US2290108A - Thermoelectric valve - Google Patents

Description

July 14, 1942. H. A. MANTZ THERMOELECTRIC VALVE l 2 Sheets-Sheet 2 Filed June 29, 1939 om m J5 JJ JQa'fezzff foZd-Mani bm/M, ma WW Patented -July 14, 1942 UNITEDISTATES* Harold A. Mantz, Milwaukee, Wis., assigner-to Milwaukee Gas Specialty Company, Milwaukee, Wis., a corporation'of Wisconsin Application June 29, 1939, serial No. 281,762

, r rz claims.

This invention relates to safety devices for. heating and other apparatus, and has 'particular relation to an improved thermoelectric valve for automatically shutting off the fuel supply for a burner upon extingulshment of a pilot light iny juxtaposition to the burner.

In its illustrated embodiments,` the thermo- I electric valve of the present invention is disposed in the fuel supply pipe leading to the burner and has an-electromagnet and an armature which,

when attracted. is adapted to hold the valve open to permit the desired supply ofA fuel to the burner,l

and when the armature. is retracted the valve moves to closed position to shut oil the supply of Figure 2 is a fragmentary top plan view of the device as viewed in Figure 1;

Figure 3 is a fragmentary vertical section taken on the line 3-3 of Figure 1;

Figure 4 is a fragmentary vertical section similar to Figure 3 and showing modied means for by-passing fuel for the pilot burner to supply the same with fuel duringv the resetting operation: fand v Figure 5 is a fragmentary sectionalview showing metering means for the pilot supply of fuel y from the outlet chamber tothe pilot burner.

Referring to the drawings, the device shown in Figures 1 to 3, inclusive, comprises a valve body fueltothe burner. The electromagnet is adapted l5 ,I0 having a fuel inlet II'and a fuel outlet I2 to be energized to hold the valve open as long as the pilot Vburner is ignited by heating of a thermov couple which is placed in position to be heated by the pilot burner and is connected in circuit with the electromagnet.

The burner may be the main burner for a space or room heater, or for a water heater, 'or it may be an oven burner or one or more topburners of a gas range or any other burner. v One of the main objects of the invention is to provide an improved form of thermoelectric valve of the general character above ,set forth and which is adapted to be reset without opening the valve to set up the supply of fuel to the main burner until the pilot burner has been lighted and, by the heat thereof on the thermocouple, has energized the electromagnet sufliciently to hold the armature in attracted position.

Another object of the invention is to `provid v v improved means foy by-passing fue] for the pilot its open lower end with an external flange 2|. A

burner through or around the main shut-oil valve while it is in closed position to supply fuel to the vpilot burner during the resetting operation and.

until the main shut-oil valve is actuated to open position, and' for continuing the supply of fuel to-the pilot burner after the main burner is open.

It is also an object of the invention to provide an improved form of thermoelectric valve of relav tion will be apparent from the following detailed descriptiontaken in connectionrwith the accompanying drawings, in which:

Figure l is a vertical section through a thermowhich are tapped internally to receive the inlet and outlet pipe sections of the fuel supply pipe leading to the main burner. The valve body I0 has an intema'l wall or partition I3 which has a y 20 valve opening Il through which communication is adapted to be eected between the inlet chamber I5, which is in communicationwith the inlet II, and the outlet chamber I6, which is in com-y munication with the outlet I2. The valve open- 25 ing 'Il is surrounded by a valve seat I8.

The lead connection hood and electromagnet, armature, and valve assembly is mounted upon .lthe top of the valve body I0 as the same is viewed' .in Figure 1, and when in place, closes the` open 30 upper end of the valve body. 'I'he hood 2U, which' is preferably formed of Bakelite, or any other suitable or preferred insulating material; inthe illustrated embodiment of the invention is of gen- `erally cylindrical cup-shaped form provided at 40 fuel which passes through the valve body. The

hood 20 and shell 22 are clamped to the top Aol? the valve body by a union nut 24 having threaded engagement with the valve body and with the shell 22 fitting into the open upper end of the vvalve body. A gasket may be provided at 25:

The electromagnet, which is sealed within the hood 2li, ,comprises a magnet frame 28. The 'particular magnet frame shown in the drawings is of U-shaped form, but this may vary widely within the scope of the present invention. The magnet frame 23 has a reset stem 29 formed integral therewith or suitably secured thereto. The reset stem 29 extends outwardly through an opening 30 centrally through the top of the hood 20 and electric valve embodying the present invention 55 vthrough the interior of a hollow boss 32 integral 'magnet frame, although this may vary.

with the hood 23. The opening 38 is sealed by packing 33. A reset button 38 is threaded or otherwise suitably secured at 35 upon theY outer end of the stem 29 and operates or is guided slidingly within the boss 32.

YA coiled spring 36 is coiled about the stem 29 and interposed between the button 313 and a washer 31 which engages against the packing 33. The spring 36 normally holds the button 38, stem 28, and the electromagnet connected thereto, in outwardly projected position as shown in Figure 1, and serves to move these parts to the positions shown, as will presently appear. The spring 36 also serves to compress and hold the packing 83 in tight sealing relation about the opening 30.

Fixed rigidly in the hood 28 as, for example, by molding the insulating material of the hood thereto and extending lengthwise from the hood are a pair of spaced metallic terminal posts 38. These terminal posts 38 have aligned openings 39 and are split outwardly of these openings as shown at c6. A coil clamp di is positioned upon the magnet frame 28, and is flanged outwardly at its inner end, and the electromagnet coil 62 surrounds the legs of the magnet frame and the legs of the coil clamp 6l, as shown. The opposite terminals of the coil 82 are connected to the inner ends of the respective terminals posts 38 by iiexible conducting connectors 65. The posts 38 may have reduced portions at e6 to assure firm anchorage in the hood 20. The coil 42 may be covered with insulation as shown, and the exible connectors 85 may be extensions of the opposite ends of the coil, the ends of the connectors being bared for good contact with the posts 38 where they are connected thereto.

The armature 50 is .disposed within the hood 20 and-is also sealed from the gaseous or other fuel by the shell 22. The armature 58, which is shown as of disc-like form and as secured to the upper end of a reciprocatory armature stem I is adaptedto be held in attracted position against the pole ends of the magnet frame 2B upon ener.. gization of the electromagnet. The attachment of the amature 58 to the stem 5I may, if desired, be sumciently loose to permit self-accommodation of the armature to the pole ends of the The stem` 5I vis disposed generally concentrically of the hood 20 and valve I0, and extends inwardly orreciprocating movement through an opening 52 in the outwardly raised central part of the shell 22. 'I'he opening 52 is sealed against leakage of the gas or other fuel or other deleterious substances into the hood 28 from the valve body by packing 53.

The valve disc 55 is held upon the lower end of a valve stem 5|' by a snap ring 56 which is engaged in an annular groove in the headed lower end of the stem 5I'. The ring 66, by ensagement with an annular flange 58 on the valve disc 55 compels movement of the valve disc outwardly to open position with outward movement of the armature 58 and stem 5l as will hereinafter appear. The particular valve disc shown in the drawings has a valve disc gasket or yielding seating material 59 secured thereto by a valve disc screw 60, but this may, of course.. vary. With the valve disc 55 positioned as shown. the valve disc gasket or yielding seating material 59 seats against the valve seat I8 and closes cornmunication betweenthe inletchamber I5 and the outlet chamber I6 through the valve opening It.

The valve stem 5I' is headed at its outer end at 62. and this headed end (i2-operates slidingly within the interior of the hollow armature stem 5I,` the inner end of which is turned or flanged inwardly at 63 for cooperation with the head 62 on the stem 5I'. A cam disc 6B is loosely mounted at 65 on the stem 5I and is flanged or turned inwardly at 6B for cooperation with the inner end of the stem 5I. A coiled spring 68 is interposed between the cam disc 66 and the valve disc 65 land serves to close the valve when the electromagnet ceases to hold the armature 50 in attracted position. The spring 68 also, through the cam disc 64 andby cooperation of this cam disc with a bearing washer10, serves to compress and hold the packing 53 in tight sealing relation about the opening 52.

The tube I4 for supplying fuel to the pilot burner is connected to a hollow boss 15 extending laterally from the valve body Ill outwardly of the valve seat I8. The boss 15 has a passageway 16 extending therethrough for supplying fuel to the pilot burner supply tube 1l. The tube 14 is joined at its inner end to the hollow boss 15 by a unionl nut 11 having threaded engagement with the boss 15, and the union is sealed by a union sleeve V18. The outer end of the tube 1B is connected to a suitable pilot burner (not shown), which pilot burner is disposed in juxtaposition lto the main burner for the purpose of lighting the same, as well understood in the art. The pilot burner may be of any suitable or preferred form.

The passagewayl is provided within its length with an inwardly extending annular flange 19 which sndingly supports a puoi; vaive p1unger auf Outwardlyof the ange 19 the passageway 16 has a valve seat 8l. The valve body I0 is provided with a by-pass opening 62 which is adapted to place the inlet chamber I5 in communication with the passageway 16 inwardly of the valve seat BI. -A second by-pass opening 83 formed in the valve body I0, and preferably smaller in diameterthan the passageway 82, is adapted to place the outlet chamber I6 in communication with thepassageway 16 outwardly of the seat 8|.

The pilot valve plunger 80 is provided at its outer end with a valve head 84 which is adapted to seat upon the valve seat 81| to shut on communication between the inlet chamber I5 and the passageway 16 through the opening 82. A

. valve button 86 is x'ed as, for example, by

threaded engagement upon the inner end of the stem or plunger and operates'slidingly in the inner end of the passageway 16. A spring 81 is coiled about the plunger 8D and interposed between the button 86 and the ilange 19. spring 81 normally holds the plunger 80 and button 86 yieldingly in inwardly projected position, and the valve head 84 of the plunger 60 seated upon the valve seat 8|. The inner end of the button 86 is rounded or otherwise suitably formed for cooperation with the tapered cam surface 90 of the cam disc 64.

The passageway 83 is provided with a check valve or other suitable valveas indicated at IIU which, when the part 5I 4is cocked and the pilot fuel iiows throughv the passageway 82 to the pilot burner, preventsthe pilot fuel from entering the outlet chamber I6 through the passageway 83 before the main valve is opened.

The thermocouple (not shown) and lead connection therefor may be of the general character disclosed and claimed in Oscar J. Leins' Patent No. 2,126,564, granted August 9, 1938, or of any The.

other-suitable or preferred form. The terminal end of the thermocouple lead connection, except for the differences shown, is, in general, of the type disclosed and claimed in the copending application of Clarence Wantz, Serial No. 239,790', illed November l), 1938. The thermocouple is placed in position to be heated by the pilot light and is connected in circuit with the electromagnet, and particularly with thecoil @i2 thereof, through the terminal posts 48.'

rifhe particular thermocouple lead connection shown in the drawings comprises an inner lead conductor 9? which is joined to the inner thermocouple member to form an internal thermal junction, and an outer lead conductor tt which 'is connected to the outer thermocouple member to form another thermal junction. The two thermocouple elements are joined to form a third thermal junction which is adapted to be heated by the pilot light, as well understood in the art. The outer lead conductor t3 encloses the inner lead conductor S2, and the inner lead conductor 't2 is insulated from the outer lead conductor by a wrapping of insulation on the inner lead conductor, as indicated at 9d.

The thermocouple lead connection is preferably of a character that will permit bending, as desired, to permit disposing the thermocouple in any desired position. The lead connection .may be of a character to support the thermocouple in any desired position, although supporting brackets or other means may be employed for this purpose. The end of the inner lead conductor opposite the end connected to one of the thermocouple elements extends from the outer .lead conductor S3 and has a metallic terminal mocouple is connected to the posts 38 by slipping. f

the terminal end ofthe thermocouple lead means vthrough the opening 39 in one terminal post 38 and into the opening 39 in the other terminalA post, with the terminal sleeve in the opening in one,"post and the end of the tubular thermocouple lead 93 in the opening in the other terminal post. Screws 98 ,are then tightened to clamp the split portions of the terminal posts into good conductive -contact and' gripping engagement with the terminal sleeve 95 and tubular lead 93, respectively. The thermocouple is disconnected from the device by loosening the screws 98 and withdrawing the terminal end of the thermo couple lead from the posts 38. The operation of the device is as follows:v When the pilot burner or the other flame to the heat of which the thermocouple is subject is extinguished, the electromagnet is deenerglzed, or at least the holding action thereof ceases to be suicient to hold the armature 50 attracted to the :poles of the magnet frame 28, vand the spring 68 compels the valve 55 to closed position .When it is desired to reset the device thereset button 3d is pressed inwardly. This results in moving the magnet frame 28 inwardly to engage its-poles with the armature 5t. Continued inward movement of the reset button trl thereupon moves the armature 5u and its stem 5l inwardly with respect to the valve stem 5l.v The armature stem 5, upon inward movement, engages the inturned or inwardly hanged inner end t@ of the hub part o the cam disc St and forces this cam disc inwardly. ri'he cam disc tt, in its inward-movement, engages the pilot valve button 8h and forces same outwardly against the tension ofthe spring el, unseating the valve head t@ to permit a pilot supply of fuel which is under pressure in the inlet chamber l5 to flow through the burnerwhere it can be ignited as it issues from. the pilot burner The ypilot burner is then lighted and the heat of the pilot darne upon the hot junction of the thermocouple creates a thermoelectric current in the coil l2 of the el :ctromagnet which energizes the electromagnet s .1d causes the armature at to be held positively against the inner end of the magnetv frame 28 by magnetic attraction. As a result, when the reset button 35 is released the spring t6 moves or returns the button @t to its outwardly projected position. The outward movement of the button 3d moves the electro- ,magnet outwardly' therewith, and the valve member 5t, being held attracted by magnetic attraction to the magnet frame 2t, is moved outwardly to open position. movement of the armature, the-cam disc Mis released and actuated outwardly by the spring as shown inFigure 1, thereby shutting off the supply of fuel to the main burner` through the outlet l2. In the movement of the valve member 55 to closed position, the headed outer'end 462 of the valve stem 5I', by engagement with the inturned or inwardly flanged inner end of the hollow armature stem 5l, moves the armature 50 to retracted position as shown.

vthe main burner or burners.

St, thus releasing the pilot valve button tt, and

lthe pil-ot valve dfi is returned to its seat and f closes o the pilot supply of fuel to the tube it throughthe passageway S2.

Before closing oi the by-pass passageway 82 l' the valve 55 is in open position and the desired supply of fuel for the pilot burner is set up from the outlet chamber I6 through the by-pass pas-A sageway 83. It isto be understood that the showing of the by-pass passageway 83 is illustrative and more or less diagrammatic. If, because of the greater amount of fuel outlet open'- ing at the main burner, the by-pass passageway 8,3 does not supply the desired pilot' supply of fuel to the pilot burner from the outlet chamber i6 when the valve 55 is open, the passageway 83 may be disposed in any other suitable-or preof fuel to the In other words, the electromagnetf is now in its outwardly projected position and the armature is held in attracted position to the magnet frame 28, thereby holding the valve A55 open.

The fuel Hows from the inlet chamber l5 through the valve opening ld and outlet chamber I6 to At the same. time sufficient fuel is supplied to-maintain the pilot burner. Upon extinguishment of the pilot burner the electromagnet is immediately deenergized, or at least immediately ceases to hold the armature 5t in attracted position. The spring 63 thereupon forces the valve 55 to closed position to shut o the supply of fuel to the main burner and-the pilot supply valve. Bdis closed to shut off the supply of fuel to the pilot burner through the by-pass passageway 82 and until the reset button is actuated to 'reset the device, as already described.

Upon the outwardv The mounting vof the electromagnet with the exible connectors at 45 permits the inward and outward movement of the electromagnet with the resetting button, and the armature 50 and valve ISE-are connected provides a simple, effective, and inexpensive construction. Moreover, the cam disc 6l, manner of operation by the resetting means for the electromagnetic valve, provides a fective and inexpensive arrangement for opening the by-pass passageway 82 to set up the desired supply of fuel to the pilot burner in the resetting operation.

In Figure 5, the passageway 83", which corresponds with the passageway 83 in Figure 3, is shown provided with a metering screw 2 for. metering the pilot fuel supply from the outlet chamber I6" to the pilot burner. pilot fuel supply may be metered or regulated in any other suitable or preferred manner.

In the modiiled form of control for supply to the pilot a tubular valve housing is threaded axially into the main valve member 55', there being a valve washer provided at |0|' and corresponding with the valve washer |0| in the preceding embodiment of the invention. Threaded into the the fuel burner as shown in Figure 4,

- Y aaoodos I claim:

' bination, a body. an insulating hood 4on said body,

the manner in which with its simple, ef-

Of course the V valve housing |00 is a valve cap |02 having an orifice |03 opening into the outlet chamberl |6' of the valve body l0'. The passageway 0 3' is adapted for supplying fuel for the pilot burner from the outlet chamber |6 to the pilot supply tube 14'.

The interior of the valve housing |00 has a valve seat |05, and mounted in the valve housing |00 .is a pilot valve plunger |06. This `valve A plunger |06 is normally seated against the seat |05 by a spring |08 to shut off the pilot supply terminal means on saidhood. a stem extending slidingly through an opening in said hood, an electromagnet carried by said stem and movable to outwardly and inwardly projected positions therewith, and flexible' connectors connecting said electromagnet in circuit with the terminal means on said hood.

2. In a device of the class described, ln combi-` lnation, a body having an interior portion opening therefrom, a hood on saidbody, said hood having an interior portion opening from the hood adjacent the opening of the interior portion of the body from said body, terminal means on said h ood, -a stem extending slidingly through an opening in said hood. an electromagnet carried by said stem and'movable to outwardly and inwardly projected positions therewith, means connecting said electromagnet in circuit with the terminal means on said hood, means secured to said body with said hood for sealing the interior of the hood from the interior of said body, an armature disposed within said hood and having attracted and retracted positions, an amature stem connected to said amature and operating slidingly through said sealing means with its inner end disposedin the body, a member having a stem connected to said amature stem for sliding movement relative thereto, a cam actuated by of fuel into the outlet chamber I6' through the orice |03. A port or opening I|0 places the interior of the hollow hub part of the valve disc 55 in communication with the inlet chamber 5'.

In the resetting operation of the device the armature stem 5|" is projected inwardly as in the preceding embodiment, and in its inward movement engages and unseats the pilot control valve |06 from its seat |05. A pilot supply offuel thereupon passes from the inlet chamber I5' through the port ||0 and the interior of the hub part of the valve disc 50' and out past the seat |05 and through the orice |03 into the outlet chamber I6'. This pilot-supply of fuel passes from the outlet chamber I6' through the passageway 83' and pilot tube 'M' to the pilot burner. When the valve disc 66' is closed with the armature stem 5|" released for movement to its outwardly projected position, the valve |06 closes and shuts o the supply of fuel to the pilot burner, and when the valve 55' is openthe fuel passes from the inlet chamber through the valve opening I4 into the outlet chamber, and from the' outlet chamber to the main burner and also through the duct-83' to the pilot burner. As in the preceding embodiment of the invention, the i 4 duct arrangement shown at 83' 4is more orless Y diagrammatic, and it is to be understood that if inward movement o! said armature stem, and a pilot valve actuated by said cam.

3. In a device of the class described, in combination, a valve body, a hood on said body, terminal means on said hood, a stem extending slidingly through an opening in said hood, an electromagnet carried by said stem and movable to outwardly and inwardly projected positions therewith, means connecting said electromagnet in circuit with the terminal means on said hood. means secured to said valve body with said hood for-sealing the interiorof the hood from the interior of the valve body. anarmature. disposed within said hood and having attracted and retracted positions, an armature stem connected to said armature and operating slidingly through said sealing means with its inner end 'disposed in the valve body, a valve member having a stem connected to said armature stem vfor sliding movement relative thereto, a cam actuated by inward movement of said armature stem, a pilot valve actuated by said cam, and a. spring interposed between said ilrst valve and said cam for moving said rst valve to closed position and said armature to retracted position.

4. In a device of the class described, in combination, a valve body having an inlet chamber and an outlet chamber, a hood on said body, terminal means on said hood, a stem extending slidingly throughan opening in said hood, an electromagnet carried by said stem and movable to outwardly and inwardly projected positions therewith, means connectingsaid' electromagnet in circuit with the terminal means on said hood. means secured to said valve body with said hood for sealing the interior of the hood from the interior of saidvalve body, an armature disposedv aaeaioe ward movement of said armature stem, a pilot valve actuated by said cam, a spring interposed between said first valve and said cam for moving said first valve to closed position and said armature to retracted position, a Afuel supply tube for a pilot burner connected to said valve body, a passageway adapted for supplying fuel from said inlet chamber to said lpilot supply tube, and a valve actuated laterally to open position by said cam lupon the resetting operation for establishing a supply of fuel for a pilot burner and shutting od the fuel supply for the pilot burner whenl said first valve is closed.

5. In va. device of the class described, in combination, a valve body having an inlet chamber and an outlet chamber, a hood on said body, terminal means on said hood, a stem extending slidingly through an opening in said hood an electromagnet carried by said vstem and movable to outwardly and inwardly projected positions therewith, means connecting said electromagnet in circuit with the terminal means on said hood, means secured to said valve body with said hood for sealing the interior of the hood from the interior of said. valve body, an armature dis- `posed within said hood and having attracted and retracted positions, an Varmature stem connected to said armature and operating slidingly through said sealing means with its inner end disposed in the valve body,a valve member having a stem connected to said armature stem for sliding movement relative thereto, a cam actuated by inward movement of said armature stem, a pilot valve actuated by said cam, a spring interposed between said first valve and said cam for moving said first valve to closed position and said armav ture to retracted position, a fuel supply tubefor a pilot burner connected to said valve body, a passageway adapted for supplying fuel from` said inlet chamber to said pilot supply tube, a valve actuated laterally to open position by said cam upon the resetting operation for establishing a supply of fuel for a pilot burner and shutting ofi theiuelsupply for the pilot burner. when said first valve is closed, and means for establishing a supply of fuel for the pilot burner when said first valve is open.

6. In a device of the class described, in combination, a valve body, a hood on said body, a reset stem extending slidingly through an open'- ing in said hood, an electromagnet carried by said reset stem, an 'armature within said hood and having attracted and retracted positions, an

armature stem connected to .said armature and extending into said valve body, a cam on said stem and actuated thereby, a pilot control valve actuated laterally to open position by said cam in the resetting operation of said stem, a valve member having a vstem connected to said armature stem for sliding movement-relative thereto, and a spring interposed between said' cam' and said last valve member for actuating said valve and, when attracted, adapted to hold said valve open and, when retracted, compelling closing of said valve, a second valve, cam means operated by movement of said armature relative to said first valve -for opening said 'second valve, and a spring interposed between lsaid rst valve and said cam means for closing said first valve and moving said armature to retracted position.

9. In a device of the class described, in combination, a valve, an electromagnet, an armature connected for relative movement to said valve and, when attracted, adapted to hold said valve open and, when retracted, compelling closing of said valve, a second valve, cam means operated by movement of 'said armature relative to said first valve for opening said second valve, and a spring interposed between said iirst valve andl said cam means for closing said first valve and moving said armatureto retracted position, said spring also adapted to move said cam means from the position in which it lactuates said second valve. v l

10. In a. device of the class described, in combination, an armature, a valve connected for relative movement to said armature, an electromagnet movable into engagement with said armature to attract and hold said armature in attracted, position and also movable in a direction to actuate said valve to open position, a second valve, and means for opening said second valve by continued movement of said electromagnet in the direction in `which it is moved to attract and hold said armature and after said electromagnet is engaged with said armature.

11. In a. device of the class described, in combination, an amature, a valve connected for relative movement to said armature, an electromagnet movable into engagement with said armature to attract and hold saidarmature in attractedposition and also movable in a. direction to actuate said valve to open position, a second valve, means for opening said second -valve by continued movement of saidl electromagnet in the direction in which it vis moved to attract and hold said armature and after said electromagnet is engaged withv said armature, and means for releasing said last means and for closing said first valve `and moving said armature to retracted position;

12. yIn a device of the class described, in comattracted and retracted positions. an armature stem connected to said armature with its inner end extending into the body, a main valve connected to said armature stem for sliding movef ment relative thereto, and a pilot valve actuated by inward movement of said armature steml relative to said main valve. 1

13. In a device oi' the class described, in combination, a body, a hood having the interior thereof sealed from the interior of said body, -a stem extending from said hood, an electromagnet ldisposed within said hood and carried by said stem for movement to outwardly and inwardly projected positions therewith, an armature also disposed within said hood and having attracted and retracted positions, an armature stem connected to said armature, .a first member con-A nected `to said armature stem for sliding moveposition and, whenvretracted, releasing said-firstvalve member for movement to closed pOsition, and a second valve member adapted for operation to open position by movement of said armature relative to said iirst valve member.

15. In a device of lthe class described, in coni-A bination, electromagnet means, armature means for said electromagnet means, a iirst valve member adapted to be held in operating position by one of said rst means when same is attracted and having movement relative to said means. and operable to closed position upon retraction of said means, and a second valve member adapted for operation to open position by movement of the one of said rst means whichis adapted to hold said rst valve member in openposition.

16. In combination, a valve seat, a valve membei' cooperable with saidlvalve seat, an armature having lost motion connection with said valve member, and an electromagnet normally suiciently removed from the armature as to prevent the amature being attracted when the electromagnet is energized and mounted for movement relative to said amature and movable into cooperation with the armature to pick up the armature and in a direction away from the valve seat to move said armature with said electromagnet| said lost motion connection comprising means carried by the armature and engageable with means carried by said valve member for Vmoving 4'said valve member to open position by the movement of said armature away from the valve seat.

17. In combination, a valve seat, a valve member cooperable withsaid valve seat, an armature having lost motion connection with said valve member, an electromagnet normally sufciently removed from the armature as to prevent the armature being attracted when the electromagnet is energized and mounted for movement relative to said armature and movable intocooperation with the armature to pick up the armature and in a direction away from the valve seat to move said armature with said electromagnet, said lost motion connection comprising means carried by the armature and engageable with means carried by said valve member for moving said valve member to open position by the movement of said armature away from the valve seat. andv means operable by relative movementA of the lost motion connection between said armature and said valve member.

HAROLD a. MANTZ.

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