US239129A

US239129A - Crane

Info

Publication number: US239129A
Authority: US
Publication date: 1881-03-22
Anticipated expiration: 1898-03-22

Description

(No Model.)

D'.- H. WILLIAMS,

Gran-e.

Patented March 22 UNITED STATES f PATENT OF ICE,

DAVID H. WILLIAMS, OF HOMESTEAD, PENNSYLVANIA.

CRANE.

SPECIFICATION forming part of Letters Patent No. 239,129, dated,March 22, 1881.

Application filed January 18. 1881.

To all whom it may concern:

Be it known that I, DAVID H. WILLIAMS, of Homestead, in the county of Allegheny, and State of Pennsylvania, have invented a new and useful Improvement in Cranes; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a side elevation, partly in section,

. .Of my invention. Fig. 2 is a detached view of-a portion of the same.

Like letters indicate like parts wherever they occur. i a,

My invention has for its object a crane for carrying and'pouring molten metal; and it consists in a crane having a ladle or receptacle so arranged at the end of the arm of the crane that when the arm is raised the ladle is tilted, the spout of said ladle remaining upon the same horizontal plane during the whole of the tilting operation.

Heretofore in the process of manufacturing Bessemer iron and steel it has been customary to run the molten metal from the cupola or smelting-furnace into the converter through troughs, as it is necessary that there should be a steady stream of metal passing from the furnace to the converter; but as the molten metal is liable to cool and adhere to the edges of the trough, it is not always possible to determine the exact quantity of metal which passes into the converter, and as a consequence too much or too little spiegel-iron is often added during the process. By the use of my crane, however, the exact amount of metal poured into the converter may be determined, and the spiegel-iron added accordingly.

I will now describe my invention, so that others skilled in the art may manufacture and use the same.

In the drawings, a represents the cylinder of a hydraulic crane, on two opposite sides of which, extending upward, are the two standards or supports a. a. Between these, and in the cylinder a, is the piston-rod b. From the piston-rod b extends the horizontal arm or gib 0, supported by braces cl. The arm 0, as shown, consists of two bars fastened together at each end, leaving an open space between them. Ex-

(No model.)

tending downward from the end of the arm 0 is a double hook, c. On the hooks c is hung a pot,f, by two lugs, g. This potfis furnished with a spout, h. The said lugs g are placed on the outer surface of the pot f at points midway, or nearly so, between the bottom and top of the pot, so that the pot shall be pivoted at a point which will keep the spout h substantially upon the same horizontal plane as the arm 0 is raised, as is hereinafter described. On the bottom of the potfis an eye or ring, j, to which is hinged or fastened a bar, It, in a line with the arm 0. To the end of the bar is is fastened a chain or rope, I, which passes thence in a perpendicular line up to the arm 0 and over the twopulleys or wheels m m, which are placed between the bars which form the arm 0, or in such a manner as to keep the chain Z in a line with the middle of the cylinder at and arm 0. The chain l passes thence in a perpendicular line to and over the pulley or wheel a, fastened to and near the bottom of the cylinder at, and thence up again to the horizontal arm 0, where it is fastened.

The crane is pivoted in any suitable manner, so that the arm 0 maybe swung, as desired, from side to side, the end of the arm 0 traveling in the circumference of a circle. 7

The operation of the crane, as designed for use with a Bessemer converter, is as follows: The end of the arm 0 is brought to where the molten metal flows from the cupola-furnace into the pot f. I The hooks e are engaged in the lugs g, and the arm 0 is then swung around until the pot f is over the converter. The arm 0 is then raised by the power of the crane,which tautens the chain 1, raises the bottom of the pot .f, and tilts the spout; but as the body ofthe pot f is rising with the arm 0, the spout h is kept during the pouring operation on, or nearly on, the same horizontal plane. When the pot is empty the arm 0 is swung back to the cupolafurnace, and another pot of molten metal is By lengthening or'shortenin g the chain 1 the potf may be tilted at any height desired, according to the lift of the arm 0.

I have described my invention as well adapted for use in a Bessemer foundry; but it is equally well adapted to other'purposes where it is desired to move molten metal or other substance and pour the same steadily, keeping the spout of the vessel in substantially the same horizontal plane (1 urin g the pouring operation. Although I have described a particular form of crane to which my improvement is attached, Ido not desire to limitmyself to the same, as my improvement may be readily adapted to any form of crane now in use.

Another use to which the crane is especially adapted in a Bessemer foundry is for the purpose of cleaning the pots which are used for carrying the metal from the converter to the molds. These pots are apt to retain more or less of slag, which remains in the pots, which are heavy and have to be lifted in order to clean and empty out such slag. By the use of the crane they can be lifted and tilted, so as to enable the workman to do this work easily and effectually, the whole operation being conducted by and under the control of the boy in the pulpit, thereby dispensing with additional labor.

Instead of passing the chain, rope, or cord over the pulley at the floor and then back to and fastening it to the gib, it may be fastened to the floor, base of the crane, or other stationary part. The operation is substantially the same in either case.

The second pulley may be dispensed with.

What I claim as my invention, and desire to secure by Letters Patent, is

l. A crane having a vertically-moving gib and a bucket or other receptacle pivoted thereon, in combination with a rope, chain, or cord passing over a pulleyon the gib, and connected at one end to the bucket below its pivots, and at the other to the floor or other place, or to the gib after passing around a pulley on the floor, so that upon raising the gib the'bucket shall be tilted, the pouring-spout remaining in, or nearly in, the same horizontal plane, substantially as and for the purposes described.

2. In combination with a crane, the hooks e, pot or carrying-receptaclef, chain l, and Wheels or pulleys m, substantially as and for the purpose specified.

In testimony whereof I have hereunto set my hand.

DAVID H. WILLIAMS.

YVitnesses T. B. KERR, R. H. WHITTLESEY,