US689832A - Gas-reversing valve. - Google Patents

Description

(No Model.)

IFT-' will Patented Dec. 24, |90I.

GAS REVERSYINGfVALVE (Applicatn med Aug. 1s, 1901.

2 Sheets-Sheet I.

' No. 639,832. y minimum-24, 190|.v

l|:. J. w. RICHARDS &' R. MARSHALL.

GAS REVEBSING VALVE. (Application alga Aug. 1R, 1901.) (llo Model.) 2 Sheng-Sheet 2.

.Pl-TE M Ih E L Il E mi l 1W f' hi wfg.. i I l I Il" 1W UNITED STATES PATENT OFFICE.

EDGAR JOSIAH WINDSOR RICHARDS, OF GLENGARNOCK, AND ROBERT MARSHALL, OF KILBIRNIE, SCOTLAND.

GAS-REVERSING VALVE.

SPECIFICATION fO-mhg part Of Letters :Patent N0. 689,832, dated December 24, 1901. Application led August 13, 1901. Serial No. 71,912. (No model.)

To @ZZ whom it may concern:

Beit known that we, EDGAR J osIAII WIND- SOR RICHARDs,a resident of Cottage, Glengarnock, and ROBERT MARSHALL, a resident of Ellangowan Cottage, Kilbirnie, Scotland, subjects of the King of the United Kingdom of Great Britain and Ireland, haveinvented an Improved Gas-Reversing Valve for Sie.- mens Furnaces and the Like, of which the following is a specication.

This invention relates toan improved valve for use with Siemens furnaces, gas-tired heating-furnaces, and for use generally where it is desired to reverse the direction of flow of gas through mains or flues, and has for its object to provide a valve having no mechanically moving or operated parts exposed to the deleterious action ofthe gases, such as is the case with valves as hitherto constructed, whereby the valve is maintained perfectly tight in use and its life lengthened. To attain this end, our improved valve is provided with four chambers, each fitted with a bridge or diaphragm, so arranged that the said several chambers can be each water-sealed. In use only two of the said chambers are sealed, the path of the gas-through the valve being then by way of the two unsealed chambers.

To reverse the direction of flow of gas through.

the Valve, the two formerly-sealed chambers are now unsealed and the formerly-unsealed chambers sealed, means forthe sealing and unsealing of the chambers being hereinafter described.

As an example of the method of carrying our invention into effect, We may employ an 4 vouter casing of any convenient shape and arrange the four internal chambers in pairs one above the other, (but they may be otherwise 'arranged,) so that the diaphragm or bridge of each of the lower chambers may depend from the bottom of the upper chambers. The gas-inlet is preferably situated between the upper pairvof chambers. and the outlet between or below the lower pair, the space between the upper chambers being rendered gas-tight. VVhemtherefore,l one diagonal pair of chambers is sealed, the gas passes through the highermost of the other diagonal pair to (in this example) the heated regenerator, then through the regenerator to the f urnace,where it is mixed with heated air from another regenerator and ignited. The waste gases after passing through a second pair of regenerators" to heat same are led through the lowermost of the unsealed diagonal chambers and thence to the chimney. By unsealing this diagonal pair of chambers and sealing the other the gas is caused'to take the opposite path.

The essential feature of our invention is the provision of the chambers and the sealing and unsealing of an alternate pair, the means for performing. such sealing and unsealing being capable of attainment in various ways.

- Inl order that -our said invention may be more readily understood and easily carried uinto effect, we will proceed. to describe the same with reference to the accompanying drawings, in which- Figure l is a front elevation showing our improved gas-reversing valve applied to a Siemens furnace. Fig. 2 is a vertical longitudinal section .through the apparatus.

In the carrying out of our invention we employ an arrangement of four water-sealed valves A, B, C, and D, which are carried on the casing E, which is preferably formed as a rectangular framing consisting of the recl tangular-shaped hollow or tubular portion E, join ted together by the anges e. Depending from the inside of the casing E into the said valves are diaphragms E E2 E3 E4, which cause the gases to pass under them when the valves A B are not water-sealed. Connected at the one side and near to the bottom of the said valves are the pipes A B' C D', the other side of the said pipes being connected to the wa` ter-cylinders F and G at their ends F F2 G2, so that the cylinder F governs the supply of water to the valves A and D, the other cylinder G governing the supply of water to the Valves B C. One diagonal pair of valves are always actuated simultaneously, whether it be for sealing or for allowing the passage of the gases through the regenerators H to the furnace J and passing out at the iiuej.

For operating the water-cylinders F and G we employ a hydraulic cylinder K and connecting-rod L, mounted on the standM, (between the said water-cylinders.) The cou- IOO pled connecting-rod L is connected to the piston-blocks within the water-cylinders F and G. The action of the said hydraulic ram is to force the water out of the water-cylinder F into the valve A through the medium of the pipe A', the water seal for the valve B being simultaneously actuated by the watercylinder G. The same action is eiected with regard to the valves C D only on the return stroke of the connecting-rod. We may employ a hand-lever for operating the hydraulic ram, or we may have same operated by a lever which may be coupled to a rocking shaft.

In order that the passage of the gases may be readily understood, the same is indicated by the arrows in Fig. l, the gases coming into the casing E from the producer at Eand passing down 'the connections to the furnace J, as shown.

We claiml. In a gas-reversing valve, the combination with four chambers arranged in pairs, water-cylinders connected to said chambers in pairs, and means for withdrawing the Water in one pair of chambers and discharging it into the other pair of chambers to reverse the direction of flow of gas through the valve, means for preventing the passage of gas through the chambers in which the Water is present, openings for the admission of air or gas into the chambers and outlets therefrom to the stack-flue.

2. In a gas-reversing valve, the combination with four chambers, arranged in pairs diagonally disposed, water-cylinders connected to said chambers in pairs, means for withdrawing the water in one pair of chambers and discharging it into the other pairs of chambers to reverse the direction of flow of gas through the valve, means for preventing the passage of gas through the chambers in which the water is present, openings for the admission of air or gas into the chambers and outlets therefrom to the stack-flue.

3. In a gas-reversing valve, the combination with four chambers arranged in pairs diagonally disposed, diaphragms extending vertically into and above the chambers, watercylinders connected to said chambers in pairs, means for withdrawing the water from one pair of chambers and discharging it into the other pair of chambers to reverse the direction of iow of gas through the valve, openings for the admission of air or gas into the chambers and out-lets therefrom to the stack-due.

` EDGAR JOSIAII WINDSOR RICHARDS.

ROBERT MARSHALL.

Witnesses:

JOHN LAMONT, JAMES BRODIE.

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