US2256305A - Burner construction - Google Patents

Description

Sept. 16, 1941. A. J. YEAGER BURNER CONSTRUCTION Filed July l5, 1938 INVENTOR.

' QkZZO/z J7 ATTORNEY 5.

Patented Sept. 16, 1941 BURNER CONSTRUC TION Anton J. Yeage Wisconsin Rap ids, Wis, as

signor to Prentiss Wabers Products 00., Wisconsin Rapids, vWis., a corporation of Wisconsin.

ApplicationJuly 15, 1938, Serial No. 219,323 rol -1m. (01. 158-42) This invention relates to a new and improved liquid fuel burner and more particularly to a burner adapted for'llSe with the less volatile liquid fuels such as kerosene or the like.

It has heretofore been generally customary to use liquid fuels such "as gasoline, with camp stoves or other cook stoves or heaters, which vol atilize the liquid fuel and burn it as a gas. This is for the reason that it requires considerable heating in a generator tube or equivalent chamber to volatilize kerosene or less volatile liquid fuels to an extent adequate for sustained and efficient combustion as a gas. In some cases, as for example in my copending application, Serial No. 125,566, filed February 13, 1937, I have shown a construction in which gasoline or similar fuel is used to preheat the main burner to an extent sufficient to volatilize kerosene or the like, after which the continuous use of the burner is with kerosene as its fuel. These burners designed for starting with one fuel and continuing combustion with another, involve complications in that they require separate tanks or a divided tank, and multiple fuel passages. They are also undesirable in that they require the user to provide two fuels. In addition, they lose one of the advantages of the kerosene burner in that it is necessary for the user to have in the stove a small quantity of the more volatile and more dangerous gasoline.

It is an object of the present invention to provide a construction which utilizes kerosene or similar fuels, both for preheating and for continuous combustion.

It is a further object to provide a preheater burner suitable for use with heavier fuels which may be lighted by a match without delay.

It is an additional object to provide a construction of this character which is simple in design and operation and adapted for commercial production and use.

Other and further objects will appear as the description proceeds.

I have shown a preferred embodiment of my invention in the accompanying drawing in which- Figure 1 is a fragmentary plan view of a liquid fuel stove with my improved preheater burner associated therewith;

Figure 2 is an enlarged sectional view of the preheater burner;

Figure 3 is a view of Figure 2 as seen from the right, with the valve in closed position; and

Figure 4 is a view similar to Figure 3 but with the valve in open position.

' Referring first to Figure 1, thermain burner generator tube. II is supported from the member 12 .and. provided with a valve controlled by means of the handle l3. The liquid fuel. is introduced into the generator tube throughthe pipe M. The fuel is discharged from the generator tube into the mixing passage l5, which turns down under-the generator tube II at- |6. This portion lfi ofthe mixing tubeis provided with the burner openings "and Hi; The end of the mixing tube |B discharges into theimanifold Iii-which is connected to suitable types of burners, not shown. I

The preheater burner-construction includes a burner body 20 which is provided with a liquid fuel inlet 2| and an air inlet 22. The burner body 20 contains the liquid fuel passage 23 which is surrounded by the air chamber 24. The passage 23 is provided with the small radial opening 25 which communicates with the air chamber 24. The liquid fuel inlet 2| communicates with the fuel passage 23 and the air inlet 22 communicates with the air chamber 24 at a point out of alignment with the small air port 25. The

passage 23 discharges through the fiat face 26 of the burner body. The burner body is provided with the lug 27 through which passes the rod 28 carrying the funnel-like member 29 which serves to direct the flame and products of combustion from the preheater burner against the generator tube II. The rod 28 is held in the lug 21 by the set screw 30.

The valve shaft 3| is journalled in the burner body 20 and has a cross arm 32 keyed to its end by means of the flattened portions 33 of the end of the shaft and the cotter pin 34. One end of this arm 32 has threaded therein the pointed set screw 35, the point of which enters a conical seat 36 in the valve closure member 31. The second end of the arm 32 is provided with a slotted opening 41 through which passes the stop member 38. This stop member 38 extends from a supporting member 39 which is secured to the lug 40 extending from the burner body 20. The

thrust washer 4| is fitted about the shaft 3| and j bears against the burner body 20. The coil spring 42 is also fitted about the valve shaft 3| and is held between the thrust washer 4| and the second thrust washer 43, which latter is held in place on the shaft 3| by means of the pin 44. As shown in Figure 1, the shaft 3| is provided with an operating handle 45.

In the use of the device, liquid fuel, such' as kerosene, is supplied to the passage 23 through the inlet 2| and air under pressure, normally drawn from the air in the fuel tank above the fuel, is introduced into chamber 24 through the inlet 22. This air enters the fuel passage 23 through the small port 25 and mixes with the liquid fuel. The handle 45 is turned in a counterclockwise direction to open the port in the flat face 26 of the burner body by moving the valve closure 31 to the position shown in Figure 4. A mixture of air and atomized fuel discharges from the port and may be ignited by means of a match. The flame and products of combustion are directed by the member 29 against the main generator tube ll of the burner. After the generator valve has become heated, the main fuel valve l3 may be opened and the fuel will be gasified by the hot generator valve. As soon as the main generator burners I! and i8 ignite, the generator valve handle 45 may be turned to close off the preheater by closing the valve and bringing it to the position shown in Figure 3. The flame from the preheater may be directed against the generator adjacent themain heater burners l1 and [8 so that the ignition of these. burners will :take place automatically and when they are ignitedit is .a signal to the operator that. thepreheater burner may be turned off.

i The spring 42. serves to hold .e valve closure 31 firmly against the. flat face 26 of the preheater burner body. Its universal connection with the arm 32. permits the valve. closure to adjust itself to seat in a manner to make a, perfect closure of the preheater bnrn n. The arm. 32 ope at s to give a balanced pressure against the yalve closure 31 by reason of th iact that. the oppos te end of the arm 32 bears a ainst the supporting. memher 39. The slotted opening 41 serves to limit valve movement to that necessary to properly close or completely uncover the discharge end of the fuel passage 23.

The small rod 28 which carries the funnel-like flame directing member 29 is important in that this small connection minimizes heat transfer between the member 29 and the burner body so that expansion of parts or variable preheating of the mixture in the burner body is reduced and a more uniform combustion is assured.

While I have shown a preferred embodiment of my invention it will be understood that it is capable of change and modification to meet varying conditions and requirements and I contemplate such variations as come within the spirit and scope of the appended claim.

I claim:

A liquid fuel burner comprising a burner body, the body having an axially extending cylindrical chamber ther in. sai chamb r h in aredu d p rti n extendin to t e di cha ge fac o ...th burner body, a tube constitutingafuel passage n in axi lly hrou h th ham er and fi in cl se y in'the redu ed po tion of the a b r, sa dtu e havin a radi l yex e d g p ing intersecting the axial opening therein, means f tr duc n f e into th ub and for closing th rear end of th cylind cal chamb r, t urner body having an air nlet op g therein communi atin with the lateral wal c v th cylind ieal ham e at a p int o t of alignmen th the radia o en in h fu l tub-en

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