US2708434A - Oil burner and stove - Google Patents

Description

May 17, 1955 H. E. NELSON 2,708,434

OIL BURNER AND STOVE Filed NOV. 4, 1949 2 Sheets-Sheet l Bf-:ff/ 50 May 17, 1955 H. E. NELSON OIL BURNER AND sTovE 2 Sheets-Shea?. 2

Filed Nov. 4, 1949 mu-g (ttorneg OIL BURNER AND STOVE Henry Elias Nelson, Everett, Wash.

Application November 4, 1949, Serial No. 125,496

1 Claim. (Ci. 126-44) This invention relates to oil burners, and it has reference more particularly to an oil burner that is especially designed for use in those types of stoves known as Skippy stoves, and which are used quite extensively for heating and cooking on small fishing boats. However, .it isnot the intent that the present burner shall be limited 1n its use to any particular type of stove but that it shall be used wherever applicable.

It is the principal object of this invention to provide an oil burner that is especially useful in stoves of the above stated character; that may be easily and readily applied to various makes of stoves already in existence without requiring the stove structure to be altered in any material way; that is exceptionally effective and eicient in its use; that is relatively inexpensive to manufacture and can be sold at low cost.

lt is also an object of this invention to provide a novel form of control valve for an oil burner of this character, wherebyV ow of oil to the burner pot may be definitely established and the rate of ow visually noted.

A further object of the invention is to provide a burner comprising relatively few parts, together with an adapter plate that makes possible a ready application of the burner as a unit to the stove with which it is to be used.

Other objects of the invention reside in the details of construction of parts embodied in the burner, and in their relationship and mode of use, as will hereinafter be fully described.

In accomplishing these and other objects of the invention, I have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings, wherein- Fig. l is a perspective View of an oil burner, embodied by the present invention, as applied to a Skippy stove; a part of the front wall of the stove being broken away for better understanding of the disposition of the burner.

Fig. 2 is a top view of the burner and the adapter plate, as assembled therewith; a portion of the cover plate of the adapter plate opening being broken away to show an interior portion of the burner pot.

Fig. 3 is a front elevation of the burner and adapter plate in assembled relationship.

Fig. 4 is a cross-section, taken on line 4-4 in Fig. 2, showing the interior of the burner pot, and a cross-section of the oil feed regulating valve.

Fig. 5 is an enlarged vertical section of the oil feed valve, as seen on the line 5-5 in Fig. 2.

Referring more in detail to the drawingsln Fig. l, I have, for purpose of better understanding of use and mode of application of the present burner, shown it as applied to a well known type of stove. The stove is designated in its entirety by numeral and it is shown with the fire box top removed and a portion of the front wall of the stove body broken away. In Fig. 4, the front wall of the stove is designated at 10x and it is there shown to be formed with a front opening 11. This opening, in a coal or wood burning stove would be equipped with an ash door. In the present instance the 2,708,434 Patented May 17, 1955 'ice door has been removed for the application of the present burner. Also, it will be explained, that the grate with which such stoves are usually equipped to adapt the stove for the burning of coal or wood, has been removed and in its place, the present adapter plate 12 has been applied, as best shown in Fig. l.

The adapter plate 12 is of rectangular form and is of such dimensions that when applied as shown in Fig. 1, it will supportingly engage at its ends with corresponding walls of the stove body and will thus be held in proper position. If desired or necessary, the joints between the side and end edges of plate and stove body may be sealed with a suitable cement. In the present instance, the opposite end portions of the plate are somewhat downwardly offset from the plane of medial portion, and the medial portion is formed with a centrally located andsubstantially circular opening 14, over which a flame ring 15 is removably disposed, the ring having a greater diameter than that of the opening 14 and being adapted to be retained centered over the opening 14 within an upstanding bead 16 formed on the top of the plate 12, as noted in Figs. 2 and 4. The ring 15 is formed with a centrally located flame ring opening 17 which is'about one-half the diameter of opening 14.

Supported fromand located below the plate 12, is the burner pot or bowl 2). This bowl has a flat bottom 20a and slightly outwardly inclined side walls 20h, as will be noted in Fig. 4. The pot, as used in the type of stove shown is about the size of a coffee cup, and its diameter across the top, is substantially equal to the diameter of the opening 14. The pot is rigidly supported from the plate 12 by four screw bolts 22, that are extended downwardly through plate 12, at equally spaced distances about the opening 14, and are threaded through ears 24 that project'outwardly from the side walls of the pot as shown.

in Fig. 3. The pot is so fixed by the screw bolts that its top edge is slightly spaced below the bottom surface of plate 12, thus providing an air passage for inflow of air therethrough beneath plate 12 and flame ring 15 to plateopening 17 as indicated by the arrows in Fig. 4.

On the under side of the plate 12 and surrounding the opening 14 therein, are evenly spaced and downwardly extending baffles 26. These extend across the space between the plate 12 and top edge of the pot, thus to define a series of definitely located passages for the inflow of air across the top of the pot to the flame ring opening 17. These passages are designated at Fig. 4 by reference numeral 28.

Leading downwardly and through the side walls 2Gb of the burner pot 20, from near the top edge of the pot, are air ports 30. These are located in alignment below the passages 28, as noted in Fig. 4, and provide for a downflow of outside air into the pot and to the flame as the oil burns in the pot.

Fuel oil is supplied by gravity ow to the burner from a source of supply not shown, through a supply pipe which is designated herein by numeral 4t). This pipe leads to a regulating Valve 41 and from this valve a relatively large pipe 42 leads into the base of the pot, as best shown in Fig. 4. The valve 41 as seen in Figs. 4 and 5, comprises a housing, formed with a horizontal channel 45 with which the supply pipe 40 connects. Formed in the channel is a conical seat 47. A needle valve 4S is threaded into the housing and has a tapered end that is adjustable from and toward the seat to regulate the flow of oil from passage 45 to a downwardly opening outlet channel 49. The valve housing 41 is mounted in the upper end of a cup and is secured therein by screws 51 as shown in Fig. 4.

The pipe 42 leads from the base of cup 50 to the burner pot as seen in Fig. 4. By an adjustment of the needle valve 48, through the mediacy of its handle portion 48x.

the rate of llow of fuel oil may be very accurately controlled, and this rate of llow from channel 49 may be visually observed through a sight opening 56 in a side portion of the valve housing 51 whereby the valve is mounted in the cup. To prevent free rotation of the needle valve a coiled spring 58 is applied under cornpression about the valve between the handle part 48x and valve body as noted in Fig. 5.

To protect the valve 41 from heat of the stove, a shield or plate 60 is fixed by one of the screws S1 to the valve at its inside as noted in Figs. 3 and 4.

It is shown in Fig. 4 that the top surface of the ame ring 15 is slightly crowned. Also, it is seen that the under surface of the flame ring is Hat and is formed, concentrically about the opening 14 with a relatively wide, downwardly facing annular channel 65. This channel has a transversely rounded surface which operates to effect a downward deflection of air currents as they pass thereover to the flame ring opening 17, this deflection being beneficial to mixing, burning and life of the flame ring 1S.

To use a burner of this kind, it is rst required that the Valve 41 be so adjusted as to admit a small amount of oil to run therefrom, through cup 50 and pipe 42 into the burner pot 20. This oil is ignited and allowed to burn to heat up the pot. If necessary a piece of paper may be crumpled and pushed into the pot through the llame ring opening 17 and ignited. As soon as the pot has become heated, then the needle valve is adjusted to allow the oil to slowly drip into the cup, from which it will ow to the burner pot, and be converted to gas that burns with high heat as it emerges from the flame ring opening 17.

A feature of this invention resides in the fact that by reason of the provision of the opening 56 in the valve wall and the use of a pipe 42 of substantial diameter, air will be fed into the pot through pipe 42. This not only keeps the pipe 42 cool and prevents the gassifying of oil therein, but also feeds air to the ame in the base of the pot and reduces carbon deposits to a minimum.

The burner may be easily opened up for inspection and cleaning. It may be easily applied 'or removed and is relatively inexpensive both in original cost and in operation.

Adapter plates may be made of such size and shape as to adapt the burner for use in stoves of different designs.

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

ln combination, an oil burner unit and a stove having a rebox formed with downwardly converging opposite walls and having an ash door at the bottom thereof; Said oil burner unit comprising a horizontal adapter plate contained in the lirebox and supported therein above the ash door level by engagement of its ends against the converging walls of the frrebox, an upwardly opening pot of cup-like form attached to the said adapter plate at the under side thereof and spaced slightly therefrom thus providing an air passage between them; said pot having an opening leading into the base thereof, an oil supply pipe extended through the ash door of the stove and threaded into said opening; said adapter plate having an opening therethrough directly above the said pot and substantially of the same diameter as the pot, a flame ring removably disposed on the plate over said plate opening and formed with an opening therethrough centrally above the pot and of lesser diameter than the pot, said ring being formed about the opening thereof with an annular, downwardly facing channel exposed within the plate opening and transversely curved to effect the downward deflection of air flowing thereacross to the llame ring opening.

References Cited in the le of this patent UNITED STATES PATENTS 928,620 Wright July 20, 1909 960,563 Latil June 7, 1910 2,120,372 OHagan June 14, 1938 2,131,835 Chadwick Oct. 4, 1938 2,168,859 Bergey Aug. 8, 1939 2,218,154 Ramsey Oct. 15, 1940 2,311,570 Pyle Feb. 16, 1943 2,337,734 Breese Dec. 28, 1943 2,367,038 Martin lan. 9, 1945 2,369,999 Behrendt Feb. 20, 1945 FOREIGN PATENTS 853,208 France Nov. 28, 1939

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