US567395A - Steam-shovel - Google Patents

Description

f 3 Sheets-Shed 1.' G. W. KING. STEAM SHOVELV (No Model.)

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(No Model.)

' G. W". KING.

STEAM SHOVBL.

'Patented' Sept. 8. 1896.

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' e. W. KING, STEAM SHOVBL.

Patented Sept. 8, 1.896. ZJ?- UNITED STATES GEORGE w. KING,

YPATENT* OFFICE,

OF MARION, OHIO.

STEAM-SHOVEI..

SPECIFICATION forming part of Letters Patent No. 567,395, dated September 8, 18,96. Application filed March 26, l891. Serial No. 386,563. (No model.)

To all whom/'it may concern.-

Be it known that I, GEORGE W. KING, a

citizen of Marion, in the county of Marion and State of Ohio, have invented'certain new and useful Improvements in Steam-Shovels; and I do hereby declare the following to bev a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in excavators or steam-shovels, and more particularly to improved devices for handling and thrusting the dipper or shovel. Heretofore in the manufacture of steam-shovels or excavators it has been customary to take the power for handling and thrusting the shovel from the hoisting-chain, which does not move except when the bucket is going up or down. It has also been proposed to place a pair of engines on the crane, and in some cases steam cylinders have been employed in order that the craneman could thrust the dipper-handle in or out independently of the movement of the hoisting-chain.

It is the object of my invention to overcome the objectionable features of such prior constructions and to lessen the cost of producing mechanism for the accomplishment of the purpose stated. K

A further object is to provide simple and eiiicient means whereby the dipper of a steamshovel may be under the control of the operator, and whereby the power to handle or thrust said shovel or dipper shallbe derived from the main source of power independently of the raising-chain; and the invention consists in certain novel features of construction and combinations and arrangements of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure l is a side elevation of a steamushovel embodying my improvements. Figs. 2 and 3 are enlarged plan views representing the entire machine broken in themiddle for convenience in illustration, and Figs. 4 and 5 are details.

A represents a car, on the forward end of which a turn-table Bis mounted on a hollow shaft C. A boom or crane D is pivotally mounted on the turn-table, in any approved manner, and may be composed of two longtor shovel-handle E is adapted to pass and provided at its lower end with a shovel or dipper F. Mounted on theboom orv crane D, preferably about midway. between its ends and in close proximity to the beam or handle E, is a shaft b, on which pinions c are mounted and adapted to mesh with a rack-bar d on the handle E. Gear-Wheels G are secured to the ends of the shaft b and are adapted to mesh with pinions f on'the ends of a shaft g.

Keyed or otherwise secured on shaft g is the female section g' of a cone-clutch. This section has a conical recess or cavity formed on each side, and a pair of cones or male sections h', loosely mounted on shaft g on each side of section g', are adapted to alternately engageand disengage the female section, accordingly as it is desired to turn the shaft forward or reverse it. Sheaves h h are secured to the cones, and over these sheaves the endless chain K K passes, so that they always rotate in opposite directions. The cones are shifted on their shaft by means of cam sections h2 h3. The cams h2 are fixed to some stationary part of the machine, while the cams ha are adapted to be rocked back and forth, in order to throw one cone into engagement with the section g' and the other out of engagement, as the case may be, to raise or lower the shovel or dipper. This shifting of the cams is done by means of a hand-lever j, which is connected to arms on the movable cams h3 by rods t" t. A sheave l is mounted over the turn-table, and a sheave 2 mounted beneath said turn-table. A counter-shaft H is mounted in suitable brackets beneath the car and geared with the main driving mechanism I, this shaft H being also provided with a sprockets sheave H. The counter-shaft H is geared with the sprocket= sheaves 7i by means of a chain K, said chain being run as follows: Said chain runs over the sprocket-sheave Hon the countersh'aft H underneath the car, then over sheave 2, through the hollow shaft O, over sheave 1, over sheave h,turnin g or driving the frictionclutch, which is loose on the shaft. The chain then passes back over an idle-wheel or tightener 3, and then up around the other sprocket-sheave h, and thence back by the i tudinal timbers c c, between which. a beamy same way it came to the counter-shaft under the car. seen that the frictional devices on the shaft g are made to rotate in reverse directions, and that by throwing either of them in contact with the part keyed to the shaft said shaft can be made to rotate in either direction, thus causing the dipper or shovel to be thrust in or out. Vthen both of the frictionalv devices are disengaged, the motion of the dipper-handle can be controlled by the ordinary brake-band, which holds the dipperhandle at any point desired, and can be operated in the usual way. The mechanism thus far described is for feeding the shovel or dpper in and out; but in addition to it means is provided entirely independent there- 0f for hoisting and lowering the shovel or dipf per. This consists of a chain or cable Q,whch is secured to the shovel or dipper, passed over pulley q on the outer end of the boom, thence back tothe shovel or dipper, up again over pulley q", under pulley q?, over pulley f1.3, and finally toa drum on the shaft H3, which imparts motion to the shaft H.

It is evident that slight changes might be made in the details of construction of my invention without departing from the spirit thereof or limiting its scope, hence I do not From this arrangement it 'Will be` with said handle, a shaft carrying pinions tomesh with said gearing, sheaves loose on said shaft, clutches also on said shaft, means for manipulating said clutches, a counterfshaft connected with the main source of power, and

4a chain passing over said sheaves and the counter-shaft, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

GEO.; XV. KING;

Titnesses JOHN A. WALFORD, JOHN G. GOMPF.

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