US471878A - Stump-puller - Google Patents

Description

(Nb Model) W. B. MORRIS. STUMP FULLER. No. 471,878. Patented Mar. 2.9,i 11892.

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UNITED STATES PATENT OFFICE.

VILLIAM B. MORRIS, OF SEATTLE, VASHINGTON.

stump-FULLER.v

SPECIFICATION forming part of Letters Patent No. 471,878, dated'March 29, 1892.

l Application led October 17,1891. Serial No. 409.043. (No model.)

.To all whom t may concern:

Be it known that I, WILLIAM B. MORRIS, a citizen of the United States, residing at Seattle, King county, State of Washington, have invented an Improvement in Stump-Pullers; and I hereby declare the following to beA a full, clear, and exact description of the same.

My invention relates to an improved apparatus for extracting stumps, pulling heavy weights, and for other similar work.

It consists of certain details of construction, which will be more fully explained by reference to the accompanying drawings, in which- Figure l is a plan view of theworking parts of my apparatus. Fig. 2 is a side view of the same.

My present invention is an improvement upon a device for which Letters Patent No. 457,092 were issued to Ine August 4, 1891.

Ais a vertical shaft journaled to turn in a frame or`support B. This frame is mounted upon a sled, by which it may be transported to any suitable point, and has connected with one end of it an anchorrope or chain C, which is passed around a stump, tree, or other suitable stationary article, by which the device may be strongly anchored and prevented from movement. Y

D is a guide-strap secured to one side of the frame, and throughl this guide-strap passes the draw-bar E.

F F are two clevises or yokes-one in front of the other-tting the draw-bar, which is in the present case shown rectangular in crosssection.- At the side adjacent to the frame B these clevises are pivoted to the ends of the eccentric straps G. The eccentric straps are fitted in pairs to the eccentrics H H and H H', which are fixed upon the shaft A so that the throw of one pair is diametrically opposite to the throw of the other pair. The outer ends of the straps G of each pair of e'ccentrics are joined together to form a head W, through which the pivotpins F of the clevises or yokes F pass and in which they are mounted, whereby the latter are hung from the heads. Each ofthese extensions has a curved spring I secured to it, extending alongside the draw-bar and pressing against that portion of the yoke or clevis which is farthest from the hinge-pin. At the end of the draw-bar I have shown' the draft-head J secured firmly to it. This head'is cylindrical in shape and has a deep spiral groove J cut around its outer end, which also tapers to a conical point. The draft rope or chain X is attached to this head by means of a pin K and makes one or two turns around, passing through the groove, and thence out through the conical end of the head in direct line with the center of the draw-bar, so as to produce a central draft. I

The operation of, the apparatus will then be as follows: The shaft A is rotated by means of a sweep with horse or other power attached to its outer end. This sweep may be placed upon either the upper or lower end of the shaft A, these ends being squared for the purpose, so that the device may be used either for low or high work, as described in my former patent. When the shaft is rotated, the pairs of eccentrics will operate alternately upon their yokes or clevises, drawing vthem toward the shaft. The springs act to force the outer portion of `the'clevis backward, and it is thus caused to bind at opposite sides upon the draw-bar, thus pulling it and anything which may be connected with it toward the anchored frame B. While one pair of eccentrics is pulling the draw-bar the other pair is moving the other clevis outwardly, and when in their revolution they commence drawing toward the shaft this clevis will in like manner be cramped by the action of its spring, so as to pull upon the bar. The edge of the draw-bar may be either plain or corrugated to insure the clevises holding it Without slipping in heavy Work.

The two clevises have projecting arms L, by which they may be pushed against the springs into a position at right angles with the draw-bar, when they will not bind upon it and it may be slipped freely through its guide and the clevises to again extend it for a new pull'.

Having thus described my invention, what IOC shafts in pairs, which are set with their eccentricity dialnetr-ically opposite Vto each other, eccentric-straps surrounding said eccentrics, the extensions of each pair of straps being united into a single continuous plate having aperforated head upon the outerend, clevises pivoted to each of said heads `and surrounding the draw-bar, and springs secured to the eccentric-strapv extensions and pressing upon the clevises opposite their fulcrurn-points,

whereby they are caused to bind upon the draw-bar when moved by the eccentrics in one direction and to travel rfreely thereon? when movedV in the opposite direction, substantially as herein described.

'2. In a stump-puller, an anchored frame having a guide secured to it, a draw-bar sliding through said guide, a shaft journaled in the anchored frame, having two pairs of .ecoentrics secured to it, with the throw of each pair opposite to the other, strapssurrounding said eccentrics having extensions which are united to form a continuous plate and head foreach pair of-eccentries, clevises fulcrumed to these 'heads and fitted to clasp the draw-` bar, springs secured to the eccentric-plates and pressing against the ends of the clevises Opposite their fulcruin-points, and arms or pins by which the clevises may be pressed back against the springs, so as to stand at right angles with the draw-bar and allow the latter to be moved freely through them, sub-` stantially as herein described. v

3. In a stump-puller, the anchored frame, the shaft j ournaled therein,having oppositelyfixed eccentrics, eccentric straps and plates connected with each pair of eccentrics and' clevises fulcruined to them, a guide lixed to the anchored frame, a draw-bar vextending through this lguide and through the clevises,

springs Xed to the eccentrically-actuated plates and pressing upon the clevises to cause

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