US2309709A

US2309709A - Manual reset valve

Info

Publication number: US2309709A
Application number: US406979A
Authority: US
Inventors: Paille Eugene
Original assignee: General Controls Co
Current assignee: General Controls Co
Priority date: 1941-08-15
Filing date: 1941-08-15
Publication date: 1943-02-02
Anticipated expiration: 1960-02-02

Description

Feb, 2, 1943. PN'LLE- 2,309,709

MANUAL RESET VALVE Filed Aug. -l5, 1941 I rm m m IIIIIA'IIIIIIIIIA H 7114 i! 7/ 1 'IIIII/7/II/III.

II II Z 3nventor:

EUGzF/YE p41; 1. E;

attorney.

reference may be had-to the Patented Feb. 2, i943 UNITED: STATES PATENT v o F cg v i 2.399305 I v Eugene Paille, Los Angeles,

Calif; assignor to General Controls 00., Glendale, Oaiit, a cor- ,poration of California I ApplicationAugust 15, 1941, Serial No- 406,979 v 8 Claims, (Cl: 137-139) Y .My present invention relates to fluid control description and accompanying drawing, valves and particularly to those of the manual wherein:

reset type wherein a closure member, normally biased to closed position, is brought to open position by manual means, in which open position it is retained by means responsive to a controlling condition. Manual reset valves of the type indicated have particular utility 'ior the control of fluid fuel supply to a burner, means responsive to theflame of the burner then being provided for controlling the means by which the valve is maintained in open position. such means may consist of a thermostatic device, such as an expansion rod, foractuating a latch mechanism; or, more commonly, a thermoelec trio generator or thermal cutout may be employed for controlling the energization of electromagnetic holding means. In any event, upon extinction of the burner flame, the holding means become ineffective and the valve closes,

manual resetting of the valve then being re-- quired for subsequent operation of the burner.

In a burner control system, wherein a manual reset valve is employed for controlling fuel supply to 'a main burner, for the ignition of which a normally constantly burning pilot burner is provided,it is desirable to provide means for closing the'main burner valve. during the resetting operation to prevent the possibility of unignitedgas being passed in the event the pilot burner has accidentally been extinguished. In the prior art, it has' been proposed to provide additional means for closing-the valve while moving the closure member into theopen position wherein it should be retained by the condition responsive means. It is therefore an object of my invention to obviate the necessity of such-additional closing means by providing means whereby the closure member is positively maintained in closed position during the resetting operation and can only subsequently move to open position in the event that there is flame at-the pilot burner. 1

Another obleetof my inventionis to provide means for simultaneously applying a closing force to the closure member while raising an armature into engagement with its electromag- "net core; the armature, when unenergized, servmg to, maintain the closure member in its closed position.

Other objects of my inveninc.- and the chime For complete of the invention,

followin detailed valve embodying a modified form of my invention; and

Figure 5 is a fragmentary horizontal section taken along the line 8-5 of Fig. 4.

In the drawing, the numeral H indicates a valve casing having an inlet l2 and an outlet l3 separated by a partition ll having a port opening it therethrough, the upper end of the wall of which provides an annular valve seat l6. Extending from the bottom wall of the casing ll, centrally of the port 15, is aboss l'l having in its upper end a recess I8 provided with a supplemental annular valve seat 20. By means of a passage is the recess l8 communicates with the exterior of the valve casing.

Secured between the upper wall of the casing ll and the flange 24 of a housing 25 is the marginal portion of 'a flexible diaphragm 25, on the underside of which is a closure member 21, preferably of flbrous material, cooperable with the valve seats l8 and 20, and urged away from the seats by a'spring 2| compressed be- I tween the closure member and the bottomwall of the casing. On the upper side of the diephragm 20 is a circular metal disk 20 having in its upper surface a conical recess 29 communlcating with the recess It by a tubular member "ll extending through openings in the disk II, diaphragm 20,.and the closure member 21.

The laterally extending lower end portion of;

the tubular member 30 provides an auxiliary.

valve seat 3|, while its upper end portion is riveted over to secure the disk" and the closure member Tito the diaphragm 26. The

fastened in an opening in the diaphragm and provided with a flne mesh screen. The eyelet I! also permits passage of fluid from the inlet l2 to the interior of the housing 25 whence, via

' the recess 29 and-the tubular member 3|! it my flow (when member'33 is away from seat 3|) to the recess 13 and thence, by passage N to the exterior of the valve.

Secured to the underside of the top wall- 35 of the housing 25 by screws 31 is a U-shaped electromagnet core 38,- about one leg of which is wound an energizing coil 33 connected by lead wires 4| with terminals 43, insulatingly mounted in a side wall of the housing. Slidable in an opening through the housing top wall 33 and the core 38 is a rod 42 having an enlarged end portion 43 forming a button to facilitate manual operation. Compressed against a pin 44 extend ing through the rod 42 is'a spring 45 constantly urging a sliding collar 43 against a fibrous packing 41; thereby preventing any leakage of fuel around the rod 42 to the outside of the casing.

Freely slidable on the rod 42, and guided thereby, is a circular armature 43 cooperable at its upper surface with the pole faces 43 of the core 38. A compression spring 35 urges the armature 43 away from the pole faces, but is not of'such strength as to overcome the magnetic-holding force of the core when the same is energized. The underside of the armature 48 is recessed to receive certain mechanism, to be hereinafter described, while its upperside is built up at 54 to maintain a relatively uniform flux path between the core pole faces 48. g

'Threaded on the reduced lower end portion of the rod 42 is a collar 5| having, on-either side thereof, slots for the reception of the inner end portions of arms '52, which armsare held in place by pins onwhich the arms are free to pivot. The outer portion of the upper side of the circular disk 28 slopes downwardly toform, in coniunction with the periphery of the recess 29, a shoulder 53 which acts as a fulcrum about which the arms rotate upon actuation of the mecha- The operation of the device is as follows;

that the valve is connected to supply fuel to a main burner and that a pilot burner for the main burner is connected to the supple- ;mental outlet I! by a pipe 22 having 8 fitting 23 threaded in the enlarged outer portion of outlet IS; with theparts in the positions shown in Fig. 1, fuel flow to the main burner is obstructed by the closure member 21, and to the pilot burner by the closure members 21 and 33. If the rod 42 is now depressed against the force of spring 34 by applying pressure on button 43, the arms 52, bearing on the shoulder 53, will exert a down ward force on the disk 23, thus holding the closure member firmly on its seat I against the upward force of spring 2|. with the shoulder 53 acting as a fulcrum about whichthe arms 60 .52 rotate, this downward movement of the inner it now may be lighted. the coil u is outl ed 76 Assuming, now, that -wayqfillust1ation.speciflc inventiomIwishittobeimderstoodthatmodiby means such as a thermoelectric generator responsive to the flame of the pilot burner, ignition of gas at the pilot burner will soon cause ener ization of the electromagnet core 33 sufficient to hold the armature against the force of spring 35. If the pressure applied on button 43 is now decreased, spring 34 forces (through valve stem 32) rod 42 upward, thus raising the inner Y ends of the arms 52. As theseends rise, they no longer transmit the downward force from rod 42 to disk 28, and the main closure member 21 immediately moves away from its seat since the only material force now tending to hold it in closed position is the weight of disk 28 which is overcome by the upward force of spring 2|. Auxiliary closure member 33 has not entirely closed when the main closure member leaves its seat, and gas may now also flow from inlet l2. past the supplemental valve seat 20, through 20 recess I8 and passage iii to the pilot burner; and

through port i5 and outlet l 3 to the main burner. Release of rod 42 will permit spring 34 to move closure member 33 to its fully closed position; the parts assuming the positions shown in Fig. 3.

Upon accidental extinction of the'pilot burner flame, the electromagnet is no longer energized and armature '48 moves downwardly under the force of spring 35. The force of this spring, in

combination with the force of gravity acting on armature 43 and disk 28 is suflicient to overcome the counterforce of springs 2| and 34 to close the main and supplemental ports; the parts reassuming their normal positions as shown in Fig. 1'. It will be apparent that if the weight of members 23 and 43- is made suiiicient to overcome springs 2| and 34, spring 35 'may be omitted. Spring 34 obviously exerts a greater closing force on auxiliary closure member 33 than spring 45 exerts on rod 42, inorder to insure the seating of auxiliary closure member 33.

The modified form of my invention shown in Figs. 4 and5issimilartothat shown inFiss. 1-3. the only essential difference being that a single resilient member is substituted for the two arms 52 of Figs. 1-3. Firmly held between two nuts 6| threaded on the lower end portion of the rod 42, is a normally flat elongated resilient member 62. the mid portions of which are engageable, in operation, with the shoulder 53 of the disk 23. The resilient member 52 is reduced in width at its outer portions, as shown in Fig. 5, to prevent lateral buckling when forced against the shoulder 53. The operation and results are the same as in the mechanism shown in Figs. 1-3, i. e. downward movement of rod 42 causes the resilient member 52, fulcrumed on shoulder 53, to flex, exerting a downward force on disk 23 and, through its outer ends, an upward force on armatureltr T-he pomtions assumed by the members 82 and when operated are shown in broken lines in Fig. 4. A spring ll serves the dual purposeofm'gingthemainclosurememberfl to- .ward its seat while constantly exerting pressure -on a metal-washer 123:0 hold a fibrous packing "13 against the core 33-to prevent leakage of gas fications may be made without departing from the spirit of my invention and that I intend.

therefore, that my invention be limited only by the'scope of the appended claims.

I claim as my invention:

1. In a fluid control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member cooperable' with said seat; a first means constantly urging-said closure member away from its seat; a second a means normally urging said closure member toward its seat with a force greater than that of said first means; a lever having p rtion interposed between said closure member and said second means; means on the cl'osurememberiorma force greater than that of said first means;

ing a .fulcrum for said lever; means extending to the exterior of the casing for operating said lever; said lever being movable in one direction '-to simultaneously create a force'tending to hold said closure member on its seat and move said second means to a first postion wherein its force on the closure member is removed; and condition responsive'means for retaining said second means in said first position; said lever being movable in an opposite direction to a position wherein, when said second means .is retained by said condition responsive means, the lever. no longer exerts said force tendingto hold said closure member on its seat 2. In a fluid control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member cooperable with said seat; a first means constantly urging said closure member away from said seat; a second means, including a movable armature, normally tained by said electromagnetic means, the lever. no longer exerts said iorce tending to hold said closure member on its seat. r

. 4 In a fluid control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member cooperable with said seat; afirst means constantly urging said closure member away from said seat; a second means, including a movable armature, normally urging said closure member toward its seat with pivoted lever arms interposed between. said closure member and said armature; means on the closure member providing a fulcrum for said lever arms; a reciprocable rod extending through I said armature and said casing for actuating said lever arms and providing, on its inner end por-. tion, means for pivoting s'aid lever arms; said lever being movable in one direction to simultaneously create a force tending to hold said closure member on its seat and move said armature to a first position wherein theforce of said second means on said closure member is removed; and condition responsive electromagnetic means for retaining said armature in said first position; said lever being movable in an opposite direction to a position wherein, when said armature is retained by said electromag- 1 netic means, the lever no longer exerts said force urging said closure member toward its seat with a force greater than that of said first means; a

.lever having a portion interposed between said closure member and said armature; means on the closure member providing a fulcrum for said lever; means extending to the exterior of said casing for actuating said lever; said lever being movable in one direction to simultaneously create a force tending to hold said closure member on itsseat andto move said armature to a'first position wherein the force of saidsecond means on said closure member is removed; and electromagnetic means for retaining said armaturev in tending to hold saidclosure member on its seat.

5. In a fluid control valve: a casing having a ported passage therethrough provided with avalve seat; a closure member movable toward and away from said seat to control fiuid flow through the valvermeans constantly biasing said closure member towardopen position; means located at the side of said closure member away from said seat for normally urging the closure member toward its seat with a force greater than that produced by said biasing means; said last-named means including a member movable on the axis of said closure member toward and away from the same; a rod reciprocable in a central opening in said movable member; mechanical means interposed between the closure member and the movable member and connected to said rod; said said first position; said lever being movable in an opposite direction to a position wherein, when said armature is retained by said electromagnetic means, the lever no longer exerts said force tending to hold said closure member on its seat.

3. In a fiuid control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member cooperable with said seat; a first means constantly urging said closure member away from said seat; a second means, including a movable armature, normally.

urging said closure member toward its seat with a force greater thanthat of said'firstnieans; a

resilient lever having a portion inted between said closure member and said armature; means on the closur member providing a ful- 'crum' for said lever; a reciprocable 'rod extend-. ing through said armature and said casing to the exterior thereof for actuating said lever; said lever being movable in one direction to simul- ,taneously create a force tending to hold said closure member on its seat and to move said armature to a first position wherein the force of said second means on said closure member is removed; and condition responsive electromagnetic means for retaining said armature in saidfirst position; said lever bein movable in an opposite' direction, by the actuation of said rod, to

a position wherein, when said armature is relast-named means being eflective when said rod is moved in one direction to create a force tend- "ing to urge the closure member against its'seat and simultaneously to move said movable member in a direction away from the closure member to a position wherein its force thereon is re-' moved; and means responsive to a controlling condition for retaining said movable member in said moved position; said mechanical means be.-

- ing eflective when said rod is subsequently moved means adjacent the; side of said closure "member away from said seat for normallyurging the closure member toward its seat with a force greater than that produced by said biasing means; said last-named means including a member movable on the axis of said closure member...

toward and away from the same; a rod reciprocable in a central opening'in said movable member; lever elements interposed between said closure member and said movable member and connected to said rod; said elements extending on opposite sides of said rod and free .to pivot thereon; means on said closure member providing a fulcrum for said elements; said elements being effective when said rod is moved in one direction to create a force tending to urge .the closure member toward its seat and simultaneously to move said movable member in a direction away from the closure member to a position wherein its force thereon is removed; and means responsive to a controlling condition for retaining said movable member in said moved position; said lever elements being efiective when said rod is subsequently moved in an opposite direction to relieve the force produced by the elements, whereby the closure member is free to move to its open position under the influence of said constant bias.

7. In a fluid control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member movable toward and away from said seat; means constantly biasing said closure member toward open position; means adjacent the side of said closure member away from said seat for normally urging the closure member toward its seat with a force greater than that produced by said biasing means; said last-named means including a member movable on the axis of said closure member toward and away from the same; a rod reciprocable in a central opening in said movable member; a resilient element interposed between said closure member and said movable member and connected to said rod; means on said closure member providing a fulcrum for said element; said element being eiiective when said rod is moved in one direction to create a force tending to urge the closure member toward its seat and simultaneously to move said movable member in a direction away from said closure member to a position wherein its force thereon is removed; and means responsive to a controlling condition for retaining said movable member in said'moved position; said resilient element being effective when said rod is subsequently moved in an opposite direction to relieve the force produced by the element whereby the closure member is free to move to its open position under the influence of said constant bias.

8. In a fluid control valve: a casing having a ported passage therethrough provided with a valve seat; a closure member cooperable with said seat; a spring constantly urging said closure member away from its seat; a spring-biased member normally urging said closure member toward its seat with a force greater than that of said spring; a lever having a portion interposed between said closure member and said springbiased member; means on one of said members forming a fulcrum for said lever; means extending to the exterior of the casing for operating said lever; said lever being movable in one direction to simultaneously create a force tending to hold said closure member on its seat and to move said spring-biased member to a first position wherein its force on the closure member is removed; and condition responsive means for retaining said spring-biased member in said first position; said lever being movable in an opposite direction to a position wherein, when said springbiased member is retained by said condition responsive means, the lever no longer exerts said force tending to hold said closure member on its seat.

EUGENE PAILLE.