US941974A - Stove. - Google Patents

Description

E. R. GAHOONE.

STOVE.

APPLIGATION FILED APR.3,1909.

9411 9'74;a Patented Nov. 30, 1909.

2 SHEETS-SHEET 2. AZAZ sage of air to the interior of the fire pot.

EDWIN R. OAI-IOGNE, OF

SUMMIT, NEW JERSEY.

STOVE.

Specification of Letters Patent.

Patented Nov. 30, 1909.

Application filed April 3, 1909. Serial No. 487,774.

T all whom it may concern:

Be it known that I, EDWIN R. CAHOONE, a citizen of the United States, residing at Summit, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Stoves, of which the following is a specification.

This invention relates to improvements in stoves.

The object of the invention is to provide specific means for changing the draft, that it may be made director indirect, according to the state of combustion.

The invention also relates to the details of construction, and the specific arrangement of parts, all of which will be herein after referred to and particularly pointed out in the claims.

In the drawings :Figure 1 is a vertical section of my improved stove. Fig. 2, is a horizontal sectionon the line 22, Fig. 1 the grate being omitted. Fig. 3, is a section on the line 3-3 Fig. 1. Fig. 4, is a partial front elevation. Fig. 5, is a detail side elevation. Fig. 6, is a detail view of a portion of the grate frame and the rear lining. Fig. 7, is a detail cross section on line 7'. Fig. 4.

T 1e numeral 1, indicates'a casing, inclosing an ash pit 2, fire pot, oven 4, and the inner draft flues. The fire pot is composed of sections 5, corrugated on their inner faces, and having at their lower ends a plurality of fingers 7, and flanges 8, and 9, at their upper ends. The front fire pot section 5, is spaced from the front of the casing to form an air passage 10, and is supported by one or more bolts 11. The side and rear sections have ribs which bear against the casing to properly space them to form the air passages. The said front section is formed with openings 5, to afiord communication be tween the passage 10, and the interior of the fire pot for the introduction of heated air to promote combustion. A damper 13, is arranged in the stove front opposite passage 10, for admission of air through openings 13. The side lining sections 5, are spaced from the stove sides, by a series of ribs, and are provided with openings 15, for the pas- The rear lining section 16, terminates a short distance above the grate, and is formed with a plurality of depending fingers 17, formed with seats 18, and is spaced from the. oven 4, to provide a passage way 19.

20, indicates the grate, supported in a grate frame 21, mounted in the casing 1. The grate frame has an extension 22, located di rectly under the passage way 19, and intermediate this extension and the body of the grateframe are upwardly projecting fingers 23, reduced at their upper ends to fit in the seats 18, of the rear lining. Projecting out wardly from the grate frame and in alinement with the fingers 23, are spaced apart horizontal fingers 24. These horizontal fingers, together with similar fingers 25, on the inner front portion of the frame form a continuation of the grate proper. The upwardly projecting fingers 23, are spaced apart, to provide openings 26, for the passage of the products of combustion. These openings 26, are regulated by a slide damper 27, operating in guideways on the inside of the fingers in the passageway 19. The eX- tension 22, is also regulated by a slide damper 29, operating in ways formed on the extension. These openings 28, may be employed for a dual purpose I may use them for the introducing of air from the ash pit to augment the combustion in the passage way 19, or, they may be used when it is desired to remove the soot or other accumulated foreign matter in the bottom of the passageway.

The upper end of the rear lining section is formed with a seat, to receive the rounded end 30, of a damper 31. Damper 31, is designed to either close the upper open end of the passageway 19, or cut off the flue 32, from the fire pot. When positioned to out ofi the escaping products of combustion from the fire pot the end of the damper abuts against a stop 33.

The stove top is disposed above the fire pot and oven, to form an inner draft flue 32, and at the front is a door 34, having an elongated mouth 35, for the introduction of air above the bed of fuel. Fitting over the mouth is a slide 36, formed with openings 37, and sliding in Ways 38, on the door. The door ,is formed at opposite points adj acent the ends of the mouth with air inlet openings 39. The damper may be moved in the ways to cause the openings therein, and the openings 39, in the door to register to admit air to the mouth 35. Mica may be placed in the damper to allow the operator to observe the condition of the fire.

Just in rear of the door 34 and in front of the inner draft flue 32, is an air heating chamber 40, abutting against the under side of the stove top, and being curved on its bottom, and formed in its front edge with a plurality of varying size openings 41, for the introduction of air into the space formed between the door and the flanges 8, and 9, of the front lining sections 5. The air heating chamber is preferably supplied with air from the ash pit 2, by two ducts 42, formed at their upper edges with seats to receive the bottom of said air heating chamber. The ducts are formed with the side sections 5, to warm the air before reaching the chamber. A hinged depending shield 44, is mounted directly under the air heating chamber, and is provided with a series of fingers 4L5. This shield is for the purpose of reducing the width of the space between the air heating chamber and the top of lining sections, to insure of the air coming through the mouth 35, being deflected downward and thence allowed to rise upward toward the top of the flue. Air may be admitted in the top of the air heating chamber through openings 4L6, regulated by a damper 47, should the supply from the ash pit not be sufficient.

In the side of the casing is an opening 48, provided with a damper 4:9, to aiford direct communication with the exit flue 50, located on the side of the stove. The inner draft flue extends around the oven and terminates at the partition 51. Near the partition 51, the inner draft flue communicates, by an opening 52, with an extension 53, of the exit flue 50.

In the side of the casing adjacent the bottom of the fire pot and the ash pit is an opening 54, in which operates a damper 55. This opening is substantially the width of the fire pot, and is for the purpose of directing the products of combustion directly to the exit flue. The damper 55, has a spindle which extends out through the extension to afford a convenient means of operation.

The partition 51, which forms one wall of the oven, is provided with openings 58, over which operates a damper 59. By manipulating the damper, odor and surplus heat, in the oven may escape through the open ings to the fire pot, or the exit flue.

As soon as the excessive smoke, incident to making a new fire passes off, damper 55, may be closed, and the damper 31, turned to close the passageway 19 and the products of combustion are directed through the inner draft flue 32, to the exit flue. WVhen the parts are in this position the structure operates as an up draft stove. If the damper 49, is open, the products of combustion will pass directly to the exit fine, but if it be desired to prolong the retention of the proclucts of combustion in the stove, or if the oven is to be heated, damper 4:9, is closed and the products of combustion will then pass around the oven, and escape to the exit flue through opening 52. The products of combustion may be directed downwardly through the fuel, and into the passageway 19, by operating the damper 31, to cut off the flue 32, from the fire pot, and opening the damper 27, and also closing the damper 55. The products of combustion then pass through the openings 26, into the passageway 19, heated air being added to the bottom of the fire pot from the ash pit through the grate. The heated air introduced at this point increases the combustion, as the gases pass into the passageway to the flue 32. If the supply of air in the bottom of the fire pot is insufiicient the damper 29, may be opened, this of course being regulated according to the conditions.

By the system of dampers described, I provide means for permitting quick escape and burning of the dense smoke when the fire is started, and also provide an economical structure whereby the products of combustion may escape directly or indirectly to the atmosphere.

The particular construction of the fire pot is of great importance in a stove structure of the type described. Air enters the ash pit through the dampered openings 60, and necessarily becomes somewhat heated. In this state the heated air passes up into fire pot and into the passages around the same. Because of the passages being in proximity to the fire pot, the air is highly heated, and in this state passes through the openings 15, and mingles with the rising gases and enhances the combustion. Part of the air from the ash pit passes up through the body of fuel, and part up through the passages so that when the products of combustion reach the fine, the various streams of air are intermingled which produces a very high grade of combustion. Mingled with the heated air from the ash pit is the air introduced in the passage 10, through the openings 13. Then as the mingled air and gases arise in the fire pot, a supply of varying streams of heated air is introduced thereto from the air heating chamber to.

WVhat I claim is:

1. In a stove, the combination with a casing, a fire pot spaced from the casing to provide passages, the passages on the sides and front being closed at the upper ends and open at the bottoms, and communicating with the fire pot, an oven spaced from the top, rear and bottom of the casing and the rear of the fire pot, the space at the rear of the fire pot communicating with the bottom of said fire pot, and the space at the top and rear and bottom of the oven forming an inner draft flue which communicates with the fire pot and the space in rear of the latter, an

ash pit below and communicating with the passages and fire pot, means for admitting air to the ash pit; an exit flue having an extension formed with an opening which communicates with the ash pit, the exit flue communicating with the inner draft fiue at a point above the fire pot, a damper controlling the opening above the fire pot, a damper at the junction of the inner draft flue, and the passage at the rear of the fire pot to control the escape of the products of combustion, and a damper controlling the opening between the ash pit and extension.

2. In a stove, the combination with a casing, a fire pot spaced from the casing to form passages said passages on the front and sides of the fire pot communicating with the latter at the bottom and are closed at their upper ends, the passage at the rear of the fire pot communicating with the bottom of the latter and an inner draft flue, an ash pit, an inner draft flue formed in part by the casing and communicating with the top of the fire pot, an exit flue communicating with the ash pit and with the inner draft flue, a door adjacent the draft flue, means for introducing a regulated supply of air through the door, an air heating chamber adjacent the door and above the fire pot, said air heating chamber having openings to introduce streams of air toward the door, ducts communicating with the ash pit and the air heating chamber, said ducts directing air from the ash pit to the chamber, means for introducing air to the ash pit, means for introducing air to the passage adjacent the front of the fire pot, and a damper above the fire pot for regulating the passage of the products of combustion from the inner draft fine to the exit fiue.

3. In a stove, the combination with a casing, an ash pit, an exit flue, a fire pot spaced from the casing to form air heating passages, said fire pot having openings to afford communication between the passages and the interior of the fire pot, an air heating chamber located above the fire pot and formed with exit openings, ducts communicating with the ash pit and the air heating chamber to supply air to the latter, a swinging shield suspended from the air heating chamber, means for introducing air to the fire pot in front of the air heating chamber, means for causing the products of combustion to pass down through the fuel, to the exit flue, or upwardly through the fuel to the exit flue.

l. In a stove, the combination with a casing, formed with an opening below the fire pot, a fire pot spaced from the casing to provide passages around the fire pot, said passages communicating with the fire pot at their lower ends, the passage formed in the rear of the fire pot being open at the top, an ash pit below and communicating with the passages and fire pot, means for admitting air to the ash pit, an inner draft flue formed in part by the casing and communicating withthe top of the fire pot, a damper above the fire pot, said damper being positioned to cut off communication of the inner draft fine, and the fire pot, or the top of the passage back of the fire pot from said inner draft fiue, an exit flue communicating with the inner draft fiue above the fire pot by an opening formed in the casing, a damper controlling said opening, and a damper cooperating with the opening in the casing below the fire pot to control the exit of the products of combustion to the exit flue.

5. In a stove, the combination with a casing, an oven, spaced from the casing to form an inner draft flue, a fire pot spaced from the oven to form a passageway the lower end of the fire pot which is spaced from the oven having a plurality of spaced apart fingers, the spaces between the fingers forming openings between the fire pot and the passageway the inner draft fiue communicating with the fire pot and the passageway, a damper for directing the products of combustion from the fire pot to the inner draft fine or downwardly through the openings at the bottom of the fire pot into the passageway to the inner draft flue, means for introducing air to the bottom of the fire pot adjacent the openings leading into the passageway, and means for introducing streams of heated air to the sides of the fire pot.

G. In a stove, the combination, with a casing an oven spaced from the casing to form an inner draft flue a fire pot spaced from the oven to form a passageway which communicates with the bottom of the'fire pot, a frame in the bottom of the fire pot, said frame having openings in line with the passageway, a damper cooperating with said openings, a grate mounted in the frame, spaced fingers formed at the lower rear portion of the fire pot adjacent the openings in said frame, an exit flue which communicates with the inner draft flue through an opening formed in the casing, a damper to regulate the said opening, a damper to direct the products of combustion from the fire pot to the inner draft flue, or downwardly in the fire pot to the passageway, and means for introducing heated air to the bottom of the fire pot.

7. In a stove the combination with a casing, an oven, spaced from the casing to form an inner draft fine, a fire pot having spaced fingers at the lower rear portion and the wall above said fingers being spaced from the oven to form a passageway, which communicates with the bottom of the fire pot, an exit flue communicating with the inner draft flue by two openings in the casing, one of said openings being above the fire pot and the other said opening being below the fire pot, a damper in the upper opening, a damper adjacent the inner draft flue to shut off direct communication with the fire pot or close the upper end of the passageway, a

damper at the lower end of the passageway to control the passage of the products of combustion entering the bottom thereof, through the spaces formed between the fingers, an ash pit, and means for supplying air to the ash pit, said air passing through the bottom of the fire pot and mingling with the products of combustion therein.

8. In a stove, the combination with a casing, formed with an opening adjacent the bottom of the fire pot, an oven spaced from the casing to form an inner draft flue, a fire pot having one wall spaced from the oven to form a passageway, which communicates with the bottom of the fire pot, an exit flue communicating with the inner draft flue by two openings in the casing, one of said openings being above the fire pot, and the other said opening being below the fire pot, a damper in the upper opening, a damper located adjacent the inner draft flue to shut off direct communication with the fire pot or close the upper end of the passageway a damper at the lower end of the passageway to control the passage of the products of combustion entering the bottom thereof, an ash pit having an opening in its side wall, and means for supplying air to the ash pit, said air passing through the bottom of the fire pot and mingling with the products of combustion therein, and an extension on the exit flue which communicates with the opening in the casing adjacent the bottom of the fire pot, and a damper in said opening to control the passage of the products of combustion passing to the exit flue.

9. In a stove, the combination with a casing, an oven, spaced from the casing to form an inner draft flue, a fire pot having one of its walls'spaced from the oven to form a passageway, a frame in the bottom of the fire pot with openings adjacent the passageway, said frame having spaced fingers between the grate and the openings in the frame a grate supported in the frame, the spaced wall of the fire pot being supported on the spaced fingers of the frame, a damper controlling the spaces formed between the fingers, a damper controlling the openings in the frame in the rear of the fingers, a damper at the upper end of the passageway to shut off the inner draft flue from direct communication with the fire pot or close the upper end of the passageway, means for introducing air to the bottom of the fuel in the fire pot, an exit flue communicating with the inner draft flue by an opening formed in the casing, and a damper in said opening.

10. In a stove, the combination with a casing, a fire pot having spaced fingers at the lower end of the rear portion, an oven spaced from the rear wall of the fire pot to provide a passageway the products of combustion when passing through the passageway contacting directly with the wall of the oven, said oven being also spaced from the casing to form an inner draft flue which communicates with the fire pot and passageway, the spaces between the fingers forming openings to afford communication between the fire pot and passageway, a damper for directing the products of combustion from the fire pot to the inner draft flue or downwardly through the fire pot and openings between the fingers to the passageway and thence to the inner draft flue, means for introducing air to the bottom of the fire pot adjacent the openings formed by the fingers, and means for introducing streams of air to the front and sides of the fire pot above the level of the said openings, and means above the aforesaid means for introducing air downwardly toward the fuel in the fire pot.

11. In a stove, the combination with a casing having an opening above the fire pot and an opening adjacent the bottom of the fire pot and ash pit, an oven spaced from the casing to form an inner draft flue, a fire pot spaced from the oven to form a passageway, the lower end of the fire pot which is spaced from the oven having a plurality of spaced apart fingers, the spaces between the fingers forming openings between the fire pot and the passageway, the inner draft flue communicating with the fire pot and the passageway, a damper for directing the products of combustion from the fire pot to the inner draft flue or downwardly through the openings at the bottom of the fire pot into the passageway to the inner draft flue, means for introducing air to the bottom of the fire pot said air passing into the fire pot and to the openings leading into the passageway, an exit fine having an extension, the extension communicating with the opening adjacent to the fire box and ash pit, the exit flue communicating with the inner draft flue by the opening in the casing above the fire pot, and a damper for controlling the latter opening.

In testimony whereof I aflix my signature in presence of two witnesses.

EDIVIN R. CAHOONE.

Witnesses:

Sana M. FLEMING, Evnnn'r'r T. SPINNING.

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