US129984A - Improvement in traction-engines - Google Patents

Description

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Improvement in Traction-Engines.

N0. 129,984, Patented July 30, 1872.

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IMPROVEMENT IN TRACTlON-ENGINES.-

Specification forming part of Letters Patent No. 129,984., dated July 30, 1872.

Specification describing a Traction-Engine, invented by DWIGHT 0. PIERCE, of Portage, in the county of Kalamazoo and State of Michigan.

The first partof my invention consists of legs for propelling. The second part consists of a shaft, upon which is wound a chain, to which the load is attached; said shaft also carries a band-wheel, for stationary purposes, and is revolved by a rotary engine, or attached to the steam-cylinders. The purpose ofthis combination is to enable the engine, when drawing a load, to overcome such obstacles as hills or muddy places by first passing over the obstacle itself, and then, as a stationary engine, drawing its load over. It is'operated by removing a catch or pin from the shaft at the bottom of the hill, allowing the chain to unwind, the load to stop,'and the engine to ascend alone. 'At the top of the hill the engine may be stopped, the shaft set in motion to wind up the chain and -draw the load. The third part is the apparatus for guiding; andconsistsof a caster-wheel so arranged as v to run free or stationary. The fourth part consistsof an adjustable foot, the construction and use of which are clearly shown in the accompanying drawing, to which reference is fastened at the upper end to the frame by a pin or bolt, 0, on which they move. A .joint, 1), is made near the middle of the legs B, near which is attached an .endless chain, E, carried by concave pulleys F. On the opposite side of the frame A is attached to the chain E, as seen in Fig. 5, a similar leg, B, which alternates with its opposite leg in motion-that is, when one goes up the other goes down. The lower end of the leg B can be used with or without the foot, Fig. 4. 7

When the joint D is elevated by the action of the piston-rod G upon the walking-beam H through its connections I with the endless chain' E the lower half of a leg swings forward; bythe same motion the opposite leg B is being brought to a straight line, which moves the frame forward. A set of two legs is worked by each end of the walking-beam H. Y is the steam-cylinder.

In Fig. 2, J is a rotary engine, which turns the shaft L for the purpose of winding up the chain M. N is the hook for attaching the load. K is a band-wheel for stationary purposes. O is the boiler. I

In Fig. 3, R is the guiding-wheel; U, the caster-post. P is the disk, bearing the eccentric slide V, that engages the cogs. The shaft S turns the disk P by means of the handcrank X. T is the slide that throws the cocentric slides V in and out of gear.

In Fig. 4 is shown the adjustable foot for the purpose of preventing the leg from sinking in soft ground.

In Fig. 5, E is the endless chain, carried on the pulleys F, to which the leg B is attached at D.

with a traction-engine, substantially as de-' scribed, and for the purposes set forth.

4. I claim thecombination of the bandwheel K upon the shaft L, revolved by its cranks, in connection with the cylinder Y, substantially as described, and for the purposes set forth.

5. I claim the combination of a caster.

wheel, R, with its frame and post U, with the eccentric slides V upon the disk 1?, and shaft S, slide T, and crank X, arranged substantially as described, and for thejpurposes set forth.

6. Iclaim an adjustable foot, made in the manner described, and for the purposes set forth.

DWIGHT (J. PIERCE.

Witnesses:

J. PARSONS, O. M. PHELPS.

What I claim as new, and desire to secure

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