US1922628A - Cas burner - Google Patents

Description

A. W. MORSE Aug. l5, 1933.

GAS BURNER Filed July 9, 1931 Patented Aug. 15, 19.33

UNITD STATES GAS BURNER Albert W. Morse,

Application July 9, 1931.

15 Claims.

' ural draft, in certain predetermined proportions lil to each other during a unit movement of an operating lever or the like. That is, the invention resides in providing means whereby a fixed proportion between the primary and secondary air and the gas supply can be established and an operating lever or screw can be moved a fixed distance while the gas and primary and secondary air can be adjusted to desired proportions independent of the fixed travel of the said lever or o i screw.

This application is in fact a continuation in of copending application Serial #533,407 April 28, 193i which has been carried a step Y.ler by coniiecting the interlocked primary if air and gas supply of that application with a secondary air control. This proportional adjustment ci secondary air with the primary air and supply eliminates the necessity of adjusting the stack ofl a boiler or furnace to which the burner may be applied.

Other objects will become apparent in the accompanying drawing and the following specification in which a preferred form of the invention is described.

ln the drawing, Fig, 1 is a vertical longitudinal sectional view through a gas burner embodying the principles of the invention;

Fig. 2 is a cross sectional view along the plane of line 2-2 in Fig. 1;

Fig. 3 is a fragmentary horizontal sectional view along the plane of line 3-3 in Fig. 2;

Fig. 4 is a fragmentary elevational View of part of the operating mechanisms of the burner;

Fig. 5 -is a fragmentarycross sectional view along the plane of line 5 5 in Fig. l through the air register at the outlet end of the burner from which a furnace plate and combustion block have been omitted; and

Fig. 6 is a fragmentary elevational View of the gas burner. Y

Like characters Vof reference denote similar parts throughout the several views and the following specication. i

10 is a hollow burner casing, substantiall L shaped, having its longer branch 11 threaded Forest Hills, N. Y.

Serial No. 549,656

at 12 to receive an air adjusting cap 13 having a central outlet 14. The shorter branch 15 is threaded interiorly for an air supply pipe 16. Adjacent branch 15 and in alignment with the center of the branch 11 and outlet 14 of the adjusting cap 13 the casing is threaded to receive a substantially tubular supplemental casing 17. 18 is a bridge in its center having a restricted opening 19 provided with a valve seat 20. 21 is an inwardly extending tubular portion ofthe supplemental casing 17 in alignment with branch 11 of the casing 10. Its open end is somewhat reduced in diameter to receive slidingly a gas nozzle 22 of substantially cup shape. The eX- treme outer wall of the gas nozzle 22 is perforated with a plurality of openings or gas outlets 23. Its open end which slides within the tubular extension 2l is provided with a cross web 24 tapped to suit an operating rod 25 disposed in axial alignment with extension 2l, gas nozzle 22 and cap 13. 26 is a gas chamber within the supplemental casing 17 where the same projects beyond the casing l0, having at one side a gas supply led to it by a pipe 27. 28 is a gas valve disc adapted to seat against valve seat 20. This disc is bored out centrally to permit the passage therethrough of operating rod 25 and is threaded opposite its portion engaging seat 20 to receive a tubular member 29 which projects outwardly of the supplemental casing 17 through a packing gland 30 engaging a stuffing box bonnet 31 in alignment with the member 29 and valve disc 28. 32 is a round shaft slidingly engaging the inside of tubular member 29 and having its inner end threaded to receive a correspondingly threaded end of operating rod 25. Shaft 32 projects outwardly of tubular member 29 and is threaded at its extreme end to receive a link 33. 34 is a packing nut screwed onto the extreme outer end of member 29 surrounding shaft 32. 35 is a bracket extending outwardly from supplemental casing 17 adjacent its gas connection. Bracket 35 is bent upwardly at its eXtreme end at 36 in tubular shape to receive a fulcrum pin 37.

38 is a substantially U-shaped lever straddling both sides of end 36 of bracket 35 and is fulcrumed on pin 37. 39 is a handle piece fastened to lever 38. Lever 38 has at each side outwardly extending lugs 40 and 41 spaced, respectively, above and below the fulcrum pin 37. These pairs of lugs are bored out to receive each a screw 42 disposed parallel to the lever 38, having a head 43 below the lower lug 41 and a square 44 for manipulating with a wrench at its top and a lock nut 45 above the upper lug 40 to hold the screw in a fixed position. j

46 is a substantially square block in threaded engagement with one of the screws 42 and disposed between the lugs and 4l, its wide surface adjacent the lever preventing a turning movement when screw 42 is rotated about its axis which thus forces the block up and down when the screw is turned. 47 is a pin projecting outwardly from the block awa-y from the lever. 48 is a lever link con -ecting the pin 47 with a similar pin 48a forming part of the link 33.

49 is a square block similar to block 46 and similarly disposed upon screw 42 at the other` side of the lever 33, having also a pin 50 projecting therefrom. 5l is a threaded sleeve screwed onto the outwardly projecting end of tubular member 29 adjacent the packing nut Sleeve 5l is provided with a pin 52. A lever link 53 connects pins 5G and 52.

The cap k13 rests upon a support 54'which consists of a circular `flange 55 fastened to arfurnace plate 56 by means of screws and nuts 57. 53 is a central aperture through flange 55 in alignment with cap 13l and a combustion block 59 immediately adjacent to it. 60 are lugs carrying a cup-shaped collar 61 which is slipped over the outside of cap 13 for the purpose of supporting the same and thereby the whole burner structure,

without, however, impairing the adiustacility oi cap 13 upon threaded end i2 of the casing 1G. The space between flange 55 and the collar 31, defined by the length of lugs 60 forms a passage around the cap for secondary air to enter the boiler or furnace through aperture 58 S2 is a cylindrical shell slidably engaging the outside of collar 6l and lugs 6) forming an air register therewith and being adapted to close entirely the space between collar 61 and iiange 55. At each side shell 62 has a U-shaped groove 63, within which is slidably disposed a head 64 of a screw 65, the stem of which travels within an elongated slot 65 in the shell 62.v l

67 is a yoke comprising arms 63 and a center collar 69 which is slipped over leverhandle 39 and adjustably secured thereto by means of a set screw 70. To the lower ends of arms G3 is secured by means oi the usual bolt and nut 7l a connecting'bar 72 at each or" the burner. The other end of each connecting bar is fastened by a nut 73 to screw at each side of shell G2, the elongated slot 66 permitting the shell to be fastened to the connecting bar in a or open or closed position relative to the secondary air passage.

The operation of the burner is as follows:

Gas is admitted through pipe 27, past the valve disc 28, valve seat 20, through perforations 23 of the gas nozzle 22, to mix with air conveyed to the casing l0 through pipe i6, the resultant mixture being discharged through outlet 14 oi the adjusting cap 13.

By screwing down the block 46 from a position just below the upper lug 4G to a position in line with the fulcrum pin 37 the opening of the air valve, or rather the amount oi air passed around the gas nozzle 22 can be adjusted from maximum to minimum. it can readily be noted that with the block 46 in its top position, when the lever is moved from a closed position to the open position, the link 48 and consequently the shaft rod 25 and the nozzle 22 have their longest travel, while when the block is screwed down to be in alignment with fulcrum pin 37, there will be no movement at all of the link 48 and therefore no movement of the nozzle 22. y

Similarly, when the block 49 is in its top position, the lever link 53, the threaded sleeve 5l, tubular member 29 and the valve disc 28 have the longest travel, giving the largest gas opening, while with the block 49 screwed down to align with pin 37 there will be no movement of the disc 28 at all.

In the same manner, the travel o the shell 62 or, in other words, the opening or closing of the air register for the control of secondary air into the boiler or furnace, can be controlled by adjusting collar 69 of the yoke 67 so that the bolts and nuts 71 are brought into alignment with the fulcrurn pin 37 in which case there will be no movement at all of the shell 62, or the bolts and nuts 71 are raised above the fulcrum suihciently high to insure the maximum travel of the shell thereby opening or closing the air register completely, .adjustment of the air register lying between these two points. Y

It is obvious, therefore, that with a unit movement of the lever 38, that is at a xed full stroke,

various adjustments of gas and primary air can be had by screwing down more or less blocks 46 or 49'towards the center of the iulcrum pin 37, and by raising or lowering yoke 57 the amount of secondary air may be controlled. This makes possible the cross-connecting of a battery of burners by connecting all levers of the burners to a motor driven automatic control or for other purposes. This can easily be achieved because each burner or each set of burners can still be adjusted to minimum as well as maximum flame conditions, but with a maximum (constant) stroke or the lever.

It can thus clearly be seen that either the air adjusting valve or gas nozzle 22 at the outlet end of the burner or the gas adjusting valve disc 28 can be regulated from zero up to maximum opening by adjusting the position of the blocks 45 and 49. That is by screwing down the blocks to the zero point, the lever can be moved through (maximum movement) and the valves not be disturbed in any way. This results in the greatest possible iiexibility for operation with high air and low gas pressures or vice versa.

In making installations with burners of the kind described herein, it is not necessary to change the air pressure or gas pressure in order to use the burner, because even with an air pressure of pounds and a gas pressure of a few ounces, or a gas pressure of 1D0 pounds and an air pressure of a few ounces, tlie burner would still possess the flexibility needed with the movement of one lever and obtain proportional adjustment at all ranges of its normal regulation.

Attention is also drawn to the independently This is a vital the structure so that the gas valve disc 28 and the more, in some installations an oxidizing flame may be desired at all Ypoints of regulation, in which case the air adjusting cap can be screwed ofi until this condition is obtained. Then there may also be some cases where an oxidizing ame is required 'at-very low temperatures as is the case in some drying processes, while aV neutral ilame is desired Vat higher points of regulationsuch as in baking processes. The cap can also be screwed 01T the nozzle to obtain this condition and the air operating link 4.8 adjusted .so that the air valveor gas nozzle 22 opens slower thanthe gas valve disc 28, or not at all. i

It is understood, of course, that the construction disclosed is applicable to devices other than burners in' Which it is Wanted to mix proportionately gas and air, both if desired under pressure higher than the atmosphere and air under atmospheric pressure. or Where three gases of different characteristics are utilized under similarV conditions.

Various changes in the form, proportions and minor details of construction may be'resorted to Without `departing from the principle or sacriiic-l ing any of the advantages of the invention as dened in the appended claims.

While I have shown the air and gas conveyed through pipes to the burner casing by means of connections and have so designated the respective inlets in the appended claims, the term connections is 4to be interpreted broadly and may cover plain openings only in case of atmospheric air.

Moreover, While the construction shown is par-` ticularly applicable to boilers or furnaces with stack draft, it may also be used in combination With similar devices Where nov stack draft is available.` In `such case the jet velocity ofthe ilame induces through the register an amount of air which depends upon the combined velocity of the primary air and gas.

What I claim as new, is:

1. A gas burner comprising a structure having and air connections, gas and air valves, anl air` register at the outlet end of the burner, operating means Yfor the said valves and the said air register, and meansto obtain variante ranges of adjustment for the valves and register in predetermined 'proportions to4 each otheX fromv zero to maximum with aconetant travel oi-` the` said operating means. Y

Vifi'. A gas burner comprising a structure having gas and air connections, a gas and an air valve in alignment with eachother, anY air register at the outlet end of theburner, common operatingmeans for vthe valves and register, and means for varying the openings of the lsaid valves and register independently of and in predetermined proportions to each other from zero to maximum during a unit travel oi the said operating means.

3. A gas burner comprising a structure having gas and air connections, gas and air valves, an air register at the outlet end of. the burner, a lever adapted to operate the said valves and register, and adjusting means for varying the openings of the said valves and register independently oi and in predetermined proportions to each other from zero to maximum during a constant travelv or the said lever.

4. A gas burner comp ising a main casing having an air connection, a supplemental casing having a gas connection fastened to and projecting into the said main casing, gas and air valves in alignment With each other, an air register at the outlet end or" the burner, a lever fulcrumed to the said supplemental casing adapted to operate the said valves and register, and adjusting means for varying the openings of the said valves and register independently oi and in predetermined proportions to each other from zero to maximum.

5. Algas burner comprising a main casing having an vair connection, a supplemental Vcasing havingV a` gas connection fastened. to 'and pro-- jecting into the said` main casing, gas and air valves inalignment with each other, an air register atthe outlet end of the burn r, a lever fulcrumed to the-said supplemental casing adapted to operate'the said valves and register, and adjusting means for varying ne openings of the said valves and regis er independently of and in predetermined proportions to each other from zero to maximum during a fixed travel of the said lever.

6. VA gas burner comprising a main casing having an air connection, an adjustable air cap at the outlet end of the main casing and an air register around the said air cap, a supplemental casing having a gas connection fastened to and projecting into the said main casing, gas and air valves in alignment with each other and the said air cap,'a Vlever fulcrumed tothe said supplemental casing adapted to operate the said valves and register, and adjusting means for varying the openings ci the said valves and register independently of and in predetermined proportions to each other from zero to maximum i' during a unit movement of the said lever.

7. A gas burner comprising a main casing iaving a primary air connection, an adjustable' air cap at its outlet end,.and a register for the control of secondary air `around the said air cap,

a supplemental casing fastened tothe said main casing having a gasconnection, a gas valve and a'gas nozzle in alignmentwith each other, the

said gas nozzle being adapted' tocut oi the discharge oi primary air from the said cap, a lever fulcrumed to the said supplemental casing, and adjustable means connectingV the said valve, the said nozzle kand the saidregister to the said lever independently of each otherv for varying the opening of `thesaid .valve and the discharge oi primary air from the said cap and the amount of secondary air around thesaid cap in predetermined proportions from zero to maximum.

8. A gas burner comprising a main casing having a primary air connection, an adjustable air cap at its outlet end, and aregister rior-the conu trol of secondary air around the said air cap, a

supplemental casing fastened to thesaid main" casing'having a gas connection, a gas valve and Vagas nozzle in alignment with each other, the

said gas nozzle being adapted to cut off the discharge of primary air from the said cap, a lever fulcrumed to the said supplemental casing, and

adjustable means connecting the said valve, the

said nozzle and the said register to the said lever independently of each other for varying the opening of the said valve and the discharge of primary air from the said cap and the amount of secondary air around the said cap in predetermined proportions from zero to maximum during a fixed movement of the said lever.

9. A gas burner comprising a structure having gas and air connections, a gas valve and a gas nozzle in alignment with each other, a tube A carrying the said Valve, and a spindle adapted to reciprocate within the said tube carrying thev gas nozzle in alignment with each other, a tube carrying the said valve', andr aspindle` adapted to reciprocate Within the said tube carrying the said nozzle, anV air register at the outlet end of the burner, an operating lever, and means adjustablyconnecting the said tube, the said spindle and the said register to the said lever independently of each other for varying the .movement or the said valve, nozzle'andlregister in predetermined proportions to each other during xed travels of the said lever. Y

11. A gas burner comprisinga main casing having an air connection, an adjustable air cap at its outlet end and an air register around the said air cap, a supplemental casing 'fastened to the said main casing having a gas connection, ay

gas valve and a gas nozzle in alignment With each other, a tube carrying the said valve, and a spindle adapted to reciprocate Within the said tubek and carrying the said nozzle, a lever fulcrumed to the said supplemental casing, and means adjustably connecting the said tube, spindle and register 4to the said lever independently of each other, for varying themovement of the said valve, nozzle and register in predetermined relations to each other.

l2. A gas burner comprising a main casing having an air connection, an adjustableair cap at its outlet end and an air register around the said air cap, a supplemental casing fastened to the said main casing having a gas connection, a gas valve and a gas nozzle in alignment with each other, a tube carrying the said valve, and a spindle adapted to reciprocate Within the saidtube and carrying the said nozzle, a lever ful-Y crurnedY to the said supplemental casing, and means adjustably connecting the said tube, spindle and register to the said lever independentlyy of each other, for varying .the movement of the said valve, nozzle and register in predetermined relations to each other during a fixed travel of a supplemental casing fastened to the said main casing having agas connection, a gas valve and a gas nozzle in alignment with each other, a tube carrying the said valve, and a spindle adapted to reciprocate Within the said ,tube carrying the said nozzle, the said nozzle being adapted to out` off the discharge of primary air from the said cap, a lever fulcrumed to the said supplemental casing, and means adjustably connecting the said tube, spindle and register to the said lever independently of each other for varying theopening of the said valve and the discharge of primary air fronrthe said cap and the amount ofvsecondary air around the said cap in'predetermined proportions to each other.

14. A gas burner comprising a main casing having a primary air connection, an adjustable air cap at its outlet end, and a register for the control of secondary air around the said air cap, a supplemental casing fastened to the said main casing having a gas connection, a gas valve and a gas nozzle in alignment with each other, a tube carrying the said valve, and a spindle adapted to reciprocate within the said tube carrying the said nozzle, the said nozzle being adapted to cut olif thedischarge of primary air'irorn the said'cap, a lever fulcruzned to the said supplemental casing, and means adjustably connecting the said tube, spindle and register'to the said lever independently of each other for varying the opening oi the said valve and the discharge of primary air from theA said cap and the amount of secondary air around the said cap in predetermined proportions to each other during a constant travel of the said lever;

l5. A gas burner comprising a structure having gas and air connections, an air register at the outlet end of the burner, a gas valve .and a ff gas nozzle inV alignment with each other, a tube carrying the said valve, and a spindle adapted toreciprocate within the said tube carrying the said nozzle, an operating lever, a link connecting the said tube and lever, another link connecting the said spindle and lever, andV means for adjusting the positions of the said links independently of each other from substantially parallel to the said tube and spindle to ones in angular vrelation to a planeV passing there thru for the purpose of varying the travel of the said spindle and tube, respectively, during the movement of the said lever, an adjustable collar around the said lever having depending arms, bars connecting the saidl arms with the said register, pins vjoining the said barsto the saidv arms, the collar being adapted to vary they distance between the said pins and the fulcrum of the said lever for theV purpose oi varying the opening of the said air register in predetermined proportions to the i travel of the said gas valve and gas nozzle dur- ALBERT W. MORSE.

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