US2332108A - Manual reset valve - Google Patents

Description

Oct. 19, 1943.

E. PAILLE 2,332,108

MANUAL RESET VALVE Filed April 18, 1942 Gttorneg I Patented-Oct. 19, 1943 I UNITED S'lA'I'ESlA'lENT OFFlCE MANUAL aesn'r VALVE Eugene Paille, Los Angeles, Calif assignor to General Controls 00., Glendale, ('JaliL,- a corporation oi. California Application April 18, 1

e42, Serial No. 439,493-

5Claims. (01.1??1-139) My present invention relate to fluid control valves, and particularly to those of the manualreset ty'pe whereina closure, member, normally biased to closed postion, is brought to open position by manual means, in which open position it is retained by means responsive to a controlling condition.

Manual-resetvalves of the type indicated have particular utility for thecontrol of fluidiuel supply to a burner, means responsive to the flame oi the burner then being provided for controllin the means by which th valve is maintained in 'open position. Such means may consist ofa thermostatic device for actuating a latch mech* anism; or, more commonly, a thermoelectricgen erator or thermal cut-out may be employed for fcontrolling the energization of electromagnetic holding means. In any event, upon extinction pi the bumer flame, the holding means become ineffective and the valve-closes, manuairesetting 'of the valve then being required for subsequent operation the burner. I

In a burner controljsystem, wherein the manual-reset valve 'is employed for controlling fuel supply to a main burner, for the ignition of which provided, it is desirable to provide means, eilective duringthe resetting operation, to prevent the possibility of unignited gas being passed to the mainburner while the pilot burner is extinguished. With this idea in "mind, it has been proposed that the closure member remain in its closed position during the resetting operation until the'condition responsive holding means iseffective, when, upon completion of the resetting cycle, theclosure member can reassume its open annular fibrous insertll cooperable with the seat IS. The closuremember is constantly urged 25 a normally constantly-burning. pilot burner is Figures 2 and 3 are fragmentary views, mainly in section, of the valve shown in Fig. 1', the parts being shown in diii'erent positions assumed in operation; and

Figures 4 and are views .of modified forms of pressure generating means. In the, drawing, the numeral l'l indicates a valve'casin'g having an inlet l2 and an outlet l3 separated by a partition l4 having an opening i5 therethrough, the upper end of the wall of the opening providing an annular valve seat I 6. Closing an opening in the upper .wall' ofthe casing ll, and'se'cured atits margin between the casing and the flanged lower end ere housing is bolted opening I9 is provided in the diaphragm for. the equalization of fiuidpressures-onthe opposite sides thereof. Secured centrally to the underside of the diaphragm i1, and guided-thereby, is a metallic closure member provided. with an away from the seat. It by a' helical spring 22 compressed between .the underside of the closure member and the lower wall ofthe'casing Centrally mountedon the upper side of the diaphragm J1 is. a fluid pressure motor, generally indicatedv at 25, comprisingan expansible-contractible metallic bellows 26 having upper and lower end- 30 walls, 21 and 28, respectively, which are joined to the bellows as by solder. The motor is secured to he diaphragm l1, asis also the closure membe 20,-by abolt 29.

. Mounted on the underside of the top wall of 5 the housing i8 is an electromagnet comprising position. This invention concem 'an improved form of such a device.

An'obie'ct of this invention is to provide, in a valve 0! the type indicated; a manually-controlled fluid-pressure-motor .for operating the reset sure member on its seat. v

Another object is to provide, in a valve of the type indicatedpa resetting means that can be manually controlled-0r operated from a point remote from the valve.

Other objects and advantages of my invention will be found in the description, the drawing, and

:the appended claimsf and for complete understandingof the invention, reference may be had to the following detailed description and accompanying drawing, wherein:

{Figure l is a sectional view of a manual-reset valve embodying my invention;

electromagnet is conveniently energized by a.

mechanism while simultaneously holding the cloa U -sha'ped'core' 3!, about oneleg' of which is wound an energizing coil 3-2; .lead wires 33 connect the coil with terminals 34, insulatingly mounted in the side wall oi the housing. The

thermoelectric generator 31 adapted to be heated by a pilot burner flame 38, the generator being connected tothe terminals 34 by wires 40. The upper end-wall 21 o'fthe motor 25 is of magnetic material and serves as an armature adapted to be magnetically held by the core 3| when broughtinto engagement'therewith by mechanical means.

Extending into an opening through the top wall of'the casing 18 and the baseof the'core 3| is a metal tube 4|, which carries at its free end a manually-operable air pump 42 comprising a cylinder '43 and a piston 44 for which an operating stem 45 isprovided. The. inner end of the tube 4| is fluidly connected withthe bellows chamber 48 by'aseconmbellows' 41 and an opening 48 ex thereto, is a flexible'diaphragm' H; .a screened "or the core 3|.

1 relieve this pressure.

tending through the upper end-wall 21 of the motor. The bellows 41 serves only asa yieldable fluid conductor and isjoined, as by solder, at one of its ends to the top surface of the end-wall 21 and .at its other end to the underside of the base I Th pum 42 is adapted, upon movement of the piston in one direction, to increase the fluid pressure in the bellows chamber 46, and upon reverse movement of the piston to Compressed between the core 3| and the end-wall 21, and encircling-the bellows 4'I, is a helical spring 49. The force of this spring is transmitted to the closure member 20 through a pair of rods 50 carried by the upper end-wall 21 of the motor. The force of spring 49 is considerably greater than that of the opposing spring 22.

The operation of the valve is as follows: assuming'the parts to be in the positions shown-in Fig. 1, the closure member 20 is held .on its seat ID by the force of spring 49 (and pressure of fluid at inlet of valve) againstathe opposingviorce of spring 22; and the el'ebtromagnet core 3| is energized by current from the thermoelectric generator 31, the pilot burner flame 38 being alight. If the pump 42 is now operated to increase the pressure in the bellows chamber 48,

this pressure will act downwardly on the lower end wall 28 to hold the closure. member 20 on its seat, and simultaneously exert a force to move the armature, or upper end-wall 21, into engagement with the pole faces of the core 3|; Upon such engagement, the upper end-wall will be magnetically held, and the spring 49 will therefore no longer exert a force on the closure member 20,-the same being held on its seat by the fluid pressure in the motor; the parts now being in the positions shown in Fig. 2. If the pump 42 is now operated to relieve thefluid pressure in the bellows chamber 46, closure member 20 will be moved away from its seat It by the force of spring 22, andassume its operated, or

open, position as shown in Fig. 3. Should the pilotburner flame become extinguished, upon resultant cessation of current generation by the device 31, the electromagnet will be deenergized, thus permitting the upper. end-wall 21 to move therefore to be limited only by the scope of the appended claims.

I claim as my invention:

1. In a'fluld control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member cooperable with 'said seat; means constantly biasing said closure member away from its seat; movable means normally in engagement with said closure member and adapted when in that position to exert a force on the closure member urging it toward its seat with a force greater than that of said biasdownwardly under the force of spring-49, which,

when the rods In engage the lower end-wall 28, t will exert a downward force on the closure member and move the same to its closed position against the force of spring 22; the parts reassuming the positions shown in Fig. l. Relighting of the pilot flame is, of course, necessary before the closure member can again be opened.

In Figs. 4 and 5 are-shown modifications of the means for varying thefluid pressure in the bellows chamber- 48. The bulb SI of Fig. 4 is fllled with fluid and is made of flexible material,

such as rubber, so that the fluid can be forced from the same through the tube 4|, and into the bellows chamber by manual operation. In Fig. 5, the numeral 52 indicates an expansion bulb adapted to be heated by an auxiliary bumer flame B3 to increase the fluid pressure on the bellows chamber, Obviously, any convenient, source of fluid under suitable pressure can be substituted for the pressuregenerating means shown.

- While I have herein shown and described, by way of illustratioma speciflc embodiment of my invention, I wish it to be understood that modiflcations may be made without departing from the spirit of the invention, and that I intend ing means; afluid pressure motor interposed between portions of said closure member and said movable means and comprising a pair of opposed and relatively movable walls; means extending exterior of said casing for varying the pressure of the fluid in said motor; said motor upon an increase in fluid pressure therein exerting a force effective to hold said closure member on its seat and simultaneously to move said movable means to a position wherein it is out of engagement with said closure member; and conditionpresponsive means forv retaining said movable means in its moved position so that the force exerted thereby on said closure member is removed; said motor upon subsequent decrease of fluid pressure therein being ineffective to exert said force holding the closure member on its seat so that the closure member is moved to open position under the force of said bias.

2. In a fluid c'ontrolvalve: a casing having a ported passage therethrougb provided witha valve seat; a closure member cooperable with said seat; means constantly biasing said closure memby increase 01 fluid pressure therein exerting a force eflective to hold saidclosure member on its seat and simultaneously to move said movable means to a position wherein it is out of engagement with said closure member; condition responsive means for retaining said movable means in its moved position so that 'the force exerted thereby on the closure member is removed; said bellows when contracted due to subsequent decrease of fluid pressure therein being ineffective to exert said force holding the closure member on its seat; and manually operable means extending exterior of said casing for varying the fluid pressure in said bellows.

W 3. In a fluid control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member cooperable with said seat; means constantly biasing said closure member away from its seat; a movable armature member normally in engagement with said closure member and adapted when in that position to exert a force on the closure member urging it toward its seat with a force greater than that'or said biasing means; a fluid pressure motor interposed between portions or said members and comprising an expansible-contractible bellows; manually controllable means for varying the pressure in said bellows; said bellows when expanded by increase or fluid pressure therein exerting a'torce effective to hold said closure member on its seat and simultaneously to move inlet and an outlet separated by a engagement with said closure member; and electromagnetic means for retaining said ar- 'mature member in its moved position so that the force exerted thereby on the closure member is removed; said bellows when contracted due to subsequent decrease of fluid pressure therein being ineflective to exert the force holding said closure member on its seat.

4. In a fluidcontrol valve: a casinghaving an ported partition provided with a valve seat; a closure member cooperable with said seat; means biasin said closure member away from its seat; a movable armature member normally in engagement with said closure member and adapted when in that position toexert a force on the closure member urging it toward its seat with a force greater than that of said biasing means; a fluid pressure motor interposed between said members and comprising a pair of opposed and relatively movable walls; manual means remote from said casing for varying the pressure of the fluid in said motor; fluid-conducting means interconnecting said manual means and said motor; a portion of said fluid-conducting means adjacent said motor being-yieldable; said motor upon an increase in fluid pressure thereinexerting a force eflective to hold said closure member on-its seat and simultaneously to move said armature to a position wherein it is out of engagement with said closure member; and electromagnetic means for retaining said armature in its moved position so'that the force exerted thereby on the closure member is removed; said motor upon subsequent decrease of fluid pressure therein'being ineflective to exert the force holding the closure member on its seat.

' 5. Ina fluid control valve: a casing having an inlet and an outletseparated by a ported partition provided with a valv seat; a closure; member cooperable with said seatimeans biasing said closure member away from its seat; an" armature member movable toward and away from saidclosure member; means urging said armature -member toward said-closure member with a force greater than that of said closure-member biasing means; means interposed between portions of said'member vand limiting their movement toward one another; said movement-limiting means being normally in a position engaging both of said members and when in this position adapted to transmit said armature-urging force to said closure member to urge the same toward its seat;

a fluid pressure motor comprising means forming an expansible-contractible fluid chamber interposed between portions of said members; manuallyoperable means remote from said casing for varying the fluid pressure in said chamber; fluid conducting means interconnecting said manually operable means and said motor comprisinga yieldable section adjacent said chamber; said motor upon an increase in fluid pressure in said chamber exerting a force effective to hold said closure member on its seat and simultaneously to move said armature member to a position wherein said movement-limiting means no longer engages both of said members; and electromagnetic means for retaining s'aidarmature in its moved position so that the force transmitted therefrom to said closure member is removed; said motor upon subsequent decrease or fluid pressure in said chamber being ineflective to exert the force holding said closure member on its seat.

H EUGENE PAILLE.

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