US705618A - Valve for heating-furnaces. - Google Patents

Description

No. 705,6l8. Patented July 29, i902. W. F. SHICK, R. J. LEHMAN .l I. J. WALKER.

VALVE FOR HEATING 'FURNACESI (Application filed Apr. 28, 1902.)

` (No Model.)

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WILLIAM E. sHioK, ROBERT J. LEHMAN, AND IsAAo J. WALKER, or DUQUEsNE, PENNSYLVANIA.

VALVE FQR HEATlNG-FURNACES.

SPECFCATION forming part of Letters Patent `No. 705,618, dated July 29,' 1902.

Application filed April 28, 1902. Serial No. 104,905. (No model.)

1o had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in valves for soaking-pit furnaces such as are employed for imparting an even temperature to billets previous to passing the same to the rolls to be worked into shape.

In the manufacture of billets it is the practice to employ what is termed a soaking-pit furnace, in which the billets are placed and zo wherein the mass of metal contained in the billet is rendered to substantially the same temperature throughout in order that the same may be properly rolled. These furnaces have flues leading to the exterior of the buildin gin 2 5 which the furnaces are located, one of which lues is always open for the admission of air' and the other of which flues is closed or covered by a valve. These valves as heretofore constructed last but a short time, owing to 3o the intense heat to which the saine are subjected burning them out. It is the object of this invention to overcome this difficulty by constructing a valve kept comparatively cool or at least in such a state as to prevent the as will be hereinafter further` explained.

4o Briefly described, the invention consists of a valve embodying an inner and an outer casing,with a space therebetween to receive Water for maintaining the valve in a comparatively cool state. y, The outer casing is provided with an opening in its top, and means is connected to the valve for shiftingthe same to different positions, so as to cover the lines desired, and this construction, together with the other details entering into the invention,

5o will be hereinafter more specifically described claim.

In describing the invention in detail refererence will be had to the accompanying drawings, forming a part of this specification, and wherein like numerals of reference will be employed to designate like parts throughout the several views of the drawings, in which- Figure l is a central longitudinal sectional view of our improved valve.V Fig. 2 is a transverse vertical sectional View thereof. Fig. 3 is a longitudinal sectional View showing the device in position.

In connection with soaking-pits it is customary to provide two gas-inlets leading to opand then particularly pointed out in the posits-sides of the soaking-pit furnace and i through which the gas is admitted alternately, so that both sides of the furnace may be fired to the same degree of heat. These two gas inlets or iiues are alternately in communication with the stationaryiiue leading to the stack, which is generally located outside the building.

"We have shown in Fig. 3 how our improved valve is placed in position over the ues, though have not shown the soaking-pit furnace, as our invention resides entirely in the construction of this valve and in the mode of keeping the same `in a comparatively cool state. In Fig. 3 we show the gas-nues a and b and a flue o, which is in communication with the stack or chimney. (Not shown.)

Our improved valve is so Aplaced in position I 'as to establish communication either between the iues u, and c orthe iiues c and b, and it consists of two casings d and e, the latter within the former, with a space f therebetween adaptedto receive and retain water for keeping the valve from becoming unduly heated. These casings are secured together by the cross-bar g, which serves to seal the space at the lower end, and they. are braced `by the crossbars h and 7r,`the latter extending across `the space within the inner 'casing at .the lower edge thereof centrally ofits` length.

The casing CZ isprovided at `itstop with a suitable opening Z, and also carries on its outer casing at each side of the opening shafts or axles m, which protrude beyond the valve at one side thereof to receive the forked IOO upper ends of the levers n, pivoted at their lower ends at any suitable point, and one of which 'is provided with a crank o, so that the valve may be operated to shift from its position, as shown in Fig. 3, into a position to establish communication between the ues c and b. These valves are generally surrounded by an outer casing p, which is provided with a valve q of any approved form of construction, the purpose of which is to regulate the quantity of air admitted within the casingp. In order to supply water to our improved valve,weprovide supply-linesrand rthrough the outer casing p.

When the valve is in position to establish communication between the lines ce and c, the

supply through the pipe fr' may be cut off by acock or other suitable means, and when the Valve is in position to establish communication between dues c and b the supply through the pipe 7 may be out off in a similar manner. It is preferable to provide a double flange t around the openings of the llues a, b, and c, within which double ange the Valve is seated, so that the water lying within the space inclosed by the casing p will not flow into the lines, but will be drained off through the suitable opening u. Heretofore in the use of valves for this purpose they have generally been constructed of a single sheet of metal, which soon becomes warped, owing to the intense heat to which it is subjected, requiring the replacing of a new valve. By

constructing the valve so as to be filled with water at all times this danger is entirely ob- Viated and the length of life of the valve is materially increased. When the gas is shut olf from flue a and turned on flue b, so as to burn in the opposite side of the furnace, the valve is shifted from the position shown in Fig. 3, so as to rest over the ilues c and b.

In the practice of our invention it will be noted that various changes may be made in the details of construction without departing from the general spirit of our invention, the main principle being the provision of the water-cooled valve in connection with soaking pit furnaces.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

A valve for soaking-pit furnaces, comprising two seinicircular casings with a Waterspace therebetween, the outer casing having an opening in its top, cross-bars at the top and bottom of said casing for spacing the same apart, and means connected to the outer casing for shifting the valve longitudinally, substantially as described.

In testimony whereof we affix our signatures in the presence of two witnesses.

WILLIAM F. SHICK. ROBERT J. LEHMAN. ISAAC J. WALKER.

Witnesses: FRED GERDTs, WILLIS DoNEY.

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