US2251710A - Gas burner - Google Patents

Description

g 5, 1941- A. P. LIVAR 2,251,710

GAS BURNER Filed Aug. 24, 1938 2 Sheets-Sheet 1 IN VENTOR ALLEN P. LIV/IR- M .1411, 72%

A TTOIRNE Y A. P. LIVAR Aug. 5, 194-1.

GAS BURNER Filed Aug. 24, 1938 2 Sheets-Sheet 2 77 (A'L'A'A'A'LYLVL'L'L AAA A AW A AVMWVAVJKMJ UWUVUUU IN VENTOR ALLEN R LIV/7R A TTORNE V Patented Aug. 5, 1941 GAS BURNER Allen P. Livar, Dayton, Ohio, assignor to Chrysler Corporation, Detroit, Mich., a corporation of Delaware Application August 24, 1938, Serial No. 226,404

2 Claims.

This invention relates to the construction of an improved gas burner having the ability to operate satisfactorily when supplied with any of the common gases used in the diiferent localities throughout the United States. The present bumer will operate perfectly when supplied with manufacturers gas, natural gas or mixed gas. All that is required with the present invention is to change the size of spud through which the gas is fed to the burner and properly to adjust the primary and secondary air shutters for the various gases, whereas other types of burners have required the substitution of various burner heads having different numbers of jets, orifices or burner outlets for use with the diiferent types of gases.

Another object of the present invention is to devise a burner which may be easily manufactured, and which requires but a few parts which are easily and quickly manufactured. Due to the fact that the burner head may be used with any common type of gas, another advantage resides in the fact that one standard burner head may be supplied for all of the difierent localities within the United States whereby dies, machinery, inventory and service parts may be held to a minimum.

The objects and advantages of the invention will be readily understood following an examination of the following specification and the accompanying drawings wherein like numerals refer to like parts throughout.

In the drawings, Fig. l is a partial plan view of a furnace fire box having a burner head of the present invention installed therein; Fig. 2 is a side elevation, partly in cross section, of the apparatus shown in Fig. 1; Fig. 3 is an end view of the apparatus shown in Fig. 1 showing the construction of the secondary air shutters; Fig, 4 is a vertical cross section through the burner head taken on line 4-4 of Fig. 1; Fig. 5 is a similar view taken on line 5-5 of Fig. 1; Fig. 6 is a similar view taken on line 6-8 of Fig. 1; and Fig. 7 is an enlarged plan view of a portion of one of the burner outlet packs.

In the drawings, the numeral Ill refers to the jacket or outer wall of a furnace within which a fire box I l is mounted, the fire box being provided with a suitable plate l2 which may be removed in order to permit the insertion and withdrawal of the draft tube I 3 and burner head H. The draft tube is preferably supported by reason of its attachment to the gas supply tube l5 at one end and by a leg 16 within the fire box. As is usual in burner constructions the gas supply tube I5 is provided with a hand valve 26 by means of which the supply of gas to the draft tube may be manually stopped and started, the valve 28 controlling the fiow of gas through a drilled spud H, the orifice of which is located at the inlet of the draft tube and which may be of various sizes in order to accommodate the various types of gases. In the present invention the spud I1 is the only part which needs to be changed when using the burner for various gases, whereas in other known types of gas burners the number and size of burner head outlets must be different in order to burn various gases. The spud I1 is mounted upon a short tube It extending from the gas supply pipe IS, the outer surface of which is threaded and carries an adjustable primary air shutter l9. By adjusting the shutter l9 toward and away from the throat of the draft tube l3 the supply of primary air induced by the jet action of the gas through the orifice of spud I! may be properly controlled, as is usual in gas burning practice.

- An opening 20 is cut through the jacket ID in order to provide a passage for the flow of secondary air into the fire box II, and the jacket l0 carries adjustably mounted secondary air shutters 2|, the adjustable mounting being provided by the slots 22 and screws 23. The secondary shutters 2| are preferably semicircular, with central notches to receive the throat of draft tube l3, so that the opposed edges of the semicircular segments may be brought together or adjustably moved apart in order to control the volume of secondary air.

The burner head comprises a cast iron body 30 having an inlet collar 3| which is chamfered to receive the tapered upwardly extending neck of the draft tube l3, the head being thereby removably supported by the draft tube. The head is preferably rectangular in shape and is provided with a central gas receiving space 32 from which tapered lateralpassages 33 extend toward the sides of the burner and tapered longitudinal passages 34 extend toward the ends of the burner. Passages 33 communicate with other tapered longitudinal passages 35 parallel to the first mentioned longitudinal passages 34. The number and sizes of the various passages may be altered as ,desired as long as a suflicient number of passages of proper size and shape to distribute gas evenly throughout the body of the burner head are provided. The ends of the longitudinal passages 34 and 35 are preferably connected by lateral passages 36 parallel to the passages 33.

The upper surface of the burner head is fiat and a plurality of slots 31 are cut through the top wall of the burner head above each of the passages 34 and 35, the same providing the outlets for the gas and air mixture from thebumer head.

In order to prevent flash-back of burning gas through the draft tube and to provide a certain amount of Jet action. the'slots I-l carry strip packs comprising a plurality of alternate plain strips 40 and corrugated strips 4|, the strips be- ;ing preferably formed of a stainless chromenickel steel; or similar heat-resistant metal. The corrugated strips 4| are easily formed by rolling a plain strip between simple corrugating rolls, after which a pack of plain and corrugated strips may be formed. out to length. and inserted into the slot 31. In order to support the pack of strips. the burner head may be provided with a plurality of inte rally cast rid 42 extending across the centrally disposed portions of the slots 31, and the ends of the packs of strips are supported by the end wall 43 of the burner head. The packs of strips may be retained in position by a flanged retainer strip 44 held to the end wall 43 by screws 45. Each strip is loose with respect to adjacent strips and the sides of the slots, and is preferably slightly shorter than the length of slots 31 in order that a limited degree of expansion and contraction may be accommodated. It is to be noted that the corrugated strips 4| are formed with the corrugations extending substantially at right angles to the longitudinaledges of the strips, so that the corrugated strips need not be oriented as would be the case if diagonally corrugated strips were used, and so that the flow of gas is vertical. It is also to be noted that the construction may be readily assembled since the corrugations of one strip need not be aligned in any respect with the corrugations of adjacent strips.

The burner head is preferably provided with a mounting for a pilot burner 50 and safety control device 5!, as is the usual practice in gas burning.

The present invention is characterized in operation by the formation of a uniform, clearblue, inner cone and a uniform, clear-yellow Having described the preferred embodiment of my invention it should be apparent to those skilled in the art that the invention may assume other shapes and embodiments. All such modifications as come within the scope of the following claims are considered my invention;

I claim:

1. A gas burner head of substantially rectangular shape comprising a central distributor space, laterally extending, outwardly tapering distributor passages communicating with said distributor space, and a plurality of longitudinally extending, outwardly tapering passages vcommunicating with. said distributor space and distributor passages, said burner head having a plane surface through which a slot extends above each of said longitudinally extending passages, a pack of alternate flat and corrugated strips of heat-resisting metal laid on edge in the con-' fines of each of said slots, said strips being unsecured to each other so as to be free to move with respect to each other and being unsecured to the burner head so as to be free to move with respect to the burner head, and pack retaining members extending across said slots above and below the edges of said strips and between which said strips may move longitudinally with respect 1 to each other and to the sides of said slots, certain of said retaining members comprising in-' tegral bridges extending across the lower edges of said slots intermediate of the ends thereof to support the centrally disposed portions of said packs.

2. A gas burner head of substantially rectangular shape comprising a central distributor space, laterally extending, outwardly tapering distributor passages communicating with said distributor .to be free to move with respect to each other and being unsecured to the burner head so as to be free to move with respect to the burner head, and pack retaining members extending across said slots above and below the edges of said strips and between which said strips may move longitudinally with respect to each other and to the sides of said slots, certain of said retaining members comprising integral bridges extending across the lower edges of said slots intermediate of the ends thereof to support the centrally disposed portions of said packs and a pair of said retaining members comprising flanged bars fastened to the end edges of said burner head with the flanges thereof extending over the ends of said packs, said packs being shorter than said slots so that said strips may be'free to expand longitudinally bev tween said flanged members.

ALLEN P. LIVAR.

Images