US894843A - Stump-puller. - Google Patents

Description

J. LYNCH. sTUM-P PULLER.

APPLICATION-FILED AUG. 22, 1907.

PATENTBD AUG. 4, 1908.

z SHEETS-SHEET 1.

.TOHN LYNCH, OF RODNEY, MICHIGAN.

STUMP-PULLER.

i Specification of Letters Patent.

Patented Aug. 4, 19o8.

Application' filed. August 22, 1907. Serial No. 389,691.

To all whom it may concern.' j

' Be it known that I, JOHN LYNCH, a citizen of the United States of America, residing at Rodney, in the county of Mecosta and State of Michigan, have invented certain new and useful Improvements in Stump-Fullers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the artto which it appertains to make and use the same.

My invention relates'to improvements in stump pullers, and its object is 'to provide the same with levers and tackle so constructed that in starting the hoist the. device will develop great power and slow movement,

and later on can be operated more rapidly of the and with less ower to complete the hoisting,`

and to provi e the device with various new and useful features 'hereinafter more fully described and particularly pointed out in the claims, reference being had to the accompanying drawings in which :h

Figure 1 is a side elevation of a device embodying my invention, adjusted as at commencement of the operation. Fig. 2, the same adjusted as at the end of the lirst'stage of the o eration. Fig. 3, an enlarged detail oisting bars and parts co-acting therewith; Fig. 4, a further enlarged' detail of a portion of the 4lower hoisting lever; Fig. 5, a plan view of the lower hoisting lever on a reduced scale, and Fig. 6, plan view of the upper lever. t

Like numbers refer to like parts in all of the figures.

The frame of the device consists of a tripod, consisting of posts or le s 1, 2 and 3 pivotally attached near the top by means of a bolt 4. The leg 1 being prolonged above the Vpivot for the purpose of attaching the various tackle blocks hereinafter described.

5 is a shackle surrounding the upper part of the leg 1 and supported by the upper ends of the legs 2 and 3. To this shackle are pivoted pendulum rods -6 and 7 to support the respective hoisting levers 8 and 9 arranged one above the other. The lever 9 being supported by the shorter rod 7 and the lever 8 supported beneath the lever 9 by the rod v6.

Vertically disposed hoisting bars 10 extend downward at each side of the levers, be-l ing provided at the upp er end with a connecting bolt 18 which adjustably engages a series of hooks 19 in the upper edge of the lever 9. These bars are provided at the lower tached one end of a chain 31 to engage the stump or other object to be hoisted, the

other end of thischain being adjustably held.

ina recess 32 inv this head. These bars 1() are provided with hooks 14 at intervals to re- .ceive pins 13 and 17 arranged transversely end of the link and` adjusted in recesses 15 at intervals in the upper edges of bars 11. For high power I also provide a pin 17 extending transversely of the bars 11 and adjustably sup orted thereon by means of a link 16 pivote in the blace bars at its lower end, and su orting t e in 17 in its u er end. Whldreby the pinp17 may be shiftld to two different distances from the pivot of the lever, by tilting the link on its pivot, and is securely retained in each position. To operate these levers, pulley blocks 20 and 22 are attached to the respective levers, and pulley end with a swiveled head 30 to which is atblocks 21 and 23 are attached to the upper en d of the leg 1, and a rope or cable 24 is rove through these various ulleys in succession and thence extended ownward through a block 25 near the bottom of one leg of the tripod, and the end of this rope extends horithe tripod, and when so engaged the lever 9 is held in elevated position by saidrope 27.

In operation, the device is adjusted as in Fig. 1 with the chain 31 attached to the object to be. hoisted, and if only moderate power is re uired the pin 13 is engaged with one of the ooks 14 of the bars 10 and the bolt 18 with one of the hooks 19 in the lever `9. These parts may be adjusted at various I distances from the pivots of the levers accordin to the power required. In extreme cases t e pin 17 can be engaged with. the upper hook 14, thus increasing the leverage of thelower lever to the maXi mum. After such adjustment, by applying power to the cable 24 the levers are hoisted at their movable ends, and will assume substantially the positions shown in Fig. 2 thus starting the stump which at first requires the greatest amount of power and the slowest hoisting motion, The upper lever 9 is now secured in the substantially vertical position by engagement of the ring 2S with the hook 29, as in Fig. 2, thus throwing out of action the upper lever, reducing the hoisting power, and increasingthe rapidity of the hoisting movement. This movement may be increased and the power further reduced by shifting the link 12 away from the pivot of the lever 8. The next hoist is now taken by means of the lever 8 alone, the bolt 18 traversing on the lever 9 and successively engaging the hooks 19 thereon, thus at each hoist holding all that is gained, and raising the stump step by step as the lever 8 is successively operated. lhe

n pin 13 being shifted downward in the hooks 14 at each movement of the lever 8, and the link 13 shifted away from the pivot of the lever as the power required decreases.

By this device I am thus able to develop great hoisting power with slow movement while starting the stump and later on decrease the power and increase the speed of movement, which is impossible in many devices specially those depending on a screw for hoisting power or on levers having fixed adjustments.

What I claim is:

1. In a stump puller, the combination of a hoisting bar, two levers separately connected to said bar, a hoisting tackle common to both levers, and means for holding one lever immovable.

2. In a stump puller, the combination of a frame, two levers, a pulley block on each lever, opposing pulley blocks on the frame, a continuous rope or cable rove through all of the pulley blocks, and means for holding one of the levers stationary while operating the other lever.

3. In a stump puller, two superposed and independently movable levers, hoisting tackle to operate the levers, means for holding the upper lever in elevated position, lifting bars arranged transversely of the levers, and

means for adjustably connecting the bars to the respective levers.

4. In a stump puller, two superposed levers, means for simultaneously operating said levers, means for holding the upper lever in raised position while operating the lower lever, a series of hooks on the upper lever, lifting bars having aseries of hooks, and a transverse pin on the lower lever and adapted to successively engage the hooks on the lilting bars.

5. ln a stump puller, a tripod, two pendulum rods supported at the upper end by the tripod on upper lever supported by one rod, and having a series of hooks in its up er edge, a lower lever supported by the ot 1er rod, and having a transverse pin adjustable thereon, a hoisting tackle common to both levers, a rope attached to the upper lever and extending over a pulley on the tripod, means for securing said rope to hold the upper lever in elevated position, a hoisting bar at each side of the levers and having hooks at intervals, a bolt connecting the upper ends of said bars and adapted to severally engage the various hooks on the upper lever, and a transverse pin adjustable on the lower lever, and adapted to successively engage the hooks on the hoisting bars.

6. In a stump puller, the combination of a lever, hoisting tackle to operate the lever, brace bars attached to the lever and extending parallel therewith, a.v hoisting bar at each side of the lever and each having a series of hooks, a link adjustable between the brace bars, a pin in the upper end of the link and adjustably engaging the brace bars, a pin in the lower end of the link and successively engaging the hooks in the lifting bars, and means for supporting the lifting bars in.- dependent of the lever.

7. In a stump puller, the combination ol` a tripod, a tackle on the same, two pendulum rods supported by the tripod, an upper lever and a lower lever each supported at one end by a respective rod, a pulley block on each lever, opposing pulley blocks on the tripod, a continuous rope or cable engaging the pulley blocks, means for holding the up )er lever in elevated position while the lower lever separately operated, hoisting bars arch having a series of hooks, a series of hooks on the upper lever, a bolt in the upper end of the hoisting bars and adapted to successively engage the hooks on the upper lever, a pin adjustable on the lower leve` and adapted to suseessively engage the hooks on the hoisting bars.

8. In a stump puller, the combination ol aI tripod having one long leg extending above the other legs, a shackle surrounding the long leg and supported by the other legs, two pendulum rods supported by the shackle, an upper lever supported by one rod and having a. series of hooks on its upper edge, a lower lever supported by the other rod and having brace bars attached thereto and. extending beneath the same, a pulley block attached to each lever, opposing pulley blocks attached to the long leg of the tripod, a continuous rope or cable engaging the pulley blocks to operate both levers, a rope or cable attached. at one end to the upper lever and extending through a pulley block onv the tripod, a ring at the other end of the rope, a hook in the tripod to engage and hold the ring, hoisting l In testimony whereof I affix my signature bars embracing the levers7 a bolt in the 111113- in presence of two Witnesses. per end of the bars to successively engage t el JOHN LYNCH hooks in the upper lever, and a pin adjust- .5 ably supported on the'brace bars and adapted Witnesses:

to successively engage the hooks in the hois- PALMER A. JONES, ing bars. LUTHER V. MoULToN.

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