US2202718A - Oil burner - Google Patents

Description

May 28, 1940. R. M. RUNGE Er AL l OIL BURNER Filed oct. s1, 1958 "7 sheets-sheet l1 ATTORNEY May28, 1,940. R. M'. RUNGE Erl/u. 2,202,718

OIL BURNER 7 Sheets-Sheet 2 Filed Oct. 3l, 1938 lNvENTo @fm/asf 5. P//scz/cc/ ATTORNEY v May 28, 1940. R. M. RUNGE ET AL- OIL BURNER Filed Oct. 31, 1938 '7 Sheets-Sheet 5 ATTORNEY May 28, 1940. R. M. RUNGE Er A; 2,202,712

OIL BURNER Filed Oct. 5l, 1938 7 Sheets-Sheet 4 jj 45 i f5?? 42 I Q0 i Cil INVENTORS ATTORNEY R. M. RUNGE Er AL 2,202,718

OIL BURNER May 28, 1940.

Filed Oct. 3l, 1958 7 Sheets-Sheet 5 ATTORNEY May 28, 1940. n. M. RUNGE Er AL 2,202,718

OIL BURNER Filed 001'.. 31, 1938 7 Sheets-Sheet 6 Ik r ATTORNEY May 28, 1940. R. M. RUNGE Er AL OIL BURNER Filed Oct. 3l, 1938 7 Sheets-Sheet v'f ATTQRNEY Patented May 28, 1940 PATENT l OFFICE OIL BURNER Richard M. Runge and Ernest B. PascuccL Meriden, Conn., assignors tc The Miller Company, Meriden, Conn., a ,corporationA of Con- .necticut Application october a1, 193s, serial No. l237,826

2s claims. (el. 126-45) The present invention relates to oil burners, .and is more particularly directed toward oil burners of the wick type employing forced draft.

In oil burners of the type contemplated the draft is produced by an electric motor which operates a blower forcing the-air through the burner or burners all the time that the motor is in. operation. The forced draft passes up by the wick and this makes it possible to dispense with lo. a chimney so that the burner may be close tothe grate which supports the utensil to be heated, or may be close to the bottom of an oven.

According -to the present invention each burner I is provided with a snuffer which can be either 1:; held a sufcient distance above the wick so that a flame may be propagated, or which may be lowered to aposition to extinguish the flame. Suitable mechanism is provided whereby the snuffer is releasable so as to drop to cover the top of the `wick and cut off the air supply from the wick whereby the flame is extinguished. These releases are interconnected with the motor and air blower in such a way that upon failure of 'motor operation the releases disable the snufferholding means so that the snuffer drops. This affords aisafety factor which insures that there will be no Apossibility of the burner continuing to burn after the blower has ceased operation, as, vfor example, upon power failure.

30 Other l:aindfurther ,objects of the invention will appear as the description proceeds.

- The accompanying drawings show, for purposes yof illustrating the present invention, several embodiments in which the invention may 35 takeform, it being understood that the drawings are illustrative of the invention rather than lim-- iting the same.

11n these drawings:

Figure l. `is a front elevational view of a flat top` oil stove illustrating burners under the top of `the stove and under the oven;

Figure 2 is aside elevational view of the stove of Figure 1;

Figure 3 is a perspective view illustrating a battery of four burners operated from a single motorand blower and having manual snuffer lifters and automatically controlled snuffer releases, the snuifers being shown in the upper or burning position;

Figure 4 is a vertical sectional view taken on the Y line 4--4 of Figures 3 and6 illustratingI two burners, the one at the left being in the burning position, ,the 011e at the right with the parts in pcsitien fer :lighting the wiel: with a match;

Figure 5 is a sectional View taken on the line E-.S lof Figure 4,;

Figure 6 is an inverted plan view taken on the line 6-6' of Figure VIL1parts being in elevation;

Figure 7 is a View similar to Figure 4, but showing the burner in the stop or olf lposition with the snuifer lowered;

Figure 8 is a sectional View taken on the line 8-8 of Figure 7, the dot-and-dash line position ofA parts indicating the positions assumed preparatory to lighting the burner with a match;

Figure 8A is a fragmentary elevational view at an enlarged scale showing a detail;

Figure 9 is a longitudinal sectional Viewl through a modified form of construction, the parts being shown in full lines in the burning position, the dotted line indicating the position CII assumed during lighting with a match and 4the dot-and-dash line indicating the manual `release of the snuffer;

Figure 10 is a fragmentary View taken 'on the line VIll-lll ofFigure 9;

Figure 11 is a fragmentary longitudinal sectional view through a modified form of construction in which the snuffer is lifted by the governor on the motor;

Figure 12 is a fragmentary sectional view on the line l2--l2'of Figure 11;

Figure 13 is a top plan view of a battery of four burners arranged -radially with respect to a central blower and air-chest, the full lines in.- dicating position of parts when the stove is not operating, the dot-and-dash lines indicating parts in burning position;

Figure 14 is a vertical sectional View taken 0n the broken line l4-I4 of Figure 13, the parts being in the burning position;

Figure 15 is a fragmentary sectional View taken on the line I5-I5 of Figure 13;

Figure 16 is a fragmentary enlarged plan View taken in the direction of the arrow I6 of Figure 15;

, Figure 1'7 is a vertical sectional view through a single burner unit with the motor mounted underneath the burner, the parts being in the burning position; and

Figure '18 is a perspective view of a space heater employing the burners shown herein.

Figures l and 2 illustrate aat top stove of typical dimensionsy and appearance and might be a chassis designed to use the lconventional burners of a gas stove or the heating units of an electric stove. vIt is here illustrated, however, as housing the burners for a forced draft oil stove. These burners Amay be carried directly below the oven 20a. The upper burners are diagrammatically illustrated at 2| and the oven burners at 22. It will be noted that these burners with associated forced draft mechanism (illustrated in dotted lines) form a very shallow structure. In fact it occupies substantially the same space as the burners of a gas stove so that the same chassis may be used for the oil stove, and at the same time have the smooth top and the desirable storage cabinets which go in gas and electric stoves. All the controls are brought out to the front of the stove and the motor for supplying the draft and fuel tank are placed behind the stove.

In the arrangement shown in Figures 3 to 8, inclusive, there are four complete burner units connected to a single air-chest and-provided with air by a single motor operated blower. The motor for operating the blower is indicated at 30, Figure 4. It is carried in a housing 3| apertured at the outer end, as shown at 32, to admit air and having an'inner aperture 33 to permit air to be driven into the air-chest by a multiple bladed fan indicated at 34, this fan being driven by a shaft 35. rIhe fan spider has a cone bearing surface indicated at 36, and the shaft carries a conical member 31 pressed toward the fan body by springs 38 carried on pins 39. Balls 40 are interposed between these two conical surfaces and when the motor is idle the parts are in the position shown in Figure 7, when the motor is running at speed these parts just described are in the positions shown in Figures 4 and 6. The fan or blower 34 is received in a box 4| which is connected With two forwardly extending conduits or air-chests 42. The openings between the box 4| and these conduits or air-chests are covered with a screen indicated at 43, which serves to bring about a more even ow of air throughout the entire cross sectional area of each of the air-chests 42.

Each of these air-chests 42 supports two burner units which may be identical. The top or cover 44 of the air-chest is provided with large openings 45 having aligning flanges 46 extending upwardly to fit the inside of a double walled wick tube 41 carrying a cylindrical wick W. Outside this Wick tube the cover plate 44 is provided with a number of perforations 48 shown more clearly in Figure 6. These are adapted to pass air up into an outer air vtube 49 concentric with the wick tube.

The wick tube is provided with a perforated diaphragm 59 which has a guide tube 50' to support an axially disposed rod This rod extends up through a flame spreader 52 and carries an inverted cup-shaped snuier 53 larger in diameter than the flame spreader and slightly larger than the upper outer wall of the wick tube. Between the diaphragm 50 and ame spreader the wick tube carries `an air distributor indicated at 54.

In the particular constructions shown herein, except Figure 17, the flame spreader and air distributor are separable.k They may, however, be unitary somewhat as shown in Wilcox Patent 1,717,484. The separable form of ame spreader and air distributor admits of the lifting of the flame spreader 52 by the shoulder 55 on the rod 5|, as will be apparent by comparing the position of these parts in the two burners of Figure 4. The purpose of lifting the flame spreader and snuffer to the higher elevation is to provide more room for the insertion of a match to the top of the wick.

Thevouter air tube 49 is drawn in, as indicated in the drawings, so as to be brought close to the wick tube. It carries a constricted collar 56 whose upper edge is close to the top of the wick tube. This constricted collar is provided with a row of perforations 51 which is spaced above a shoulder 58 and this shoulder supports a re collar 59 of suitable shape to divert the flame up toward the grate.

The wick tube is provided with the usual wick lifting mechanism including the gears indicated at 60 and shaft indicated at 6|. Each of these shafts extends out through the respective outer air tube 49 and is connected by a suitable universal coupling 62 to an operating shaft 63 which extends out through the front of the stove where it is provided with an operating knob illustrated at 64, Figures 1 and 2. These control knobs make it possible to conveniently raise and lower the wicks to adjust the ame, or turn it out when burner operation is no longer desired.

The oil supply tubes are indicated at 65. They extend through couplings 66 in the outer air tubes 49 and into the usual couplings 61carried by the wick tubes.

When the motor is not in operation the speed responsive mechanism is in the position shown in Figure 7, the parts to be acted on thereby are pushed to the rear of the stove. motor is in operation these parts are pushed toward the front. The cone 31 of the'speed responsive mechanism has'a ball 68, which bears on a spring which in turn presses against a horizontal rod or cross bar 1|. Thiscross bar is connected to a plunger 12 by a screw 12', and carries adjusting screws'12a and 12b bearing in the ends of plungers 13 and 14, which extend through the air-chests 42. The plungers 12 and 13 are urged to the rear by springs indicated at 15, while the plunger 14 (disposed between the air-chests) is urged to the rear by springs'indi-- cated at 16. 1

The plungers 12 and 13 extend under the two burners mounted on the respective air-chests. They are supported by downwardly bent apertured lugs 11 carried bythe air-chest cover platey 44, and each rod carries a pin 18 (see Figure 8A) adapted to shift a latch '-19 v(pivoted to the guide tube 50') from the position shown in Figure 4 to the position shown in Figure 7 when the motor stops or the speed is materially reduced. The latch is moved to the right, as shown in Figure 4,

by a spring 80 abutting a washer 80a held in.

place by' a pin 80h. The latch isadapted to'cooperate with a shoulder 8| placed near the lower end of the vertically reciprocable carrying rod 5|. The lower end of this rod is reduced as indicated at 82.

The snuier rods 5| are adapted to be manually lifted by Aknobs 83 extending out through the front of the stove. These knobs are connected to shafts 84 which extend through the air-chests 42 and are slidably carried under the cover mem- When theL ber 44 by apertured lugs 85. Each of the rods v 84 carries two lever arms 86 and 81. When the stove is in normal operation or when it is idle, the shafts 84 are in the angular position indicated in Figure 8, and the lever arms 86 and 81 are in the position shown in full lines in Figure 8. The shafts 84 can be moved axially in their bearings from a mid-position, as shown at the bottom of Figure 6, to the right, as shown by the shaft 84 at the top `of Figure 6, or to the left a similar amount. it possible to select which rsnuiferlwill be,

'This makes f lifted. The lower end 82 of each .of the snuffer rods is above a lifter lever 88 pivoted on lugs 89 and having an ,extension which is disposed below the lifter levers 86 or 81. When the rod 84 is in the longitudinal position shown at the bottom of Figure 6 and is turned from the full line position of Figure 8 to the dotted line position of Figure 8, both snuifer lifter levers 88 will be swung to the dot-and-dash line position of Figure 8. When the uppervrod 84 of Figure 6 is in the longitudinal position indicated in that figure and a,v similar turningmovement is made only the upper right hand lever 88 of Figure 6 will beaffected, and, when the upper shaft 84 of Figure 6 is pushed all the way to the left, .the arm 81 will be moved away from .the corresponding snuifer lifter lever and the arm 8.6 only will engage its corresponding snufferliftlng lever. In this. way it is possible to select which one of the snuifers will be lifted. The extent of lifting is shown in the dot-and-dash line position of Figure 8 and at the right hand burner of Figure 4, wherein it will be seen that the snulfer 53 and the flame spreader 52 have been lifted to an elevation above the normal burning position.A This facilitates lighting the burner with a match. To temporarily reduce the air pressure and lessen the tendency to blow out the match, a trap 9| may be opened by the lifter lever 88.

lIt is, however, possible to light the burner with a match without having the snuffer at a higher l elevation than that shown at the left of Figure 4, and, of course, where ignition other than that by match isl employed there is no occasion for lifting the flame spreader further away from the wick or for lifting the snuffel' above the normal burning position, or for the trap.

When the parts are in the position shown in the dot-and-dash lines in Figure 8, the lever 86 is turned far enough to hold the snuffer in the elevated position, so that one need not maintain a grip on the control knob. As soon as the knob, however, is turned slightly to lower ythe snuffer, the snuffer drops down far enough to bring the shoulder 8| on the rod 5| against the latch assuming that the latch has been urged to the right by the speed responsive mechanism above de-k scribed. v

It will thus be seen that one can light' any one or all of the burners or` can extinguish the flame by turning down the wick and then relight the burner, and that the entire stove can be put out of operation by switching off the current to the motor by a convenient switch, such as indicated In the operation vof vthe stove `both air chests are maintained at a definite and uniform pressure above the atmosphere by the blower, and should one or more burners be turned off there will be an air leakage around the burners that are turned oif so that it will not materially interfere with the operation of the burners that are still burning. This air is blown up through the openings inside and outside the wick tube in a proportion which can be quite definitely controlled by selecting the proper size for theapertures through which the air enters as well as the size of the passages through which the air escapes upwardly in passingthrough the air distributor, collar and about the wick. An extremely hot flame is producedby the combustion of the fuel on the wick and the outer re collar'diverts this flame upwardly so that it can play directly on the oven n or dish to be heated, thel dish being supported bya grate 30. usual. 'libe 53 being larger than the wick and covering the wick, lthe flame spreader and air distributor, it is obvious that the wick is very well protected against any foreign ymaterial dropping on to it.

In the form shown in Figures 9 and l0 most of the parts are the saine as those shown in Figures 1 to 8, inclusive, and these common parts will not be again described, similar reference characters, however, being applied to them. Here shoulder 8| of the snuffer lifting rod 5| is engaged by a latching lever |00 pivoted at |0| to a plunger |02 and under the inuence of spring |03. The plunger |02 is urged to the right by a spring |02 and is pushed to the left by the speed responsive mechanism, as above described. IThe snuffer lifting operation is effected by an arm |04 carried on a shaft |05 and movable Aas indicated in Figure 9. The snuffer can be tripped manually by an arm |06 carried by the shaft |85. This formof construction is more suitable for a plurality of burners in line with thefan axis, as it eliminates considerable of the mechanism shown in the four burner arrangement of Figure 3.

In the arrangement in Figures 11 and l2, the speed responsive mechanism operates on a spring |.0 which in turn pushes a shaft to the left. This shaft is provided with a cotter pin I2 engageable with a lifting lever ||3vpivoted at H4 and acting to lift the snuffer rod 5| from the doty and-dash line position to the full line position and to hold it there so long as the motor and blower are in operation. Snuffer lifting vfor lighting with a match is effected by a lever indicated at H5. With this form of construction all manual operation of the snuifer may be eliminated where one desires to effect the lighting without lifting the snuifer to the extra height, snuffer lifting and lowering being effected solely by .the functioning .of` the blower and motor. v

In the form of construction shown in Figures 13 to 16, inclusive, the motor for operating Ithe blower is indicatedat y|2|l andthe -blower at |-2.|. rI'he blower carries weighted members |22 adapted tolife a shaft |23 `up and down according ,toI the speed of the blower. The blower|2| is mounted in a housing |23 which has four outlets .|24 leading to four burner assemblies, all of which are practically alike. 'Ihe air passing from the central blower chamber to the air chest below .each burner passes through screens indicated at |25 to diffuse it.

Each of the burner units has a wick, wick tube, air' distributor, flame spreader, snufler, flre collar andconstricted collar, as shown inFigures l to 8, and the same reference .characters are ema4 ployed. The Constricted collar 56 is supported onan outer air tube |26 detachably carried on the top of a cup-shaped air chest forming member |21. The outer air tube |26 carries bridging members |28 which support the wick tube. The cup-shaped member |21 supports a bridging strap |29 apertured to receive the snuffer rod guide tube 50 and also carries a pivoted latch |38 adapted to cooperate with the shoulder 8| of the snuffer guide rod, as will be more clear from Figures 15 and 16. l

The latch |30 has a lost motion pinmand-slot connection |3| with a link |32 anda spring |33 interconnects the latch and link so as to hold the latch against the snuifer guide rod when the parts are in the position shown in Figure 16. .The rods |32 are connected with an oscillatory plate |83 so as to be shifted when the plate is turned ,on its axis either bythe handle |34 or by the restoring- Spring |35.

When the parts are in the position shown in Figure 13 in full lines the stove is in the idle or non-burning position and all the latches are lifted off the snuifer supporting rods. When the handle is shifted from the full line position to the dotand-dash line position of Figure 13, the plate |33 is swung to carry the lever |36, which bears on the upper end of shaft |23, to such a position that the end |31 of the lever enters an opening |38 in the fixed plate |38 which covers the blower chamber. A spring |39 acts on this lever to withdraw the lever when the motor stops and the weights automatically lower the shaft |23. The movement of the hand lever |34 has also shifted the links |32 to stress the springs |33, so that the latches |36 are tensioned to enter under the shoulders of the snuier rods when the snuffer rods are lifted. This lifting operation is effected by a control shaft |46 acting on an arm |4| which is adapted to be brought into engagement with the lower end of the snuffer rod. In this construction the oil supply lines may be provided as indicated at |42.

In the arrangement shown in Figure 17 the single burner unit oil stove is supported in any convenient manner, as, for example, by legs indicated at |56. The motor |l, motor housing |52, fan |53 and speed responsive mechanism |54 may be substantially the 4same as that previously described in detail. They are mounted on a vertical axis and the air is blown out through openings |55 in the side wall of the blower housing |56. The air is blown out into an air-chest |51` and passes upwardly vthrough l the inside of a burner tube |58 and through an outer air collar |59, these parts being secured together by bridging members |66. The burner tube |58 carries the usual wick, the air distributor |6| and ame spreader |62. The snuer |63 is carried on a rod |64, and is adapted to be held in normal operating position by a lever |65 pivoted at |66 and acted on by the speed responsive mechanism |54. The parts are shown in Figure 17 in the burning position, and in this position the snuifer |63 is held elevated.

Should the motor stopthe lever |65 will shift to the dot-and-dash line position releasing the snuifer, and the snulfer will drop to extinguish the flame. The snuffer lifter arm is indicated at |67. It is pivoted at |68 and is adapted to be actuated by a button |69. For convenience the wick adjuster and oil supply pipes are omitted from Figure 17. y

Figure 18 showsa heater |10 using two of the burners, such as shown in Figures 1-8, except that the re collar is omitted as there is no need of confining the llame to a small area.

It is obvious that the invention may be embodied in many forms and constructions within the scope of the claims and we wish it tobe understood that the particular forms shown are but a few of the many forms. Various modifications and changes being possible, we do not otherwise limit ourselves in any way with respect v thereto.

What is claimed is:

1. A burner for use in oil stovesv comprising a double walled wick tube, a wick, an air distributor within the wick tube, a flame spreader extending over and spaced from the wick, an airehest communicating with the inside of the wick tube, an outer air tube communicating with the air-chest, spaced fromfthe outside of'the wick tube and carrying a constricted collar terminating close to the upper end of the wick tube,

the wick, releasable rod holding means for sup porting the rod in an elevated position with the snuffer above the wickfwhere it does not interfere with flame propagation, the rod, when released, dropping to bring the snuffer down to cover the top of the wick to out off the ilow of the air supply from the top of the wick and extinguish the llame.

2. A burner as claimed in claim l; wherein' the flame spreader hasv holes', under the snuier to pass air for cooling the snuffer, this `air flowing out under the periphery of the snuffer to further spread the flame."

3. A burner as claimed in claim 1, wherein the wick tube and outer air tube are supported from the top wall of the air-chest, the wall having apertures therebetween to pass air into thechamber formed by the wick tube and air tube.

4. A burner as claimed in claim l, wherein the snuffer is imperforate to pro-tect the wick against fouling by foreign matter dropped'from above.

5. A burner as claimed in claim 1, wherein the snuffer rod extends down through an axially disposed, xed guide tube.

6. A burner as claimed in claim 1, wherein thev snuffer rod extends down through an axially disposed, fixed guide tube, and the holding means for the rod is in the form of a spring pressed latch co-operable with a shoulder on therod.

7. A burner as claimed in claim l, wherein vthe snuffer and flame spreader and air distributor are upwardly removable. .5

8. A burner as claimed in claim 1,- wherein the constricted collar is upwardly removable past the snuffer.

9. A burner as claimed in claim 1 having a fire collar outside the constricted collar terminating adjacent the top of the wick to limit the spread of the flame.

10. A burner as claimed in claim 1 having a fire collar outside the constricted collar termi-' nating adjacent the top of the wick to limit thespread of the flame, the constricted collar beingperforated to pass air into the fire collar. y

11. A burner as claimed in claim 1 having a re collar outside the constricted collar provided with a lower divergent portion and an upper convergent portion extending above the snuffer, the re collar receiving air through holes in the constricted collar and diverting the llame upwardly and inwardly over the snuifer.

l2. A burner as claimed in claim 1, wherein the flame spreader is movable independently of the air distributor and having manually operable means for lifting the snniler and the flame spreader above the normal or burning position,

so as to provide additional space for the escape of air and for the insertion of a match.

13. A burner as claimed in claim 1, wherein the flame spreader is movable independently of the air distributor and having manually operable means for lifting the snuffer and the llame spreader above the normal or burning position,

so as to provide additional space for the insertion of a match, and means controlled from said snu.-

sov

er lifting means'for providing a vent in the air- 4chest to reduce the air being blown past the top of the wick.

14. A burner for use vin oil stoves comprising a wick, a wick tube, an interiorly disposed air distributor, a flame spreader extending over and spaced from the wick, a superposed vertically reciprocable snuffer which in the lower position fits about the wick tube to prevent fiame propagation, means acting from below the air distributor to lift the snuffer to space it from the wick so that air may pass by the wick to propagate a flame, and means below the air distributor for keeping the snufer in said lifted position.

15. A burner such as claimed in claim y14, having manually operable means to lift the snuffer to a still higher elevation to facilitate applying a match to the wick.

16. A burner such as claimed in claim 14, having manually operable means to lift the'snuffer to a still higher elevation to facilitate applying ar match to the wick, said manually operabley means also lifting the flame spreader to space it farther away from the wick.

17. A burner such as claimed in claim 14, wherein the snuffer holding means includes a releasable latch, and the snuffer is disconnectibly connected thereto so as to be upwardly removable.

18. A burner for use in an oil stove comprising a Wick, a wick tube, anl interiorly disposed air distributor` in the upper part of the wick tube,'a

flame spreader, an axially disposed guide tubel below the air distributor, a rod slidably carried in the guide tube, and extending up through the flame spreader and the air distributor, and anl inverted cup-shaped member secured to the rod to move up and down therewith and adapted, when the rod is in its lower position, to extend down about the upper edge of the wick tube.

19. A burner for use in an oil'stove comprising a wick, a wick tube, an interiorly disposed air distributor in the upper part of the wick tube, a flame spreader extending over and spaced from the wick, an axially disposed guide tube below the air distributor, a rod slidably carried in the guide tube, and extending up through the flame,

spreader and the air distributor, an inverted cupshaped member secured to the rod to move up and down therewith and adapted, when the rod is in its lower position, to extend down about the upper edge of the wick tube, the lower end of the rod extending below the guide tube and having a shoulder, and a releasable latch engageable with the shoulder to hold the rod in an elevated position.

20. A burner'such as claimed in claim 19, having a rod lifter engageable with the rod to raise it up to the latching position.

21. A burner for use in an oil stover comprising a. wick, a wick tube, an air distributor, a flame spreader extending over and spaced from the wick, a reciprocable snuffer having three positions, a lower or flame snufling position adjacent the wick, an intermediate or burning position spaced from the Wick and an elevated position for lighting, releasable means for holding it in the intermediate position, and manual means for raising it from the lower position to the intermediate position or from the intermediate position to the upper position.

22. In an oil stove, a wick type burner', means for producing forced draft from below the burner to provide air for combustion, a vertically reciprocable snufer above the Wick, means to hold the snuffer spaced from the wick to permit air to ticle to be heated above the snuffer-and close to it when the snuffer is in positionA for burneroperation so that the heat is applied directly thereto, and means to disablethe snuffer holding means whereupon the snuffer 4drops to cut off the air supply from the wick.

23. An oil stove comprising a burner of the wick type, a superposedvertically reciprocable snuffer which in the lower position fits about the wickv tube of the burner to prevent ame propagation, a blower, a conduit from the blower to the burner, means to lift the snuifer to space it from the wick so that air may pass by the wick to propagate a flame, means to keep the snuffer in the lifted position, and means responsive to cessation of blower operation to release the snuffer holding means so that the snuffer drops to extinguish the iiame.

' 24. An oil stove comprising a burner of the wick type, a superposed,'vertically reciprocable snuffer which in the lower position fits about the wick tube of the burner to prevent ame propagation, a blower, a conduit from the blower to the burner, manually operated means to lift the snuffer to space it from the ywick so that air may pass by the wick to propagate a flame, latch means to keep the snufer in the lifted position, and meansy responsive to cessation of blower operation to release the snuffer latch so that the' snuffer drops to extinguish the flame.

25. An oil stove comprising a burner of the wick type, a superposed, vertically reciprocable snuier which in the lower position fits about the wick tube of the burner to prevent fiame propagation, a blower` a conduit from the blower to the burner, a screen interposed between the blower and burner to diffuse the air, means to lift the snuier to space it from the wick so that air may pass by the wick to propagate a flame, means to keep the snuffer in the lifted position, and means responsive to cessation of blower operation to release the snuffer holding means so that the snuffer drops to extinguish the flame.

26. A forced draft oil stove comprising a wick type burner, a motor operated blower connected to the burner through a conduit to conduct air to the burner, a snuffer disposed above the burner and normally covering the wick, manual means for lifting the snuffer to space it from the wick so that air may pass by the wick to propagate. a flame, a snuifer retaining latch, a latch lifter, and motor operated means for rendering the latch lifter non-functioning while the motor is in operation, the last-mentioned means acting on stoppage of the motor to release the latch so that the snuffer drops to extinguish the flame.

27. A forced draft oil stove comprising a wick type burner, a motor operated blower connected to the burner through a conduit to conduct air to the burner, a snuifer -disposed above the burner and normally covering the wick, manual means for lifting the snuffer to space it from the wick so that air may pass by the wick to propagate aflame, a snuffer retaining latch, a spring urging the latch to latching position, a spring controlled member normally overcoming the latch spring to releasev operating.

28. An oil stove having a front wall, a back wall, an apertured top, grates in the apertures, a burner under each grate, each burner having a wickftube, air distributor and ame spreader, wick adjusters accessible at the front of the stove, a blower, an air-chest connected to the blower and extending past the burners, air passages from the air-chest for forcing air up past the Wick both inside and outside the Wick, and s/numng means blower operation.

RICHARD M. RUNGEQ v ERNEST B. PAscUccI.

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