US108901A - Improvement in stump-extractors - Google Patents

Description

teniet %iaia Letters Patent No. 108,901, dated November 1, '1870.

IM PROVEMENT IN STUlViIL'EXTRATGRS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.-

Be it known that I, LYMAN B. GIBSON, of South Addison, in 'the county of Steuben and State of New York, have invented a certain new and useful Improvementin Machines .for Extracting Stum'ps, applicable also to oth'er uses, of which the following is a specification.

Nature of the I n-oeniion.

This invention consists in an improved arrangement of the capstan and connecting parts,as hereinafter described, whereby the sweep is easily engaged or disengaged.

Also, in an improved arrangement of the tackle, blocks, and ratchet and pawl.

' Genera-l Description.'

In the drawingv Figure 1 is a perspective view of my improved niachine; V

Figure 2, a sectional elevation;

- Figure 3, a viewof the ratchet zuid pawl on the under side of the frame for holding the strain; and

Figure 4, a diagram, showing the arrangement of the wedge-block for disengaging the the coupling.

A is the frame, which is braced, as shown, to revsist the greatest strain.

B is 'the capstan or windlass, mounted vertically thereon.

This capst-an is preferablyinade hollow, and at the top of the winding portion, for a short distance down, isl made straight, and it is then made in the form of the frustuni of a cone, so that the ropeor chain C, which winds thereon, will exert the greatest leverage en starting, and gradually decrease as it winds up more rapidly.

lhis is adapted to the nature of the. work, as the stump starts -hard at iirst, and gradually weakens as the roots loosen. y

D is the s\veep,of curvedor bent form, fitting in a socket, E. Y

This socket has a bearing, a', that iits loosely on the uppereiid ot' the capstan.

Both the eye of the bearing and the capstan on which it fits are slightly conical, so 'that when the bearing is raised, it will again fall in place when released. lhe socket and the capstan are both provided with a notched coupling, b, which, as 'the sweep goes forward, engages and thus imparts motion to the capstan, but as the sweep goes back, discngagesfthus releasing the capstan.

G is an linclined wedge-block, hinged at o, on top the frame, under the inner end of the sweep.

When lying fiat, as in iig. 1, the sweep passes over it without affect-ing the coupling; but when the block is elevated, as in tig. 4, and the sweep is reversed by hack action, the latter will ride up the inclined plane l1, thus disengaging the coupling, and releasing the eapstan from the sweep. llllisis-frequently necessary, especially in working in positions where but half a revolution ot' the sweep can'be attained, in which case, by successively backing up, and alternatelyengaging and releasing the coupling, the'worlg can be performed. y

ln passing entirely around, it' the wedge-block stands elevated from the point of starting, the sweep will strike it from the rear, and throw it-,down automatically, requiring thus no special attention from the operator.

H is a ratchet-wheel,secured to the lower end of4 thecapstan; and

I, a pawl, which engages therewith, the object being to hold the strain of the capstan when the .power Von the sweep is released.

" The pawl is operated by a doublecord or connection, j, passing through loops g g,A and its ends attached to the stem ot' the pawl. By drawing one way or the other, the pawl will be thrown in or ont'ot gear.

lhe winding-cord C, from its attachment to the capstan, passes 'back over pulleyl, hung to the end oi' the frame, andV also connects with pulleys 2 3 of block K, and also pulleys 4 5, suspended above.

A variety ot connections with these pulleys may be attained; for instance, as in iig. it may pass from pulley l over 4, thence dowiraround 3, thence up over 5, thence down around 2, and thence np to hanger k of pulley 4, to which it attaches; or, as in` tig. 2, fronrl around 2, around 5, around 3,'aronnd 4, to point la', offblock K, where it attaches.

Other arrangements of the vertical-adjustment of the rope or chain around the pulleys may be made, t0 which it is unnecessary to refer here, rlhese several changes are essential in modifying the power, or in adapting to the stump, which is connected with block K, by a separate chain or rope passing around it.

lhis machine is also adapted for use horizontally; for insta-nee, removing buildings, Yby removing the supporting part of the fra-me, letting the latter down near the ground, and using a straight sweep. In this case a change in the arrangement of the winding-cord or chain 0 is inade. 1t passes over pulley 1, as before but the block K is carried back horizontally past the machine, and the chain is carried around one or the other of its pulleys 2 3, thence up to the end f the frame, either attaching there or passing around another pulley' there, and carried back to the block and y attached to it.

Various modifications in the arrangement of the anni (tithe draft-chain or rope may'als'o be made here, but un# necessary to particula-rize, as the operator will quickly eomprehendlhcm in use.

The pulley7 l is hung by a stirrup, m'to a staple, 11, by which it can adapt itself easily to'any incline that the rope makes in drawing the stumps.

Pulleys 4 5 are also hung by eyes p 1J, of simple bolt-rods. P P, having also eyes p' p above, but at v right angles to those below.

Through the upper eyes keysss are p-assed to hold them in place. The rods are kept from turning by means of the lower eyes resting in corresponding slots or sockets of `the wood-work.

.This arrangement of the pulleys 1 4 5, and method of connecting and hanging them, is oueof thenovel features of my invention. 4 That I claim, and desire to secure by Letters Patent, is-` 1. The sweep D, capstan B, rope or chain C, and pulleys 1, 2, 3, 4, and 5, arranged and operating substantiall y as herein shown and described.

2. The capstan B, sweep D, coupling b, hinged wedged block G, ratchet andpawl H I, bolt-rods P P, and block K, when combined and 'operating in con-4 nection with the rope or chain C, and pulleys 1, 2, 3,

l 4, and 5, substantially as described.

3. In combination with the above, a connection, f, for operating the pawl, substantially as described, for the purpose setforth.

In witness whereof, I have hereunto signed my name in the presenceof two subscribing witnesses. LYMAN B. GIBSON.

Witnesses:

WM. S. L, MUTTIAX, M. J. GIBSON.

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