US1679633A - Oil burner - Google Patents

Description

Aug. 7, 1928. 1,679,633

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OIL BURNER Filed Jan. 21, 1926 f, 34 ff; ///f/O l;

Il-NyENToR y /W//W//x. 7 4:/ ,II/,lll l ATTORNEY Patented Aug. 7, 1928.

UNITED@ STATES WILLIAM I..l SIX, or KANSAS CITY, MISSOURI.

oIL BURNER.

n Appnaauon mea January 21,' 192e.v` saria1 Na. 82,699.

My invention relates to oil burners and more particularly to an open retort burner to which oil is fed by gravity and 'there vapor-ized and miXed "with air for supporting combustion, the principal object of the invention being to adapt a burner of this type for thermostatic control by eliminating the usual tendency of the burner to smoke or extinguish at low heat or when operating only at pilot capacity.

It is also an object of the invention to provide a burner of this type wherein a steady and even supply of vapor maybe maintained regardless of the feed.

In accomplishing these and other objects of the invention, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings whereim" l Fig. 1 is a Verticahfsectionalperspective View of a burner embodying my invention.

Fig. 2 is a detail perspective view ofthe burner, showing the several parts in spaced relation.

Referring more in detail to the drawings,

1 designates a lire bowl comprising a concavo-coi'ivei; bottom 2 andan upstanding peripheral wall 3, the latter having an out wardly and upwardly'sloping edge flange 2li, provided withlegs 5 for supporting the lire bowl from the grateor other support in the furnace in which the burner is installed, the legs 5 being preferably'integral with the lire bowl and providedrwith outwardly extending feet 6 having'threaded bosses 7 carrying screws 8 by which the fire bowl may be leveled upon its support.

Cast concentrically with thebottom of the fire bowl is an upstanding boss`9 internally threaded as at 10 to receive a pipe 11 through which oil is supplied to the lire bowl, the supply pipe being provided with a control valve 12 by which flow to the burner may be regulated,

Located concentrically of and above the fire bowl is a vaporizing plate 13, having a ring boss 1li on its under face provided with ra dial ribs l5, which support the plate from the bottom of the fire bowl and space the plate from the bowl to form an oil reservoir 1G and channels 17, 'through which oil may pass` from the reservoir. n n

The vaporizing plate 13 is centered on the fire bowl by downwardly projecting lugs 18, preferably integral with the plate and of such length and arrangement as to surround and engage the upstanding boss 9 on the bottom of the bow i,

Il-have found that by maintaining a pool of oil in the yreservoir and drawing supply for vaporization' from the pool instead of generating it in a coil or feed pipe, I am able to maintain a steadier andl more uni-k` form flame, and that by generating in a wick there is less tendency of the ,flame to become extinguished` than when .drawing vapor directly from the body of oil. C on sequently, I separate the reservoir from the combustion chamber by the vaporizingplate 13 and insulate the vaporizing plate by a plate 19 of substantiallylthe same diameter as the vaporizing plate and spaced therefrom by a do'wnturned edge flange 20 on the insulating plate to kmaintain a dead air space 21 between the plates. p

AThe insulating plate 19 vaporizing plate by aboss 22 cast integral with the vaporizing' vplate and received in an opening 23 in the center of the insulating plate. f

The' wick before vreferred to constitutes a ringf24 which lies on the bottom of the fire bowl close about the edge of the vaporizing plate to receive' oil orfvaporllowing out through the channels17, or bycapillaryattraction from the reservoir 16.

The burner is enclosed by a ring 25 supported on a ring plate 26 carried by the furnace -grate (not shown) and spaced from the fire bowl to provide an air passageway 27, the ring being notched, as' at 28,'to re.-

is centered on the ceive the supporting legs y5 of the firebowl, y .i

-m'aintain the ring in position and ypermit itV to rest firmly upon its support.

In order that'fcombustion supporting air:

may be deliveredffrom the passageway 27 downwardly and inta thin layer over 4the wick, I provide a deflecting ring 29 which is supported from a flange 30 cast on the inner surface of the ring, near its upper edge, the ring being provided with a downwardly and inwardly sloping "flange 31 which is spaced from the fire bowl flange 4- to provide a Venturi outlet 32 so that air passing through the Venturi outlet not only mixes with the vapor to forma proper feed mixture, but also drives the flame to the center of the fire bowl, insuring a thorough of the air and vapor.

. The burner is covered `by a plate 33, pref# erably of refractory material andsupported centrally over the topof the fire bowl by comminglingl lll) legs 34 which are preferably integral with the plate and rest upon bosses 35 on the air throat ring 29.

The air outlet throat may be adjusted to vary the volume of airA admitted to the burner by regulating set screws 36, which are threaded through the ring 29 and bear upon the flange 30, so that the ring may be raised and lowered to vary the widthpo't the throat.

The lire bowl may be provided with an overflow outlet 37, preferably formed in the flange l slightly above the normal level of the oil in the reservoir and the oil carried oil" through a pipe 38 that is screwed into the flange in line with the outlet 37.

Vhile l have shown a manually operable valve 12 tor controlling supply of oil to the reservoir, it is apparent that a thermostatically controlled valve may be substituted without departing trointhe spirit ot my invention. j

In assembling the burner, the air throat ring 28 is placed over the grate in the 'furnace so that air may be supplied to the burner through its central opening. The lire bowl is then positioned on the plate 26 and the screws S adjusted to level the bowl. After the ire bowl has been leveled, the vaporizing plate 13 is placed therein with the lugs 18 engaging the boss 9 on the floor ot the bowl. The insulating Yplate 19 is then placed on top of the vaporizing plate and the wicking placed about the periphery of the vaporizing plate to cover the outlet from the reservoir. The ring 25 may then be slipped over the fire bowlwith its slotted portions engaging the feet of the fire bowl legs. The detlecting ring 29 is then positioned inside of the ring 25 and the screws 36 manipulated to adjust the air opening. rIhe flame spreading plate 33 is positioned over the burner with the supporting legs resting on the bosses ol'v the del'lecting ring.

lVhen the burner is operated, the valve 12 is opened, permitting oil to flow by gravity into the lire bowl until it reaches a level about midway of the horizontal diameter of the wick. A lighted paper is `then placed on top of the insulating plate 19 to ignite the oil in the wick, the wick taking up oil trom the reservoir by capillary attraction to replace that which is consumed. 'After the vaporizing plate has become heated,

vaporization takes place in the space bespread outwardly against the walls of theV furnace, the deflection insuring a mixture ot the fuel elements and substantially complete coinbustion'. j

then the space served by the burner has been heated to the desired temperature, the valve 12 may be closed to reduce flow of oil to the burner, or sulliciently to vdiscontinue vaporization by the' vaporizing plate.. ln the latter event, the oil is burned directly from the wick with a short 'flame which serves as a pilot light to keep the vaporizing plate sutliciently hot to insure immediate vaporization when thevalve 12 is again opened to admit a greater supply of oil, the wick ring stabilizing the pilot llame and insuring against its extinguishment by the incoming air or irregularity of flow while the burner is at a low heat.

Thus it will be seen that the burner may operate with a pilot flame small enough to prevent overheating in mild weather, but sullicient for maintaining vaporization, and without smoking.

What I claim and desire to secure by Letters Patent is An oil burner comprising a bowl adapted for containing oil in fluid state, means tor delivering oil to the bowl, a plate covering the bowl and spaced therefrom at its riphery to provide a restricted outlet, a heat insulating plate above the covering plate for retarding vaporization of contents ot' the bowl, a wick adjacent the outlet, and means .for directing air over the wick to support combustion. j

In testimony whereof I aiiX my signature.

WILLIAM L. six,

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