US1917897A - Gas burner - Google Patents

Description

A. W. MORSE GAS BURNER July 11, 1933.

Filed Aug. 24, 1931 INVENTOR.

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WN um www J @w i www NM. MN ww uw QS S wvl mm mw Nm N mv D Q' Nv l. NN www N mw mm. W* mv s@ m l Patented July 11, 1933 UNITED VSTATES PATENT osi-*ice ALBERT W. MORSE, OF FOREST HILLS, NEW YORK GAS BURNER Application ledAugiist 24, 1931. Serial No. 558,909.

It is the particular object to provide such a burner with means to vregulate the amount of atmospheric air dra-wn into it by the velocity l@ of the gas jet incertain predetermined proportions to each other during a unit move.- inent of an operating lever or the like. An-

other object is to provide an additional inq u let for atmospheric air `between the burner and the furnace forming a structural part Vof a burner-support, through which secondary air isdrawn by the natural draft of the furnace or boiler assisted by the velocity o of the aforesaid combined gas and primary 9 air mixture, and to` interlock the gas, primary and secondary air. That is, the invention resides in means whereby a fixed proportion between a primary and secondary air andthe '05 gas supply can be established and an operating screw or lever can be moved a fixed vdistance while the gas and primary and secondary air can be adjusted to desired proportions independent of the fixed travel of the 'saidl lever or screw.

39 This application is in fact an adaptation of the principles of construction and operation brought out in my copending applications filed, respectively, April 2S, 1931, Serial #533,407 and July 9, 1931, Serial #$549,656.

40 Fig. 1 -is a vertical longitudinal sectionalV view through a gas burner embodying the principles of the invention;

Fig. 2 is a cross sectional view along the 45 plane of line 2-2 in Fig. 1;

Fig. 3 is a fragmentary horizontal sectional view along the plane of line 33 in Fig. 2;

Fig. 4 is a fragmentary elevational view of 50 part of the `operating mechanisms of the burner;

Other objects will become apparent in the.

Fig. 5 is a fragmentary cross sectional view through the airregister at the outletend of the burner from which a furnace plate and combustion block have been4 omitted; and

Fig. 6 is a fragmentary elevational view 55 of the gas burner.` f

1 Like characters of reference denote similar parts throughout the severalviews and the following specification.

10 is a substantially tubular burner casing or inspirator, having an enlarged bowl yshaped inlet 11 and an eXteriorlyV threaded portion 12 adjacent thereto. Supported in the center of the inlet bowl 11 by means of Iribs 13 and a tubular bracket 14 is a bush- 65 ing or gas nozzle holder 15. The annular space around bracket 14 and the inside Vof bowl 11 forms an inlet 16 for primary atmospheric air into the inner or mixing portion 17 ofthe inspirator 10. Screwed into 70 the outlet end of the gas ynozzle holder is a gas nozzle 1 8 having a small outlet 19 and yan enlarged inlet end 20 converging toward the outlet 19. The inletend of the holder 15 is' tapped to receive one end of a gas tube 21;"The central portion of the holder 15 is provided with a central support 22 for a gas regulating spindlev23. 24 are a number of ports through the support 22 around the spindlev 23 and connecting the 80 inlet and outlet of the nozzle holder 15. 'The other end ofthe gas tube 21 is threaded to receive aT 25, having an inlet 26 at its bottom. 27 is a stufhng boX gland in the T,

opposite its connection to the gas tube, the

gas regulating spindle 23 projecting through the T and gland 27 outwardly thereof and` being threaded at 2 and provided with prefi erably a screw driver slot 29 at its end. '30

is a primary air shutter of substantially conical shape, its large annular base adapted to contact with the end faces of the inlet bowl 11 of the inspiratorand its apex being tapped to receive one end of a tubular guide 31 which is concentric with and preferably 95 slidingly engages the outside of the gas tube 21. The other end of the guide'is threaded at its outside at 32. i

Fastened toa projecting lug 33 of the inlet bowl 11`of the inspirator bymeans of suitlo@ able bolts 34 is a bracket 35. This bracket is bent upwardly at its extreme end. at 36 in tubular shape to receive a fulcrum pin 37.

3S is a substantially U-shaped lever straddliiig both sides of end 36 of the bracket 35 and is fulciuined on pin 37. 39 is a handle piece fastened to lever 88. 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 anda square 44 for manipuf 'nutted hrough inlet 26, T 25, gas tube 21,

lating with a wrench at its top and a lock nut 45 above the uppei' lug 40 to hold'rthe screw in a lixed position.

. 46 is a substantially square block in threaded engagement with one of the screws 42 and l disposed between the lugs 40* and 41its wide surface adjacent the levei preventing a turning movement when screw 421 is rotated about Y its axis which thus forces the block up and down when the screw is turned. 47 lis a pin projecting outwardly from the block away from the lever. 48 is a lever link 'connecting the pin 47with a similar pin 48a forming part of a link 485 which is sciewed over the threaded. end 28 of the gas regulating spindle 23.

49 is a square block similar to block 46 and similarly disposed upon screw42 at the other side of the lever 38, having also a pin 50 projectingvtherefrom. 51 is a threaded sleeve screwed onto the externally threaded end 32 i of the guide 3l. Sleeve 51 is provided with a pin 52. A lever link 53 connects pins 50 and 52. Y y

The inspirator ktube 10 is screwed into a support 54 which consists of a circular flange 55 fastened to a furnace pla-te 56 by means of screws and nuts 57. 5S is a central aperture through flange 55 in alignment with the inspirator 1() anda combustionblock 59 iinmediatelyadjacent to it. are'lugs carrying a cup-shaped collar 6-1into the center.

of which is screwed the inspirator 10ffor the purpose of adjustably supporting the saine and thereby the whole burner struct-ure. The

space between Vflaiige55 and the collar 61,` defined by the length oflugs 60, forms a passage around the inspirator 10` for secondary air to enterk the boiler or furnace through-aperture v58. 62 is a cylindrical shell slidably Vengaging the outside of collar 61 and lugs 60 forming an air register. therewith and being adapted to close entirely the space between collar 61 and flange 55. each side shell 62 has a U-shaped groove 63 ithin which isslidably disposed a head 64 of Ya screw 65, the stem of which travels within an elongated slot 66 in theshell'62.

67 is a yokecoinprising arms 68 and a center collar 69 which is slipped over lever handle 39 and adjustably secured thereto by means of a set screw 70.' 68a are lugs projecting from the arms 68 for thepurpose of supporting the same against lever 38. To

vthe lower enns of the arms 68 is secured by ports 24, past the conically shaped end of the gas spindle 23, through gas outlet 19 into the inspirator 10, there, by reason of its velocity, to draw in atmospheric primary air through inlet 16, which mixes with the gas within'the inspirator 10 and is discharged therefrom at .its outlet end passing into the furnace through aperture screwing down the block 46 from a position ljust below the upper lug 40 to a positionin line with theV fulcrum pin 37, the opening betweenthe conical end of the gas spindle 23 and its seat which is adjacent the` gas outlet 19 of the nozzle 18 canv be adjusted to regulate the amount of gaspassed therethrough from a maximum to minimuml t can readily be noted that with or zero. the block Y46 in its vtop position, when the lever 8S isinoved from a closed to an open position, the link 48 and consequently the gas spindle 23 has its longest travel, while when the block 46 is screwed down tobe/ inV alignment with fulcrum pin 37 there will, be no movement at all of the link 48 and therefore no movement of the spindle 23.

Similarly, when the block 49 is in its top position. the lever link 53, the threaded sleeve 51. thc guide 31 and the primary air shutter 3() have `the longest travel, resulting in the largest air opening,` while with the block 49 screwed down to align with pin 37 there will he no movement of the shutter 3() at all.

62 vor, in other words, the openingor closthereby opening or closing the'air registerV completely, adjustment ofthe air register lying between these two'points.

It is obvious, therefore, that with aunit movement of the lever 3,8, that is at a lixed fullstroke, various adpistinents ofgas and primary air can be had by screwing down Iuthe same manner, the travel of the shell iis more or-less blocks 46 or 49 towards the center of the fulcrum pin 37, and that by raising or lowering yoke .67 the amount of secondary air may be controlled. This makes `possible thecross connecting of a battery oi' burners by connecting all levers of the burners to a motor driven automatic control or tor ether purposes. This can easily be effected because each burner or each set of burners can stillv be adjusted to minimum as Well as maximum flame conditions, but

with a. maximum (constant) stroke of the lever.

Attention is also drawn to the independently adjustable gas regulating spindle 23. This is a vital construction detail because it permits small variations in the assembly of the complete unit, by simply inserting a screw driver into the slot 29 and turning the spindle until the gas opening around its conilal inner end adjacent the gas outlet 19 has been properly adjusted.

Moreover, While the construction shown is particularly applicable to boilers or furnaces with stack draft, it may also be used in combination With similar devices Where no stack draft is available. In suchcase the jet velocity of the flame induces through the register an amount of air Which dependsv upon the combined velocity of the primary air and gas.

Various changes in form, proportions and minor details of construction may be resorted to Without departing from the principle or sacrificing any of the advantages of the invention as defined in the appended claims.

What I claim as new, is: Y

l. A gas burner comprising an inspirator tube having a gas connection, an air shutter at the inlet end of saidtube, a gas valve, operating means for the said shutter and valve and means to obtain variable ranges of adjustment for the said shutter and valve 1n predetermined proportions to each other from zero to maximum with a constant travel of the Vsaid operating means.

tions to each other from zero to maximum during a unit travelv of the said operating means.

3. A gas burner comprising an inspirator tube having a gas connection, an air shutter at the inlet end and an air register intermediate the inlet and the outlet of the said tube, a gas valve, operating means for the said shutter, valve and register, and means to obtain variable ranges of adjustment for the said shutter, valveand register in predetermined proportions to each other from zero to maximum With a constant travel of the said operating means.

4t. A gas burner comprising anv inspirator Vtube having a gas connection, an air shutter at the inlet vend and an airregister intermediate the inlet and the outlet of the said tube, a gas valve, a lever fulcrumed to the said tube adapted to operate the said shutter, valve vand, register, andadjusting means for varying the travels of the said shutter, valveand register independently of and in predetermined proportons to each other from zero to v maximum during a unit movement of the saidv connecting the said spindle and guideto the Y said lever independently of each other for varying the travels of the said shutter and spindle in predetermined proportions to eachv other from zero to maximum during a constantY travel of the said lever. i

6. A gas burner comprising an inspirator tube, a gas nozzle at its inlet, a gas regulating spindle, a gas tube around the said spindle Y having a gas connection, the said spindle proj ecting outwardly of the said tube, a tubular guide slidingly disposed around the said gas tube, an air shutter attached to the said guide and adapted to control vthe inlet of primary air to the said inspiratorV tube, a registerfor the control of secondary air around the said inspirator tube intermediate its inlet and outlet, a lever fulcrumed to the said inspirator tube, and means adjustably connecting the said spindle, guide and register to the said lever independently ofeach other for varying the. movements of said spindle, guide and register in predetermined proportions to each other Vfrom zero to maximum With a ixed movement of the said lever. f

' In testimony whereofl I have hereunto set my hand.

ALBERT MORSE.

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