US70591A - Improvement in lifting-jack - Google Patents

Description

@uiten gisten @anni @frn WILLIAM MCMILLEN, OF MILAN, ASSIGNOR TO HIMSELF 'AND Z. KING, OF CLEVELAND, OHIO.

Leners Patent No. 70,591, dated Novembe'r 5, 1867.

IMPROVEMENT 1N LIPTmG-JAGK.

' dite dgehule referreh -tn in these etttrs atent aub making putt uf tte same.

TO .ALL WHOM IT MAY CONCERN: Y l

Be it known that I, WILLIAM McMILLnN, of Milan, in the county of Erie, and State of- Ohio, have invented certain new and useful Improvements in Lifting-Jacks; and I do hereby declare that the following' is a full and complete description of the s arne,rei`erence being had to the accompanying drawings, making a. part of this specication, in which- Figures 1 and 2 are side viewsof the jack in different positions.

Figure 3 is. a. top view.

Like letters of reference refer to like parts in the views.

In the drawing, A A represent the legs or standards of the jack, one of which, A, is longer than the other, and is also provided with a. shoulder, b. The upper ends of these standards are connected together by means of the link B, which is secured to each leg by the screw-bolts a a. C is a lever, whih is secured to the opposite side of the legs, but by means of the same bolts a a; the bolt a connecting the lever to the leg A,a.nd the bolt a to the leg A', as shown in iig. 3. i

When the jack is to be used, it is pla-ced in the position shown in tig. 1, the load resting en either vone of the pins D in the leg A, as may be desired to raise the load more or less; then, by pressing on the lever, and pushing it down, the upper end 4of the leg A will be lowered and the leg A raised, thus lifting the load, and the lever, when pushed down in this way, shown in fig. 2, serves as a lock to hold the jack in position. When the jack is in this position, shown in tig. 2, the end of the leg A comes against the leg A, as indicated by the dotterllinesc, fig. 2, and prevents it from being pushed or moved out of pince, as the weight of the load on the ieg A has a. tendency to press and hold them together., When the jack is not in use it can be'folded together, as indicated by the dotted lines E, iig. 1, thus taking up very little room, and is easily handled, being also cheap and durable. i l v What I claim as my improvement, and desire to secure by Letters Patent, is-

The arrangement ofthe legs A A, in combination with the lever C and link B, whenl pivoted or jointed in the manner substantially as described. WILLIAM McMILLEN.

'Witnessesz S. P. BECKWITH, R. M. KLINE.

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