US901197A - Thermal gas-cut-off device. - Google Patents

Thermal gas-cut-off device. Download PDF

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Publication number
US901197A
US901197A US1908426632A US901197A US 901197 A US901197 A US 901197A US 1908426632 A US1908426632 A US 1908426632A US 901197 A US901197 A US 901197A
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United States
Prior art keywords
valve
gas
casing
cut
stem
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Expired - Lifetime
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Inventor
August C Schwager
Original Assignee
Julius Hollander
August C Schwager
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Priority to US1908426632 priority Critical patent/US901197A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/38Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
    • F16K17/383Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/1624Destructible or deformable element controlled
    • Y10T137/1797Heat destructible or fusible
    • Y10T137/1819Safety cut-off

Description

A. C. SCHWAGER.
THERMAL GAS CUT-OFF DEVICE.`
' APrLIoATIon FILED un. 1a. 190s.
Patented Oct. 13, 1908.
kWhnesses;
To all 'whom 'it may concern:
Be it known that I, AUGUST C. SoHwAeEn, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented cer-l tain new and useful Improvements in Ther# mal Gas-Cut-Of Devices, of which the following is a specification.
This invention relates to a thermal gas cut-oli device' for shutting olf the supply of s to house meters and piping in case of ile, when the temperature in the vicinity of the cut-olf device rises to a point where it will melt a fusible element melting int, and it is especially adapted to cut olf tliii) supply of gas from city mains to a house meter when the temperature in thev vicinity of the meter rises high enough to melt any portion of the meter casing.
In the accompanying drawings I -have illustrated one embodiment of the invention, in which Figure 1 -is a `central sectional view through the valve-casing of the device, illus- 25 trating the valve in its open position, in
which lit is held by the fusibleelement. 2 is a similar view showing the valve forced to its seat byl thel release of a valveactuator, which is normally heldunder restraint. Fig. 3 is a transverse section of the valve and valve-casing, the section being taken in the line 3-13, Fig. 1. Similar characters designate like parts in all the figures of the drawin The thermal gas cut-oil' em vention contains preferabl a tapered plug valve, such as 2, working 1n a valve-casing, such as 3, having a tapered seat. The valvecasing 3 has the usual threaded inlet and outlet openings, such as 4 and 5,' the 1former of which will generally` be indirect communication with a street main leading from the source of supply, connection being made to the mainl throu h suitable piping, while the outlet 5 wil A be in communication through similar pip` g with the ordinary meter. .It will be noticed that the inlet and outlet openings are connected by a passage 4which intersects the tapered seat of the casing, dividing the valve-seat into twoportions, one of which is indicatedc by Gland the other by 6*. At the'lower end of the valve-casing a plug, such n li', may be placed for the pur of permitting `access to the ying my i'nspecification or Letter-i recent. Application mea Api-i1 1s, 190e.- "su-m No. nasse.
having a low,
-ho ding the valve normally abl will'be connected with f UNITED STATES. PATENT OFFICE.
AUGUST C. SCHWAGER, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALFJTO JU LIUS HOLLANDER,
, OF BOSTON, MASSACHUSETTS.
THERMAL GAS-CUT-On DEVICE.
Patented oet. 13,' iooe:
movin accumulations of'h drocarbons, etc. This p u 7 is screw-three ed into the bottom of t ev casing as'shown, so as tofit, tightly therein and prevent 'escape ,of gas. T e/upper end of the tapered opening in the casing may be closed gas-tight in any suitable wa as for example, by means of a thread cap, such as 8, which in this case forms a art of a `cylinder 9 in which the stem of tli)e valve 2 works. The stem of this valve is indicated at 10. The upper part of C the valve-casing is externally threaded to engage, corresponding internal threads inthe cap 8, whichucap and the up r end of the casing are preferably forme with ground seats, such asfll, for the purpose of making .the connection gas-tight without using packing.. l v. j At theupperend thereof the 'cylinder 9..is
' a manner similar to that justfde'- closed 1n l scribed by a threaded cap 12 which also has internal threads en aging external threads at the upper end o? said cylinder. A gasa'. f tight t of the cap on the upper end of the cylinder may be made in a manner substantially similar to that just. described inA confnect'lon with the cap 8. The ground an'nular seats of the cap 12 and the coactingend of the cylinder 9 are indicated at 13. g The valve-stem shown is of two diameters, the upper portion thereof being reduced and being encircled in thisinstance by a strong coiled slpring 14 constituting a power device normal y tending to close the valve, but which is normally held in restraint in a manner which will be hereafter described. This sprin 14 rests at its lower end against the shouler 15 ofthe valvestem. and at its upper end bears `a ainsta packing-ring, such= as 16, provided or the purposeofpreventing escape of gas through the in which the valve-stem works. This pac 'ngx is held rmly in place, by the s ring "1 4, v
Normallythe valve 2 is held) open-Shy a Y device which embodies a fusible element havin a lowmelting point. The means for open may be of but the fusible element generally be a connectorof soft solder properly com ined with the valve toy hold the same securely in the open position; Preferthe means for holding the'valve open manual valve-operatmg'means secured to the stem of the .valve,
sulta ble type,
B6 interior of e casing for'the purpose of rethe constructiony shown one in which 11o Joining theptwo main parts. The fusible'4 element is lndicated at 20 as a piece of solder of the proper size and strength connecting the threaded portions of the bar 19, the ends y of which have stop-nuts, 21 and 22, for holding the handles 17 and 18 inthe desired position. The lower ends o f these handles are formed in this case with curved Ycam surfaces which permitthe valve-stem and thereby the valve to be raised readily. The normal positions of the arts are shownv in Fig. 1. The `positions oV the parts in case of a ir'e when the fusible' element V20 has been melted are indicated in Fig. 2. It will be noticed that the tapered plug gas valve 2 has been forced downward by the spring 14, and that the` tapered surface of the valve is in close' contact with the coacting tapered surfaces 6 and 6 of its seat, cutting ofcommunication between the main and the meter. y
The tapered surfaces of the valve and its seat in the casing are both ground in order that there may be noileakage of as past the valve after 'the latter has been el at 23, for the double purpose of providing a space into which accumulations of hydrocarbons in the casin may be forced and to enable .the loweren of the valve to be tapered to a sharp edge, such as 24, which will assure its cutting through any such accumulations and finding a positive seat when the spring is released.
It will be obvious that thev normal positions ofthe parts shown in Fig. 1 will remain unchanged until the connector 20 is melted, when the force normally holding the valve open being removed the sprin will come into action and effect a positive c osing of the valve to'the osition shown in-Fi 2.
By means of my inventiony the added danger of gas escaplng in houses, stores, etc., when a lire occurs, is obviated, as the thermal cut-olf device will automatically cut olf the supply to the meter and prevent escape of gas into the house or other building even if the piping is melted or broken Y.on the house side of ther meter. l
VVh'a-t I claim is:
1. Athermal gas cut-off device, embody-l ing a valve-casing'connected with a source f of supply of illumlnating gas and having a ground tapered seat, a' long ground tapered plug gas valve in said cas1ng,/`a valve-steni 'nojecting from said valve, guiding means in which saidstem is positively ,guided and freely movable throughout the movementI of removable 'for permitting cleaning of the valve-casing,
o sed. They valve itself is preferably bored out, as shown.
the valve from its open to its closed position, a -power device normally tcndin to close said valve, and means for normal y holding said valve open, said means embodying a fusible element clear ofsaid valve-stem and having substantially all' of its surfaces directly exposed and also havinga low melting oint. P2. Athermal. gas cut-nii device,;embody'I ving' a valve-casing connected with a source of sup ly of illuminating gas and having a ground) tapered seat and also having a clean` ing opening at the bottom of the casing, a plug tightly fitting said opening a ground tapered plug gas valve in said casing having at its small-end an opening forming a knife-edge around said end of the valve, apower device normall tending to close saidV valve by movement 1n the direction of the Ivalve-axis, and means for normally holding said vvalve open, said means embodying a fusibleelement having a low melting point.
l3. A thermal gas cut-oft'V device, embodying a valve-casing connected with a source of supply of illuminating gas and having a ground tapered-seat, a long ground tapered plug gas valve and a valve-stem formed in one piece and one forming a continuation of the other, means for guiding said valvestem at opposite ends thereof, a spring surrounding said stem and normally tending to close said valve Vand hold it to lts seat, and means for normally holding said valve open, said means embodying 'a fusible element clear of said valve-stem and having substantially all of its surfaces directly exposed and alsohaving a low melting polnt. 4. A thermal gas cut-off device, embodying a valve-casing connected with a source ythe other, means for guiding said valve-stem at opposite ends thereof, a spring surrounding said stem and normally tendlng to close sa1d valve and hold it to its seat, means in'- cludin a pair of pivotedhandles connected to sai valve stem for Y moving the valve away from its seat in opposition to the power of the spring, and connecting means-joining said handles for normall holding saidvalve open, said means embo ying a fusible' element having a' low m'elting point.
Signed at New York, inf the county of New York, and State of New York, this 11th day of April, A. D. 1908.
' .AUGUST C. SCHWAGER. W'itnesses: EDGAR A. FELLows, yC. S. CHAMPION.
US1908426632 1908-04-13 1908-04-13 Thermal gas-cut-off device. Expired - Lifetime US901197A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635670A (en) * 1985-12-06 1987-01-13 Cameron Iron Works, Inc. Heat sensitive valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635670A (en) * 1985-12-06 1987-01-13 Cameron Iron Works, Inc. Heat sensitive valve
EP0225435B1 (en) * 1985-12-06 1990-12-27 Cameron Iron Works, Inc. Heat sensitive valve

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