US761190A - Cut-off for gas-lines. - Google Patents

Description

PATENTED MAY 31, 1904.

G. BAGHMANN. GUT-OFF FOR GAS LINES.

, APPLIOATIOH FILED SEPT. 21. 1903 N0 MODEL.

wiztnmo Patented May 31, 1904.

PATENT OFFICE.

CONRAD BAOHMANN, OF ERIE, PENNSYLVANIA.

CUT-OFF FOR GAS-LINES.

SPECIFICATION forming part of Letters Patent No. 761,190, dated May 31, 1904. Application filed September 21, 1908, Serial No- 174,062. (No model.)

To all whom it. concern.-

Be it known that I, CONRAD BAOHMANN, a citizen of the United States, residing at Erie, in

the county of Erie and State of Pennsylvania,

hereinafter fully described, and pointed out in the claims. 4

The object of the invention is to provide a cut-off for gas-lines which will remain open during a normal pressure of gas, but will cut off the gas discharge when this pressure fails,

so that when the gas is again turned on it will,

prevent its passage.

panying drawings, as follows:

Figure 1 shows a central vertical section of the device; Fig. 2, an elevation of the valveoperating tube; Fig. 3, an elevation of the valve.

A marks the valve-chamber. This has the inlet a. The outlet-tube (0 extends up into the chamber. A flange (0 extends around the chamber opposite the upper end of the outlet a and a flange a extends outwardly from the top of the tube (0 forming a partial closure of the chamber at that point. Below the flanges a and a a receptacle A is provided for a liquid B, preferably mercury, which forms a liquid seal for the valve. Extending downwardly from the top A of the chamber is a guide-ring a The valve D operates in this guide-ring. At the top of the guide-ring the under surface a of the top A is finished, forming a seat for the upper surface d of the valve D. A V61'1ll66 extends from this surface. This vent is controlled by a needle-valve C. I prefer to provide the valve with a flange d, which will steady it in the liquid seal.

Extending from the chamber opposite the tube (1 is a connection E. This is connected with a'T F, and extending from the T is a pipe G, with a gland g. Extending through this gland and through the T F, connection E, and tube a is a tube H. This tube is closed at the bottom by a cap h: It has slotted open- T for any desired distribution. The invention is illustrated in the accom-.

ings h, which connect the tube with the T F, and a flange k which prevents its withdrawal from the tube (6 up into the chamber A, so as to move the valve D to its upper seat. After the valve is seated by the gas-pressure the tube H may be withdrawn from the position shown in Fig. 1.

The operation of the device is as follows: With the needle-valve C in an open position the valve D is pushed so as to bring the surfaces ol and a into contact. It is held to this contact by the gas-pressure. After itis fully seated the needle-valve C may be closed. The tube H, by which the valve D is pushed to its seat, is drawn down to the position shown in Fig. 1. Gas passing through the chamber passes through the tube H and through the On a fall of This tube H maybe pushed gas-pressure the valve D drops through gravity, the lower end of the. valve passing into the liquid B, thus forming a complete seal as against the passage of gas through the chamber A. l/Vhen gas is again turned on into the main, the valve D remains closed, and the valve 0 being closed no escape of gas is permitted. The device may be again opened for the passage of gas by pushing the tube H inwardly against the valve D, the operation being as just hereinbefore described.

What I claim as new is V I. In a safety cut-off for gas-lines the combination of a valve-chamber having a gas-passage therethrough; a valve in said chamber arranged to be held in an open position by gas under pressure and to close the gas-passage upon a failure of pressure, and then to remainclosed with a renewal of gas-pressure; and means for opening said valve.

2. In a safety out-ofl for gas-lines the combination of a valve-chamber having a gas-passage therethrough; a valve in said chamber arranged to be held in an open position by gas under pressure and to close the gas-passage upon a failure of pressure, and then to remain closed with a renewal of gas-pressure;

a liquid seal for'said valve; and means for opening said valve.

3. In a safety cut-off for gas-lines the combination of a valve-chamber having a gas-passage therethrough and a vent therefrom, the

for opening said valve.

4:. In a safety cut-ofl for gas-lines the combination of a valve-chamber having a gas-passage therethrough and a vent therefrom, the valve arranged to be seated by the gas-pressure and to close said vent, said valve being arranged to close the gas-passage upon a failure of gas-pressure, and then to'remain closed with a renewal of gas-pressure; means for opening said valve; and a manually-operated valve for controlling said vent after the main valve has been seated to close said vent.

5. In a safety cut-ofl. for gas-lines the combination of a valvechainber having an outlettube extending into the chamber; a valve in the form of a cap extending from said outlettube; a liquid seal arranged around said tube in a position to be engaged by said valve; a seat for said valve in its open or upper position, said seat being of such surface that the valve is held in an open position by gas-pressure; and means for moving said valve to said seat. I

6. In a safety'cu't-ofl' for gas-lines the com bination of a valve-chamber having a recepta cle' A for the liquid seal; aguide-ring a; an outlet-tube a extending up into the chamber;

a Ven'talextending from the upper part of the chamber Within the ring a the valve D normally arranged within the ring a and to be held in its upper position by gas-pressure, the

valve'D being cap-shaped and adapted to close with the liquid seal over theoutlet-tube, and said liquid seal.

7. In a safety cut-ofl for gas-lines the combination of a valve-chamber having the flange a; the outlet-tube (0 extending up into the chamber with a second flange a opposite the flange a said flanges and walls of the chamber fOrming a liquid-receptacle A; a liquid seal in said receptacle; and a cap-shaped valve arranged to extend from the'outlet into the liquid seal.

8. In a safety cut-off for gas-lines the combination of a valve-chamber having the flange (f; the outlet-tube (0 extending up into the chamber with a second flange a opposite the flange a, said flanges and walls of the chamber forming a liquid-receptacle A; a liquid seal in said receptacle; and acap-shaped valve arranged to extend 4 from the outlet into the liquid seal, said valve being arranged to be held in an open position by gas-pressure; and means for opening the valve.

9. In a safety cut-01f for gas-lines the combination of the valve-chamber; a valve D arranged in said chamber adapted to be held in an open position by the gas-pressure and to close the gas-passage upon failure of gas pressure, the tube H forming part of the passage for the gas, said tube having slits h for the passage of gas to 'or'from the tube, said tube H being arranged to slide into the chamber A for opening the valveD.

10." In a safety cut-off for gas-lines the combination of the chamber A having the outlettube a extending up into thechamber, the flanges a and a inclosing the receptacle A, a guide-ring a extending from the top A of the chamber, the top A of the chamber having the vent a and surface a on its under side; the vent-valve C controlling the vent a the main valve D arranged in the guide-ring a having a surface 61 to act on the surface a, the valve having the flange cl; a liquid B in the receptacle A; the tube H in the outlettube a said tube H having the slot h for the purpose described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CONRAD BACHMANN. Witnesses:

(J. D. HIGBY,

FRED. A; BAHRISCH.

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