US267819A - Feeding device for blast and other furnaces - Google Patents

Description

(No Model.)

W: H. ALLEN.

FEEDING DEVIGE FOR BLAST AND OTHER FURNACES; No. 267,819. Pate'ntedNov. 21, 1882.

N PETER MOI-Rhognphur. Walhinpon. D.C.

. UNrT D STATES PATENT rrren.

WILLIAM H. ALLEN, OF PITTSBURG, PENNSYLVANIA.

FEEDING DEVICE FOR B LAST AND OTHER FURNACES.

SPECIFIGATIONforming part of Letters Patent No. 267,819, dated November 21, 1882.

7 Application filed October 31, 1881. (N modehi To all whom it may concern:

Be it known that I, WILLIAM H. ALLEN, of

' Pittsburg,countyofAllegheny, State of Penn sylvania, have invented or discovered a new and useful Improvement in Feeding Devices My present invention relates more particu larly to an improvement in the feedingappa- 'ratus of a blast, cupola, or other like furnace,

' wherein a cup and cone'or a bell and hopper tically so.

are employed.

My particular object is to enable the ordinary feeding or charging operations to be performed from the ground; and to this end I arrange immediately over the bell or cone an open-bottomed hopper, and so arrange it with reference to the bell or cone that charges of material for the blast-furnace, on being dumped or discharged into such added hopper, will be delivered through its open bottom onto the hell or cone at or near its apex, and consequently will pass down the sides of the bell or cone uniformly allvaround, and so will be distributed with practical uniformity around the annular receptacle formed at the junction of the helland lower hopper. Then,when the bell is lowered to discharge such material into the furnace, such charge will be supplied to the burden below uniformly all around, or pracw Then, by the addition of a chute from the elevator to such added hopper, and of a self tilting or dumping device, so that the car containing the material shall be automatically emptied into such chute, I enable the entire work of feeding to be done without the necessary presence of workmen at the top or mouth of the furnace to do or superintend the feeding.

B may represent a blast, cupola, or other like furnace, such as is adapted to or requires the use for feeding purposes of the ordinary or other suitable hopper or cup, a, and bell or cone b. Immediately over the hell or cone 1),

that a charge or a portion of a charge dumped into such added hopper 0 will slide down or fall onto the apex of the bell, or so near its apex as to be delivered or discharged there from through the opening 0 all around, and

slide down on all sides of the hell with practi cal uniformity as toqnantity, so that when the I bell is lowered the charge will be properly distributed to the burden below.

Such device may be used, and the material be dumped in from barrows by hand in the usual way; but I prefer to so organize the apparatus that the work of feeding may be done from the ground, and without the necessary presence of workmen for such purpose at the top or mouth of the furnace. To illustrate this I have shown an elevator, D, of any suitable construction, adapted to be operated from the ground, and to raise and lower a car, D, loaded with the material to be charged or fed into the furnace. Any suitable trip or tilting mechanism is to be added, such that when itreaches the proper. height it will be tilted, as shown, or its contents will be otherwise dumped into a chute, d, which is suitably constructed and arranged for discharging into the hopper c the materials so dumped upon it. As soon as the car is thus emptied it may be lowered in the usual way and at the'proper intervals. The bell b may also be lowered from below by the use of a Windlass, g, and rope g, and the usual interposed devices, g 7 y I have shown the Windlass, rope, 8m, on the side of the furnace opposite the elevator, but have done so only for convenience of illustration. For ease and facility of operation, the bell loweringand raising appliances should be arranged over and down such side of the furnace that they and the elevator can be worked from at or near the same point.

I am aware that it is not new, as in United States Patent No. 117,246, to duplicate in a blast-furnace the ordinary bell and hopper, and to give to each bell a separate motion, so that on the lowering of the upper bell a charge maybe dumped in the usual way onto the lower hopper and bell, (the latter remaining closed,) and so that after this is done the upper hopper may be closed and the lower hopper be opened by lowering the lower bell, so as to discharge the new charge onto the burden below; but this fails to embody my invention, in that, among other things, I make the upper hopper with a comparatively small opening, and arrange the bell in reference thereto so that when in its normal or raised position its apex shall be at or about the level of the hopper-opening, and thereby I insure the performance of the function indicatednamely, a uniform distribution of the charge, which, necessarily falling on the apex of the bell, will pass down with practical uniformity on all sides thereof.

I am aware that it is not new with me, broadly, to combine a self-dumping car with a blast-furnace, and hence I make no claim thereto otherwise than as an element in the combination, as hereinafter set forth.

I claim herein as my invention- 1. In a blast-furnace feeding device, the

combination of the lower feed-hopper,a, and go the upper feed-hopper, c, with the hell I) and mechanism for supporting and operating the same, the two hoppers constructed as described, whereby the bell, when raised, closes the bottom of the lower hopper, and has its 5 apex at or about the level of the bottom opening of the upper hopper, substantially as set forth.

2. A blast-furnace feeding apparatushaving in combination a lower feedliopper, a, an up- 40 per feed-hopper, c, a bell, I), mechanism for supporting and operating the bell, the two hoppers being con strueted as described, whereby the bell, when raised, closes the bottom of the lower hopper, and has its apex at or about 45 the level of the bottom opening of the upper hopper, and having also an elevator worked from the ground, a self-dumping car, and a chute, d, substantially as set forth.

In testimony whereof I have hereunto set my 50 hand.

WILLIAM H. ALLEN.

Witnesses:

EDWARD JAY ALLEN, R. H. WnITTLEsEY.

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