US1751688A - Burner-control means - Google Patents

Description

March 25, 1930.

L. W. EGGLESTON 3,75L688 BURNER CONTROL MEANS Filed Feb. 2l, 1927 Patented Mar. 25, 1930 UNITED STATI-:s

PATENT OFFICE i LEWIS W. EGGLES'ION, or CLARENCE TOWNSHIP, COUNTY, Nnw'vonx, AssIGNOa 'ro AMERICAN RADIATOR. COMPANY, or Naw. YORK, N. Y., A CORPORATION O NEW' Y BURNER-@ONTBOL MEANS Application led February A21, 1927. Serial No. 170,051.

My invention relates to new and useful improvements in fuel burner control means, yand more particularly to automatic pilot operated fuel valves.

An object of my invention is to provide cntrol means for an oil or gas burner or the li e.

Another object is to construct a novel.l

valve and an automatic pilot control therel0 for.

A further Objectis tok Construct a fuel valve which will cut olf the flow of fuel when the pilot light is extinguished.

A still further object is to provide a device which is simple in construction and efficient' in operation.

The invention consistsdin the improved construction and combination of parts, -to be more fully described hereinafter, and the novelty of which will be particularly pointed out and distinctly claimed. l i

In the accompanyin drawing I have full and clearly illustrate a preferred embodlment of my invention, to betaken as a part of this specification', and wherein- The figure is a longitudinal, central,.sec tional view through my valve and pilot con'- trol means.

Referring to the drawing `by characters of reference, 1 designates a hollow valve casing having an inlet port 2 andan Outlet port 3, which is connected by suitable pipingto a main burner (not shown). v`-VVithl'n the'valve casing 1 is a partition or web 4 separating the 3l inlet from the outlet and having a passage or aperture v5 therein, which is provlded with.

a valve seat 6. The side wall of casing 1 has an opening 7 therethrough. which is closed by a plug 8, preferably threaded into said opening 7 and having an axial bore 9. Within bore 9 is a constriction 10 forming a supporting shoulder. The plug 8 is also provided with -an annular recess 11 in its underside 12. Supported in bore 9` is a guide pin L 13 having a flange 14 resting on the shoulder 10. The pin 13 is held in position in the plug 8 by a sleeve 12a surrounding pin 13 and threaded in bore 9, and is hermetically sealed therein by suitable `packing 15. The lower end of pin 13 projects beyond plug 8 and into the valve Casin 1 and isof tubular form having 'diametrica ly "op osed longitudlnal guide slots 16, of whiclIi but one 4is shown. ,Slidable in the tubular portion of p1n `13 is a valve stem 17 having pins 18 pro- 55 :gecting 1nto said slots 16 to permit rotation of the stem 17 and valve head 19 carried there- Vby, by means of'a slot 20 in the vouter end of pin 13, 1n order that the valve may be ground,

and to insure free working movement there- 'ao of. Positioned in the casing l and supported by the valve head 19, is a coil spring 21 surrounding stem 17 and -seated under compression with its other or upper end in the recess 11. The spring 21 normally tends to close the valve and maintain it on its seat 6. The under face of valve head 19 has a boss 22 lwluch projects through passage 5, and which 1s hollowand -internally threaded, as at 23. Adjustablycarried by threaded engagement with boss.22 is an adjustment and contact member 24' havingl a head 25 which is polygonal 1n cross-section, and preferably square.

` The head 25 has 'a conical socket 26 in its free ,wall 27.

The o en outer end of llange 27 is sealed to a .depen 'ng cup-shaped container 31, preferablyformed 0f sheet-metal 'and having acircumferential lip 32 on the side wall 31vwhich abuts the extension 30 and overlies the wall o r flange 27. A protecting sleeve' and fastening means 33 surrounds the side wall 31 of the'cntainer 31, and has an internal shoulder '34 which Cooperate'swith the end of the wall 27 to lock the guide member 28 vand container 31 iny o'sition. The sleeve 33 is4 preferably threa ed. on the fwall 27 so that 1t ymay, be drawn up tight tohermetically seal lthe cas- 100 sev in 1. The base 35 of the container 31 is provi ed with an internal annular stop 36 having radial depressions 37 across the stop 36,

\ sealed by any well known medium, such as solder, to the side wall 31a.

Along the inner circumference of the plate 39 is sealed one end of a Vlongitudinally expansible-collapsible member, preferably in the form of a cylindri'cal metallic bellows 41, which extends into the container 31 and terminates adjacent the stop 36. The free end of bellows 41 /is closed by a head or plate 42 having an annular abutment 43 opposed to the stop 36 andh adapted to Contact the same to limit the.downward movement or exp sion of bellows 41. The

center portion of ead 42 has an opening 44,A

in which is fixed a push rod 45 having a hollow open ended bore 46. e At its lower end the bore 46 opens through head 42 into the chamber 47 between the bellows 41 and container 31. At its upper end the bore is constricted at 48 and has `a tube 49 which issealed after a suitable expansive or volatile liquid, such as aniline, has been admitted to chamber/ 47 through tube 49, bore 46 and ports 37 and to the thermostat to be described.' The sealed tube 49 is protected by acap 50. The cap 50 is preferably threaded on the rod 45 and has a conical top 51 which. engages the Contact member 24, and is positioned. by the socket 26 to insure operative relation between the parts. j

The bottom 35 of container 31 has an opening 51 within the annular stop 36, in which is fixed an apertured plug 52.' A conduit or tube' 53 of any suitable fiexible material, and of any desir d length, is fixed to vand communicates through the apertured plug 52 .with the interior of the chamber 47. Near its other end 63, the conduit 53 passes through a second apertured plug 54 whichis provided with packing means 55 of any well known type .which will prevent leakage of gas or liquid through the plug and around the conduit.

The plug 54 is threaded tightly into an opening 56 in a supporting union 57. Opposite the opening 56 is a second opening 57a in which a burner tube 58 is threaded. Carried by the upper end of the burner tube 58 is a hollow cap 60 having burner apertures 61. Fixed in the hollow cap 60 and projecting therefrom into burner tube 58 in spaced lateral relation thereto, is a tubular. thermostatic bulb 62 which telescopes the end 63 of conduit 53, and is sealed thereto by solderin welding, or the like. The cap 60 is -of su cient internal diameter at the burner aperwhich is fixed a fuel-carrying pi e 66. The vconduit v53 is preferably covere tecting andinsulatin coating or cover 67.

by a pro- In operation, the pin 13 is'rotated to adjust the member 24 to regulate the .capacity of the chamber 47 so that ex ansion of the fluid in the-bulb 62, due to the eat of the pilot flame,

.will act 'td open valve 19.- 'The fuel issuing from the apertures 61 is ignited, which will heat the flange 64l and the bulb 62, causing the fluid within the bulb 62 to expand or gasify, thereby forcing fluid from the bulb through the conduit 53 into chamber 47. The pressure exerted by the fluid thus forced into thewchamber 47 will act upon the head 42 to raise the same, collapsing the bellows 41. As the head -42 moves upwardly the rod 45 will move with it and lift the valve head 19 from its seat 6 againstthe action of the spring 2l. As long as the pilot burns, .the fiuid in the bulb G12-will remain in expanded condition, holding the bellows 41'co1lapsed so that the valve vwill be maintained in open position; but if the 'pilot is extinguished for any reason the fluid in the thermostat bulb 62 will cool and'contract, which will permit the spring 21 to function `to force the fluid from chamber 47 and to seat the valve head 19 on its seat 6, thereby closing the valve and cutting off the' flow of fuel to the main burner (not hoivn), and preventing the loss of unburned IIt is evident that my invention may be used with any type of burner which utilizes liquid or gaseous fuel, andwill both conserve fuel and prevent the escape of dangerous unburned gases when the ignition means fails to operate.

What I claim and desire to secure by Letters Patent of the United States is 1. In a device of the character described, a Valve casing, a partition in said casing having an openin therethrough, a valve in said casing adapte to close saidv opening, a pilot burner tube having a burner aperture, fuel feed means for said tube, thermally expansible-contractible means in said tube adjacent said burner aperture, and means operatively connecting said thermal means to said valve.

2. In a device of the character described', a

valve casing,.a partition in said casing hav- .f

ing an opening therethrough, a valve in said casing adapted to close saidopening, said casing having an open hollow extension, `v`an expansible-collapsible member sealing/"said extension, means carried by said. member and extending into contact with said valve, a pilot A burner tube'I havin a burner aperture, vfuel feed means for sai tube, thermally expansifble-contractible means in said tube adjacent said burner-aperture, and a connecting memf ,"berzbctween` said thermal means and said insane 1o Se expansible-contractible member. 3. Ina device of the character described, a valve casing, a artition'in said casing havint erethrough, a valve in said n casing a apte -to close said opening, vmeans on sald valve to normally seat the same, said v casinghaving a hollow open extension, ar contact member depending from. said" valve throughs'aid openin guide means for said member, an expansi le-collapsible` member sealing sald extenslon, means engaging said contact member and carried by said sealing ymember, afpilot tube having a burner aperture therein, thermally expansible-contracti- .ble means in said tube` adjacent said burner aperturekand 'means operatively connecting,

` said sealin member` and said thermal meaiius.

4. In a evice of the character described, a

valve casing, a partition in saidcasing having an openin therethrough, a valve ,lnlsaid casing adapte to close sald openlng, means'Y on said valve to normally seat the same, said casing having a hollow open extension, an adj ustable contact member depending from said valve through said opening,` gulde means for Hsaid member, a chamber sealing said extension, said chamber having alon'gitudinally x expansible-contractible' side wall, means eni sible-contractible means in said tube adjacentv gaging said adjustable contact member and carried by said side wall, a` pilot tube-having a burner aperturetherein, thermally expansaid burner aperture, and means operatively connectingsaid side wall and said thermal i means.l 5. In adevice of the character described, a valve casing having a partition therein, said) partition havin an opening provided with a valve s eat,.a va ve adapted to cooperate with said seat, said valve having a stem, aN guide forv said stem, said valve havin a depending boss, said casing havin a'ho ow open-extenslon, a cup-shapedbe ows closing said extension, a container member for said bellows supported by said extension, afpush rod carriedby said bellows andengaging said boss, a :pilot tube havinga burnerapertu're, fuel feed` ,means for aid tube, thermallyresponsive means within said tubel adjacent said burner aperture, and power transmission means between .said thermally responsive A means andsa-id bellows.

f6.' In a"- device of the character described,

l a valve casing'having an inlet and an outlet, 'a parttiOninsaid casing between said inlet andsaid -out1et, said partition having an provided with'a valve seat, a valve a apte to engage said scatto close the opening, guide means carried by said casing, said valve having a stem reciprocable in said guide means, vvalve to its seat, said valve having a depend- P spring means normally urging said in boss extending through said opening, a ho lowd open yextension on said casing in laxial alignment with said opening, a hollow open sleeve carried by-said extension, pressure responsive means within said sleeveand sealing-said extension, and a push rod carried by said ressureresponsive means andabutting liquid, and a cap member on said rod overlyngwsaid tube and abutting said contact memer. v

8.. In a device of the character described, a valve casing, alpartitionrin said casing having an opening therethrough, a valve in said casing adapted to closesaid opening, said valve having astem and a' depending boss, guide means for said stem,a hollow open extension on said casing in axial alignment with said opening, longitudinally adjustable means carried by said boss, means to prevent rotation of said adjustable means,means to rotate said valve tor adj-ust said adjustable means, an expansible-collapsible chamber sealing said open extension, a push rod carried by said chamber and engaging said adjustable means, and a thermostatJoperatively connected to said chamber to actuate said valve. j x j u -9. Ina device of the character described; a valve casing, a partition, in said casing having an opening therethrough, a valve in'said u casing adapted 4to close said opening, spring means normally kurging said valve to close ico los

said opening, said valve having a stem and a depending boss, guide means for said stem,

a hollow open extension on said casing'r in axial alignment with said opening, longi-` tudinally adjustable means carried by said boss, said adjustable means having a bearing socket, an expansible-collapsible `chamber .sealing said open extension, a push; rod ca rried by said chamber and engaging the bear- ,ing socket of said adjustable means, a thermostat operatively connected to said chamber to actuate said valve,.and means external of said casing to adjust said adjustable means to regulate the action of said thermostat.

10. In a device of the character described,

a valve casing having an inlet and an outlet,

a partition in said casing having a passage therethrough, a valve to close said passage, a

hollow open extensionbn said casing 1n axial alignmentpwith sa1d passage, a sleeve carried by said extension, a cup-shaped container opening into and sealing said casino' and carried by said sleeve, a resilient longitudinally expansible-contractible member 'Within said container-and having a head adjacent the base of said container, means to seal the open end of said resilient member to the side Wall of said container, plunger means carried by said head and operatlvelyl` engaging said valve, a pilot burner tube having a burner aperture, a heat responsive medium Within said tube, and means to transmit the expansive force of said medium to said head.

11. In a device of the character described, a valve casing having a valve therein, pressure responsive means carried by said casing, a push rod carried by' said means and engaging said valve, a pilot burner tube having a fuel inlet, a cap on said tube having a In testimony whereof I have hereunto'y signed my name. l'

LEWIS W. EGGLESTON.

burner aperture, a flange on said cap above said aperture, a bulb supported byv said cap in the tube, a 'conduit connecting said bulb and said pressure responsive means, 'and a thermally expansive medium in said bulb and said conduit.

12. In a device of the character described, a valve casing having an inlet and an outlet and a valve port, a valve adapted to o en and close said port, an expansible-col apsible chamber, means operatively connecting said valve and said chamber, a pilot burner tube having a burner aperture, a bulb Within said tube adjacent said aperture, a conduit having one end fixed to and opening into said bulb and having the other end fixed to and openp ing into said chamber, a thermally ,expansible medium Within said bulb, conduit and chamber, and fuel feed means for said burner tube.

13. In a device of the character described, a pilot burner tube comprising a coupling having' a plurality pf openings, a fuelfeed pipe fixed in one of said openings, an apertured plug in another of said openings, an open tube carried by said coupling and fixed in another of said openings, a cap closing the end of said tube, a burner aperture in said cap, a thermal bulb mounted in said cap and extending into said tube in spaced relation to the side Walls thereof, a pressure transmitting `conduit` sealed in said bulb and supported in said apertured plug, and a thermally expan sive medium in said bulb and conduit.4

14. In a device of the character described,

a pilot burner tube comprising a coupling -5 having aplurality of openings, a fuel feed pipe fixed in one of said openings, an apertured plug in 'another of said openings, an

open tube carried by said coupling and fixed in another of said openings, a cap closing the end of said tube, said cap having a heat-absorbing flange, a burner aperture in said cap adjacent said Hange, a thermal bulb mounted in said cap and extending into said tube in spaced relation to the side Walls thereof, a pressure transmitting conduit sealed in said

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