US361684A - William e - Google Patents

Description

(No Model.)

W. R. FIELD & L. E. HGGUE.

OUT-OFF FOR GAS. No. 361,684. Patented Apr.- 26, 1887.

UNITED Srn'rns ATENI Fries,

WVILLIAM It. FIELD AND LOVREN EDKVIN HOGUE, OF GREENVILLE, PA.

CUT-OFF FOR GAS.

SPECIFICATION forming part of Letters Patent No. 361,684, dated April 26, 1887.

Application filed December 4, 1886. Serial No. 220,717. (No model.) v

To a whom it may concern.-

Be it known that we, WILLIAM R. FIELD and LovREN EDWIN HOGUE, citizens of the United States, residing at Greenville, in the county of Mercer and State of Pennsylvania, have invented acertain new and useful Improvement in Out-Offs for Gas; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing, making a part of this specification, and to the letters and figu res of reference marked thereon.

The present invention has. relation to that class of valves provided with a push-pin at the bottom of the valveshell, for the purpose of 7 opening the valve to form a waste,and a spring to automatically force the pin or stem back into position. In this class of valve it has been common to provide a single valve-stem with two valves, which coacted,when the stem was operated,to open and close the valve-passages; also,providing a stem at the top of the valve-shell, adjustable therein, to limit the movement of the stem carrying the valves.

It is the object of the present invention to the shell or body of the valve, provided with the usual interior screw-thread for connecting thereto the screw-threaded ends of the pipesection, and also screw-threads at its top to receive the dome B, which may be of the usual construction, and is provided with a suitable stuffingbox, a, through which passes the screw-threaded stem b, having at its upper end a hand-wheel, O, for turning it.

The dome B is cast with a guide, a, through which passes the end of the stem (1, which is provided with a valve, D, at its lower end,

which rests on the valve-seat 6. Some distance above the valve D is a second valve, E. The lower or bottom portion of the shell A is cast with an interior screw-threaded extension, F, in which is inserted a suitable stuffing-box,f,

through which passes a stem, G, having a ta peringend, g, and shoulder h, and around this tapering end of the stem is located a spiral spring, H, the lower end of which rests upon the shoulder.

When screwing down the stem b,the'end thereof will strike the upper end of the valvestem cl andforce the valves D E into position, as shown in full lines, which practically closes the former one of said valves, while the valve E is left open.

- It should be noticed that the action. of the stem Gis the same as that of a push-pin to open the valve in order to form a waste, and when the stem is forced up by pressure to open the valve the spring will force it back into position. I

Immediately above the valve-seat e is a partition or diaphragm, I, which keeps the gas when entering at azfrom passing down through and into the passage '5 and the outlet y. This partition or diaphragm is not attached to the valve-stem d, but, on the contrary, admits of the stem and valve thereof moving up and down without moving'the partition or diaphragm from its seat I; but when the valves and stem are taken out or removed from the shell A the partition or diaphragm comes with them, the same hanging loose on the stem between the two valves, and also forms a guide for the stem. It will be noticed that the valve E does not come down close upon its seat, but

extends above some little distance, as shown in the drawing.

The gas passes from the pipe into the valveshell, as indicated by the arrow, the gas in its course passing through inlet 00 into the valve shell or chamber at above the valve E, and thence through passage 2' to the chamber a above the valve D. The stem 6 is raised up clear of valve-stem d, as shown, and the stem G is pushed up until it strikes valve D,which opens it and allows the gas above said valve to pass through the valve-opening and out through the outlet y, causing a continuous circulation of the infiowing gas. By pushing the stem G still higher, the stem (1 will carry with it the lifting-valve E to close the space between the inlet 00 and chamber m, the pressure of the gas carrying it up to the position as indicated by dotted lines, when it is then in working order.

It should be understood that the push-pin or stem G only carries the valve E into the space which forms a communication between the inlet a; and chamber m, so that should there be no pressure of the gas the valve would not open, as the push-pin or stem is forced back into position by the spring H, which allows the valve D to drop back onto itsseat and re main closed against all pressure, the pressure only tightening the valveagainst theseatr It will be also noticed that the valve cannot be opened or remain open an instant without pressure and consequent circulationof gas.

When the valve D is open,the stem b can be forced down in contact with the valve-stem, which will force the valve E partially into the ingress opening or chamber-m, reducing the firein proportion as the chamber is closed; but when the valve E is forced below the ingress 1 opening or chamber, or at the bottom thereof, it drops to the position shown in the drawing, no matter how great the pressure of the inflowing gas.

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

In a gas or other valve, the shell A,provided with double passages i y at the discharge end or side thereof, and the chambers mmdivided by means of the diaphragm I, in combination with the stem d, carrying the valves D E, the screw-stem b, and push-pin G, substantially as and for the purpose set forth. 1

In testimony that we claim the above we have hereunto subscribed our names in the presence of two witnesses.

WILLIAM R. FIELD. LOVREN EDWIN HOGUE.

Witnesses:

R. MAXWELL, O. A. HOUSE.

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