US1347586A - Stove - Google Patents

Description

L. MITCHELL.

STOVE.

APPLICATION FILED DEC. 6. 1919. 1,347,586. 4 Patented Jul 27, 1920,

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L. MITCHELL.

STOVE.

APPLICATION FILED DEC. 6. 1919.

Patented July 27, 1920.

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L. MITCHELL.

STOVE.

APPLICATION FILED use. 6. 191m Patented July 27, 1920.

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L. MITCHELL.

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APPLICATION FILED DEC. 6 I919.

Patented July 27, 1920.

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LEON MITCHELL, OF DORCHESTER, MASSACHUSETTS.

STOVE.

Specification. of Letters Patent. Pafiented July 27, 1 920,

Application filed Ilecember 6, 1919. Serial No. 344,220.

To all whom it may concern:

Be it known that I, LEON MITCHELL, a citizen of the United States of America, and a resident of Dorchester, in the county of Suffolk and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Stoves, of which the following is a specification.

This invention relates to stoves and has for its object the production of a stove particularly adapted for frying doughnuts.

The invention consists primarily in means whereby the doughnuts may be fried without requiring them to be turned over.

The invention further consists in certain novel features of construction and arrangement of parts which will be readily understood by reference to the description of the drawings and to the claims to be hereinafter given.

For the purpose of illustrating the invention, one preferred form thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and the invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described, except as required by the scope of the appended claims.

Of the drawings:

Figure 1 represents a front elevation of a stove embodying the principles'of the present invention.

Fig. 2 represents a side elevation of the same.

Fig. 3 represents a vertical section of the same on line 3, 3, on Fig. l. e

Fig. 4 represents a horizontal section of the same on line 4, 4, on Fig. 1.

Fig. 5 represents a vertical section of the drip pan adapted to be positioned on said stove.

Fig. 6 represents a plan of the depositing pan for supporting the doughnuts, showing the handles removed.

Fig. 7 represents a vertical section of the air-controlling valve and the nozzle for supplying gas to the burner.

Fig. 8 represents a horizontal section of the same on line 8, 8, on Fig. 7, and

. Fig. 9 represents a plan of theburner and I the baffle plate extending from the rear edge thereof. 7

Similar characters indicate like parts throughout the several figures of the drawings.

In the drawings, 10 is a frame preferably made of sheet metal and supported upon legs 11, 11.

Extending upwardly from the rear of the frame 10 are angle bars 12 supporting a hood 13 having brace members 14 extending from the forward end thereof to the angle bars 12, all as clearly shown in the drawings.

The rear wall of the hood 1?) has extending therefrom, a tubular member 15, the

lower end of which communicates with the rear wall of the frame 10 thereby providing a passage from the upper portion of the hood 13 to the interior of the upper portion of the frame 10.

In the upper rear portion of the frame 10 is a shelf 16 having an upwardly projecting rear wall 17 from which extends a pipe 18. r

This pipe 18 is centrally disposed for the entire length of the tubular member 15 and its upper end projects into and through the cover of the hood 13, all as clearly indicated in Fig. 3 of the drawings.

In the forward portion of the frame 10 is a burner 19 having a perforated upper plate 20 and from which extends downwardly a tube 21 having air passages 22 formed in the lower end of the side wall thereof. v

A cup-shaped valve member 23 surrounds the lower end of the tube 21 and has side openings 24 therein which are adapted to register With the openings 22 to admit air to said tube.

This valve 23 is provided with an arm 25 having pivoted thereto, at 26, an operating bar 27 projecting through the front wall of the frame 10 and having an upturned end 28 which is adapted .to be grasped by the operator when it is desired to operate the valve 23 and control. the supply of air to the tube 21 leading to the burner 19.

Within the lower end of the tube 21 is positioned a perforated ball-shaped tip or nozzle 29 threaded to a nipple extending upwardly from a gas pipe through the bottom of the cup-shaped valve member 23.

The gas pipe 30 extends through the optending through both ends of the frame 10 with the branch pipe 31 extending through the front of the same, is to provide a means whereby the stove when located maybe readily connected in the most direct manner to the nearest gas supply pipe.

The gas escaping through the perforations in the nozzle or tip 29 will pass up- 'wardlythrough the pipe 21 to the burner 19' and through the perforations in the upper plate 20 thereof.

By manipulating the operating handle 27, 28, the valve 23 may be moved about its axis to admit the required amount of air through the openings 24 and 22 to the interior of the tube 21 in order to attain the proper combustion for the required degree of heat.

In the tube 21 is a revoluble fan 35 which will be rotated at a high rate of speed by the upward rush of the gas through the tube 21 and will thoroughly mix the gas and air passing therethrough.

As a result, the proper mixture of gas and air will create a blue flame above the perforated top plate 20 of the burner 19 giving an intense heat suflicient to perform the work required.

Extending rearwardly from the burner 19 is a baffle plate 36 having its rear end 37 extending upwardly as indicated in Fig. 3 of the drawings, and over which the products of combustion must pass to the discharge pipe 18 therefor. r

In the upper portion of the frame 10 is positioned a kettle 38, the bottom of which is slightly above the upper edge of the upturned end 37 of the baffle plate 36.

' The only escape for theheat generated by the burner 19 is toward the rear over the upper edge of the member 37 to the pipe 18 as indicated by the arrows in Fig. 3 of the drawings and as a consequence, the entire bottom of the kettle 38 is subjected to said heat.

This kettle 38 has its bottom depressed at the center thereof as indicated at 40 and has extending from this depressed central portion a pipe 41 extending across the burner 19 and through the front wall of the frame '10.

thereto at 45.

The outer end of the pipe 41 is provided with a valve 42 which, when opened, permits the'kettle to be drained. This kettle is filled with fat to the line 43 on Fig. 3 of the drawings.

When the stove is not in use, the kettle is closed by means of the cover 44 hinged This cover 44 will prevent dirt and other foreign substances collecting in the fat.

When the device is in use, the cover 44 is moved back to the position shown in Fig. 3 of the drawings.

The kettle 38 has pivoted thereto, at 26, a screen 47 having a downward extension 48 at its forward end and a forwardly projecting handle 49 secured thereto.

lVhen it is desired to use the stove for the purpose of frying doughnuts, the operator moves the cover 44 into the position shown in Fig. 3, seizes the handle 49 and moves the screen 47 about its pivot 46 into an open position and then seizes the handles 50 of a perforated depositing pan 51 on which has been positioned a plurality of rings of dough to be fried, and places said depositing pan in the bottom of the kettle 38 in the position shown in Fig. 3.

' As the bottom of the kettle 38 is inclined downwardly toward the central depression 40 and the pan 51 is straight, there will be considerable fat between said pan and bottom.

The screen 47 is then moved into the position shown in said Fig. 3 with the lower edge of the downward extension 48 resting on the kettle bottom.

This screen 47 serves the purpose of a sinker and retains the rings of dough wholly immersed in the fat.

Owing to the fact that the rings of dough are wholly immersed with the entire surface thereof in contact with the 'fat in the kettle 38, it is obvious that during the frying operation it will be unnecessary to turn over the rings of dough as is usually done in frying doughnuts.

When the rings of dough have been once submerged and retained below the upper level of the fat by means of the screen 47 and subjected to sutlicient heat to fry the same, the entire surface of all of the doughnuts thus fried will present a uniform color throughout. r

Y WVhen the frying operation has been'completed, the screen 47 is lifted and the depositing pan 51 with the doughnuts thereon will then be removed from the kettle 38 and placed upon a suitable'rack to permit the doughnuts to cool.

Upon the face of the frame 10 is a device 52 to indicate the temperature of the heat in the kettle 38.

The heat from the kettle 38 will move upwardly into thehood '13 and will escape tions 5?.

through the opening inthe rear thereof into the tubular member 15 through which it will pass downwardly around the smoke pipe 18 into the interior of the frame 10 through the lateral branch pipes 53 provided for this purpose.

This air will become more and more hea ed as it passes downwardly around the pipe 18 through which the heated products of combustion are escaping.

As a consequence, the air which is admittedv to the interior of the frame 10 through the branch pipes 53 is in a thor oughly heated condition and passes through the openings 24: and 22 into the tube 21 to the burner 19. V

In case any of the combustionable material fails to be wholly consumed, this unconsumed material will rise with the heated air into the hood l3 and be returned to the burner 19 where it will be consumed.

Access to the burner 19 is provided through an opening in the front of the frame 10 which opening is normally closed by the door 5% having a suitable locking device 55 therefor.

From time to time it is necessary to drain off the fat in the kettle 38 and provide a new supply of fat for said kettle. When the new supply of fat is cold, the device becomes inoperative until the fat attains the required temperature, thus causing considerable loss of time which is objectionable.

To overcome this objection, the present device is provided with a receptacle 56 normally positioned in a compartment in the lower part of the frame 10 immediately beneath one end of the burner and subject to the heat therefrom.

This receptacle 56 is separated from the interior of the frame 10 by means of parti- This receptacle 56 contains a reserve supply of fat which is always in heated condition ready for use in the kettle 38.

The temperature of this fat is substantially the same as that within the kettle so that when a supply thereof is'transferred into the kettle there is very little delay in the frying operations.

The pan or receptacle 56 is provided with a handle 58 by which said receptacle may be pulled outwardly from the frame 10 when access to the fat therein is desired.

The front face of this receptacle has secured thereto. a U-shaped member 59 having casters 60 at the bottom thereof resting upon the floor and providing a support for the forward end of the receptacle 56 when it is partially withdrawn from the frame 10.

The depositing pan 51 is made of sheet metal with a plurality of upwardly extending annular ridges 61 of a shape to receive the rings of dough.

The pan 51 has a plurality of perforations 62 therethrough, one centrally disposed in each annular ridge 61.

On each side of the frame 10 are hook members 63 adapted to receive a drip-pan 6- the outer end of which is provided with braces 65 extending downwardly in an inclined position to the lower hook member 63 as indicated in Fig. 5 of the drawings.

1V hen the depositing pan 51 is removed from the kettle 38 with the doughnuts thereon, said pan may be deposited upon the drippan 6% and the 'drippings from the doughnuts will be collected in the bottom of the drip-pan 64 from which they may be drained through an outlet 66 into any suitable kettle or other receptacle. 7

It is believed that the operation and many advantages of the invention will be readily understood without further description.

Having thus described my invention, I claim:

1. In a device of the class described, a kettle for fat provided with a flat bottom hav ing a central depression therein; a screen pivoted to a wall thereof slightly below the top thereof and below the upper surface of the fat contained therein; a frame in the open top of which said kettle is adapted to be positioned; a heating device within said frame beneath said kettle; and a drain pipe for said kettle extending from said depression through the wall of said frame.

2. In a device of the class described, a kettle for fat provided with a flat bottom hav ing a central depression therein; a screen pivoted to a wall thereof slightly below the top thereof and below the upper surface of the fat contained therein; a frame having an open top adapted to be closed by said kettle when positioned therein; an exhaust pipe from the rear of said frame; a heating device within said frame and beneath "the front of said kettle; anda drain pipe extending from said depression over said heating device and through the wall of said frame. o

3. In a device of the class described, a frame open at the top; a kettle adapted to be positioned in said upper end; a burner beneath said kettle; a tube depending therefrom having side openings in the lower end; a cup-shaped member fitted over the lower end of said tube and having side openings therein; a gas pipe beneath said cup-shaped member and having an extension projecting through the end of said member; a perforated hollow ball threaded to said extension and preventing end movement of said cupshaped member; and means for rotating said cup-shaned member about the axis of said tube.

4. In a device of the class described, a frameopen at the top; a kettle adapted to V be positioned in said upper end; a burner beneath said kettle; a tube depending therefrom having side openings in the lower end;

a cup-shaped member fitted over the lower end of said tube and having side openings therein; a gas pipe beneath said cup-shaped member and having an extension projecting tnreugh the end of said member; a perforated hollow ball threaded to said extension and preventing end movement of said cupshaped member; an arm radiating from said cup-shaped member; and an actuating member pivoted to the outer end of said arm and extending through the front of said frame.

5. in a device of the class described, a ame open at the top; a kettle adapted to be positioned in said open end; a screen in said kettle positioned just below the upper surface of said fat; an elongated hollow burner beneath said kettle having a perforated top plate extending substantially the ent're width of said kettle; means for supplying said burner with a mixture of gas and air; a baffle plate extending rearwardly n the rear edge of said burner and having an upturned rear wall; and a discharge be for the products of combustion at the rear of said baille plate.

in a device of the class described, a frame open at the top; a kettle adapted to be positioned in said open end; an elongated bellow burner beneath said kettle having a perforated top plate extending substantially entire width of said kettle; means for supplying said burner with a mixture of gas and air; a baffle plate extending rearwardly from the rear edge of said burner and having an upturned rear wall; a partition fitted to the rear upper end of said frame with its front portion extending beneath said baffle plate; and a discharge pipe for the prodof combustion extending from the rear all of said partition through said frame.

'I'. In a device of the class described, a frame open at the top; a kettle adapted to be positionedin said open end and having its bottom inclined downwardly to the center; a screen positioned in said kettle slightly below the top thereof but below the surface of said fat; a burner beneath said kettle;

drain pipe leading from said'kettle through a side wall of said frame; and a removable pan resting on the outer portions of said bottom and adapted to support the material to be operated upon.

8. 111 a device of the class described, a frame open at the top; a kettle adapted to no positioned in said open end and having its bottom inclineo downwardly to the center; a screen positioned in said kettle slightly bclew the top thereof but below the surface of said fat; a burner beneath said kettle; drain pipe leading from said kettle through a side wall of said frame; and a removable perforated pan resting on the outer portions of said bottom and adapted to support the material to be operatedupon.

u. in a device of the class described, a frame open at the top; a kettle adapted to positioned in said open end and having its bottom inclined downwardly to the center; a screen positioned in said kettle slightly below the top thereof but below the surface ef'said fat; a burner beneath said kettle; drain pipe leading from said kettle through a side wall of said frame; and a removable perforated pan resting on the outer portions of said bottom and adapted to support the material to be operated upon, each perforation being surrounded by an annular-ridge.

O. In a device of the class described, a frame open at the top; a kettle adapted to be positioned in said open end and having its bottom inclined downwardly to the centcr' a screen positioned in said kettle slightly J the top thereof but below the surface 0 said fat; a burner beneath said kettle; dr in pipe leading from said kettle through a side wall of said frame; a removable pan resting on the outer portions of said bot tom and adapted to support the material to be operated upon; and handles secured to the opposite ends of said pan.

Signed by me at 746-7 Old South Bldg,

Boston, Mass, this 4th day of December, 1919.

LEON MITCHELL. Witnesses VVALTER E. LOMBARD, NATHAN C. LOMBARD.

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