US508024A

US508024A - Furnace

Info

Publication number: US508024A
Authority: US
Publication date: 1893-11-07
Anticipated expiration: 1910-11-07

Description

(No Mael.) i

H. B. A. KBISER 8E C. M. SCHWAB. FURNAGE.

No. 508,024. Patented Nov. 7, 1893.

-I NIM-Q AWI'I'NESSES I INVENTORS l l dau/M7 .Q-'GMM- lmunnmn. n, c.

UNITED STATES PATENT OFFICE.

HENRY E. A. IIEIsER AND CHARLES M. SCHWAB, or BRADDoCK,

, PENNSYLVANIA.

FU RNAC E.

' SPECIFICATION forming part of Letters Patent No. 508,024, dated November 7, 1893. Application filed November 25, 1892. Serial No. 453.106. (No model.)

To all whom, it may concern:

Be it known that We, HENRY B. A. KEIsER and CHARLES M. SCHWAB, both of Braddock, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Furnaces, of which the following is a full, clear, and exact description.

Heretofore, soaking-pits and pit-furnaces for heating ingots have been vertical, and in order to insert and withdraw the lingot or other pieces to be heated, the operator has been obliged to station himself directly above the mouth of the pit, in order that he may observe the ingot and direct the attachment of the lifting-tongs thereto. When the door of the furnace is open, the outrush'rng heat and llame are so intense as to make such position tolerable only for a very short time, without intermission, and as the blinding glare makes the attachment of the tongs'difiicult in-discharging the furnace, several attempts must often be made before the piece can be grasped and withdrawn.

The overhead traveling cranes which have recently come into general use for charging and discharging furnaces of this class, require not only that the operator, but the working parts of the crane and tongs also should be vertically above the mouth of the furnace. Under these circumstances, the discomfort is almost intolerable, and the heat seriously injures and eventually destroys the machinery. The latter evil is especially noticeable in its effect upon the more delicate machinery of electric traveling-cranes.

The object of our invention is to obviate the diiculties above named, and it consists in forming the heating-furnace or pit, not vertical but inclined and with its lower end adapted to support the end of an ingot. The operator of a swinging crane then stationing himself in line with the pit is not directly above the mouth of the same, but is at one side thereof, and is not so much affected by the rising flames and hot air. The tongs or metal-gripping apparatus are preferably introduced into the furnace in the inclined line thereof. The operator can therefore see the metal piece, and without the guesswork attending the operation of the vertical furnaces, can grasp and withdraw the same with cer- 3 is the door which is adapted to cover the furnace and is moved by suitable means such as a hydraulic motor 4:.

5 6, are usual regenerator chambers, and 7 and 8 are ports used alternately for the admission of gas and air and the egress of the.

products of combustion.

The lower end of the ingot rests upon the bottom of thefurnace and is supported thereby; and in order to permit the ingot to be heated rapidly, the side of the furnace is recessed to permit circulation of the heated products of combustion. Our improved furnace is easily distinguishable from horizontal furnaces in common use heretofore, in which the furnace-bottom is often made with a slight inclination for the purpose of draining oif the slag, for inourfurnace theingot is supported at its lower end by resting on the furnacebottom as do the ingots in a vertical furnace, and the inclination of the pit accomplishes a functipn explained above, which is quite different from that performed by any other prior construction.

Modilications in the structure and arrangement of the parts of the furnace may be made without variance fromour invention, since In a heating-furnace, a heating pit or chamber, having an upwardly directed charging opening, and inclined sides, and having its lower end adapted to support the end of an ingot; substantially as described.

In testimony whereof we have'hereunto set our bands.

HENRY B. A. KEISER.

CHARLES M. SVCHVVAB.

Witnesses:

O. E. REINHARDT, W. H. CORBETT.