US37707A - Improvement in lifting-jacks - Google Patents

Description

W. F. RUNDELL. LPTING JACK.

No. 37,707. Patented Feb. 17, 1863.

' VUNITED 4Srrrrns PATENT OFFICE.

wILLiAM F. RUNDELL, or EAST GENOA, NEWv YORK.

IMPROVEMENTI LlFTlNG-JAoKs.

specification forming part of Letters Patent No. 37,701, 1f/.tee February 17,1863.

To all whom t may concern: l

Be it known that I, WILLIAM F. RUNDELL, of East- Genoa, in the county of Cayuga and btate of New York, have invented a new and Improved Jack for Eleva-ting Garriages; and I do hereby declare that thefollowin g is a fulll and exact description thereof, reference being had tothe'- accompanying drawings, making a part of this specification, in which-1 Figure `1 is a perspective view of my invention, and Fig. 2 is a side elevation of a portion of the lever and fulcruin-pin.

Similar letters of reference indicate corre spending parts in the two figures.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

I use for a base, a block of wood or other ir1n-material,:for ordinary purposes, the most convenient dimensions of which are twelve inches long, six inc hes wide, and two' inches thick. In the center of the base I erect a standard, d, of wood or other irm material, and permanently iixed to thebase by mortise orotherwise, and standing in aposition slightly inclinin g or vleanin g toward one end'of the base, by which inclination of the Istandard the weight which rests upon the jack when operating is brought to bear directly upon the center ofthe base, and thereby prevents tipping. The dimensions of a standard most convenient for ordinary use are two feet in length,four inches in width, and two inches in thickness. The upper halt of the standard I divide into three equal parts by running lines lengthwise thereof. I remove the inner part, leaving the two outer parts, which form two distinct pillars.

I provide two rack-bars, g g, of iron or other nietal, each being one foot in length. Each rack-bar has -upon its side a number of teeth, for the purpose of suiting the operation of the jack to any required degree of height. Each rack-bar corresponds with the other in the number, form, and size of the teeth. To each one of the aforesaid pillars, and upon that side ofthe standard forming an obtuse angle with the base, I firmly aftx by screws or otherwise a rack-bar, g, with the teeth pointing outward and upward, as clearly shown in the drawings. An iron or steel tooth-rack, e, with the teeth pointing downward, I attach t0 the standard, and upon that side forming an acute an gle with the base, and so arrange it that the points of the teeth are parallel. and-.in ran ge withthe inner side 'pf one of, the pillars, and at-'a distance-therefrom 'of live inchesor thereabout. The horizontal piece of the rack-bar at top, md by which it is attachedto the standard, resides serving the purpose ofattaching the rack to the standard,forms a handle by which the jaclr can be conveniently carried about. I construct a lever, 0,/ of a curved shape, which curved shape gives it great superiority over the straight lever in operating under carriages havingtheir bodies located immediately upon or near to the axle-tree, and extending out a few feet beyond it. The upper side of the lever at b I cut awa-y in an oval form, by

which means it gradually changes its point of contact with the axle-tree by rollin g,'and raises it perpendicularly, 'thereby preventing the axle-tree from sliding upon the lever. In the center of the oval form I makea small square niche to suit-the iron axle-treesof buggyy wagons.y l

m is a feathered-ed ge plate, secured by screws or otherwise to the upper side ofthe lever, and adapted to engage with the teeth of the rack c, to secure the lever at any desired height when subjected to strain on its `short end. Pasy ng loosely through the lever at six inches or t ereabout from the end is an iron fulcrumpim-a, which isl secured to its place by a setscrew, it, which passes perpendicularly through the leve/i' from the under side. The fulcrumpin is' fitted loosely in the lever for the purpose of allowing the latter to be vibrated or moved laterally upon the pin, -thereby pre venting the springing of the standards or bending of the lever in shifting its featherededge knife into the diii'erent teeth of the rack.

To operate with my invention, place the lever c between the pillars of the standard, with the fulcrum-pin a resting upon the teeth -of the rack-bars g g. Ilace the end of the lever, which is cut away to an oval form, under the axle tree of a carriage, and with the hand bear down upon the other end of the lever; An iron tooth lixed to the side of the lever will slide down over the teeth of the tooth-rack e, and maybe attached thereto at any point the operator may desire.

What I claim, and desire to secure by Letters lPatent, is as follows:

l. Having the fulcrum-pin a fitted loosely in' a hole in the lever c, and secured against casual longitudinal movement therein by ranged to operate in the manner and for the means of' a set-screw, nnvhen arranged in the purpose speoied. manner and' for the purpose specied.

2. The rigidly-attached rack-bar @standard WILLIAM F' RUNDELL' d, and toothed racks g g, ill-combination with Witnesses: jbhe looselytted fulcrum-pin a., lever c, and WM. A. CROPSEY, featherededge plate m, when tle Whole is zu DAVID MARSHALL.

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