US1741532A

US1741532A - Combination gas and oil burner

Info

Publication number: US1741532A
Application number: US116143A
Authority: US
Inventors: Albert W Morse
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-06-15
Filing date: 1926-06-15
Publication date: 1929-12-31
Anticipated expiration: 1946-12-31

Description

Dec. 31, 1929. A. w. MORSE 1,741,532

COMBINATION GAS AND OIL BURNER Filed .nine 15. 192e Bf WMZ/#Maw A TMR/v5 Y Patented Dec. 31, 1929 UNITED `STA ALBERT w. MORSE, or LONG ISLAND CITY, New YORK COMBINATION GAS Application filed .Tune 15,

This invention relates to improvements in fuel burners and more particularly to burners of the kind which are adapted to use either liquid fuel or gas and more especially to burners of the externally mixing, low pressure air type, viz burners in which the fuel and the air do not meet until they are ejected from the burner.

A burner of this kind is illustrated in the Patent #1,406,238, issued to Stevenson andl Bathgate, on Februarylll, 1922, and it is one of the objects of the invention to provide a burner of this type with an improved gas nozzle which discharges the gas into the air issuing from 'the burner in such a way as to` cause a better mixture than heretofore; another object is to `provide a wider as well as freer burning flame; a further object is to use lower air pressureand obtainvan even greater intensity of flame than that obtained with former constructions using considerably higher air pressures; a stillfurther object is to enable the gas burner to be operated on natural draft only with excellent result, where alower temperature flame is desired. Other objects of the invention will appear in the following specification in vwhich a preferred form of the fuel burner is described. The invention is illustrated by the aid of the accompanying drawings in which- Fig. 1 is a vertical longitudinal sectional view of the burner;

Fig. 2 is a transverse cross sectional view taken along the plane of line 2-2 in Fig. A1;

Fig. 3 is an enlarged fragmentary longitudinal sectional view of the gas nozzle of the burner and its adjacent parts;

Fig. 4 is a plan view of the nozzle; and

Fig. 5 is a view similar to Fig. 8, showing a modified construction of the nozzle.

Like characters of reference denote similar parts throughout the several views and the following specification.

Y 10 is a cylindrical casing of substantially L shape; its shorter branch 11 is threaded interiorly to receive an air supply pipe 12. The terminal of the longer branch 13 of casing 10 is threaded exteriorly at 14. A tubular chamber 15 formed by wall 16 extends through the casing 10 in axial alignment with AND OIL BURNER 1926. Serial No. 116,143.

its longer branch. Wall 16 connects the chamber 15 with the outer wall of the casing 10v opposite its shorter branch 11 and is threaded interiorly for connection with a gas supply pipe 17.-

Casing 10 is bored out, adjacent to branch 11, to receive an oil spindle 18. This oil spindle is of hollow construction, being provided with a central duct 19, and extends through the tubular chamber 15 in central alignment therewith. 2O is an enlarged outer end of spindle 18 threaded internally toreceive a spray plug 21 of the usual design employed with. the low pressure, externally atomizing, oil burner. 22 isv a nozzle cap screwed onto the exterior of the wall 16 and contacts with the spray plug 21, thereby forming a closure for the tubular chamber 15. Cap 22'is provided with a central opening 23 and deflecting faces 24. 26 are 'a number of drilled openings through cap 22. These openings are drilled radially i. e. their axes converge to a common center within the burner and are, in other words, diverging outwardly from the axis of the burner outlet, and vthey are further, preferably, arranged in two or more circular rows and in staggered relation to `each other. 27 is a cap adapted to screw onto the threaded end 14 of branch 13 of casing 10, which cap is provided with a central and circular opening 28 and with lugs 28 to facilitate screwing the same onto theV threaded part 14. s Y

29 is a reduced portion of foil burner spindle 18,' projecting outside of the casing 10, and is threaded exteriorly to receive a needle valve 30 of standard construction, a. spindle 31 of which controls a port 32 through whichoil is admitted intoduct 19 of spindle 18, sup'- plied through a pipe 38. In Fig. 5 is shown a nozzle cap 22 essentially of the same construction as cap 22,r having a central opening 23, deflecting faces 24, and radially disposed outlets 26. In addition thereto I have provided this capwith an annular projecting flange 25 around the extreme outer edge of faces 24 for the purpose specified hereafter. Y

' The operation of the device is as follows: Oil is admitted, as is usualwith oil burners of this class, through supply pipe 33 and needle valve 30, whence it passes through duct 19 and through burner nozzle or spray plug 21 out at the Jfront end of the burner, where it mixes with air'under low pressure, forced into the casing 10 through pipe 12, which pipe is of relatively large diameter necessary to supply sufficient oxygen for perfect combustion. This air is deflected by means of cap 22 and more particularly faces 24 coacting with inner wall 27a of cap 27 towards the spray of oil issuing from spray plug 21.

Should it be desired to change the fuel from oil to gas, the oil control valve 30 is closed and the gas supply valve (not shown) is opened. Gas then passes through the pipe 17 into the chamber 15 whence it issues through the openings 26 of cap 22, out at the front end of the burner. By means of the radially disposed outlets 26 of the nozzle cap 22, the gas is discharged into the air from the burner away from the center of the flame, which careful experiments have shown to result in a better mixture and a larger and freer burning iiame. Owing to more rapid combustion I obtain a higher intensity of flame than heretofore. By the use of the modified construction shown in Fig. 5, the gas at its outlet is protected from the velocity of the air and the resistance to the flow of gas is thus reduced, permitting the use of lower gas pressures, or higher air pressures. Owing to the wide dispersion of the gas away from its center, the gas burner may be operated on even natural draft only, where a flame of relatively low temperature is satisfactory, because little pressure is needed to thoroughly mix with the gas jets divergingly discharged from the nozzle outlets 26. Particularly good results are obtained by increasing the number of circularly disposed outlets and decreasing the size of each outlet for the obvious reason that in this manner the gas is broken up and its jets directed into the air from the burner in line streams to be still further broken up individually very easily.

lIt is obvious that the oil and gas features of this burner are entirely independent of each other, and that the fuel can be instantly changed from oil to gas should such exigency occur.

'Should it be desirable to discharge an extraordinarily large volume of gas, it will be noticed that by slightly unscrewing the central cap 22, opening 23 will serve as an auxiliary gas passage for that purpose. Moreover, the central opening 23 in the cap 22 may be omitted entirely and the burner operated as a gas burner only, and if desired, the struc ture of the casing of the burner varied accordingly. Furthermore, while I have shownand described the outlet ports to be radially disposed, I do not wish t-o limit myself to this particular arrangement, but any disposition of ports which causesjets of gas to bedisprincipleor sacrifcingany of the advantages of the invention as defined in the appended Y claims.

What I claim as new, is:

1. In a fuel burner, a liquid fuel supply pipe extending through the burner, a gas chamber surrounding the said liquid fuel supply pipe, a spray nozzle at the terminal of the fuel supply pipe, a cap contacting with and enclosing the said spray nozzle and serving as a closure to the said gas chamber having a number' of circularly disposed ports'having their axes inclined to common centers, adapted to discharge diverging jets of gas-at the outlet end of the burner, and means, independent of the said liquid fuel supply pipe, to admit gas to the said chamber.

2. In a fuel burner, a liquid fuel supply pipe extending through the burner, a gas chamber surrounding the said liquid fuel supply pipe, a spray plug at the terminal of the liquid fuel supply pipe, an adjustable cap serving as a closure to the said gas chamber and contacting with .the said spray plug, the said adjustable cap being provided with a central opening and a number of circularly disposed other openings having their' axes `inclined to common centers, the latter adapted to discharge gas in diverging jets at the outlet end of the burner, and means at the outlet end of the burner to deflect air against the said jets of gas.

In testimony whereof I have hereunto set my hand.

ALBERT I/V. MORSE.