US1522750A

US1522750A - Hydrocarbon burner

Info

Publication number: US1522750A
Application number: US698577A
Authority: US
Inventors: Frederick H Schulenberg
Original assignee: VAPO STOVE Co
Current assignee: VAPO STOVE Co
Priority date: 1924-03-12
Filing date: 1924-03-12
Publication date: 1925-01-13
Anticipated expiration: 1942-01-13

Description

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F. H. SCHULENBERG HYDROCARBON BURNER FiledMarch 12, 1924 2 Sheets-Sheet l Jan, 13. 1925.

Y F. H. SCHULENBERG HYDROCARBON BURNER Filed March 12, 1924 2 Sheets-Sheet 2 JWM/45,1%@

Patented dan.' 13, i925.

UNH TS iterate atar arca,

FREDERICK E. SCHULENBERG, OF LIMA, OHIO, ASSIGNORTO THE VAE() STOVE COM- PNY, 0F LIMA, OHIO, A CORPORATION 0F OHIO.

HYDROCARBON BURNER.

Application led March 12, 1924. Serial No. 698,577.

To all whom t may concern:

Be it known that I, FREDERICK H. SCHU- LENBERG, a citizen of the United States, and

a resident of Lima, in the county of Allen,

State of Ohio, have invented new and useful Hydrocarbon Burners, which invention is fully set forth in the following specification.

rThis invention relates to hydrocarbon burners vof the class described in my former United States Letters Patent No. 1,411,749, dated April 4, 1922, and has for its objects to improve in several respects on the burner of said patent, whereby to enhance its practicability and commercial value.

A further and important object of the invention is the provision of means in association with the burner, and a part thereof for initially heating the burner for generating purposes instead of using a generating or priming liquid, such as gasoline, for such purpose, as is now the practice.

The invention is fully described in the following specification, and while in its broader aspects it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanylng drawings, in which,-

Figure 1 is a side elevation of a burner embodying the invention, with a part broken away. -Figure 2 is an enlarged central vertical section thereof with a part broken away. Figure 3 is a section on the line 33 in Fie. 2, and Fig. 4 is an elevation of the electrical heating unit for the burner with a portion of the base broken away.

Referring to the drawings, 1 designates an annular Hat base member 1, which is of a ring form and is adapted to be mounted in any suitable manner in a stove or other support. Mounted on the base 1 is a band' 2, preferably of sheet metal, bent in annular form and forming a support at its upper edge for a'trough member 3.

The outer wall of the trough 3 is rabbeted at its upper edge, as shown at 4, to receive the lower end of a frusto-conical shell 5, the upper small edge of which has a ring 6 mounted thereon. A succession of annular series of slots 7 are formed through the shell 0 5, and the material about each of the slots succession of annular series of slots 12, thesame as the shell 5, and these slots have outwardly turned li s 13 at their outer edges or directed into t e combustion chamber A.

rlhe shell 5 is enveloped in spaced concentric relation by a skirt or outer imperforate shell 14, which has its upper end formed with an inwardly projecting annular x flange 15 provided at its lower inner edge at spaced intervals therearound with lugs 16 for resting onthe ring 6 whereby the major portion ot the inner superposed edge of the Hang 15 is spaced from the ring 6, asshown at 1 The inner edge of the ange 15 terminates in substantially vert-ical register with the inner edge of the ring 6 and the lower edge of the skirt 14 terminates adjacent to the lower edge of the trough 3 in spaced relation thereto to permit the upward passage of air therebetween into the air chamber B which is formed between the

shells

5 and 14. A ring 18 is mounted on the upper end of the shell or skirt 14, being supported in spaced relation thereto by a series of lugs 19 on the ring, which lugs have lips 20 depending from their outer edge in engagement with the outer side of the shell 14 to center the ring thereon. The ring 18 preferably slightly overhangs the outer edge of the shell 14, and its inner edge terminates short of the inner edge of the lange 1'5, thereby providing a central opening, which is'larger than the central opening formed by said flange.

The upper portion of the shell 14 is enclosed by a shell 21, the upper portion 22 of which is conically restricted to extend over the adjacent edge of the ring 18 in vertically spaced relation thereto. The conical portion 22 of the shell has lugs 23 projectingA inward therefrom at spaced intervals therearound and resting onthe outer edge portion of the ring vi8 lto support the shell in concentric spaced relation to the ring and shell 14. The shell 21 is also held in position to the shell 14 by bolts 24. The shell-21 cooperates withtthe shell 14 to form an air intensifying chamber C, which is open at its bottom for the ingress `of air and is open at its top for the egress of air. which in its dischargle from the chamber C is directed inwar y over the ring 15 by the inwardly directed conical portion 22 of the shell.

An air discharge cap or head 25 is mounted above the top plate 10 of the perforated cone 9, 'such head, in the present instance, comprising the vertically spaced upper and lower '

plates

26 and 27 which have their outer edges turned toward each 'other and spaced slightly apart by integral lug portions 28 to form the annular air discharge space 29- from "the head between the edges of its plates. The lower plate 27 is pro# vided withfa central opening and is supported at the marginal edge or portion of such opening by an annular outwardly andl downwardly projecting' flange or base member 30 that is supported ,at its lower edge in slightly spaced relation to the top plate 10 adjacent toits outer edge by a Series of v lugs 31 on said top plate, thus providing an air discharge opening 31 between the outer edges of the late 10 and flange 30. The inner air cham er D, to which air is admitted through the base ring 1, is in communication through the openingfll in the top plate 10 with an air chamber E formed by the plate 10 and iiange 30, and thisl latter chamber is in communication j with the interior of the head 25v through the opening 32' in the bottom plate 27 of the head and supporting `flange 30.

The hydrocarbon oil used as fuel forl the burner is fed to the interior .of the trough 3 through a pipe 35, which communicates with any suitable source of fuel supply, and the fuel as it enters the trough 3 is vaporized by thel heat which is generated in the trough by the burner when in action.

One feature of improvement of the present burner -over that of my said former patent is the provision in the outer wall of the trough 3 of an annular series of circumferentially extending slots 36 disposed av short'distance below the upper end of the trough wall .aind opening communication between the interior of the trough and the air chamber B, thereby admitting air from said chamber to the interior of the trough in suiicient quantity to maintain circulation within the trough. It is found in practice that the action of the burner-is Very materially improved by the provision of the slots 36 in the trough wall, as they prevent the possibility of a dead pocket forming in the lower portion of the trough.

In the operation of my improved burner, without reference .to the initial heating means which has not as yet been described,

the'fuel vapor upward from the trough into the combustion chamber. A portion of the air in the chamber B'also passes through the space 17 at the upper end ofsaid chamber into the upper end portion of the combustion chamber and the air, which is heated by passing through the chamber C,

is directed inward through the space be-v tween the ring 18 and flange 15, and also inwardly over the ring 18 to feed the gases of -combustion as they rise from the combustion chamber A. A portion of the air within -the chamber D rises into the superposed chamber E and head 25 and is discharged radially therefrom in a highly heated state through the passages 31 and 29l'therein. It is thus evident that oxygen is fed both outwardly from the interior -of the burner and inwardly from the exterior thereof into the gases of combustion which y rise from the chamber A through the openings or ange '15 and ring 18. It is also evident that the different parts of' the burner become highly heated during operation, so that the air and gas in passing through the different chambers are highly heated; such heat increasing toward the top of the burner. It is foundthat the provision of the outer shell 21 materially improves the action of the burner.

yFor the purpose of initially heating the burner, I provide an electric heating unit which is mounted within the air chamber D and has an electric heating coil or element so disposed as to heat the bottom of the trough 3 and also to heat the shell 9 and surrounding parts from the bottom to the top thereof. This heating unit comprises the band 2 as its base, which band is clamped between the base ring 1 and trough 3 by av plurality of bolts 40 arrangedexternally of the band and has arms 41, preferably of stamped sheet metal construction for the purpose of lightness and cheapness, fixedly projecting inward from to the inner side of the band 2 under the trough 3 and then upward into the adjacent side portion of in the chamber D, one of such portions, in the present instance, being disposed below the trough S, another adjacent to the lower inner edge thereof, another substantially midway of the ends of the arms and another at the upper ends of said arms, thereby distributing the heat from the unit throughout the length of the chamber D and particularly to the trough 8. The apertures 43 are provided with insulating bushings 44 of mica or other suitable insulating material. The terminals of the heating element 42 are connected to binding

posts

45 and 46, carried by the band 2, said posts being adapted to have leads 47 connected thereto.

An electric lighting coil 48, Figure 2, is disposed around the upper portion of the shell 9, preferably in surrounding adjacent relation to the .air discharge passage 31 for effectinga lighting of the burner when the current is on. The coil or element 48, in the present instance, is in shunt connection with the element 42, so that when the current is turned into said latter element a portion of such current passes through the shunt element 48. The element 48 is suitably supported, in the present instance, by fingers 49 projecting outward from the upper end of the shell 9.

I wish it understood that my invention is not limited to any specific construction, form or arrangement of the parts as it is capable of 'numerous modifications and changes without departing from the spirit of the claims. l

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a hydrocarbon burner having a vertical air passage therethrough, a frame secured at its base portion to the burner and having arms rising from such portion into said passage, and an electric heating element carried by said arms and arranged to distribute heat throughout a considerable portion of the passage.

2. The combination with a hydrocarbon burner having a base portion and a. superposed portion, of an electric heating unit disposed within the burner, and having a frame comprising a base nember which is clamped between the base and superposed portions of the burner, arms fixed to and rising from said base member within the burner, and an electric heating element carried by said arms.

3. The combination with a hydrocarbon burner having a base portion and a superposed annular fuel vaporizing trough portion, of a member clamped between said base and trough portions, arms extending from said member upwardly into the burner through said trough portion, and an electric heating element carried by said arms and having portions adjacent to the tro-ugh and -other portions disposed within the burner above the trough.

4. The combination with a hydrocarbon burner having a central air chamber with a laterally directed air discharge passage at its top, and a combustion chamber surrounding the air 'chamber and in communication at its top with said discharge, of an electric igniting element disposed in the combustion chamber around the air chamber and in adjacent relation to said discharge passage.

5. In a hydrocarbon burner, an electric element disposed internally of the burner for initial heating purposes and having a portion disposed within the combustion space of the burner for igniting purposes.

6. The combination with a hydrocarbon burner having an interior air chamber and a combustion space exterior to said chamber, of an electric heating element disposed within the air chamber and having a portion disposed within the combustion space for igniting purposes.

7. In a hydrocarbon burner, an annular fuel vaporizing trough, perforated shells rising from the inner and outer walls of the trough, the inner shell forming an air chamber andthe two shells Vcooperating to form a combustion chamber, a shell surrounding the outer of said perforated shells to form an air chamber open to the atmosphere at its top and bottom, an air discharge head mounted on the inner perforated shell and having provision for the discharge of air into the combustible gases rising from said shells and electrical heatin means disposed within the inner shell and iaving a portion disposed without said head to ignite the gases rising from the shells.

" In vtestimony whereof I have hereunto signed my name to this specification.

FREDERICK H. SCHULENBERG.

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