the link II prevents all downward movement, the parts being thus firmly locked in position. The lift of the jack will vary with the length of the extension K.

.Vhat I claim is- 1. In alifting-jack, the combination, with a standard, of a lift-bar and a lever-handle with a movable fulcrum-supports, said handle having its shorter arm at an angle to the longer arm and pivoted to the lower portion of the said lift-bar, the side of the shorter arm coinciding with the standard. being straight. and fiat so as to rest against the same and lock the lift-bar, substantially as and for the purpose specified.

2. In a lifting-jack, the combination, with a standard, of a lift-bar having teeth on it, a bracket adjustable on said bar, a handle with an extension at an angle thereto, and suspensory links, substantially as and for the purpose specified.

3. In a lifting-jack, the combination, with a standard having a portion of its length narrowed, of a toothed lift-bar, an adjustable bracket on said bar, a handle with an extension at an angle thereto, and suspensory links, substantially as and for the purpose specified.

i. In a lifting-jack, the combination, witha standard narrowed through a portion of its length and provided with an extended head. of a toothed lift bar beveled and shouldered at its upper end, a cap for said end, a bracket adjustable on said bar, a handle with an extension at an angle thereto, and suspensory links, substantially as and for the purpose specified. Y

5. In alifting-jack, a levenhandle having its shorter end or arm at an angle to the longer, one edge or side of said arm being straight or flat, substantially as and for the purpose specified.

6. In a lifting-jack, in combination with a In testimony whereof I affixmysignature in lift-bar beveledat its top, a cap with a bevpresenceof two witnesseseled passage for the end of said bar, substantially as and for the purpose specified. I THOMAS MAXON. 5 7. In a lifting-jack, the combination, witha standard having a portion of its length nar- I Witnesses:

rowed, of a lift-bar carrying a bracket, subl WEBsTER- W. SHUEY, stantially as and for the purposespecified.

:MARTIN J. JoHNsoN.

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