US2105453A - Valve for heating apparatus - Google Patents

Description

Jan. 11, 1938. w, E T' 2,105,453

VALVE FOR HEATING APPARATUS Filed April 27, 193:5 5 Sheets-Sheet 1 Nil Jan. 11, 1938.

L. W. EGGLESTON VALVE FOR HEATING APPARATUS Filed April 27, 1935 3 Sheets-Sheet 2 Jan. .11, 1938. L, w EGGLESTQN 2,105,453

VALVE FOR HEATING APPARATUS Filed April 27, 1933 3 Sheets-Sheet 5 49 4 6| 28 \y 2 65 J1/ /x' 64- 5b 52 65 54' 42 6'7 L 55 5 76 5O 74 I 5589 36 B280 85 I 5 33 4 1 3?. a4

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l I I I 5| gr r 5-1- w 4-5 lli') 58 in 6O 5o Patented Jan. 11, 1938 UNITED STATES 2,105,453 VALVE FOR HEATING APPARATUS Lewis W. Eggleston, Detroit, Mich., assignor to Detroit Lubricator Company, Detroit, Mich., a

corporation of Michiga Application April 27, 1933, Serial No. 668,177

v Claims.

Myinvention relates to new and useful improvements in heating apparatus, and more particularly to an apparatus or system for controlling flow of fluid fuel to a heating burner.

An object of my invention is to provide a system in which the heating burner is controlled through the medium of a controlling pilot burner.

Another object is to provide in such a system or apparatus means for igniting the controlling pilot burner.

Another object is to provide a novel valve for controlling flow of fuel to the heating burner.

The invention consists in the improved construction and combination of parts, to be more fully described hereinafter and the novelty of which 'will be particularly pointed out and dis tinctly claimed.

In the accompanying drawings, to be taken as a part of this specification, I have fully and clearly illustrated a preferred embodiment of my invention, in which drawings- Figure 1 is a view in front elevation of a burner controlling apparatus embodying my invention;

Fig. 2 is a view of the apparatus in side elevation, having certain parts broken away;

Fig. 3 is an enlarged detail view in section on the line 3-3 of Figure 1;

Fi 4 is a view in section on the line 4-4 of Fig. 3, and

Fig. 5 is a detail view in section on the'line 5-5 of Fig. 4.

Referring to the drawings by characters of reference, I designates generally a supporting a framework having a vertical frame member or upright 2 to which is adjustably secured a forwardly extending bracket member 3. A main fuel supply conduit or pipe 4 is supported by the member 3 and preferably seats in -a recess 5 formed in the top face thereof. The main pipe 4 has a branch pipe or riser 6 communicating therewith and supported thereby. The branch pipe 6 supports a valve 1 which controls flow of fuel from the pipes 4 and 6 to a main heating burner 8. A

pilot burner 91s positioned adjacent the main burner 8 and serves to ignite the same. Thisv pllot burner 9 is supplied with fuel by means of a pipe line or conduit In which is supported, as at III, by a horizontal laterally extending frame member ll having a flange Il secured to the upper end of the upright 2. The conduit l0 terminates at the pipe 6 and has its end secured and sealed in an outlet port l2 in the pipe 6. The conduit to is preferably provided with a. control valve I: for regulating the size of the pilot flame at the burner .9. The frame member 2 has a laterally extending supporting arm l4 which lies beneath the frame member H and to which a supply pipe I6 is rigidly secured, preferably by lugs or ears i6 rigid with the pipe I5 and fastened to the arm M by screws IT, or the like. The pipe I5 is supplied with fuel from a conduit l5 and is branched at its upper end to provide substantiallyparallel terminal end portions l8, [9, with the portion l8 overlying the portion i 9. The portion I 8 supports a controlling pilot burner which is supplied with fuel therefrom by the pipe I 5. Extending from the portion l9 and supported thereby, there is an upwardly inclined igniter tube 2| which lies beneath the pilot burner 28 and which terminates at its upper end closely adjacent to the pilot burner 9. The upper end of the tube 2| is closed and sealed by a plug 22, and in the top face of the tube 2! there is a longitudinally extending series of burner ports 23. These ports are closely adjacent to one another and extend from the burner 9 to the burner 20. Flow of fuel through the pipe l5 to the pilot burner 20 and the-igniter tube 2| is controlled by a valve 24 in the conduit I5 The valve is preferably electrically operated and of the solenoid type having its coil supplied with current by the lead wires 25, 26. Operation of the valve- 24 is preferably controlled by a thermostatic switch 21 which may be of any desired construction inserted in the lead wire 25 in series circuit open side which is closed and sealed by a plate' member 33 secured'to the casing by screws 34. A gasket, or the like, 35 may be provided to seal the joint between the plate member 33 and the casing 28. Projecting from the outside face of the plate member 33 there is an elongated tubular outlet member 36 having a longitudinal openended bore 31 therethrough which opens at its inner end through an outlet port or aperture in the plate member 33 into the chamber 29. The outlet member 36' extends into the bore of a sleeve member 38 carried by the inlet end of the mixing tube 39 of the main burner 8. The mixing tube 39 is provided with air inlet ports 40 which are controlled by a valve plate 4| adjustably screw-threaded upon the sleeve member 38.

- The free end of the outlet member 36 is provided with a ported plug 42 having a nozzle aperture 43 therethrough for discharging the gas or sion'between the nut member 52 and the head of thepin 54. The pin 54 projects through an aperture in the nut member 52 and is rigidly fixed, as at 55, to the lever 59. Adjacent its other end the lever 59 has substantially parallel opposed flanges 51 projecting from the side edges of the lever and toward the plate member 33. The flanges 51 are provided with aligned apertures to receive the end portions of a supporting shaft 58 which-is mounted in substantially parallel spaced lugs or ears 59 projecting from the inside face of the plate member 33 and positioned between the flanges 51. The shaft 58 serves as a fulcrum for the lever 59 so that the valve member 49 is pivotally supported for movement toward and from its seat. The valve member 49 is normally urged toward closed position by aspring 59 which is coiled about the shaft 58 between the lugs 59 and which has its end portions engaging the inside face of the plate member 33 and the underside of the lever 59 on the opposite side of the lever fulcrum from the valve member 49.

Through the wall of the casing 28 there is an internally threaded bore 5| positioned above the chamber 39 and opening into the chamber 29, being preferably aligned with the bore of the outlet member 35. Adjustably screw-threaded in the bore 5| there is a stem 52 having its ends projecting from the bore. On the end of the stem within the chamber 29 there is a head portion 53 cooperable with the lever 59 and-servin as a stop or abutment member to limit opening movement of the valve member 49. The bore 5| is sealed around the stem 52 by packing material 54 held under compression by a packing nut or sleeve '55 screw -threaded in the. outer end of the bore 5|. It may be noted that the stem 52 may be screwed inwardly so that. the head portion 53 will engage the lever 59 and hold the valve member to; its seat to prevent flow through thecasing.

The chamber'39 has an open side which is closed and sealed by a. plate member 55 which is substantially parallel to the plate member 33 and which is secured to the'casing by screws 51. Within the chamber 39 there is an 'expansiblecollapsible pressure responsive chamber 58 preferably formed by a substantially cylindrical metal bellows 59' having one end secured and sealed,

'as at I9, in an annular groove or recess formed in the inside facebf the plate member 55. The other end of the bellows is closed and sealed by a head member or end wall II having a reentrant portion I2 which extends into the chamber 58 and cooperates with the plate member 55 to limit collapseof the bellows 59. The head member I| rigidly supportsa plunger oroperating'member I3 which is preferably screw-threaded or. otherwisesecured in a substantially cylindrical recess 14 in the member II and portion I2. Adjustably screw-threaded on the plunger member 13 there is an abutment member I5 preferablyin the form of a sleeve having an annular flange against which is seated one end of a coil spring I5. The spring I5 surrounds the plunger member I3 and at its other end engages a packing disc or ring 11 seating on the wall 3|. In the wall 3| there is an annular packing material recess I8 which opens into the chamber 39 and which surrounds the free end of the plunger member I3. The recess I8 contains suitable packing material which serves to seal the aperture 32 around the plunger I3 and which is held in the recess and under compression by the packing ring ll and the spring I5. The plunger member 13 has a longitudinal bore I9 in which an operating member 89 is reciprocably mounted. The member 89 projects from the end of the plunger member I3 and is normally held in its outward or extended position by a resilient cushioning spring 8| positioned in the bore I9. Outward movement of the member 89 is limited by a head portion 82 cooperating with an annular shoulder in the bore I9. The member 89 extends into the chamber 29 for cooperation with the lever 59 and is operable upon expansion of the chamber 58 to engage the lever 59 on the opposite side of shaft,

58 from the valve member 49. The member 99 is preferably provided with a conical end portion adapted to seat in a'conical recess 83 formed in the lever 59. Through the plate member 55 there is a passage 84 which opens at one end into the chamber 58 and which at its other end opens into a passage 85 in a boss 85 projecting from the plate member 55. The passage 85 connects to a tube '81 which extends to the controlling pilot burner 29. The free end portion of the tube 81 serves as a bulb element, preferably being wrapped or coiled, as at 88, around the burner 29 and is secured in position by a clamp 89. The tube 81 and chamber 58 comprise a power-means or thermostat and are charged with a. suitable volatile liquid which will expand and contract in response to change of temperature. tube and'cliamber have been charged, the end of the tube 81 is closed and sealed, as at 99. The casing 28 has a depending tubular extension 9| which provides an inlet passage to the chamber 29. The extension 9| seats on and communicates with the branch pipe 5to which it is secured by a sleeve nut 92.

r The operation of my apparatus is as follows: The pilot burner 9 is ignited andthe size of the flame is regulated by the valve I3 so as to provide sumcient flame to ignite the main burn- I er8andthegasissuingfromtheports23 inthe issuing from the ports 23 in the igniter tube will be ignited adjacent the constantly burning pilot 9, and due to the close proximity of-the ports 23 the flame will carry down the tube 2| until the gas issuing from the ports 23 adjacent the burner 29 is-ignited, when the burner 29 will be ignited thereby. Ignition of the burner 29 will heat the volatile fluid in the coil or bulb 88 and create a pressure transmitted through the tube 81 into the chamber 58. The pressure. ;thus created in the chamber 58 wilhexpand the, bellows 59 against the foree of spring I5. As the plunger member I3 moves outwardand into the cham j ber 29, the operating member will engage the-' lever 59. Continued movement of the plunger member I3 as spring I5 collapses will rotate the lever 55 about the slntt 58,-overcoming the light to After the spring 60 and moving the valve member 49 toward open position. Opening of the valve member 49 will permit gas to flow through the valve 1 into the mixing tube 39 where the gas will be mixed with the proper proportion of air for burning at the main burner 8. The gas supplied to the main burner 8 will be ignited by the constantly' burning pilot burner 9. When the solenoid valve 24 is closed by breaking of the circuit at the thermostat 21, for example, the supply of gas to the controlling pilot burner 20 and the igniter tube 2| will be cut ofi. Extlnguishment of the pilot burner 20 will permit the coil or bulb 88 to cool and thereby relieve the pressure in the chamber 68 so that the spring 16 will retract the plunger member I3 and its operating member 80 from the lever 50 to permit the spring 60 to move the valve member 49 to closed position. The extent to which the valve member 49 can be opened may be regulated by the position of the head portion 63. If the valve member is limited in its opening movement by engagement of the lever 50 with the portion 63 before the chamber 68 has reached its limit of expansion, then the spring 8| will permit relative movement between the member 80 and the plunger member 13 so that the plunger member 13 can continue to move without injuring the parts of the valve.

What I claim and desire to secure by Letters Patent of the United States is:

1. In an apparatus of the character described, a hollow casing having a partition dividing said casing internally into a longitudinal chamber having relatively transversely directed inlet and outlet ports and a substantially cylindrical ,chamber positioned intermediate said inlet and outlet ports and with its longitudinal axis substantially parallel to the axis of said outlet, a valve member in said longitudinal chamber and cooperable with said outlet to control flow through said longitudinal chamber, a lever operatively connected to said valve member and extending longitudinally of said longitudinal chamber and into proximity to said outlet port, said partition having an aperture therethrough coaxial with said outlet and in overlying relation to the end of said lever, a plate member closing and sealing said other chamber and having pressure responsive means sealed thereto, a plunger extending through said aperture and operable to transmit movement from said responsive means to said lever, and a coil spring surrounding said plunger, said spring abutting said partition and resisting movement of said responsive means whereby to regulate the operation of said valve member.

2. In an apparatus of the character described, a hollow casing containing a partition dividing said casing internally into separate chambers having oppositely directed open sides, one of said chambers having an inlet opening through a side wall thereof, a plate member closing and sealing the open side of said one chamber and having an outlet aperture, a valve member in said one chamber controlling flow through said aperture, a lever supported by said plate member and operatively connected to said valve member, said partition having an aperture connecting said chambers, a closure member for the open side of said other chamber, pressure responsive means in the other of said chambers and carried by said closure member, a plunger having a lost-motion means reciprocably supported in and projecting through said aperture and being operable to transmit movement from said responsive means to said lever, a spring resisting movement of said lever, and a coil spring surrounding said plunger and resisting movement of said responsive means.

3. In an apparatus of the character described, a casing containing a partition dividing said casing into separate chambers, one of said chambers having an inlet, a removable'plate member closing a side of said one chamber and having an outlet port, a valve member in said one chamber cooperable with said port and controlling flow therethrough, a lever carried by said plate member and operatively connected to said valve member, said partition having an aperture in registry with one end of said lever, a plunger, an adjustable abutment member in the other of said chambers and longitudinally movable along said plunger, a coil spring in the other of said chambers and held under compression between said partition and said abutment member, said plunger extending through said aperture and being adapted to engage said lever end to move said valve to open position, and a packing medium surrounding said plunger and positioned in said other chamber to seal said aperture whereby to prevent fluid communication between said chambers.

4. A valve of the character described, comprising a hollow casing having an inlet and an outlet and containing a valve port, a lever fulcrum in said casing, a valve member carried by said lever and cooperating with said port to control flow through said casing, a wall of said casinghaving .an aperture therethrough registering with said port, an adjustable stop member screw-threaded into said aperture and projecting at its opposite ends into and from said casing, the inner end of said stop member cooperating with said valve member to limit opening movement thereof and to move said valve member to closed position, theremostatic means cooperable with said lever to actuate said valve member, and a lost-motion connection between said thermostatic means and said valve member whereby said stop member canmove said valve member to closed position irrespective of the op-' eration of said thermostatic means.

5. A valve of the character described, comprising a casing having a flat open side, a flat closure plate secured to and closing said open side, an annular valve seat member projecting from said closure plate and defining a valve port, a. valve member seating on said seat member to prevent flow through said port, supporting lugs projecting from said closure plate and carrying a bearing member, a lever having side flanges pivotally supported on said bearing member, a spring surrounding said bearing member between said flanges and held .under compression between said closure plate and said lever whereby to urge said valve member to closed position, said lever having a recess intermediate said flanges, a plunger projecting into said casing and engageable in said recess to move said lever toward open position, temperature responsive means to move said plunger into engaging relation with said lever, and an adjustable stop' member threaded through a wall of said casing and cooperable with the valve carrying end of said lever to overcome said spring and move said valve to closed position.

' LEWIS W. EGGLESTON.

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