US264732A - Lorenzo meeker - Google Patents

Description

L. MBEKER.

LIFTING JACK.

(No Model.)

Patented Sept. 19, 1882.

www, G.

UNITED STATES PATENT OFFICE..

LORENZO MEEKER, OF CHICAGO, ILLINOIS, ASSIGNOR 'OF ONE-HALF TO EUGENE MEEKER, OF SAME PLACE.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 264,732, dated September 19, 1882.

l Application tiled July 13, 1882. (No model.)

To all whom fit may concern:

Be it known that I, LoaENzo MEEKER, of Chicago, iu the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lifting-Jacks; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reterence being had to the accompanying drawings, which form a part of this specification.

This invention relates to lifting-jacks; and it consists in certain improvements on my PatentNo. 198,654,0f December 25, l877,whereby amore substantial,durable,andadaptedbracket is provided for the lifting-lever, and more efficient and convenient clutch means enlployed for holding up the elevating rod or bar, all substantially as will be hereinafter more specilically described and claimed.

In the drawings, Figure lis a side view of the improved jack; Fig. 2, a vertical sectional view thereof; Fig. 3, an end view, and Fig. 4 a horizontal sectional view, on the line a; ai, Fig. 2.

Referring to the drawings, A designates the tubular standard supported on base B,in which works the rod or bar C, having lifting-head D, all as shown in my above patent.

Near thc top of standard A projects a lateral C-shaped bracket` E, the ends ot' which, F F, have eyes GG, which embrace the stainlard to retain thc bracket in position.

H is the lifting-lever, the arms I I at the bifurcated end ot' which embrace and are pivoted to the upper corner of bracket E by a pin or bolt, J.

To the ends of arms I I are p'ivoted, by pins K K, connecting links or pieces L L, which latter are pivoted at their tops by a pin, M, to a clutch-lever bar, N, having a concaved end, 0, and a beveled under side, P.

Q Q are two side arms or plates, which are pivoted by a transverse fulcrum-pin, R, to the lever N, and have pivoted at their opposite ends, by a transverse fulcrum-pin, S, a correspondin g stub-lever, T, having alike concaved end, U, and beveled edge V. This clutch mechanism is very ecient and cannot slip when the load is raised. While the lilting-rod C can be readily raised to the load, the levers N and T lirmly bind against its sides and prevent any downward movement until the stuhlever is elevated above the lever N, when the formed with eyes to embrace the standard and secure the bracket thereon, the lifting-lever H, connecting-amis L L, clutch N T, and elevatingrod C, substantially as seti'orth.

2. The combination, with the lever-bar N, having the concaved end and beveled edge, and connected by pivoted pieces with the lit'ting-lever, of the .side arms or plates, Q Q, pivoted by a transverse fulcrum-pin to lever N, and a stub-lever, T,having a like concaved end and beveled edge, and connected to the opposite ends of plates Q Q by a transverse fulcrum-pin, S, substantially as set forth.

3. The combination, with the tubular sta-ndard, ot' the C shaped bracket secured thereon and having pivoted to its upper corner the lifting-lever, connectingpieces L L, bar-lever N, side arms or plates, Q Q, stub-lever T, having` transverse fulcrum-pin S, and the lifting-rod C, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

LORENZ() MEEKER.

,Witnessesz E. E. MEEKER, J ULIUs Ka'rz.

Images