US1412767A - Gas burner - Google Patents

Description

mimmo W. J. BARBER.

GAS BURNER.

APPUCATION FILED MAR. B, 1920.

Patented Apr. M, 1922.

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Wj- BARBER narran wrnnrnlirfa. Brianna, or CLEVELAND, onto, assis-Non or onnfrranr 'ro EDWARD M.

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To all/whom# may concer/n.:

Be it known that I, WILLIAM J. BARBER, a citizen of the United States, residing at Cleveland, in the county kof Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Gas Burners, of which the following is a specification.

This invention relates tojgas burners and more particularly to a supply nipple having a gas orifice of special form adapted to discharge the gas on diverging lines and in a circle to entrain a large amount of air and to maintain the same proportionate admixture of air with the gas under varying pressures, all substantially as herein shown and described and more particularly pointed out in the claim.

In the accompanying drawings, Fig. l is a sectional view through a gas burner embodying my improved nipple. Fig. 2 is an enlarged view of the gas nipple in section and having` a separate tip or plug therein constructed' according to my invention. Fig. 3 is a plan view of Fig. 2. Fig. 4: illustrates the invention embodied in a gas valve adapted to be, attached and used with a gas burner, for example, the burner shown in Fig. l.

The invention comprises a separate tip or plug member: 2 having a central orifice 3 of relatively small diameter bordered or surrounded by a sharp edge 4 which is sharp or of contracted length in contra-distinction to being long or elongated and to prevent gas under pressure from being discharged in an attenuated stream. My object is to create a jet of gas which will flare or spread in a circle on conical lines immediately as it issues under pressure through orifice 3 and this result is effected by reducing the length of the orifice to a minimum and by having a converging entrance 5 leading to orifice 3 and by providing a flaring cavity G at the discharge side of the orifice. Furthermore, I prefer to make the converging entrance relatively long with the walls at an acute angle to the axis, and the outer cavity 6 relatively shallow with its walls at. an obtuse angle to the axis. The orifice S-in a small gas burner would be of a diameter corresponding to a No. 54 or 58 drill but this orifice may vary in diameter and in making it larger the entire tip would be made longer to obtain the same conical spreading eect for the jet of gas.

Gas riparian.l

Specification of Letters Patent. 'Pa-tenttll plrllll, Application filed March 8, 1920. Serial No. 363,984.

In general, the idea is to limit the amount of gas discharged and at the-same time cause it to, spread on conical lines so that as it will be jetted over a widening area or circle and whereby a large volume of air will be drawn into and upward with the gas to promote a better and more uniform mixture, and with a-largerv percentage of air than could be or would be obtained by merely jetting the gas upwardly in a fine elongated or attenuated stream. In other words, this flaring jet of inverted cone shape carries in and mixes a larger percentage of air with the gas than a round attenuated stream of gas, and as the pressure of the gas varies the shape of the cone changes automatically and induces a proportionate change in the amount of air drawn in with the gas so that the burner will operate at a very low pressure and give a blue green flame.

The tip or plug member 2 is a relatively small cylindrical piece of metal, preferably brass, and is of slightly tapering form exteriorly to afford a tight wedging fit when driven into a round opening such as I provide in the outer end of the screw-threaded nipple 7, see Fig. 2, which view is magnified ormuch larger than the actual device. This nipple has a central enlargement 8 with wrench-engaging faces and its lower end 9 is also screw-threaded to connect with a supply pipe, not shown.

rlhe nipple and its tip, or the tip alone, may be fixed and used in any gas burner, and one disclosure of such use is shown in Fig. l and which burner is also of my invention, and more fully and completely described in another application filed concurrently herewith Ser. No. 363,985 as hereinafter particularly noted. Briefly, the burner shown comprises a disk-shaped body l0 having a cylindrical extension 11 at its bottom which is provided with air openings 12 .in its side wall and also a closed bottoni 100 into which the nipple member 7 is screwed. An annular flange 14 extends upwardly from body l0 and a finely woven wire screen l5 surrounds and covers the body and is clamped in place by a ring 16. A separate 105 round spreader plate 17 is supported above the central open portion of body 10 and this plate supports and sustains the central portion of screen l5. In operation, the gas issuing from orifice 3 flares or spreads in a 110 circle and strikes the bottom side of spreader plate 17 Which deflects it laterally and distributes it uniformly to the annular burner chamber beneath the screen.

In Fig. 1, I show a screw nipple 2 constructed according to my invention and mounted Within the screw-threaded nipple end of a gas valve G. The gas is discharged from the nipple end oi this valve in the same Way as shown in Fig. 2, and entrains the air in a mixer in the same Way as indicated in Fig. 1.

In this connection reference is made to my (zo-pending application Ser. No. 363,985, filed March 8, 1920, and particularly to th burner top illustrated in Fig. 1.

What I claim is:

In a gas burner, a nipple member having Cuyahoga and Stateof Ohio, this 1st day of March, 1920. l WILLIAM J. BARBER.`

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