US593476A - Furnace-valve for hot-blast stoves - Google Patents

Description

(No Model.) zsheecs-sheet 1. J. KENNEDY. EURNACE VALVE EUR EOT BLAST STOVES No. 593,476. Patented Nov. 9,1897.

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J. KENNEDY. FURNAGE VALVE FOR HOT BLAST STOVBS. i No. 593,476. Patented Nov. 9, 1897.

WITNESSES E INVENTOR UNITED STATES v PATENT OFFICE.

JULIAN KENNEDY, OE PITTSBURG, PENNSYLVANIA.

yFUFtNACE-VALVE FOR HOT-BLAST STOVES.

SPECIFICATION forming part of Letters Patent N o. 593,476, dated November 9, 1897.

Application filed August l5, 1896.

To @ZZ whom, itmay concern.:

.Be it known that I, JULIAN KENNEDY, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Furnace-Valves for Hot-Blast Stoves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l shows my improved valve in plan view, the valve-Casin g being in horizontal section. Fig. 2 is a vertical section on the line II II of Fig. 1 and Eig. 3 is an end elevation of the valve, the casing being shown as in section on J[he line III III of Fig. l.

The valve is principally designed for use in hot-blast stoves.

2 is the gas main or flue, in which the valve is inclosed. v

3 is the valve-seat, consisting of an annular metal casting with hollow rim, through which water may be caused to iiow for the purpose of cooling the seat, and the seat is confined between sections of the flue 2 between metal castings 4 5, the castingforming part of the valve-casing. v

6 is the valve, composed of a metal disk adapted to slide horizontally to and from the seat 3, the valve-casing extending laterally for that purpose and having an external and removable cap 7. Raised ribs or ridges 8 are formed on the valve-casing to constitute slides upon which the disk may move. For the purpose of moving the disks I employa rotatory shaft 9,which extends vertically through and into the casing and through a stuffingbox l0, which may be packed, so as to prevent the escape of gas. Vithin the casing this shaft is keyed to the horizontal crank-arm ll,

Serial No. 602,828. (No model.)

having at the end a connecting rod or link 12, pivoted to a pin or stud 13 at the center of the valve, so that when the shaft 9 is rotated by a suitable lever oi' handle at the exterior of the casing it will swing the crank-arm l1 radially and will move the valve-disk horizontally, as indicated by full and dotted 'lines in Fig. l, the full lines showing the position of the valve when open and the dotted lines showing the same when closed.

To prevent upward movement of the valve when closed if blast were inadvertently admitted beneath it, I provide a series of lugs 14, which project inwardly from the casing and serve to hold the valve in place.

The stung-box l0 is formed at the plane of division between the cap 7 and the body of the valve-casing, so that on removing said cap the stuffing-box will be exposed. The parts are thus rendered easy to assemble, and a gas-tight connection can readily be made. This is a point of substantial advantage.

In a furnace-valve, the combination with a sliding valve and valve-casing, of a rotatory operating-shaft extending through a stu fngbox into the casing, a crank-arm having a link connection contained within the easing and serving to transmitmotion from the shaft to the valve, and a removable cap for said casing, the division-line between the cap and casing extending through the stuffing-box; substantially as described.

In testimony whereof I have hereunto set my hand.

` JULIAN KENNEDY. Witnesses:

G. I. I-IoLDsHIP, H. M. CoRwIN.

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