US1442786A

US1442786A - Controlled rotary oil burner

Info

Publication number: US1442786A
Application number: US315983A
Authority: US
Inventors: Jr John Scheminger
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-08-07
Filing date: 1919-08-07
Publication date: 1923-01-16
Anticipated expiration: 1940-01-16

Description

Jan. 16, 1923. 1,442,78fi

J. SCHEMINGER, JR, CONTROLLED ROTARY 0n. BURNER FILED AUG. 7, 1919 8 SHEETS'SHEET 1 jan. 16, 1923. 1,442,786 V J. SCHEMINGER, JR. CONTROLLED ROTARY OIL BURNER.

FILED Ave. 7. 919. 8 SHEETSSHEET 2 Jan. 16, 1923.

J SCHEMINGER JR CONTROLLED ROTARY 0| L BURNER 8 SHEETSSHEET 3 F LED Aug, 7, 1919 o vb Jan. .16, 1923. I 3,4423% J. SCHEMINGER, JR.

CONTROLLED ROTARY 0H. BURNER- FILED AUG. 7, 1919. 8 SHEETS'SHEET' 4 8 SHEETS'SHEET 5 J SCHEMINGER JR CONTROLLED ROTARY 0n. BURNER.

FILED AUG. 7

Jan". 16, 1923.

INVENTOR ATTORNEY Jan I I .J. SCHEMINGER. 'JR.

CONTROLQED ROTARY OIL BURNER.

FILED AUG. 7, 1919. 8 SHEETS'SHEET 6 EEG-8 g7 Tamil. U

Jan. 16, 1923. 1,442,783

J. SCHEMINGER. JR. CONTROLLED ROTARY 0| BURNER.

F1 LEo-Aus. 7 1919. 8 S'HEETS'SHEET 7 g min m Ill fiwezaiaz W Ai'fazzwagw J SCHEMINGER, JR CONTROLLED R TARY 0| 1. BURNER.

B SHEETS-SHEET 8 FILED Aue. 191 9' ATTORNEY Patented Jan. 16, 1923.

JOHN SCHEMINGER, are, or PROVIDENCE, RHODE ISLAND.

CONTROLLED ROTARY OIL BURNER.

Application filed August 7, 1919. Serial No. 315,983.

To all whom it may concern:

Be. it known that 1, JOHN SCHEMINGER,

Jr., a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Thermally Controlled Rotary Oil Burners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appe-rtains to make and-use the same.

This invention relates to liquid fuel burners, and more particularly to rotary oil burners of the typeshown and described in my pending application, Serial No. 274,175,

filed January 31, 1919. i

The objects of the invention are to provide simple and efficient means for effecting a thorough vaporization of the oil or other liquid fuel, and the commingling of the vapor with air for feedingthe burner; to provide means for efiecting a steady and uniform flow of th liquid fuel from a pump to the burner, and to preventv the disquieting effect and irregularity .inthe flow which are caused by the pulsations of the pump in apparatus of this .kind as heretofore ordinarily constructed. Further objects are to provide means for lubricating the driving'gearing and burner shaft bearings, and at the same time to produce a cooling effect thereon and prevent overheating and injury to the Working partsof the burner by causing a circulation therethrough of the lubricating medium; also to provide means for heating. the fuel in its passage to the burner, thereby obtaining more perfect combustion and permitting the use of crude oil instead of the more refined products; also to dispense with a.

' gravity feed; and toprovide means for maintaining a pilot light by the use of gas from a street main, instead of w an oil-fed pilot light, and generally to improve the construction and increase the efliciency of burners of the type shown in my aforesaid application. The invention will first be hereinafter more particularly described, with reference tothe accompanying drawings, which are to be taken as a part of this specificationyand then pointed out in the claims at the end of the description.

In sa1d drawings. 1 F gure 1.15; a perspective -v1ew of an apparatusv embodying my invention as applied to an ordinary domestic furnace, either hot water, hot air or steam;

Fig. 2 is a vertical sectional elevation of a broken away portion of the furnace, showing' in sideelevation my improved rotary oil burner and its operating and feeding mechanism applied thereto;

Fig. 3 is a plan view of the apparatus shown in Fig. 2; the furnace being shown in horizontal section.

Fig. 4 is a detail plan .view of the preheating and feed pipe system;

.Fig. 5 is an enlarged vertical sectional elevation of the burner, taken on the line 55 of Fig. 3.

Fig. 6 is an enlarged vertical sectional Elevation of the pump and its priming cham- Fig. 7 is a vertical sectional elevation of the oil separating and settling chamber;

Fig. 8 is a detail sectional view of the vertical feed-pipe supporting base;

Fig; 9 is a fragmentary detail view, in side elevation. of a part of the oil feeding system, taken on the line 99 of Fig. 3;

Fig. 10 is a fragmentary detail View, in side elevation, of a portion of the oil feeding system taken on theline. 10-10 of Fig. 9;

Fig. 11 is an enlarged side elevation partly in section, of the worm-gear and pump casing, and connected oil circulating pipes for cooling and lubricating themotor-driven gears and burner-shaft bearings;

Fig. 11 is a plan view, partly in section. of the worm-gear and casing; the cover of the worm-gear chamber being removed; and Fig. 12 is a front view of aportion of the apparatus including a thermostat andelectrical connections controlled thereby, for automatically starting and stopping the motor, also showing an oil supply tanlr independent of the main fuel supply and associated parts, for automatically control ling the su'pplyof fuel to the burner and the pilot light when an oil-fed pilot light is used instead of a gas-fed pilot light.

Referring to said drawings, in which the same reference letters are used to denote corresponding parts in different views. the letter A may denote anordinary domestic furnace, theletter. B a hollow casting or standard supporting the burner head and having journaled therein a 'vertical hollow shaft. C, within which is'secured a vertical feed pipe C the'burner being located in the ash pit of the furnace. The shaft G has secured thereon at or near its upper end a spray-plate or atomizing device, which is preferably of the construction shown, though other forms may be employed. The letter M denotes an electric motor for rotating the spray-plate or atomizer Dv through the medium of a horizontal shaft m, which is coupled to the motor shaft and has its outer end journaled in suitable bearings, preferably annular ball bearings m and 472* within the casting B. Said shaft m carries a helical ear m arranged Within the hollow casting in mesh with a larger helical gear m fixed on the shaft C for imparting motion thereto. Any suitable gears may be em ployed, but preferably the larger gear is constructed of fiber or composition todeaden sound. The vertical shaft 0, as shown, is 'ournaled in annular ball bearings E and located at the upper end and base, reslpectively, of the hollow casting or standard as shown in Fig. 5 of the drawings. The vertical feed pipe C through which oil is supplied to the burner, has its lower end screwed into a feed-pipe supporting base or casting G which is bolted or otherwise secured to the base of the hollow casting B, on the under side thereof. The feed-pipe supporting casting C is formed or provided withv a pendant hub-like portion having an opening in one side thereof which is incommunication with the lower end of the vertical feed pipe C and in said opening is screwed an interiorly threaded sleeve 0, to receive the end of the oil feed-pipe C VVi-thin said pipe C is fitted a smaller pipe (1*, of such size as to leave sufficient space between it and the pipe C for the passage of oil through the larger pipe. The pipe C is extended up through the oil feed pipe C and supports at its upper end a T-coupling or head piece F, having secured therein downwardly curved pies or nozzles through which jets of vapor or gas may be directed and projected against. opposite sides of a domeor inverted cup-like member G, fixed on the upper end of the feed-pipe C while other jets are pro'ec-ted against the spray plate or atomizer on opposite sides of its center, for the purpose of supplying fuel to maintain a pilot light for starting the burner and to heat said dome and spray-plate so as to facilitate combustion when the burner is set in operation. The casting B has mounted thereon an annular member B which is formed or provided with a central cone B which tremmates in a cylindrical portion B of sufficient size to surround the vertical shaft and leave a space therearound for the admission of air entering underneath the member B between which and the top of the standard B there are placed a series of washers of asbestos or other material suitably spaced to permit the entrance of air between adjacent washersand the two castings B and B and the air thus. admitted travels upwardly along the vertical shaft and is directed against the underside of the spray plate, as indicated by the arrows in Fig. 5, for supporting combustion and also exerting a cooling effect on the upper shaft bearing E. The annular member B serves as a drip pan to receive any oil that may escape from the burner and which may escape from the drip pan through a waste-pipe b, Fig. 1. The member B 1s outwardly flaring and has a flat annular marginal portion or surface 6 adapted to support the inner circumferential portion of a wire mesh or other reticulated or screen-like metal plate, the outer edge of which bears against the inner wall of the furnaceyand on said plate is placed a body of asbestos or other refractory material, which surrounds the burner head and serves toconfine the heat or flame above said plate and within the fire box of the furnace so as to prevent excessive heating of the lower portion of the furnace with consequent injury to the shaft bearings and driving gearing housed in the casting B. Between the body of the refractory material and the inner Wall of the furnace, or its water-leg A is placed a corrugated sheet'metal plate R, which forms a combustion chamber surrounding the head of the burner and provides air spaces between it and the furnace wall, whereby-currents of air are caused to pass upwardly through the channels '1", formed by the corrugations, whilst other currents are drawn in between annular spaced members B and B of the burner head, by the suction created by the rotating spray plate, and passing downwardly between said members B and B are caused to pass up underneath and through the spray plate for commingling with the'vaporized oil in the manner indicated by the arrows in Figs. 2

The annular members B and B! are: flared outwardly at or toward their upper ends and the member B has its lower edge cut away to fit over the fuel pipe p where said pipe enters the-burner and the two parts B and B are rigidly secured together So as to prevent disconnect-ion thereof, or independent movement one upon the other, by fastening bolts or other means. The member B has inwardly extending lugs 6 adapted to support the superposed annular member B", the outwardly flaring part of which. is spaced from the flaring portion of the member 13 iso so as to provide a passage between the two members for the entrance of air which is drawn up underneath the spray plate, as indicated by the arrows in Fig. 5. The interior of the hollow casting or standard B forms an oil chamber in which are housed the helical gears m and m", and for the purpose of lubricating said gears by submerging them in oil and also the worm gears in the gear chamber H, and to produce a cooling effect of the oil it is caused to circulate through said chambers and the vertical shaft bearings, and to this end, the chamber H has secured thereto or formed thereon the casing of a rotary pump I which is used for drawing oil by suction from the worm gear chamber H and forcing it through a pipe It into the upper vertical shaft bearing E, from which it flows into and fills the gear chamber within the hollow standard or casting B, and from the latter chamber sufiicient oil flows into the lower vertical shaft bearing E to keep it submerged in oil. From the oil-filled gear chamber within the standard B, oil is drawn by the pump I through a pipe it back into the worm gear chamber H, whereby a constant flow of oil into and out of the gear chambers and through the vertical shaft bearings is maintained, and by the circulation of the oil the worm and helical gears and vertical shaft bearings are thoroughly lubricated and at the same time a cooling effect is produced which prevents over-heating of the shaft bearings and driving gears. To prevent undue pressure of accumulated air within the gear chamber of the vertical hollow shaft 0 an air vent 0 is formed in said shaft above the ball bearing E, through which air may escape, and ascending up the shaft will pass into the concavity of the dome G, and thence to the burner,with commingled vapor or gas. The worm-gear chamber H is provided with a gage k to indicate the level'of the oil therein, and with an oil cup h having a removable cover for filling the chamber with oil.

To feed the burner, I preferably provide an oil circulating system with means for heating the oil or other liquid fuel during its passage to the burner, together with means for separating a portion of the oil and the air contained therein from the major portion and causing the separated por tion to flow quietly, continuously and evenly to the burner, unaffected by the pulsations or irregular movements of the pump piston or pistons, while the major portion is caused to ascend to a predetermined point so as to create suflicient back pressure opposed to and tending to counteract the pressure of the pump to accomplish the desired separation and quieting of the minor portion of the fuel. To this end a pump P is connected by a pipe ;0 with an oil tank or other source of liquid fuel supply (not shown), and a pipe p leads therefrom to the separating and quieting device or separator K. The pipe p is formed or provided with one or more coils p therein, which surrounds the cone B or the cylindrical extension B thereof, below the burner head, and with a return bend p which is connected with the inlet to the separator K; the purpose of said coils being to utilize the heat enerated by the burner for heatingthe liquid fuel in its passage to the burner so as to facilitate vaporization and combustion. The pump P, of the form shown, is of ordinary construction and the intake port thereof is connected with a priming chamber P, which in this instance, as shown, if of globular form, and contains a strainer P The priming chamber P has secured thereon a removable cap P which serves also to clamp the upper flanged end of the strainer P between it and the top of the chamber, in order that upon removal of the cap the strainer may be taken out for cleansing or other purposes, or a new strainer may be substituted therefor and secured in place by replacing the cap. The cap P has secured thereon the threaded end of an elbow which is coupled to the fuel feed pipe p. The casing of the separator K is preferably diamond shaped and arranged so that one of its reduced end portions is at the base thereof, which the pipe p enters at one side while the other reduced end has an interiorly threaded discharge opening therein in which is screwed a coupling device on one end of a discharge pipe K having on its other end a coupling member adapted for connection with an upwardly extended pipe K and also having a check valve is therein to prevent back flow. The pipe K is provided with an upward extension K which terminates in a return bend arranged to discharge into the mouth or funnel on the inlet end of a downwardly extending pipe K through which the liquid fuel discharged therein is conducted back to the supply tank or reservoir (not shown). The pipe sec-tion K is adapted to be turned part way around to bring its goose-neck end or return bend into position to discharge into a pilot light fuel supply tank L, (Fig. 23) for a purpose hereinafter explained. The break in the pipe connection between the adjacent ends of the pipes K and K is to prevent siphonic action after the pump is stopped tending to empty the pipe K and thus prevent the maintenance of a solid column of liquid for exerting back pressure suflicient to insure a steady and uniform feed of fuel oil on again starting the pump.

At the base of the settling chamber K of the separator there is a discharge opening K with which is connected the pipe C which communicates with the vertical feed pipe C for supplying fuel to the burner, as hereinbefore stated. In the pipe C lever.

is placed a check valve 0 to prevent back flow of fuel oil, a regulating valve 0 by which the quantity of oil passing through the pipe may be increased or diminished as desired, and a needle or plunger valve 0*,

for automatically cutting off the fuel supply when the temperature of the furnace rises above a predetermined point. For this purpose a lever N is fulcrumed on a' post rising from the base casting of the burner and has its short arm arranged to press upon the stem 0 of the plunger valve while its longer arm is connected by a cord or chain 92 with one arm of a lever N fulcrumed on adiaphragm O mounted on the furnace. The free end of the lever N carries a countel-balancing weight N The diaphragm O is in communication with the water circulating system or steam space at'thetop of the furnace, in order that when the heat of the furnace rises above the desired temperature the diaphragm will be expandedby the entrance of hot water, hot air or steam therein, thereby actuating the valve operating lever and through it and the lever N depressing the plunger Valve so as to cut off the supply of-fuel to the-burner. As the temperature is lowered the plunger valve will be opened by a'spring acting thereon as usual in this class of devices. To prevent injury to the valve 0 by excessive pressure of the lever N on its stem, a stop a is placed beside the valve in position to limit, the downward movement of the depressing Mounted upon a T-coupling in the pipe C there is a cut-off valve 0 adapted for connection with the lower end of a pipe L leading from the tank L when it is desired to connect the fuel tank with the pipe for feeding oil instead of gas to maintain a pilot light. In order to supply'gas to maintain a pilot light, the fuel feed pipe 0'' is provided with a T-coupling C through which the gas feed pipe C passes and has its outer end brazed or otherwise secured within the depending end of an elbow c which is connected by a union coupling member 'with a gas pipe C (Figs. 3, 9 and 10) which is adapted to be'connected with the ordinary gas supply pipe or means for supplying gas to the building in which the burner is installed; said gas pipe C being furnished with a cut-off valve 0 for turning on or cutting off the pilot light gas suply v It is desirable to utilize the same motor that rotates the vertical shaft of the burner and the spray plate thereon fordriving both the fuel supply pump and the lubricating pump, and to accomplish this, I couple the motor shaft'to' a shaft S, which carries the worm S ,'which is housed in the worm-gear casing H; said worm S? being in mesh with a worm gear carried by a shaft T'that projects through and has its bearings in the casing H and is operatively connected with one of the pistonsof the lubricating pump for actuating the same; said shaft T being also operatively connected with one of the pistons of the fuel supply pump, for actuating the latter in unison with the lubricating pump. For convenience in assembling and to compensate for any difference in the alinement of said shafts, I provide a flexible coupling S between the motor shaft and said worm shaft, and alsoa flexible coupling T between said worm gear shaft and the driving shaft T of the fuel oil pump. (Figs. 2, 3, and 11 The means employed for automatically controlling the circuit of the electric motor by which rotary movement is imparted to the burner, whereby the burner is put into or out of operation in accordance with temperature changes influenced by the burner, may be of any suitable construction, but

preferably substantially the same as shown in my application above mentioned, and in Patent No. 1,388,541 granted Homer C. Woodbury, August 23, 1921, with certain changes resulting from the use of' a gas-fed pilot light with provision for using an oil fed pilot light and the introduction of other novel features hereinafter described.

The circuit controlling mechanism (not shown) is enclosed in a box U, (Fig. 12), in electrical connection with the thermostat T and also in electrical connection with a tank-float control switch, for automatically starting and stopping the motor and controlling the supply of fuel to the burner and the pilot light, when an oil-fed pilot light is used instead of the gas-fed pilot light. It will be seen that oil is fed to the burner from a source of supply (not shown) by means of the force pump and co-operatin devices hereinbefore described, while gas is fed to the pilot light, instead of feeding both the burner and the pilot light from a common source, but oil may be used to feed the pilot light from a supply tank independent of the main fuel supply, and for feeding both the burner and pilot light with oil by gravity flow from an auxiliary oil feed tank, the tank and tank-float control switch and circuit connections shown in Fig. 12 are brought into action.

The box U may contain an electromagnetic relay and circuit wires for connection with a battery (not shown) and the thermostat T, for making and breaking the electric circuit in response to changes of temperature, causing its pointer t to swing into contact with the contact point t or the point F, as usual in thermally controlled apparatus. When it is desired to use oil for feeding the pilot light, the electric circuits being connected with the float-controlled electric switch, oil may be fed by gravity from the tank L to the pilotlight through the tank L instead of discharging into the return pipe K as hereinbefore described. The tank L is provided with an overflow pipe L through which oil in excess of that necessary to feed the pilot light is conducted back to the main source of supply or storage tank to prevent waste, and in order that the tank L may be emptied, if desired, abypath is provided from the pipe L to the pipe L through a connecting pipe L having a cut-off valve Z therein controlling the passage of oil therethrough. In order to keep the pilot light burning at times when the motor is idle and the furnace fire out, when the pilotlight is being fed from the tank L, the stem W of the tank-float is passed loosely through thefree end of a switch lever and has secured thereon, on opposite sides of said lever, tappets w and 10 whereby when the oil in the tank is exhausted the switch lever will be shifted by the descending float into contact with the contact point 1, thereby closing an electric circuit through the battery and the relay magnet and thus effecting a closure of the motor circuit and starting the-motor, so as to replenish the oil in the tank. When the tank is being filled, as the liquid rises therein the-lower tappet w, on its upward move- I ment, will raise the switch lever into contact with the contact point 3 thereby again main fuel supply is turned on, without requiring the services of an attendant for this purpose.

It will be understood of course that the specific atomizing device and the fuel oil separator and the rotary oil pump with its priming chamber, which are especially designed and adapted for use as elements of the complete combination or apparatus embodying my invention, are nevertheless merely preferred forms of such devices for accomplishing the desired results, and that other forms may be "substituted therefor without departing from the spirit and scope of my invention, and these specific devices are not specifically claimed herein.

The spray plate oratomizer is preferably constructed of sheet steel, swaged or pressed into concavo-convex form,- and provided with a series of apertures or openings therethrough which are formed by slitting the metal plate at intervals, preferably along circular lines, and bending the metal upwardly on one side of the slit, as at d, and downwardly on the other side thereof, as at al so that the openings are oval in form and have their axes extending in a plane at an angle to the periphery of the plate. The central portion of the plate has secured thereto, by rivets or otherwise, a central sleeve or hub-like portion D which ha'san annular flange. on which are formed or secured a series of upright or upwardly extending blades d which extend at an angle to the axes of the oval openings and are designed to break up and whirl the oil or liquid fuel outwardly for commingling with the air passing up'through the plate. The margin or periphery of the plate is slit radially and the adjacent metal is bent upwardly and downwardly on opposite sides of the slits so as to form vane-like portions or blades (P; As the spray plate is rotated in the direction of the arrows (Fig. 3), the air entering the burner from below the plate is raised by the depressed portions d of the metal surrounding the openings and forced upwardly by the raised portions d and whirled outwardly, and is also thrown upwardly and outwardly by the upwardlyinclined blades d so as to effect a thorough atomization of the oil and the commingling of the vapor with air.

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

1. In a rotary oil burner, oil feeding means compris ng a supply tank, a circulating system including a pump for drawing the oil from the tank, and means for separating the oil and returning the larger portion to the tank while the lesser portion is caused to pass quietly and evenly to the burner unaffected by the pulsations of the pump.

2. In combination with a rotary oil burner. a liquid fuel supply tank and devices for feeding the burner from said tank including a pump and means whereby the liquid fuel is drawn from said tank by the pump and a portion thereof separated and freed from air and caused to flow quietly and evenly to the burner while the major portion is caused to ascend to a predetermined point from which it is conducted back to said tank; the ascending column of liquid being adapted to exert back pressure acting on the lesser portion to effect the passage of the latter to the separating the oil and causing the larger portion to return to the tank while the lesser portion is caused to pass quietly and evenly to the burner unaffected by the pulsations of the pump, together with means for heating the lesser portion in its passage to the burner;

4. In a rotary oil burner, an oil circulat-' ing system including a supply tank, a feed pipe, a pumping and a separating device between the burner and pump whereby the oil drawn from the tank is divided into unequal portions and the larger portion caused to move in an ascending column to a predeten mined point and then return to the tank, the ascending column being-- adapted to exert back pressure actinon the smaller portion and with the aid 0 the pump causing said smaller portion to pass quietly and evenly 'to the burner unaffected by the pulsations of the pump. I 5. In a rotary oil burner, a hollow vertical shaft carrying a spray plate'having openings therein for the passage of air therethrough, means for rotating said shaft,an oil feed pipe extending up through said hollow shaft and carrying an inverted cuplike member arranged centrally over said spray plate, anda gas feed pipe extending spray plate, and a gas feed pipe extending up through said oil feed pipe and having secured thereon downwardly curved pipes or nozzles for directing jets of vapor or gas against said cup-like member and against the spray plate'on opposite sldes of 1ts center.

7. In a rotary oil burnerhaving a rotating atomizing device and means for rotat- 'ing said device, an oil feed pipe and a supply tank for feeding the burner, a gas pipe for feeding a pilot light, and an 011 feed pipe enclosing the gas pipe and ada ted for connection with an oil supply tank or feeding the pilot light when the gas-fed pilot light is not used. a

8. In a rotary oil burner, a hollow vertical shaft carrying a spray plate having openings therein for the passage of air therethrough. an oil feed pipe .extending through'said shaft above said spray plate and having means thereon for spreading the oil over the surface of said spray plate, a

standard in which said shaft is journaled, a pan mounted on said standard and havr ing an outwardly flaring portion and a centrally arranged substantially conical portion to provide an air passage upwardly between it andsaid shaft, and a plurality of outwardly flaring rings mounted on said pan, the flaring portions of said rings being slightly separated to permit air to be drawn downwardly therebetween and commingled with air passing upwardly through said conical portion.

9. In arotary oil burner, a hollow standard, a .vertical hollow'shaft carrying at its upper end a. spray plate, having openingstherein for the passage of air there through, said shaft being journaled in bearings arranged within said standard, a pan mounted on said standard having an outwardly flaring portion and a centrally upwardly extending disposed substantially conical portion surroundin said shaft and spaced therefrom to provide an air passage therethrough for discharging air under said spray plate, and a plurality of flaring rings above said pan arranged one above another and separated to permit the passage of air therebetweeu.

10. In a rotary oil burner, a hollow standard, a vertical shaft journaled in ball bearings within an oil chamber formed in said standard, an atomizing device on said shaft, and means for submerging said bearings in oil, together with means for forcing oil into said chamber and causing it to flow therefrom, thus effecting a. circulation of the oil through or around said bearings and the shaft driving mechanism so as to produce a cooling effect thereon.

11. In combination with a rotary oil burner located in the ash pit ofa furnace, a body of refractory material surrounding the burner head, and a corrugated metal plate interposed between said refractory material and the inner wall of the furnace, said plate serving to protect the inner wall of the furnace and the corrugations therein serving as air ducts.

. 12. In combination with a rotary oil burner placed within the ash pit of a furnace, a. corrugated furnace wall protecting plate supported between the burner and the inner wall of the furnace, the corrugations in said plate serving as ducts for the upward passage of air. V Y 13. In combination with a rotary oil burner placed within the ash pit of a furnace, a corrugated-furnace wall protecting plate supported between the burner and the inner wall of the furnace, the corrugations in said plate serving as ducts-for the upward passage of air, together with a rotating atomizing device adapted to create suction tending to draw the air entering said ducts downwardly underneath said plate for commingling with vaporized oil.

.14. In combination witha rotary oil burner having a rotating spray plate, said plate having circular series of openings therethrough and associated means for-cre ating suction and drawing up inwardly tions of said annulus forming air ducts, and said spray plate operating to induce currents of air entering said ducts and passing underneath and through the openlngs in the spray plate.

15. The combination, in a rotary oil burner, of a vertical shaft having a rotat ing spray plate or atomizer thereon, said plate having openings therein for the passage of air therethrough, a standard in which said shaft has its bearings, an oil feeding device, a drip pan mounted on said standard and having a hub-like portion sur rounding said shaft so as to provide an air passage between it and the shaft, provision being made for the admission of air.be-

tween said standard and pan, and a pluraliv' of outwardly flaring rings mounted on said drip pan and slightly separated to provide for the passage of air therebetween.

16. The combination, in a rotary oil burn-v er, of a vertical hollow shaft having a rot-ating spray plate or atomizer thereon, said plate having openings therein for the passage of air therethrough, .a standard in which said shaft has its bearings, an oil feed pipe extending up through said hollow shaft, and a plurality of outwardlyflaring rings mounted on said standard, the flaring portions of said rings being slightly separated to provide for the passage of air therebetween, and an air passage being provided from below said rings upwardly around the vertical shaft.

17. The combination, in a rotary oil burner, of a vertical shaft having a rotating spray plate thereon, said spray plate hav ing series of openings therein forthe passage of air therethrough, a standard in which said shaft is journaled, a drip pan on said standard having a central cylindrical member surrounding said shaft so as to provide an air passage between it. and the shaft, air ducts being provided between said pan and the top of saidstandard leading pan and between said concentric rings and caused to pass underneath the spray plate and upwardly throughsaid openings. 18. In a rotary oil'burner, astandard, a vertical hollow shaft journaled in said standard, an oil feed pipe in 'said'hollow shaft, a drip pan mounted on said standard and having a central portion of. conical form extending upwardly around shaft, an outwardly flaring ring mounted on said drip pan, anda second outwardly flarin ring mounted on the first named ring a so fiaring outwardly; the flaring portions on said rings being spaced apart to permit the admission of air therebetween.

' 19. The combination in a rotary oil burnor of a vertical hollowshaft having a spray plate thereon, means for rotating said spray plate, an oil feed pipe extending through said shaft, :1 dome-like oil spreader and distributor at the discharge end of said pipe, a gas feed pipe extending through said oil feed pipe for feedin a pilot light, and means on said gas fee pipe facing the con vex surface of said dome for directing a jet or jets of gas against said surface.

20-. The combination in a rotary oil burn- 'er of a vertical hollow shaft having a spray plate thereon, means for rotating said spray plate, an oil feed pipe extending through said shaft, and carrying at its upper end a dome-like oil spreader and v distributor,- a gas feed pipe extendingthrough said -oil feed pipe, and downwardly curved pipes or nozzles at the upper end of Said gas pipe for directing jets of gas against said dome and spray plate.

In testimony WhereofI affix my signature in the presence of two witnesses.

JOHN SGHEMINGER, JR.

Witnesses:

B. M; OFFUTT, THOMAS F. BURKE,

said