US858442A - Gas-saving or pressure-equalizing valve. - Google Patents

Description

.N0. s5s,442. 'PATENTED JULY 2, 1907.-

I 7 J. G GAS SAVING 0R PRBSSUR UALIZING VALVE.

PPPPPPPPPPPPPPPPPPP 6, 1905.

OW W Elli! UNITED STATES PATENT OFFICE.

JAMES COWIE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO NATIONAL GAS SAVING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GAS-SAVING OR PRESSURE-EQUALIZING VALVE.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed Novembe 6, 1905. Serial No. 286.016.

To all whom it may concern:

Be it known that I, JAMEs CowIE, a subject of the King of England, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Gas-Saving or Pressure-Equalizing Valves; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in equalizing valves of that class adapted to be connected'in the sup ply pipe for illumination or other gas to regulate the pressure and consequently the delivery at the outlet.

Heretofore in devices of the class described multiplicity of parts have usually been employed which must co-operate to produce the desired result and in many instances very trifling defects or imperfections or variation in the adjustment have been sufficient to prevent the successful operation of the device. Furthermore owing to the many parts employed such valves have usually been quite expensive.

The object of this invention is to provide a cheap, simple, durable and positively operating gas saving or regulating valve of very few parts and those so simple and inexpensive in construction as to be quickly assembled and adjusted to operate at any desired pressure.

The invention consists in the matters hereinafter described and more fully pointed out and defined in the appended claims. I

In the drawings: Figure 1 is a longitudinal vertical section of a device embodying my invention. Fig. 2 is a section taken on line 22 of Fig. 1. Fig. 3 is a section taken 011 line 3-3 of Fig. 1.

As shown in said drawings: A indicates a casing of cast metal or any suitable material having in its'top a relatively large pressure chamber a surrounded as shown at its top with an annular channel (1 adapted to contain mercury or some other suitable non-freezing and non-volatile liquid. The outer walls of said casing extend upwardly above said chamber and said channel affording a peripheral flange a upon which is fitted a chambered cap A which is engaged thereon by a set screw (1 At opposite ends of said casing and at approximately the middle of the same is an internally threaded outlet aperture a, and an internally threaded inlet aperture a and as shown in the bottom of the casing 'is provided a drainage chamber a in open communication with the outlet pipe or andfrom the bottom of which opens an internally threaded aperture (1 corresponding with the outlet aperture and adapted for connection either with a drainage pipe or closed normally with a plug a as preferred. I

As shown the interior of the casing is cored to afford open communication between the pressure chamber and the outlet pipe and between the drainage chamber and the outlet pipe or aperture a and a central seat is provided between the pressure chamber and the drainage chamber in which fits the inlet casing B, which is thus wholly inclosed in the casing A and apertured in its side to communicate with the inlet aperture a Apertures are provided in its top and bottom wall as shown in Figs. 1 and 2, which as shown are circular and the relatively sharp edges of which serve as valve seats.

A float C forms the top of the pressure chamber and comprisesa sheet of metal pressed to afford a closed head and a peripheral downturned flange c, which fits into the annular channel a, and is of a length to extend to the bottom of the same.

Depending centrally through the pressure chamber and through the inlet casing B, is a valve ste n C threaded at its lower end. Adjustably carried on said stem within the casing B and positioned to close the aperture in the top thereof is a valve closure 0 and below said casing and positioned to close the aperture at the bottom wall thereof is a valve closure 0 both of said closures are conical or tapered in form and are adjustably secured on said stem by means of nuts one engaging above and one below each of said closures. As shown also a strap of metal 0 is secured on the lower wall of said inlet casing and acts as a guide for the stem' 0 which extends through the same. On the top of the float C are one or more weights C sufiEicient to hold the float at its lowest position with the valves open when the pressure in the pressure chamber is below that for which the valve is set. Said weights may be of any desired shape or -material as shown however the same are leaden or other disks which fit over the upwardly extending end of the stem and are thereby held in place.

The operation is as follows: The float is adjusted by means of said weights C to yield to a pressure greater than that desired to be maintained in the delivery end or at the fixture. Should inlet pressure not exceed said desired pressure there will of course be no movement in the valve and the gas will flow through the casing C to the outlet (1 Should the main pressure increase to a point greater than that for which the valve is set the float is lifted closing or partly closing the valves until the pressure is again approximately normal. The valve closures c c being of equal size afford'together a balanced valve so that the pressure in the inlet chamber is always equalized thereon and the opening and closing of the same is thereby controlled wholly by the pressure acting on' the float. Any water, tar or other liquids or vapors contained in the gas will be condensed and will flow into the drainage chamber and may be readily drained from the regulator by removing the plug a V Obviously the casing and the valves therein may be varied in form and many other details of construction may be varied Without departing from the principles of my invention.

I claim as my invention:

1. In a device of the class described the combination with a casing having an upper and lower chamber and a restricted passage connecting the same, oppositely disposed alined inlet and outlet ports opening into the casing, opposite said passage, a seat in said casing at the lower end of the passage, a removable inner casing seated in said passage on a plane with the inlet and outlet ports and opening into the inlet port, ports in the inner easing opening one into the upper and oneto the lower chamber, a stem extending through said ports, valves on said stems one for each of said ports, an annular channel in the top of the casing and a float having downturned sealed edges and rigidly engaged to the stem adapted to regulate the supply.

2. In a device of the class described the combination with a casing, having inlet and outlet orifices, and said casing having a narrow passage near the middle thereof, a seat near the lower end of said passage, an inner casing removably engaged in the casing and seating on said sent affording a partition to divide the first mentioned easing into a plurality of chambers and affording a chamber intermediate said chambers, ports aifording communication between the intermediate chamber and the first named chambers, a stem projecting thercthrough, closures on said stem, one for each port, an annular chamber at the top of the first named casing, a float having its edge sealed therein and dividing the upper chamber into a plurality of noncommunicating chambers, a weight engaged to the stem, and a removable guide engaged to the inner casing to guide said closures to seat on said ports.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

' JAMES COWIE. Witnesses:

\V. W. WI'rHnNBuny, WM. C. SMITH.

Images