US1173966A - Automatic gas shut-off. - Google Patents

Description

E. J. HINKSON.

AUTOMATIC GAS SHUT-OFF.

AEPLICATION FILED JULY22. 1914'.

1,173,966. Patented Feb. 29,1916.

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I ELMEB JNO. HINKSON, OF ERIE, PENNSYLVANIA.

.AUTOMATIC GAS SHUT-OFF.

To all whom it may concern:

Be it known that I, ELMER J. HINKSON, a citizen of the United 'States, residing at Erie, in the county otE-rie and State of have invented new and useful Improvements-in Automatic Gas Shut-Otis,

of which the following is a specification.

This 1nvent1on is an lmproved automatlc gas shutoff for use in a gas service pipe to close the same in the event that gas pressure should be materially reduced in the pipe and thereby avoid the danger resulting from material variations of gas pressure, ject of the invention being to provide an 1mproved device of this character including in combinationwith a gas duct or service pipe a normally open cutofi' valve therefor, a valve servmg'as a clrcuit closure normally.

open and held so by gas pressure and adapted. to close upon adlscontmuance of such pressure, normally lnactlve electrically operated means to close the cutoff valve, a nor- A mally open electric circuit in which said electrically operated means is includedand circuit closing means operated by' the valve serving as a circuitclosure when-the latter closes, as hereinafter described'and claimed.

In the accompanying drawings :Figure 1 is an elevation of an automatic gas-cut ofi' apparatus constructed in accordance with my invention, the casing for the same being indicated in section. Fig. 2 is a vertical cen-' tral sectional view of the same. Figs. 3 and 4 are detail views.

For the purposes of this specification a gas service pipe is indicated at 1.

In accordance with my invention I provide an aluminum cutofi valve 2 which is ar- I i ranged in said pipe and which is normally is mounted in bearings 6 and is provided at.

open, but which may be moved so as to cut ofi' fiow of gasthrou gh the pipe. I also provide a valve 3 provided with circuit closing means, said valve being arranged in the service pipe and co-acting'with a seat4. This valve is held open by the pressure'ofgas in the direction indicated by the arrow in Fig. land is-providedwith a pivot rod 5 which one end with an arm 7'which carries an electric contact point 8. The valve 3 although normally held open by gas pressure is adapted, upon discontinuance of gas pressure or a dangerous diminution thereof to close by its own gravity against the seat 4 and therebyraise the arm 7.

A. frame 9 of suitable construction is atthe ob- 19 operates.

Specification of Letters Patent. P t t Feb 29,191 Application filed. my 22, 1914. Serial No. 852,517.

tached to the service pipe and is here shown as arranged in a suitable casing 10. This casing has a door 11. The core 12 of a sole- IlOlCl is arranged vertically and depends from the upper side of the frame at a suit- 7 able distance from the pipe11' and is prov1ded with an arm 13 which-has an electric contactpoint 14 adapted toscoact with the manually raised and the coil is further provided, at its lower .end, with a stud 19. The cutoff valve is here shown as a plug valveand is provided with an arm 20 at one side which is provided with. a contact point or device 21. A rod 22 is vertically arranged, has its lower end pivota-lly connected as at 23 to the valve arm 20 andis provided near its upper end with aslot 24 in which the stud Aconducting bar25 is arrangedon a support '26 and has a binding post 27. The

frame 9 has an opening 28' throughwhich .extends a dog 29 the same being pivotally mounted as at30and its inner end being adapted to engage under the shoulder 17 so as to support the coil of the solenoid nor- 'mally in elevated position. At the outer end of the dog is a counterbalancing weight 31.

Its inner end, which normallv supports the coil of the solenoid. normally rests on a contact point 32 which is connected by a conductor 33 to onepole 34 of an electric battery 35. The other pole 36 of the batterv is connected bv a conductor 37 to the binding post 27 and said binding post is also connected by a conductor 38 to the contact pointor member 8. One end of the winding of the solenoid-coil is connected by a conductorv 39 to the contact point 14. The other end of the winding is connected by a conductor 40 to the conducting bar or strip 16. An electric audible alarm is con.-

nected by a conductor 42 to the contact point 21 and by a conductor 43 to the pole 34 of the battery. Normally the electric circuit is broken between points 814 and points 21-25, the valve 2 being held open bvthe coil 15 which latter is held in elevated position by the dog and the controlling valve 3 is held in open position.

This causes the contact point 8 t0, come in electric contact With the point 14 and thereupon an electric current Will pass iromlthe pole 36 of the battery throughi the conductors 37-and 38, points 8+14E, conductors 39, the Winding of the coil 15, theconductor 4E0; conducting f bar on strip 16 and" through the dog, point 32 and conductor 33 to; cause the shoulder, 17' to, clear thefpoint ofthe dog, thereupon the Weight 31 of the dog raises its. point-and'releases thesame from the shoulder 17,1thereby breaking the electric circuit between the conductor 16 and'the contact point 32 and permitting the coil todrop. V The Weight of the coil is thus imposed upon the arm 20 throughthe rod 22 and said arm is caused. to close the cutoff valve, thus positively preventing flow of gas through the pipe 1. (The-contact point 21 of the arm 20 is brought into contact with the conducting bar 25 thus establishing an electriccurrent from the pole 36' of the battery,

through conductors 37 and 25 and 42, the signal lI and back to the pole 34: of the battery and through the conductor 43 thus causing the signal to sound an alarm. ,The

flow of gas. through the pipe cannot be re- 7 established until'after the device has-been made in "the form, proportion and construction of the several parts Without departing from the spirit of theinvention and Within the scope: of-the appended claim.

1 Having thus described lmy invention; claim 5 back toqthe pole=34= of the battery. Hence thecoil becomes energized and moves up v'vardly'on'the; core-12 1a suflicient distance:

In combi ation Witha d illcut 70H.

have it understood tha'tchanges may be to be normally in contact With the solenoid;

a circuit closing means connected ith said duct and operable upon. the diminution of the pressure of the gas therein to close said circuit, thereby venergizing the solenoid to release the same from said dog, an arm connected With said cut off valve, and a link terminally connected With said arm and solenoid, Wherebyvvhen saidsolenoid is released' from the dog the cut off; valve is drawn to a closed'position.

In testimony whereof Ialfix my signature in presence of" tWo. Witnesses.

ELMER ,JNo- INKso i Witnesses: p 1 1 DANIEL O. HOPKINS, WM. J HINKSON.

I Copies of this trade-mark be obtained five'eents each, by addressingthe Commissioner of Patents,

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