US3233830A

US3233830A - Burner valve construction

Info

Publication number: US3233830A
Application number: US202789A
Authority: US
Inventors: Branson Charles David; Willson James Robert; Malcom Arthur Harry
Original assignee: Robertshaw Controls Co
Current assignee: Robertshaw Controls Co
Priority date: 1962-06-15
Filing date: 1962-06-15
Publication date: 1966-02-08
Anticipated expiration: 1983-02-08
Also published as: GB987364A

Description

Feb- 8, 1966 c. D. BRANSON ETAL 3,233,830

BURNER VALVE CONSTRUCTION N 1 lw www .t NSC e ALL e RLA h SBWM q H R Y U mw? N EDH Dn WNBA O h V OH T S NSRR M 3 lm SU RCI-H Mmm CJA Feb- 8, 1956 c. D. BRANSON ETAL 3,233,830

BURNER VALVE CONSTRUCTION Filed June l5, 1962 3 Sheets-Sheet 2 AMES R RT w|LLsoN F |G"2 RTHUR (EERRY MALCOM www ATTORNEY Feb- 8, 1966 c. D. BRANSON ETAL 3,233,830

BURNER VALVE CONSTRUCTION Filed June 15, 1962 5 Sheets-Sheet 3 |36 |50 |84 |60 |56 |52 INVENTORS CHARLES DAVID BRANSON FIG-5 JAMES ROBERT w|LLsoN ARTHUR HARRY MALCOM BY @Ml/Mw ATTORNEY United States Patent O f' 3,233,830 BURNER VALVE CONSTRUCTION Charles David Branson, James Robert Willson, and

Arthur Harry Malcom, Greensburg, Pa., assignors to Robertsllaw Controls Company, Richmond, Va., a corporation of Delaware Fiied June 15, 1962, Ser. No. 202,789

7 Claims. (Cl. 236-99) This invention relates to an improved burner valve construction.

A feature of this invention provides a burner valve construction in which the closing spring action on the valve increases in strength as the valve moves toward its valve seat and decreases in strength as such valve moves away from its valve seat.

Another feature of this invention provides a substantially snap-action by the combined action of a local vaporizing thermostatic action in a liquid line to a thermostatic motor in combination with a spring action on the valve which increases in strength as the valve closes and the thermostatic vapor condenses7 and which spring action decreases in strength as said portion of thermostatic liquid vaporizes to receive a quick yielding impulse to open said valve as the liquid vaporizes.

Another feature of this invention provides a lever and spring construction acting on a valve in a manner to apply an increasing valve closing torque as the valve moves toward its valve seat and vice-versa.

Another object of this invention is to provide a burner valve construction having one or more of the features herein disclosed.

Another object of this invention is to provide a system for burner operation having one or more of the features herein disclosed.

Other objects are apparent from this description and the accompanying drawings in which:

FIGURE 1 is a diagrammatic representation of a burner system embodying this invention.

FIGURE 2 is a diagrammatic representation, on enlarged scale, of a part of the main gas burner, the pilot burner, the burner gas valve, and the thermostatic control for the gas valve.

FIGURE 3 is a perspective View of the needle construction for the discharge conduit of the burner gas valve.

FIGURE 4 is an enlarged longitudinal vertical cross section of the pilot burner construction.

FIGURE 5 is a view of a portion of FIGURE 2 with the valve in open position.

FIGURE 6 is an end view of the main gas burner and pilot burner.

FIGURE 7 is an enlarged cross section of the valve actuating means shown in FIGURE 2 taken from the opposite side.

FIGURE 8 is a top view of the valve actuating lever.

FIGURE 9 is a top view of the supporting fulcrum lever.

FIGURE 10 is au enlarged view of the fulcrum construction.

Certain words indicating direction, relative position, etc. are used in this application for the sake of brevity and clearness. However, such words are not intended as limitations and apply only to the illustrations in the drawings. The actual constructions used may have different directions, relative positions, et-c. Words such as vertical, horizontaL upper, lower, etc. are types of words which are used in this manner.

Referring first to FIGURE 1, an oven may be provided with a main gas burner 22, a pilot construction 24, a main burner gas valve construction 26, a gas supply pipe 2S. A thermostatic control c-onstruction 30 may Patented Feb. 8, 1966 have a thermostatic bulb 32 in the oven 2) which causes said thermostatic control construction 3i) to control the heating action of the burner 22 to produce desire-d temperatures in the oven 20. A main gas valve 33 may control the flow of gas to the system shown in FIGURE 1.

The pilot construction 24 may be of a character such that it produces a stand-by pilot flame 34, FIGURE 4, incapable of igniting the burner 22, and an igniting iiame 36 capable of igniting the burner 22.

The stand-by pilot flame 34 is incapable of heating the thermostatic bulb 35 sutiiciently to cause such bulb 35 to cause gas to be supplied to the main burner 22 by the gas valve 26. The flame 36 is of such size, or construction, or shape, that it is capable of heating the thermostatic bulb 35 to cause gas to be supplied to the burner 22 by the valve 26 so the burner may be ignited by the igniting llame 36.

The pilot construction 24 may include a nozzle 38, which receives gas from the pipe 40 and discharges it through an orifice 42 in sutiicient quantity to produce the stand-by flame 34 under one type of control, and to produce the igniting flame 36 under a diiferent type of control.

The gas is discharged from the orifice 42 as a jet 44 which entrains a quantity of atmospheric air entering through one or more oriiices 46 in the side of connector 48.

When the stand-by arne 34 is to be produced, the gas entering the nozzle 38 is of limited quantity and pressure so that only a small amount of gas and air are fed to the shield 50. The shield 50 may be inverted channel-shaped in cross section, and may have a downwardly open elbow 52 which guides the gas and air mixture to the first pilot burner aperture 54 through which the limited amount of gas and air pass and form the stand-by pilot iiame 34. The aperture 54 may be provided with a small hood S6 which aids in controlling the formation of the llame 34.

The stand-by Calibrating valve 58, FIGURE 1 may be adjusted so that the standby pilot iiame 34 is a small blue flame, and the small blue flame is the calibration indicator to show that the pilot flame has been adjusted to the desired size.

The production of the standby pilot flame on top of the shield 50 prevents undesired heating of the thermostatic bulb 35 during the standby conditions.

The hood 50 has a downwardly slanting channel 60 with an open end 62 and one or more additional small hoods 64, and igniting flame apertures 65. The construction is such that when a larger quantity of gas is fed through the nozzle 38, by the thermostat construction 30, then the igniting llame 36 is produced, which burns at 36, 36A and 36B as gas and air mixture are fed under the small hood or hoods 64, and out of the end 62, and these igniting flame portions are suiiiciently high to ignite the burner gas which is discharged through the burner orifices 66. It desired, the orifices 66 may be slightly downwardly slanted along the side 68 of the burner. The end 7 0 of the burner 22 may also be provided with orifices 66 which carry the ignition to the other similar side 68A of the burner.

The igniting flame 36 burns at 36B, under the end of the hood 50, so that the iiame 36B heats the bulb 35 either by direct Contact, or because of close proximity, so that a portion of the liquid mercury, or other thermostatic liuid in the bulb 35, has its liquid phase changed to a gaseous phase to produce a quickly increasing thermostatic fluid pressure in the thermostatic fluid enclosure of which the bulb 35 is a part. The 4tube 72 and thermostatic motor 74 form the remainder of the therm-ostatic iiuid enclosure.

When the

igniting flame

36, 36A and 36B ceases to be produced, the channel-shaped shield or hood promotes the upward flow of cooling air' in contact with 4the thermostatic bulb 35 to cause quick cooling action of the bulb 35, The notches 51 at the elbow 50 promote this cooling action.

The bulb 35 is connected by a tube 72, which forms a part of the thermostatic fluid enclosure, and which is connected to the thermostatic motor 74, in the burner gas valve construction 26, to cause burner gas to be supplied by the burner gas valve construction 26 to the burner 22 in response to temperatures produced by the burner 22, as elsewhere further described. The size of the

igniting flame

36, 36A and 36B may be regulated -by an igniting flame regulating valve 76, FIGURE l.

The construction is such that when the temperature in the oven 20, as produced by the burner 22, is below a selec-ted level, the thermostatic bulb 32 causes the thermostatic construction 30 to feed an igniting ame producing amount of gas through the igniting gas pipe 78, FIGURE l. The pipe 78 is connected to the pilot burner pipe 40. This causes the large

igniting arne

36, 36A and 36B to be produced in the pilot construction 24. This heats the pilot thermostat bulb 35, which in turn actuates or expands the thermostatic motor 74 and causes burner gas to be fed by the burner gas valve construction 26 to the burner 22.

This heats the oven 20 until the temperature in the oven 20 reaches the desired maximum, at which time the thermostatic bulb 32 causes pilot gas to cease to be fed through the pipe 78, which in turn causes the

igniting pilot flame

36, 36A and 36B to cease to be produced. This permits the pilot bulb 35 to cool and thereby restore the thermostatic fluid to the liquid phase throughout the fluid enclosure, and to cause the burner gas valve construction 26 to cease feeding burner gas to the burner 22.

The thermostatic motor 74 may include a pair of telescoped resilient cup-

shaped diaphragms

75A and 75B, which are sealed together at the flanges 75C to form an expandable diaphragm for thermostatic motor 74 into which the liquid mercury is forced when the mercury in bulb 35 is vaporized.

A suitable bracket construction 80, of any desired shape, may be provided to hold the hood 50, the nozzle construction 49 which holds nozzle 38, and the bulb 35 adjacent to the burner 22. If desired, this bracket construction 80 may be secured by the flange 82 to the top -of the burner by one or more screws 84.

The thermostatic control construction 30, FIGURE 1, may be of any suitable character capable of controlling the ow of igniting burner gas through the pipe 78 in response to the temperatures registered by the thermostatic bulb 32. A suitable knob 86 may be included, which Vadjusts the thermostat valve construction 88, so the construction 88 causes gas to be fed from the pipe 90 and gas supply 28, through the regulating valve 76 and pipe 78 to the pipe 40 and nozzle 38.

Standby pilot gas may be fed through standby pipes 92. and 94, and the standby llame regulating valve 58, to the pipe 40 and from thence to the nozzle 38. The regulating valve 58 may be supported on the thermostat casing 96, or the pipes 92 and 94, and valve 58 may be entirely separate and independent from the casing 96, as desired.

The thermostat control construction may feed standby gas continuously through the

pipes

92, 94 and 40, as regulated by an adjustable orifice valve 58, so the standby flam'e 34 only is formed when 11o gas is fed through the pipes 90 and 78 when the thermostat valve 8S is closed by bulb 32 when the oven 20 is sufliciently warm. However, when the oven cools below a desired level, the bulb 32 opens the valve 88 and feeds a larger amount of gas through

pipes

96, 78 and 40, and regulating valve 78 to produce the igniting

ame

36, 36A and 36B.

The burner gas valve construction 26 may have a burner gas discharge connection 100, `which has an adjustable orice 102, which discharges the burner gas in the form of a jet stream past the well known gas and air mixing construction 104. The rate of discharge at the orice 102 may be regulated by turning the gas connector 100, to cause the threaded construction 101 to regulate the jet 102, as desired.

The burner gas valve construction 26 may have a discharge valve seat connected in gas flow relationship to the burner 22, as by the connector 110, which discharges into the nozzle construction 100.

The jet construction may include a lower passageway 109A which is threaded on the upper portion 101 of connector 110 and is adjustable up and down by said threaded construction.

A jet piece 100B has a larger bore 100C and the mini'- mum iiow passage 100D. The Upper end 100B of construction 100 has an internal conical bore 103013 which may seal against the upper conical end 100G to force all the gas through passage 100D.

T-he conical bore 100H is tapered so it does not seat against the upper slanting ends 100] of wings 100K so a tight seal may be formed at 100F.

The wings 100K are driven in the bore 100L and against the shoulder 100M.

The construction 100 may be turned to its lowest position to produce a minimum discharge through passage 100D or construction 100 :may be adjusted upwardly by the threaded construction to produce a bypass between 100F and 100G soa llarger amount of gas may be fed to the mixer 104.

A valve 112 may seat ony the valve seat 108, and, if desired, may have a sealing disc 114 to engage .the seat 108 in effective sealing relationship. i

A guide pin 116 may have a head 118 to guide valve 112 through the medium of a cylindrical opening 120. The downward movement of the valve 112 may be limited by the end wall 122 of the opening 120 when the wall 122 engages the head 118. The pin 116 may be uted and driven into the cylindrical opening 124 of the elongated tubular valve casing 126, to the proper level properly to limit the downward movement of valve 112.

The thermostatic motor 74 may have means to move the valve 112 toward said valve seat 108 when the igniting

flame

36, 36A, 36B, or a similar ame, ceases to be produced. Such means may also move the valve 112 away from the valve seat 108 when such igniting

llame

36, 36A and 36B is produced. This action is indirectly in response to the control of the ignition gas by the thermostatic bulb 32 and thermostat 30 in response to the temperature in oven 20. The action maintains the temperature inthe oven 20, or other heated object, within selected temperature limits.

The means to move the valve 112 may include a spring construction or means 128, FIGURE 7, acting to aid in moving the valve 112 toward the valve seat 108', and increasing the valve seating strength as the valve 112 moves toward the valve seat 108 and decreases in strength as said valve 112 moves away from said valve seat 108.

The construction is such that the valve 112 is quickly opened when a portion of the mercury in bulb 35 is vaporized and is quickly closed when the vaporized portion is cooled and condensed. This quick opening and closing of valve 112 is in response to the existence or non-existence of

ignition ame

36, 36A, 36B, or similar control flame.

The thermostatic motor 74, tube 72 and bulb 35 form a thermostatic .fluid casing which is heated by the igniting

iiame

36, 36A, and 36B. A portion of the thermostatic fluid in the thermostatic casing, such as in bulb 35, may change phase when it is heated by said igniting flame 36B or similar flame. For example, the bulb 35'and the tube 72 and the thermostatic motor 74 may contain mercury in liquid form at normal atmospheric temperature, and the fluid casing so produced by these members may be charged with liquid mercury through the opening 13.0,

FIGURE 7, after which the ball 132 may be welded to the opening 130, on the motor head 134, which is secured to the diaphragm 75B.

A suitable wire 136 may be placed in the tube 72 to reduce the amount of mercury used in the tube 72, and may be chosen of such material, that it may compensate for the expansion and contraction of the tube 72 and liquid mercury due to surrounding temperatures, so such atmospheric temperature changes, and other temperatures which do not vaporize mercury (below 700 F. more or less) do not affect the valve 112.

v The portion of the thermostatic fluid, or mercury, which is in the bulb 35 may change phase. For example, the liquid mercury in bulb 35 may be vaporized at temperatures of 700 F., more or less, and the production of this vapor causes a quick and elastic movement of the ball 132 to .produce an action which approaches a snap-acting opening and closing of the valve 112, depending upon the change from liquid mercury to mercury vapor and vice-versa.

The valve moving means or spring construction 128 may include a valve actuating lever 136 having a lever fulcrum 138 and a valve actuating portion 140, which are separated from each other. The thermostatic motor 74 has means, such as the ball 132, to move the lever 136 and valve 112 toward and away from the valve seat 108.

yThe spring construction l128, may include a relatively Estrong compression spring 142 lwhich cooperates with the -lever 136 to move the valve 112 toward the seat 108.

Thespring construction 128, which may include the relativelyifstrong spring 142, with or without an additional relatively weak compression spring 144, cooperates wit-h the lever 136 to move the valve 112 toward the seat 108. The spring` construction 128 increases in valve seating strength-as the valve 112 moves toward the valve seat 108. and decreases in strength as the valve 112 moves away from the valve seat 108.

A lost motion notch 145 may be provided in valve 112 to vpermit the lever 136 to impart an additionally quick opening motion tothe valve 112 as the mercury starts to vaporize.

.A -supporting fulcrum 146 cooperates with the lever fulcrum 138 to hold the lever 136 in pivoting position. The lever fulcrum 138 may be .hook-shaped as at 148 and engages the knife edge of the stationary or supporting fulcrum'146. The compression spring 142 pulls the hook type fulcrum 138 tightly against the stationary or supporting fulcrum 146, in a rightward direction in FIG- URES 7 and l0.

The supporting fulcrum 146 may be adjustable up and down, for example, to adjust and calibrate the opening 150 which is adjustable to adjust the supporting fulcrum The lever'150 may be pivoted by hooks 152 inserted in openings 154 in the valve casing end wall 155. The lever 150 is adjustable by the pin 156, which may be longitudinally adjusted, as by the threaded construction 158 which has a screw head 160, for longitudinal engagement.

A suitable Valve casing cover 157 may be bolted on the end wall 155 after the lever 150 has been positioned. The cover 157 may carry the thermostatic motor 74 so the ball 132 engages lever 136.

The compression spring 142 has a first spring part, such as one end 161 which engages the lever 136, through the medium of a disc 162 which engages the lever 136 at a first spring fulcrum 164.

A second spring part 166, which may be the other end of the spring 142, may engage a second spring fulcrum 168, which is carried at the end of the lever 150.

The

spring fulcrums

164 and 168 are so located to produce a valve closing torque, as indicated by the dotted Iline in FIGURE 7, which extends from the

fulcrums

138 and 146 to the right'angled intersection 172 with the extended line 174 from the

spring fulcrums

164 and 168.

The first spring fulcrum 164 swings about the arc 176 which is centered about the

fulcrums

138 and 146. The fulcrum 168 is stationary during the operation of the device and is movable only for adjustment purposes. Therefore, the extension line 174 moves toward the

ulcrums

138 and 146 as indicated at 174A as the valve 112 moves away from the valve seat 108. Hence the intersection 172 likewise moves towards the

fulcrums

138 and 146, as indicated at 172A as the valve 112 moves away from the valve seat 108. The line 170 is indicative of the torque produced by the rightward pull of the line 174 (in FIGURE 7) due to the compression spring 142. It produces a counter-clockwise torque about the

fulcrums

138 and 146 which increases in length and strength as valve 112 moves toward the seat 108, and decreases in length and strength as the Valve 112 moves away from the valve seat 108.

This increase in spring torque 170 as the valve 112 moves toward the valve seat 108 causes a quick closing movement of the valve. Conversely, the decrease in spring torque 170 as the valve moves away from the valve seat 108 causes the Vvalve 112 to have a quick opening movement. This action is amplified by the resiliency of the mercury vapor in bulb 135.

The supporting fulcrum 168 cooperates with the adjacent spring fulcrum and is adjustable by the pin 156 to calibrate the action of valve 112. The fulcrum 168 is carried by the lever 15), which is adjustable by the pin 156 about the fulcrums 152 to adjust the supporting fulcrum 168.

The lever 50 is held in locked position by the thrust of the ball 132, the openings 154, and the pin 156.

The lever 150 may be adjusted by the pin 156 to cause any relative movement between the line 174 `and the

fulcrums

138 and 146. ForA example, it may be preferred to cause the extension line 174 to be at, or just slightly below the

fulcrums

138 and 170 when the valve 112 is in the downward fully opened positiony 112A, and to be a relatively long distance, such as at 172, when the valve 112 is in the fully closed `and full line position illustrated in FIGURE7.

The lever 136 may be made of a stamping, such as shown in FIGUREk 8. The lever 136 has extension shoulders which carry a pair of hook fulcrums 138, which act in unison against the pair of knife fulcrums 146, shown in FIGURE 9. FIGURE 9 shows the lever 150 to be a relatively at piece of metal with shoulders or hooks 152 carried by an extension 182. The spring supporting fulcrum 168 is'shown at the right end of FIG- URE 9. A downward extension 184 is punched into the lever 150 to engageV the pin 156. A strengthening ridge 186 is formed to make the lever 150 rigid.

If desired, the spring 142 may have a spring strength of 6 pounds, more or less at its normal load.` The spring 144 may be relatively weak, and may have a spring strength of 1.5 ounces, more or less,when at its normal load. The spring 142 therefore provides a ve'ry substantialupward push on the valve 112 when the valve closes. It is strongest in valve closing strength or torque when valve 112 is in the fuily closed position as shown in full lines in FIGURE 7 and has a small valve closing torque when the valve 112 is open.

The parts which contact the mercury, if used, may be made of material which is not affected by the mercury. For example, the bulb 35, tube 72, Wire 136 and the mercury contacting parts of motor '74 may be made of stainless steel, or the like.

It is thus to be seen that this invention provides new and useful pilot constructions, burner gas valve constructions, and combinations thereof. Also new and useful methods of control are provided.

In the fully closed position of the valve 112, and in the fully retracted position of the ball 132, not shown, the Iball 132 is slightly spaced from the lever 13.6 to permit the full closing force of the spring 142 to act on the valve 112.

The dotted line position of lever 136 in FIGURE 7 is not its lowest position when the valve 112 is fully opened. Such lowest position is below the dotted line showing. Also the line 174 approaches the

fulcrums

138 and 146 to a position closer than 172A when the valve 112 is in fully open position. Hence the counterclockwise torque of lever 136 is less than the torque at 172A when valve 112 is in fully open position.

While the form of the invention now preferred has been disclosed as required by statute, other forms may be used, all coming within the scope of the claims which follow.

What is claimed is:

1. A burner gas valve construction controlling the flow of burner gas for a burner comprising: an elongated tubular valve casing with a gas inlet at a first valve casing end, with a thermostatic motor receiving opening at a second valve casing end, and with a gas burner connector receiving opening in said casing intermediate said casing ends; a valve guide pin insertable in said valve casing in alignment with said connector receiving opening; a burner gas valve slidably carried by said guide pin and having a lever receiving lost motion notch; a gas burner connector inserted in said connector receiving opening and having a valve seat opened and closed byY said burner gas valve; a valve actuating lever in said casing with one lever end portion engaging said lost motion notch, With the other lever end portion having a valve lever fulcrurn adjacent said motor receiving opening and with an intermediate lever portion having a movable spring fulcrum; a fulcrum lever in said casing having a normally stationary lever supporting fulcrum engaging said valve lever 'fulcrum adjacent said motor receiving opening, having a hook construction at one end engaging a hook receiving construction at said second valve casing end and having a normally stationary spring fulcrum at the other end; a compression spring means having end portions respectively engaging said spring lever fulcrum and said stationary spring fulcrum; an end cover removably secured to said second valve casing end and covering said motor receiving opening; and a thermostatic motor carried by said cover and engaging said valve actuating lever to operate said valve actuating lever in combination with said spring means to move said valve toward and away from said valve seat.

2. A valve construction according to claim 1 in which a spring means is provided around said guide pin between said valve and said casing which is relatively weaker than said `first named spring means.

3. A valve construction according to claim 1 in which a calibration pin is provided in said casing and movably actuating said fulcrum lever to adjust said normally stationary lever supporting fulcrum.

4. A valve construction according to claim 1 in which said connector receiving opening is transversely larger than said valve and guide pin.

5. A valve construction according to claim 1 in which said thermostatic motor includes a pair of telescoped resilient cup-shaped diaphragms sealed together and connected to a tube which forms part of a thermostatic fluid enclosure, said diaphragms having openings aligned With said tube and closed by a motor head having an opening closed by a ball which contacts and moves said valve actuating lever.

6. A valve construction according to claim 1 in which said valve has a cylindrical opening, receiving said guide pin, said cylindrical opening having an end wall which engages the end of said guide pin and limits the opening movement of said valve.

7. A burner gas valve construction controlling the flow of burner gas for a burner comprising: an elongated tubular valve casing having a gas inlet at a rst casing end, a thermostatic motor receiving opening at a second casing end, and a gas burner connector receiving opening in said casing intermediate said ends; a valve guide pin inserted in an opening in the wall of said casing opposite said connector receiving opening; a gas burner connector inserted in said connector receiving opening and having a valve seat aligned with said guide pin; a burner gas valve having an axial opening slidably receiving said guideV pin, having a sealing disc opening and closing said valve seat, and having an intermediate lever receiving lost motion notch; a valve actuating lever in said casing with one end portion engaging said lost motion notch, with the other end portion having a valve lever fulcrum adjacent said motor receiving opening, and with an intermediate movable spring fulcrum; a fulcrum lever in said casing having a normally stationary lever supporting fulcrum engaging said lever fulcrum and having a hook construction at one end held in said casing adjacent said second casing end, and having a normally stationary spring fulcrum at the other end; compression spring means having end portions respectively engaging said spring lever fulcrum and said stationary spring fulcrum, and a casing cover removably secured to and covering said opening at said second casing end; and a thermostatic motor carried by said cover and engaging said valve actuating lever to operate said spring construction and said valve to open and close said valve seat with spring strength whichV increases as said valve closes and decreases as said valve opens.

References Cited by the Examiner UNITED STATES PATENTS 1,112,862 10/1914 Spahr et al. 158-118 2,025,413 12/1935 Hegwein et al 23.6-68 X 2,065,481 12/1936 Thulman.

2,553,575 5/1'951 Grayson 236-68 2,583,795 1/1952 Pawelsky et al. 236-48 2,631,659 3/1953 Wright 158-118 2,664,246 12/1953 Ray 236-99 2,874,924 2/1959 Good 236-,48 X 2,906,460 9/1959 Daly 236-48 2,918,119 12/1959 Alger 158-115 2,941,588 6/1960 Blanz'y 158-115 2,967,022 1/1961 Wood et al. 239-99 3,069,089 12/1962 Demi 236-99 3,090,561 5/1963 Holzboog et al. 2361-68 3,091,395 5/1963 Douglas 236-68 3,132,803 5/1964 Wantz et al. 236-68 FOREIGN PATENTS 1,235,208 5/ 1960 France.

EDWARD I. MICHAEL, Primary Examiner.

PERCY L. PATRICK, Examiner.

Claims

1. A BURNER GAS VALVE CONSTRUCTION CONTROLLING THE FLOW OF BURNER GAS FOR A BURNER COMPRISING: AN ELONGATED TUBULAR VALVE CASING WITH A GAS INLET AT A FIRST VALVE CASING END, WITH A THERMOSTATIC MOTOR RECEIVING OPENING AT A SECOND VALVE CASING END, AND WITH A GAS BURNER CONNECTOR RECEIVING OPENING IN SAID CASING INTERMEDIATE SAID CASING ENDS; A VALVE GUIDE PIN INSERTABLE IN SAID VALVE CASING IN ALIGNMENT WITH SAID CONNECTOR RECEIVING OPENING; A BURNER GAS VALVE SLIDABLY CARRIED BY SAID GUIDE PIN AND HAVING A LEVER RECEIVING LOST MOTION NOTCH; A GAS BURNER CONNECTOR INSERTED IN SAID CONNECTOR RECEIVING OPENING AND HAVING A VALVE SEAT OPENED AND CLOSED BY SAID BURNER GAS VALVE; A VALVE ACTUATING LEVER IN SAID CASING WITH ONE LEVER END PORTION ENGAGING SAID LOST MOTION NOTCH, WITH THE OTHER LEVER END PORTION HAVING A VALVE LEVER FULCRUM ADJACENT SAID MOTOR RECEIVING OPENING AND WITH AN INTERMEDIATE LEVER PORTION HAVING A MOVABLE SPRING FULCRUM; A FULCRUM LEVER IN SAID CASING HAVING A NORMALLY STATIONARY LEVER SUPPORTING FULCRUM ENGAGING SAID VALVE LEVER FULCRUM ADJACENT SAID MOTOR RECEIVING OPENING, HAVING A HOOK CONSTRUCTION AT ONE END ENGAGING A HOOK RECEIVING CONSTRUCTION AT SAID SECOND VALVE CASING END AND HAVING A NORMALLY STATIONARY SPRING FULCRUM AT THE OTHER END; A COMPRESSION SPRING MEANS HAVING END PORTIONS RESPECTIVELY ENGAGING SAID SPRING LEVER FULCRUM AND SAID STATIONARY SPRING FULCRUM; AN END COVER REMOVABLY SECURED TO SAID SECOND VALVE CASING END AND COVERING SAID MOTOR RECEIVING OPENING; AND A THERMOSTATIC MOTOR CARRIED BY SAID COVER AND ENGAGING SAID VALVE ACTUATING LEVER TO OPERATE SAID VALVE ACTUATING LEVER IN COMBINATION WITH SAID SPRING MEANS TO MOVE SAID VALVE TOWARD AND AWAY FROM SAID VALVE SEAT.