US2850030A

US2850030A - Safety valve devices

Info

Publication number: US2850030A
Application number: US344396A
Authority: US
Inventors: Ledra C Guelson
Original assignee: Baso Inc
Current assignee: Baso Inc
Priority date: 1953-03-24
Filing date: 1953-03-24
Publication date: 1958-09-02
Anticipated expiration: 1975-09-02

Description

Sept. 2', 1958 s. GUELsoN SAFETY VALVE DEvIcEs v s sheets-sheet 1 Filed March 24, 1955 I 6 mms/gok. im whom. e0 ladra 6. eom Execafaz B im LM ama ,dim-u A 'r r o a n v5 Fica. 2.Y

Sept. 2,` 1958 s. GUELsoN 2,850,030

SAFETY VALVE DEVICES Filed March 24, 1955 3 Sheets-Shea?I 2 Fna. 7

i?! lama/01h40 SePt- 2, 1953 s. GuELsoN 2,850,030

SAFETY VALVE DEVICES A-r-roaNaY United States Patent" SAFETY VALVE/DEVICES l Stanley Guelson, deceased, late of Milwaukee, Wis., by

Iedra C. Guelson, executrix, Whitefish Bay, Wis., asslgnorfto-Baso.Inc., Milwaukee, Wis., a corporation of.' Wisconsin Application March V24, 1953, SerialfNm 344,396

9 Claims.l (c1. mta) This invention relatesk to safety valve devices such for example as those shown in the patents'to 'I-Iildebrecht, 2,114,446, of April 19,1938, for Thermoelectric VSafety Deviceand the Like, Mantz,'2,27l,506,V of January 27,

v1942, for Thermoeleetric'Safety Device, and Wantz,

2,307,870, of January 12, 1943, for Control Device, all of which are assigned rto'the sameassignee as the present invention;

Inthe. prior development of the art relating to thermoelectrically. controlled safety valve devices,. ithasbeen the'regular practice to provide for the insertion of .two assemblies, one from the upper and one from the lower side of the main body of the valve device, these two assembli/es controlling,v respectively, the main valveand the temporaryrflow interrupter valve which latter interrupts the flow to the main burner during the initial portion of the cycle until after flow has been established to a pilot burner which in turn heats athermocouple andenergizes the holding electromagnet for the main valve. These prior devices also operated by movingtheelectromagnet down intocontact with the armature on the one hand, or .moving the armature up into contact with the electromagnet on the iother hand. It was also the practice in some of the .prior devices to provide means .for supplying. the pilot burner from the space between the Vmain valve and the temporary ow interrupter rvalve.

Thisinvention is designed to avoid .the-necessity of having access to the bod-y portion from'boththe toptand the bottom portion thereof. One of-theprimary objects. of the invention is to provide safetyV valve devices in which the entire assembly carryingthe main valve\,'the pilot.

valve, or pilot valves, and thetemporary ow interrupter valve as aunitary assembly is insertableintothc main'body portionfrom one sideonly, for rexample,.the top,.so that there isno necessity for machining orotherwise working the other side of the main bodyportion, and so that there is no necessity for providing an auxiliary resetbutton and associated flow interrupterivalve `but instead i in which all oi-.the` .parts-arefinsertable r and manipulable from one side only of the body portion of the device.

A further objectV of this invention is tofprovide safety valve devices which are' so constructed that-theinsert-able assembly is removable as a unitary-'structure.andemay be bodily lifted from the 'mainfbodyof thefvalvefor inspection, adjustment, or repair and inwhich no adjustment is required within the Vmainbody portionof the valve structure itself.

A further object of this inventionis toprovide a temporary flow interrupter valve which is normally seated--when the device is not actuated and whichdoes` not have -to-be manually held against its seat 'while the-pilotbnrner is being lighted but which is permanently biasedtowards its seat. l

A further 1Vobject of thisl inventionistoprovide a con'` struction whereby a sequentialfopera'tion: of the pilot.

burner valve or valves, the mainzvalveg.- and thetemporary ilow interrupter Valve are securedduring the-opening cycle, and in which all valves are'closed when energization of the device fails as for example -upon extinguishing of the pilot burner and cooling of the thermocouple i or `breaking or shorting of vthe electric circuit to the electromagnet.y

A further specific object is to so'construct a'safety valve device of the above dened type in whichy thetemporary tlow arrester valve is of smaller'diarneter than the opening through the main valve seat so that during 'i insertion of the main valve assembly into the body portion of the valve, the temporary ow larrester valve may passthrough the main'valve seat into'operative position with reference to its own valve seat.

Embodiments of the invention are shown in the accompanying drawings in which:

Figurel is a longitudinal sectional view through the valve device with all of the valves in closed position, such view showing one form of the invention.

Figure 2 is a fragmentary line sectionon the line 2-2 j of Figure 1.

Figure 3 is a fragmentary line section on the line 3-3 of Figure l'.

Figure 4 is a longitudinal sectional View through a valve device showing a further form .ofthe invention,

such view-l corresponding to Figure 1 'and showing'the' valves in closed position.

Figure 5 is a line section on the line 5;-5 of Figure 4.

Figure 6 is a fragmentary line section on the line 6--6 of Figure 4.

Figure 7 is a fragmentary sectional view on 'the line 7-7k of Figure 4.

Figure 8 is a longitudinal sectional view through a;

valve device showinga still further form that the invention may take, such view corresponding to Figurel and showing the Valves in closed position...

The :expressions top portion or bottom portion ofthe valve body are used merely for the sake of sirnplicity and are in no sense to be interpreted as limiting L as the valve device may be mounted in any position de-L sired.

It is believed that a clearer understanding of the dii'erent forms of the invention .may `be had if it is remembered i that the sequential operation of the valve devices during" opening is. as follows:

First, the pilot burner valve opens.= Second, the main` valve partly opens. Third, the main valve fully opens. andi In this way couple -to the electromagnet, all .valves-.are closedandthere .is cutoil. With this brief.. outline of the. operation of the valve.devices,the detailed descriptiony of the several forms thatmthefinvention may take, will Vbe given.

Referring to Figures 11, 2 and 3 showing .theirstform l of the invention, it will be= seen thatthe valveidevice, comprises a body portion or main portion 1 which has an., inlet 2 and an outlet 3. Between the inlet and` outlet there is a chamber4 'which constitutes a pilot burner supply chamber and also constitutes the main flowpassage when both the main valve andthe temporary flow inter-` rupter valve are open. The yupper portion ofthe chamber terminates in a mainvalve seat S and the .lowerportionhas the temporary ow interrupter` valve seat 6.. The main valvev'is indicated generallyby :the reference character 7 andthe ow interrupterffvalve bythe reference charac-` ters.

The main valve is rigidly attached to an armature 9 positioned immediately below an electromagnet 10 adapted to be energized from a thermocouple, not shown, through the usual electric circuit indicated generally by the reference character 11.

The armature 9 has a stem which projects slidably through the bottom portion of a magnet housing 12 which is rigidly attached to a manually manipulable button or member 13. It is to be understood that the magnet housing 12 may be directly electrically connected with the body portion or grounded by a conductor, not shown, or dependence may be placed upon the sliding engagement of the metal parts.

It is to be noted that the temporary flow interrupter valve 8 is of smaller diameter than the opening through the main valve seat S so that it may be passed directly through the main valve seat during assembly of the parts of the valve device as will appear hereinafter.

The magnet housing 12 is rigidly connected to the externally located manually manipulable button or member 13 by means of a shank 14 and is upwardly urged by means of a relatively heavy spring 15. Preferably a packing 16 is provided around the stem 14 as shown and also a small leather or sealing disk or valve 17 is carried on the upper portion of the housing 12, so that when the parts are in the position shown in Figure l the case is completely sealed off from passage around the stem 14.

It is to be noted that the housing 12 for the electromagnet is provided with a stirruplike member or transverse portion 18 which is positioned within a similar inverted stirruplike member 19 which latter is rigidly attached to the main valve 7. These portions are not in contact with each other. The portion 18 is positioned directly above the stem 20 of the pilot valve 21. The pilot valve 21 normally closes an aperture directly through the main valve 7 as is obvious from an inspection of Figure 1. It is urged upwardly by means of a spring 22 so that the pilot valve is normally closed. A second spring 23 is positioned between the main valve and the electromagnet housing 12.

It is to be noted particularly that the main valve is provided with a depending casing 24 which is apertured as indicated at 25 and which communicates therefore with the space 4.

It is to be noted also that a pilot burner pipe 26 opens into the space 4 and it is intended that this pipe be connected to a pilot burner, not shown.

It is to be noted particularly that the temporary flow interrupter valve 8 is loosely connected by means of the thimble 27 with the depending casing 24 of the main valve l 7. It is to be noted particularly that there is a limited movement permitted the main valve 7 during its opening stroke before the temporary ow interrupter valve is opened.

Any suitable means may be provided for holding the electromagnet housing 12 against rotation, for example, a keyway 28 may be formed in the main valve body 1 as shown particularly in Figures l and 2 and the relatively rigid insulating sheath or tube 29 of the conductor 30 for the electromagnet may be passed through such sheath. In this way the magnet housing 12 is prevented from rotation with respect to the valve body. It is to be noted further that the upper portion of the valve body is provided with an opening which is closed by means of a cap 31 which latter guides and houses the stem 14 of the button 13.

The operation of the safety valve device is as follows:

burner not shown may then be lighted in any suitable manner and when its thermocouple, not shown, is energized the electromagnet will hold the armature 9 securely against its pole tips. The operator then allows the button 13 or manually manipulable member to rise under the influence of the spring 15 and thus bodily lifts the armature 9, the main valve 7, and the auxiliary valve 8. At this point it is to be noted particularly that during this upward motion the main valve 7 is partially opened before the temporary tlow interrupter valve 8 opens and this maintains pressure in the pilot pipe 26 prior to the tlow to the main burner, although the main valve 7 is now executing its opening motion. Thereafter the auxiliary or temporary tlow interrupter valve opens upon continued upward motion of the main valve 7 and the How of gas to the main burner, not shown, is complete. It is to be understood that suitable gaskets, washers or other packing may be employed wherever necessary in accordance with the usual practice.

If the pilot light fails thus allowing the thermocouple to cool or if the electric circuit to the electromagnet is broken or shorted, the armature 9 immediately drops and the main valve, auxiliary valve, and pilot valve close.

It is apparent from the -above that there is 100% cutoff upon failure of energization of the electromagnet.

In the form of the invention shown in Figures 4, 5, 6 and 7, it will be seen that the same general idea has been followed as that previously described. However, this form is an improvement over that shown in Figure l, in view of the fact that the electromagnet does not have to hold against the force of two springs 'but instead as will be apparent as the description proceeds it has to hold against the force of merely one spring, viz., that for the main valve and not the spring for the pilot valve.

Referring in detail to Figures 4, 5, 6 and 7, it will be seen that the safety valve device comprises a body portion 32 which has an inlet portion 33 and an outlet portion 34. It has the electromagnet 35 corresponding in all parts to the electromagnet previously described and has the armature 36 therefore. The coaction of the electromagnet and armature are identically as previously described. The magnet housing is indicated at 37. This electromagnet housing 37, however, is not rigidly attached to the manually manipulable externally located button or member 38 but instead is spring pressed upwardly by means of the spring 39 and rests against stops 40 carried by the upper removable head portion 41, the head portion 41 being removably secured to the body portion 32 as shown in Figure 4. The lower portion of the spring 39 bears against a saddle member or transverse member 42 which is formed integrally with a pair of arms 43. These arms 43 extend upwardly in keyways or guide ways 44, see Figure 5, and are attached rigidly to the manually manipulable button or externally located member 38 by means of a stem 45. A spring 46, which is more powerful than the spring 39, urges the button 38 upwardly.

It is to be noted that the usual sealing valve 47 surrounds the shank and the usual packing is provided for such shank as previously described.

The inlet and

outlet portions

33 and 34 are joined by means of the pilot burner supply chamber 48 in the same way as that previously described. This chamber is provided with a temporary flow interrupter valve seat 49 and with a main valve seat 50. The main valve is indicated at 51 and the flow interrupter valve at 52. The pilot valve is indicated at 53 and is spring pressed upwardly by means of the spring 54. The main valve 51 carries a downwardly depending housing 55 which is apertured as indicated at 56 and is thus in communication with the chamber 48, the chamber 48 being connected to the pilot supply pipe 57.

It is to be noted that there is a relatively loose connection between the ow interrupter valve 52 and the valve 51 so that the main valve 51 may have a limited opening motion before the ow interrupter valve 52 is opened.

assenso It is to be noted that the main valve 51 is provided A with an inverted saddlelike structure 58 against which aY and not against that of the pilot valve spring 54. This will lbecome clearer when the description of the operation is given. The stem 60 `of the pilot valve 53 may be triangular or otherwise shaped so that there is clearance as indicated at 61 in Figure 7 through the main valve 51 to thus allow the free passage of gas when the pilot valve 53 is depressed.

The operation of the apparatus is as follows:

Assuming the parts are in the position shown in Figure 4, the operator presses the button 38 downwardly. The saddle portion 42 engages the stem 60 of the pilot valve 53 and opens `such pilot valve. Continued downward motion of the button 38 moves the electromagnet 35 into contact with the armature 36. The pilotlight, not shown, may now be lighted and when the electromagnet is'energized the operator may allow the button 38 to rise thus opening the main valve and the temporary flow interrupter valve. As previously described the main valve `opens a slight amount before the ilow interrupter Valve opens and thus pressure to the pilot light is maintained although the temporary flow interrupter valve is subsequently opened.

Particular emphasis is placed on the Vfact that the electromagnet 35 does not have to hold against the pressure of the spring 39. The pressure of the spring 39 is borne by the yoke or stirrup 42 and this yoke communicates mechanically with the stem 4S so that the spring 46 holds the spring 39 compressed. The other end of the spring 39 bears against the underside of the housing 37 of the electromagnet which in turn rests against the stops 40.`

The problem was to maintain the pilot valve open until after the main valve opens, but thereafter to relieve the magnet `of the force of the spring 54.' This is accomplished by virtue Vof the fact that as the valve assembly is moved upwardly under the influence of the spring 46,`

the spring 39 insures movement of the housing 37 'with the saddle 42 merely holding the pilot valve open during this opening stroke 4of the main Valve. 37 rests against the stops 48, the saddle 42 is permitted to overtravel to allow reclosure of the pilot valve. Then only the spring force opposing that of the magnet is that of the spring 59 which moves the main valve to closed position upon the deenergization :of the magnet. This spring 59 has to be calibrated to afford suflicient sealing force to cut oif the flow of gas, but must not be so strong as to overwhelm the holding force :of the magnet. This is a delicate calibration which would be immeasurably complicated if the force of a second spring also had to In production it is much easler to be taken into account. match one spring Vto the magnet holding force than to match two springs, especially in view of the tolerances necessary under production techniques.

In the form of the invention shown in Figure 8, the main body portion of the valve device .is indicated by the reference chracter 62 and is provided with the inlet. portion 63 and the outlet portion.64. Between Athese portions;

is located the pilot burner supply chamber 65 whichis provided with the ow interruptor valve seat 66 and the main valve seat 67 which cooperates with the ow intere' rupter valve 68 and the main valve valve 69, respectively.

It is to be noted also that there is a loose lit between the flow interruptor valve 68 and the mainvalve 69so that the main valve may partly open before the ow interrupter valve opens.

This form of the invention is provided with a directly manually operable by-pass valve 'indicated generallyfbyl the reference character 70 which is carried directly` by the manually manipulable stem 7l provided with the outer button 72.

The electromagnet is indicated by the reference char- When the casing A,

aeter 73 and `the .armature the .reference character .7.4.A

and.the.electromagnet housinggrby therreference charac@- between thetemporary flow interrupter valve 68 -and `the main-valve-69 las shown inFigureS. The .body portion '62 has its upper. opening closedby means of thehead 78 z whichis secured theretoin any suitable manner, as indi.-

A` duct 79 extends .downwardlyl throughthe head.78 andthe `body portion 62and opens into the pilot. burner supply/.chamber 65.. This duct.z79

cated in .Figure 8.

communicates with'a transverse duct 80the outer portion of which is closed' by means. of a plug.81. Theduct 80..

communicates with a space.82 immediately .surrounding y. the stem.71. However, gas .-isprevented from reaching the duct 80by means of .the valve'70 which. is .rigid.with,

the stem .'71 and cooperates withthe seat 85. A suitable.

packing Y83 surrounds the .stem 82and is'held in placeby,

the spring 84 which urges .the.button.72 upwardly. The.v pilot burner .supply Vpipeis indicated .by `the reference.. character 86 and communicateswithnthenpilot .burnerf supply chamber 65.

The operation` of this apparatus is. .as fol1ows:.

ber 65 to the auxiliary outlet through which thepilot burnensupply pipe86 opens. The pilot. burner may now be ligl 1ted..` The downward motion of thev button 72 brings y. the..poles:of Athe .e1ectromagnet.73.into contact with the ar-mature..74 and when theelectromagnet is energized the.

operatorrnay allow. vthebutton 72.to risethus lifting the.; mainvalve .69.and1heauxiliary ortemporary flow in. terruptei-valve 68 from their seats It is to be noted that themainvalve opens slightly before the temporary ow iriterruptenvalve opens and thus the `pressure inthe pilotl.

line .fismaintain'edtn Thev by-pass valve.70, which may be called the ,manual valve or stem valve hereinafter, finally,

closes.. upontcompletion vof the upward stroke of the button 72 but nevertheless pressure is maintained -in the pilot burner Vsupply/@chamber y65duetothe opening of the main valve-before closureof 'the valve 70./

Itis' to be noted that in the form ofl the invention`^ p shown in Figure 8 onlyone spring `opposes theV holding force of the electromagnet.

ltis to be notedy that in. all formsV of theinvention the valves are equipped with suitable. leather. or other type of sealingdisk's'.and{thatsuitable gaskets are employed at usual places Where junction between parts is etected.

It is to be` noted particularly that the directly manuall'yl ,manipulable valve 70 of Figure 8 may be used, vwith either of the rst described' forms ofthe invention shown. in Figures l 'and 4.1 Un'der these conditions the duct 79". of Figure 8"is dispensed with and the plug 81 is replaced by an`\ additional or auxiliary pilot burner .supply pipe,.l notshown. .This auxiliary pilot supply pipe may lead to a charging pilot 'such' as'shown in the patent to Witzel, 2,527,286, of October 24, 1950, for Safety Shutoff Control for Pluraililot Gaseous Fuel Burner Systems, suchpatent being owned 'by the same assignee .as the present' invention; ,Itis to `be noted that while both .the usual pilot line and.charging pilot line are open initially, that. thecharging pilot "line is closed as soon as the shutoffcontrol' is in foperation.

In all.forms of the. invention the opening through the upper `portion ofthe bodyV part 'of the valve device is larger :than'the diameter of the 'main valve and, as previously explained,'the diameter of .the .temporary flow in terruptervalveds `smaller than-the opening throughr the, seat 'of the maint valve? Thus itis possible to insert the.

main valve assemby directly through one side only of the main valve body and it is not necessary to have an additional opening through the other side of the main valve body.

Another advantage arising from the constructions described hereinabove resides in the fact that the main valve assembly can be lifted bodily as a unit from the main valve body. In the forms shown in Figures 4 and 8 all of the electric connections are lifted free of the body portion as they are carried by the head of the device. In the form shown in Figure 1 a suitably flexible and extensible portion of the conductor 30 is provided to allow the ready removal of the valve assembly. The operator, if he desires, may thereafter detach the conductor 30.

It is to be distinctly understood that the terms upper and lower appearing hereinafter or in the preceding description are not to be interpreted as limiting for as stated previously the valve devices may be installed in any position desired. These terms are therefore used merely to lessen the number of limiting phrases that would otherwise have to be used. Further it is to be understood that where the expression manually manipulable external member is employed that such member is not necessarily limited to one which may be manipulated by hand but is intended to define a member which is manipulated from any means whatsoever.

Although this invention has been described in considerable detail, it is to be understood that such description is intended as illustrative rather than limiting, as the invention may be variously embodied and is to be interpreted as claimed.

What is claimed is:

l. A safety valve device comprising a body portion having an inlet and an outlet and having a pilot burner supply chamber between said inlet and outlet, said chamber having spaced first and second valve seats, and said body portion also having an opening through a side thereof and having a pilot burner outlet communicating with said pilot burner supply chamber, and a unitary valve assembly insertable through said opening and including tirst and second valve means, said tirst valve means cooperating with said first valve seat, said second valve means cooperating with said second valve seat and insertable through said irst valve seat, and operating means forming a portion of said assembly for operating said valve means, said unitary valve assembly further including third valve means operatively associated with said inlet and said pilot burner supply chamber and movable, when said first and second valve means are closed, to an open position affording communication between said inlet and said pilot fuel supply chamber for initially establishing communication between said inlet and said pilot fuel outlet before opening of said rst and second valve means.

2. A safety valve device for main and pilot burners, comprising a body portion having an inlet and an outlet for a main burner and having a pilot burner supply means including a chamber between said inlet and outlet, said chamber having an upper and a lower valve seat, said body portion having an opening on its upper side, and a valve assembly insertable through said opening and including a main valve cooperating with said upper valve seat and a temporary ow arrester valve cooperating with said lower valve seat and insertable through said upper valve seat, and operating means forming a portion of said assembly for operating said valves, said valve assembly including a pilot burner valve cooperable with said supply means and mechanism for operating said pilot burner valve from said operating means.

3. A safety valve device for main and pilot burners comprising a body portion having an inlet and an outlet and having a pilot burner supply means including a chamber between said inlet and outlet, said chamber having an upper and a lower valve seat, said body portion having an opening on its upper side, and a valve assembly insertable through said opening and including main valve means cooperating with said upper valve seat and temporary flow arrester valve means cooperating with said lower valve seat and insertable through said upper valve seat, said valve assembly including a pilot burner valve means operable when open to afford communication between said inlet and said chamber, and operating means including mechanism for sequentially actuating said pilot burner valve means and thereafter both said main and temporary tlow interrupter valve means.

4. A safety valve device for main and pilot burners comprising a body portion having an inlet and an outlet and having a pilot burner supply means including a chamber between said inlet and outlet, said chamber having an upper and a lower valve seat, said body portion having an opening on its upper side, and a valve assembly insertable through said opening and including a main valve cooperating with said upper valve seat and a temporary ow arrester valve cooperating with said lower valve seat and insertable through said upper valve seat, said valve assembly including a pilot burner valve means operable when open to afford communication between said inlet and said chamber, and operating means including mechanism for sequentially `opening said pilot burner valve means, partially opening said main valve, and simultaneously fully opening said main valve and said temporary ow interrupter valve.

5. A safety valve device comprising a main body portion having passage means therein, said passage means including a main and an auxiliary valve seat and pilot burner supply chamber means between said seats arranged to be connected to a pilot burner, and a valve assembly including a movable member having an externally operable element for moving said movable member, a main valve and an interconnected temporary iiow arrester valve cooperable with said main and auxiliary seats, respectively, a pilot burner valve normally biased toward a closed position and operatively associated with said externally operable element and movable to an open position affording communication between said chamber means and said passage means upstream of said main valve seat by depression of said externally operable element depressing said movable member, first biasing means between said main valve and said movable member biasing said main and arrester valves toward said main and auxiliary seats, an armature connected to said main valve, second biasing means for returning said movable member to its initial position following depression thereof, and an electromagnet carried by said movable member and arranged to be moved into engagement with said armature against the bias of said first biasing means when said movable member is depressed and arranged to hold said armature attracted thereto against said first biasing means for movement therewith effecting opening of said main and flow arrester valves on return of said movable member to its initial position under the bias of said second biasing means when said externally operable element is released.

6. A safety valve device comprising a main body portion having passage means therein, said passage means including a main and an auxiliary valve seat and a pilot burner supply chamber means between said seats arranged to be connected to a pilot burner, a valve assembly comprising a movable member having an externally operable element for moving said movable member, a main valve and a temporary ow arrester Valve loosely coupled to said movable member by coupling means for sequential movement thereof, said main and flow arrester valves normally seating on said main and auxiliary valve seats, respectively, a pilot burner valve biased towards closed position and movable to open position by means actuated from said externally operable element, said open position of said pilot burner valve affording communication between said chamber means and said passage means upstream of said main valve seat by depression of said externally operable element, an armature connected to said main valve, an electromagnet carried by said movable member and arranged to be moved into engagement with said armature and arranged to hold said armature when energized, rst spring means between said main valve and said movable member biasing said main valve towards said main seat and normally holding said armature away from said magnet, and second spring means biasing said ilow arrester valve towards said auxiliary valve seat.

7. A safety valve device for main and pilot burners comprising a main body portion having passage means therein, said passage means having an inlet and an outlet and having a main and auxiliary valve seat between said inlet and outlet and having a pilot burner chamber between said seats arranged to be connected to a pilot burner, and a valve assembly including a movable member having a stem and an externally operable element operatively connected to said stem, biasing means biasing saidk stem upwardly, a pilot valve between said inlet and pilot burner chamber operatively associated with said stem for establishing communication between said inlet and said pilot burner chamber when said stem is depressed, a main valve and a temporary llow arrester valve arranged to seat, respectively, on said main and auxiliary valve seats, connection means, an armature connected to said main valve and loosely connected by said connection means to said temporary flow arrester valve for sequential operation thereof, and an electromagnet movable by said externally operable element into contact with said armature, said biasing means raising said electromagnet when said externally operable element is released to sequentially open said main and temporary ow arrester valves, and biasing said main and temporary ow arrester valves toward closed position.

8. A safety valve device comprising, a main body portion having passage means therein, said passage means including a main and an auxiliary valve seat and having a pilot burner chamber means between said seats arranged to be connected to a pilot burner, a valve assembly comprising a movable member having an externally operable element for moving said movable member, interlinking means, a main valve operatively connected to said movable member by a portion of said interlinking means, a temporary flow arrester valve loosely coupled to said main valve by another portion of said interlinking means for operation thereof, said valves normally seating on said main and auxiliary valve seats, respectively, a pilot burner valve biased towards closed position and carried by said main valve and movable to open position affording communication between said chamber means and said passage means upstream of said main valve seat by said interlinking means, an armature connected to said main valve, an electromagnet carried by lsaid movable member and arranged to be moved into engagement with said armature and arranged to hold said armature when energized, `spring means between said main valve and said movable member biasing said main valve towards said main seat and normally holding said amature away from said magnet, spring means biasing said ow arrester valve towards said auxiliary valve seat, and spring means for returning said movable member to its initial position, all of said valves being closed when said electromagnet is deenergized while said externally operable element is released.

9. A safety valve device comprising a main body portion having passage means, said passage means having an inlet and a main outlet, said passage means also having main and auxiliary valve seats and a chamber between said seats, said body also having an auxiliary outlet communicating with said chamber, a valve assembly including a movable member having an externally operable element for moving said movable member, a main valve and a temporary ow arrester valve operatively connected to said movable member and normally seated on said main and auxiliary valve seats respectively, said body also being formed with a by-pass duct affording communication between said inlet and said chamber, and a by-pass valve for said duct normally biased closed and operatively connected with said externally operable element and movable member and movable to open position when said externally operable element is 'depressed to permit ow from said inlet through said by-pass duct and chamber to said auxiliary outlet, releasable coupling means operatively associated with said movable member for coupling the latter to said main and ow arrester valves on depression of said externally operable element and for moving said valves to open position on return of said externally operable element to its initial position to permit flow through said main valve seat to said main and auxiliary outlets, said by-pass valve returning to closed position to stop ow through said by-pass duct on such return movement, said coupling means being releasable to permit return of said main and ow arrester valves to closed position for shut olf of ow through said main and auxiliary outlets.

References Cited in the le of this patent UNITED STATES PATENTS 1,325,945 Jansen Dee. 23, 1919 2,271,506- Mantz Ian. 27, 1942 2,276,909 Alfery Mar. 17, 1942