US252512A

US252512A - peace

Info

Publication number: US252512A
Authority: US
Publication date: 1882-01-17
Anticipated expiration: 1899-01-17

Description

(No Model.)

J. G.PEACE.

STUMP EXTRAUTOR.. ;No. .252,512. Patented Jan.`17,1882.

Fig 3.

\ UNITED STATES PATENT OFFICE.

JOHN PEAGE, OF SALEM, MISSOURI.

STUM P-EXT RACTO R.

SPECIFICATION forming part of Letters Patent No. 252,512, dated January 1"?,

Application filed November 26, 1881. (No model.)

To all whom it may concern:

Be itknown thatl, JOHN G. PEACE, of Salem, in the county of Dent and State of Missouri, have invented a certain new and useful Improvement in Stump-Extractors, of which the following is a f'ull,clear, and exact description, reference being had tothe accompanying drawings, forming part of this specification.

My improvement relates to a cheap and effective machine `for extracting stumps or lifting heavy objects, such as stones, Snc.

My invention relates, tirst, to the frame or derrick, so made as to accommodate itself to anyinclination or slope of the ground on which it rests.

My invention relates,.secondly, to the two levers supported by the derrick and having eccentric heads pivoted together eccentrically by a pin and working on the cross-beam of the derrick. My `invention relates, thirdly, to a cup secured to or resting upon the cross-beam and forming a bearing-surface for the heads ofthe levers.

My invention relates, fourthly, to the hoisting-yoke working in slots or mortises in the cross-beam of the derrick, and havingits outer falces serrated or notched to engage with supporting-pawls on the top of the derrick, and

with hoisting clevises secured by straps or linksl to the levers.

My invention relates, tthly, to a doubleheaded distance-bolt, for the purpose hereinafter set forth.

My invention relates, siXthly, to the combination of the above elements.`

In the drawings, Figure l is a perspective view of my improved apparatus, and Figs. 2 and 3 are detail vertical sections of the same. Fig. 4 is a perspective view of the distance bolt or bar. Figs. 5 and 6 show modilications.

The derrick consists ot' a block or beam, A, with stationarysupporting-legsaat one end and pivoted supporting-legs a atthe other end. The reason for having two of the legs thus pivoted to the block is for the purpose of ad justin g this end of the block up or down to correspond with to their adjustmentl by a chain, a?, secured to one ofthe legs and engaging with a hook on the other. The adjustable legs are secured to the block Aby a pin, a3, inserted into or formed upon this end ofthe block. They are retained in p lace by a Vsmall transverse pin, a4. The block A is, mortised at a5 and a6 for the passage of the ends ofthe reciprocating hoistingyoke B. (See Fig. 3.) The yoke consists,.pref erably, of a single plate or hat bar of metal bent into the propershape, (see Fig. 1,) and having its outer faces serrated or notched, to be engaged by-retaining-pawls b, whose lower ends rest in notches of the block A, (see Fig. 3,) and by clevises o, connected by straps or links c and bolt c2 to the hoisting-levers C. The inner ends of the hoisting-levers consist of. eccentric cams c3, which preferably have bearing in a cup,D, secured to or resting upon the block A, and which are pivoted together by the strap-bolt c2. The eccentric cams may be made of metal and secured to the levers proper, as shown. The connecting-bolt c2 passes through the heads ot' the levers eccentrically above the center, so that as the levers are operated the yoke will be raised. The upper ends of the yoke are prevented from clamping upon the levers under the pressure of the retainingpawls by a distance bolt or bar, E, having heads e, which embrace the yoke in such a manner that the bolt or bar has l'ree vertical movement.

The operation of the machine is as follows: The dei-rick is first placed over the stumpor object to be elevated and the yoke B connected to said object by the chain F, and if the object is on a side hill the legs aa-re adjusted to put the block A into a horizontal, and consequently the yoke B into a vertical, position.

The levers are next operated by power being applied to their outer ends, and by the eccentric heads. and the eccentric connection between them the yoke is elevated, together with the object to which it is attached, and retained at that elevation bythe pawls b engagn g with the notches on the yoke. It' one sweep of the levers does not raise the object suflic'ientl y, an d generally it will not, the outer ends ofthe levers are simply raised again, which will lower the clevises c and cause them to take a hold lower down on the yoke, and the operation is repeated.

IOO

As a modification of the -two operating-levers, oneonly may be used for light Work, as shown in Fig. 5. 4 .f

As a modication of the pawls b, a link sup- 5 ported by a suitable bracket (see Fig. 6) may be used,said link clasping the bar in the same way as the hoisting-links beneath. In this case theyoke is not necessarily serrated or notched.

I claim as my inventibul. In a stump-extractor, the derriok consisting of block A, with stationary legs a and adjnstable legs a/,as and for the purpose set forth.

2 In a stump extractor, the levers (Lhaving eccentric heads c3, eccentrically connected to- 15 gether by the strap-holt c2, as and for the purpose set forth.

3. In a stump-extractor, the cup D, secured to or resting upon the derrick, and forming the bearing-surface of the levers, substantially as set forth.

4. In a stump-extractor, the distance bolt or bar E, having heads e, as and for the purpose set forth.

5. The combination of derrick A a a', yoke B, levers C, with eccentric heads c3, pawls b resting upon the top of the derrick and. engaging with the notches on the yoke, as and for the purpose set forth, connecting-bolt c2, straps or links c', and clevises c, all substantially as set forth.

, JOHN G. PEAGE. Witnesses:

E. T. WINGO, W. R. LOVE.