US1932739A

US1932739A - Gas burner

Info

Publication number: US1932739A
Authority: US
Publication date: 1933-10-31
Anticipated expiration: 1950-10-31

Description

Oct. 31, 1933. KERR 1,932,739

GAS BURNER Filed July 20, 1932 Patented Oct. 31, 1933 UNITED STATES GAS BURNER Harry E. Kerr, Cleveland, Ohio, assignor to The Barber Gas Burner Ohio Company, Cleveland,

Application July 20, 1932. Serial No. 623,470

3 Claims.

This invention relates to gas burners andmore particularly to jet burners of the type wherein a plurality of coinmingling tubes or jets are symmetrically mounted upon a burner body. The general object of the invention is to provide the burner body with a pilot light, and a conveniently arranged and efiicient thermostatically operated plunger valve common to all the burner jets for controlling the flow of gas to the burner.

A further object of the invention is to provide a safety pilot light thermostatic control for causing the valve to shut off the flow of gas to the burner jets when the gas flow't o the pilot light is interrupted.

Still another object of the invention is the provision of means for preventing the bi-metal bar from becoming overheated or otherwise damaged by the pilot flame.

Otherobjects and advantages will be apparent as the specification is read in connection with the accompanying drawing; in which Figure 1 is a top view of a gas burner with safety pilot light thermostatic control means embodying a guard member for preventing overheating of the thermostatic, control means;

Figure 2 is a sectional view on line 2-2 of Figure 1;

Figure 3 is an enlarged sectional view on line 3-3 of Figure 1 showing the thermostatic control means in action with the pilot light burning;

Figure 4 is a view similar to Figure 3 with the pilot light extinguished and the thermostatic element resting in the guard member;

Figure 5 is a perspective view of the bi-metal member of the thermostatic control; and

Figure 6 is a perspective view of the guard member for the bi-metal member.

Referring more particularly to the drawing the hollow cast burner body or manifold A, preferably of substantially star shape, and cast construction, comprises top and bottom walls 1 and 2 and side wall 3 respectively. A threaded opening 4, communicating with a depending chambered or conduit portion 5 formed radially of the burner on the bottom thereof and extending from wall 3 to the center of the burner, is adapted to receive the threaded end of a fuel supply pipe, not shown. The top wall 1 of the body A is provided with a series of protuberances or raised portions 6 at uniformly spaced places, in the present embodiment six in number. These protuberances are formed with threaded openings communicating with gas chamber 8 coextensive with the interior of hollow body A, and threadedly mounted in these openings are a plurality of commingling tubes or jets 9.

The jets 9 are preferably of brass and surmounted by a separate cap 10. One end is screw threaded for attachment to the protuberances 6 and has a cupped entrance 11 with a small discharge orifice 12 for gas. Air intake ports 12" extend through the side walls of the jet and open into a central main passage 50. The top of cap 10 is rounded or ball-shaped, and relatively narrow intersecting slots 13 are sawed at right angles across the top and downwardly into the side walls of the cap. A round relatively short headed deflector pin 14 is forced into the opening at the intersection, the segmental portions between the slots 13 being sufliciently -resilient to expand during this operation, and also to spring back with their extremities engaged behind the head of the pin for this purpose, after the pin has been forced home, thus ef fectually locking the pin in position.

The top wall of burner body A is formed with a centrally disposed threaded opening 16 in which a threaded apertured guide nut or capl'l preferably of Monel metal is screwed.- An elongated cylindrical valve plunger 18, preferably of tobin bronze extends freely through the valve guide opening 19 in guide nut or cap 1'7 in axial alinement with a small gas passage 20 formed in bottom wall 2 of body A. The lower end of the plunger valve 18 has an enlarged rounded head 21 which seats against the recessed wall of gas passage 20 and eiiectually closes the same when the plunger valve is in lowered position, and when the valve is in raised position the slightly beveled shoulder 22 of head 21 forms a tight seal with the correspondingly. beveled seat 23 formed in the lower end of the wall of valve guide opening 19. As gas passage 20 communicates with the gas supply conduit 5, the supply of gas to the burner will be shut off when the valve is moved to seating postion, in a manner hereinafter described. The escape of gas through valve guide opening 19 will also be eifectually prevented by the double seating action of the valve when the latter is in its upper or raised position, and while the main burner is burning.

Movement of the valve 18 is thermostatically controlled through the medium of a horizontally disposed compensating spring extension 24, preferably of nickle steel, secured at its outer end to a bi-metal bar or member 25, and engaging an annular groove 26 in the upper end of the valve with its bifurcated inner end. The bar 25 is connected to the vertical arm 27 of a bracket 28, which bracket is preferably an integral part of the main burner body A, any suitable fastener such as screw 29 being employed to secure bar 25 in place on the bracket arm. The supporting bracket 28 has a horizontally disposed arm 30 which is formed with a round enlargement 31, centrally apertured as at 32 to snugly receive a pilot jet 32', a set screw 33 being employed to prevent accidental dislodgement of the jet and also to permit of vertical adjustment of the latter. The lower end of the pilot jet is connected by any suitable valved pipprotective action of the walls of the shield or deing, not shown ,2 with the main rgas Sup ly, and flectorganiair'pocket 37 is formed between the the up'per-end'lof the-jet is positioned fdirectly "inner or upper: face of the guard and the lower beneath and in line with the bi-metal bar 25. face of the bar 25 which effectually insulates During normal operations of the burner, the and protects the latter from the direct heating 80 burner jets 9 and pilot jet 32' will burn simuier 'efifect of the fiame. As a result of the line taneously and continuously, and of course thei contact between the bar and its protector as valve 18 will be normally held in raised orliigure distinguished from a face contact between the 2 position by the upwardly mending-expansive vv p'arts,"':the transmission of heat to the bar is 10 action of bar 25, thus permitting freecflow oi' :i'much more uniform and in consequence the 85 gas to the main burner jets. However should the thermostatic action of the bar is greatly enflow of gas to the pilot jet.ber. interrupted due hanced.

to accident or other cause,- the pilot'lig'ht will" 'In order to more efiectively direct the flame become extinguished, and the bi-metal=bar=2513fronrrpilot'jet 32' upwardly toward the tips of will cool oft and contract, thus forcing the valve burner jets or tubes 9, and also to protect the 90 18 to itsldwens'eat'ed position, this body of the-burner from-heat radiating from movementfpf"theyalvbeing facilitated by its thepilot, I provide aguide' plate'BB- ofsuitable vertical arrangement ='-'and its loose" guiding'fit material such-as sheet metal. Thisplate com- 'irFcap"17 liif fiow-of gasrr m the main supprises an aperturedear portion 39 which sleeves -'151y- =wm them be almost' "instazitaneousiyshut over the'jet 32 and seats upon the bracket 23, 95 011 andthebninef jet extinguished. Assuming andan upwardly and inwardly bent flaring body the bi metal'b'ar becoinesiioldand"it i's-"desi-red portion 40; which extends between the pilot jet to felig'lit the main bu'rnerjets, but 'a iew secandthetwo ne'armost 'burner jets I 9 symmetonds are'fiequired after 'the'pilQtjethas been rically arranged on opposite sides- 0f the bracket "relihtedto'heat-the bar -25$ siiflieient-ly to cause 28 supporting the pilotjet/ Flame 1 from the 1(3{) the*latterto' exparid and'raise 'the -valve to its pilot jet willth'us be guid'edupWardlifi'along the -upper-or elevated' position: thus permitting=iree inclined flaring surface' of-the'body40 of the *fiw ofigas thrbuglrthe 'main burrier;tl1e'jets of -guide-plate= to' -the'=b'urner 'jets,--and at-thesame 'Whicli=-instafitaneously thereafter become li'ghttime the heat radiating from the jet will be '30 ed by the flamefiomthe pilot jeti" throwr'rbeeper-away from the body of-the 105 "1Mis prvitislY-steitdlWlin the-valve -is en its burner. i 5 hpfiern iost positirr the' slfou-lder 22 0f "the lat- Having thus describedmy invention, what I -tefi' 'cooprates -witlf -'seat -23 to effect a'seai claim is: I against-the escapeof gas from the-burner, and 1; Inja gas burnerincluding avalve controlas the' interrriediatefposition is butmomntary *li'n'g the amount ofgas fiowing'thereto, 'a sub- 1-10 i 'little orfno-g'as carrescape through'tlieopening stantially straight thermo element-rigidly sup- IQ -oi -cap li'l" Tlie tensepositive action of b'a' ported atoneend and'operatively connected to 25h'olds the valve ti'ghtlytoi its seats; said vaive; a'heatingmeans positioned below --Efxperi"nce jhas proven that-"where"'tlie' pilot "said therm'o element and-injheating relation '40 flame' comes"in directcontact with the thermotherewith, and av-shaped fianged'guard mem- 115 static orbi'-'metal bar 2iif'tlie latteif i's s'ubject berenclosingthe bottoman'd'side edges of said {tothe detericrating' eifecttorimpurities-in the thermo element and contacting with the-free ga's, and that the thermostatidactionoffl the"bar end"theredf-on; line contacts only to prevent is als'o "adversely "'efietd by? tli'efintehse'h'eat overheating-of said-e1ement,'said' guard memtdwhicli 'itistlius Suwanee-"reorder totransber c'obperating with saidelment to form an in- G120 'mitthe' heat from tfiepil'ovflame unifdrmly to 'sulating-air pocket opposite the bottom surface 'tlfe-bi-metal'bar; and-also to -"protect"-th e lat- *ofthe-free end thereoij "ter fromth'e*direct'efiectof theflame; I pro 2. In a gas -'burner-including a valve controlvid a metallic deflector-or shiel d'34, which de-- ling "the amount of gas flowing thereto, a sub- 'flectsfthe'flame-laterally and thence upwardly stantially straight thermo element rigidly sup- '125 and iirouiidbutiout of Contact withthe bar. ported at one end and operatively connected to 'Ihis-deflect0r"has' af 'fiatouter endportion 36, said valve, a heating means positioned below which"issecured"to" the=arm"27 of the bracket said thermo element and in heating relation 28"difctly"beneatlrthe'-bar=25 by means of therewith, and a guard member for said thermo L 'screw29 whi'ch screw also serves'to attach'th e element rigidly supported by said burner end '130 bar 25 in place. enclosing the bottom and side edges of said The bodyof deflectbr34 is substantially V thermo element, said guard'member cooperatsh'aped inhc'ross section and is provided with a 'ing with said element to form an insulating air pair of side'ffl'anges-35 snugly receiving therebe pocket opposite the bottom surface of the free i tween'andengaging the side edges of the bar end thereof. 2 5' and also extending slightly above'the upper .1m a gas burner including a valve centrefa-ceof the bar, thus protecting the bar from dilingthe amount of gas flowing thereto, a thermo rect flame contact. Due to their ortrough element rigidly supported at one end and opshape oftlie defictorfguard the binetal bar eratively connected to said valve, a heating 65 contacts 'therewitlr only"at its side edges; eX- means positioned below said thermo element "cept at itsouter end which is superim'posedhp'on and in heating'relation therewith and a chanthe fiatouter end portion 26 'o'f'the deflector, neled guard member rigidly supported on said at the point of attachment of these parts to the burner enclosing the bottom and] side edges bracket! However it will' be noted" that this said thermo element, said guard member coop- 7;) 'area-"is-ret'notefrom the'pilot flame; The deerating with said element to form an insuiatine' M5 flector serves the important function of keepair pocket which varies in size as said thermoing" the bar 25 free from carbon deposit which stat responds to changes in temperature. deposit interferes with the proper thermostatic action of the bar. HARRY E. KERR.

- 75 It'will also be noted that in addition to the