US1397207A - Gas-stove and fireless cooker - Google Patents

Description

A. F. GLASS.

GAS STOVE AND FIRELESS COOKER.

APPLICATION HLED JUNE'H. 1919.

Patented Nov. 15, 1921.

2 SHEETSSHEET I- 7 Arnold). Glass.

A. F. GLASS.

GAS STOVE AND FIRELESS COOKER.

APPLICATION FILED JUNE 17, 19:9.

1 ,3 9'7, 207 Patented Nov. 15, 1921.

2 SHEETS-SHEET 2.

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ABHGLID F. GLASS, 01 BIRMINGHAM, ALABAIWIL GAS-STOVE AND FIBELESS COOKER.

Application filed June 17, 1919. Serial No. 304,934. I

' siding at Birmingham, in the county of Jetferson and State of Alabama, have invented certain new and useful Improvements in GasStoves and FirelessCookers, of which the following is a specification.

This invention relates to improvements in gas burning stoves.

I have conceived that there is a present need for the development of a gas burning stove which will have many advantages peculiar to a coal or wood burning range and to a fireless cooker, as well as having cer tain important advantages which are peculiar to a gas or oil burning stove.

The objects of my invention are attained by the construction and arrangements of parts which in their preferred embodiment only are illustrated in the accompanying drawings which form a part of this specilication and in which Figure 1 is a vertical sectional view through my improved stove taken on the line 11 of Fig. v

Fig. 2 is a horizontal sectional view taken on the line 22 of Fig. 1.

Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is a detail view of the indicator on the main damper valve. 1

Fig. 5 is a detail sectional view showing one of the main burners associated with the adjacent broiling pan and slide damper tor the adjacent lower oven,

Fig. 6 is a detail view of the main damper valve broken away to show one of the plates to prevent leakage past the damper ends.

Similar reference numerals refer to similar parts throughout the drawings.

As illustrated, the stove comprises a metallic body supported at its corners on legs 1 and provided with the end walls 2 and 3 and the back wall 4. The bottom wall 5 of the stove supports a front wall 6 having lower oven ddors 7 and an upper oven door 9 suitably hinged thereto and adapted to close openings to compartments within the stove. The stove is provided above its main burner chamber with a pair of straight barrel burners 10, each having longitudinal rows of pertorations 11 (see Fig. 5), extending lengthwise on each side along its under portion. These burners project through the front wall of the stove and stop short of the back wall, leaving room at the rear for the coils o1 water heating pipe 12 which enters through the back wall l oi? the stove, passes horizontally to the end wall 2 and thence forwardly along said end wall to the front wall lift-hence return-ingin similar coils back and. forth and leaving through the rear wall. A tro'ugh or tank 13 for catching and holding the water of condensationdripping from the pipe coil 12 is angular in shape so as to underlie the coil and is formed between portions of the adjacent end andloack walls and a vertical partition wall 1 1 which ex tends from the front wall to a point near the back wall, then parallel with said back wall to its point of junction with the oven wall 15, which is parallel with the wall 14 and extends from front to back walls. A screw plug loxis provided in the bottom of the tank 13 for, draining it. The walls 14 and 15 have angle iron supports 17 for a broiling pan 18 which underlies the burners 10.

wall 3 and to the front and back walls 6 and l so as to form an oven inclosing jacket. A suitable warming shelf 2 1 is connected to the back wall 4 to side wall 21 and to a vertical extension 28 of the end wall 2.

The oven wall 15 stops at a level substantially below the top 19 and is there connected to a horizontal partition 29 which extends to the end wall 8 and defines a lower browning oven 30 and a warming oven 31 which are separated by a vertical partition 32 and provided with their respective doors 7. This horizontal wall 29 extends from front to back of the stove and leaves sufiicient space betw'eenit and the top 19 for placing ordi nary gas burners 33 below the eyes in the top 19 adjacent to the wall 21. The burners 10 and.33 project through the front wall 6 and are supplied with gas from the gas main 34 by individual valves 35.

The main oven 36 of the stove is disposed above the wall 29 and .is spaced fromthe walls 21, 22 and 3. The oven has side walls 37 and 38, each formed by spaced metal sheets with a refractory body 39 interposed between them and the same refractory body is used between the sheets forming the top 410 of the oven and also the front and back walls of the oven as indicated at 41, i2 in Fig. This lining of the oven walls is of such character as to be highly eflicient in the retaining of heat so as to adapt the oven for use as a tireless cooker when the circulation ports thereof are closed. The wall 38 of the oven is substantially spaced from the side wall 3 and a vertical partition wall 43 is provided extending from front to back of the stove and from the partitionQ-Q to the level of the top 40 of the oven to which it is connected overhead, thus forming a double chamber for the full length of the right hand side ofthe oven. At the left hand side a vertical partition 44-. extends from the front to back and is connected overhead 'to theoven top 40 and at its bottom stops sub stantially at the level of the stove top 19. This partition 45% is substantially equally spaced from the oven wallv'37 and from the wall 21 and is connected top and bottom with the wall 37 to form a double chamber between 37 and 21. A main damper 45, provided with anasbestos or heat resisting lining 4:6,extends from front to back of the stove with its axis 47 in line with the wall 37 of the oven. This damper is controlled. by a handle l8 which projects through the front 6 of the stove and has a pointer 49 which operates over a cast plate 50 displaying on one side thereof the word Heating and on the other side thereof the word Fire less. By this means the pointer movement responsive to the position of the damper 45 will indicate the position of the damper and show'whether the oven is being operated with-heat or as a fireless cooker. The damper 48 is provided at its inner end with a spring 51 which presses it to the front and holds it in any set position and in order to prevent leakage past the end joints between the damper and the front and back walls of the stove, I mount angled, tapering sealing plates 52; against which the damper seats when in its closed or tireless position and which are connected to the adjacent front or back walls in such manner as to prevent objectionable leakage past the ends of the damper; The damper in its raised position is adapted to close the flue 53 which is formed by the outer chamber between the walls 21 and id but it is normally set in lowcred position to deflect from the oven 36 the products of combustion from the gas burners and conduct the same upwardly and over the oven and to the flue 23. When the damper is raised to close this flue 53 the products of combustion are forced to pass under the damper 45 into the bottom of the oven 36 and thence upwardly through the racks therein and out through the sets of ports arranged along the top of the oven walls 37 and 33 These sets of ports are controlled by slide valves 56 and when the latter are open the products of combustion enter the top of the inner chambers formed between the walls 37 and a l, and 38 and 43; downwardly between these walls and escape through ports 57 and 58 arranged near the bottom of the walls 43 and 44:, respectively, these ports being respectively controlled by the slide dampers 59 and 60. and when the latter are open the products of combustion on the one hand enter the bottom of the chamber between the side wall 3 and the partition 43 and on the other hand enter thelower part of the flue The products of combustion thereafter pass upwardly along the walls 3 and 21 and over the top of the oven, the baliie or partition 61 being provided to cause the products flowing from the wall to pass forwardly in the direction of the arrows 52 before returning to the fine 23. i v

In order to prevent the burners being smothered by the simultaneous'closing of the dampers 4-5 and 56, I provide a relief damper 62, shown moreclearly in Fig. 3, which damper is mounted to slide in a guide frame 63 attached to the inside wall 37 and a. link or rod 61'- selves to connect this damper to 2' clip 65 on the main damper The arran gement is such, that when the main damper is raised to divert the products ofromhust-ion into the oven, the relief damper will move upwardly into position to bring its port into register with the port 66 and the oven wall and thus permit a sufficientdraft to prevent smothering the burners. In 3 the outer sheet of the wall 37 is broken away to show the damper guide frame in elevation.

To permit the flow of heat through the browning oven 30 I provide a series of ports 67 along the top of the wall 15 and a slide damper 68 controls these ports. In the top oven wall 29 near the opposite end from ports 67 I provide outlet ports 69 disposed just in advance in position of the main damper d5. V

In operation, having lighted the main burners 10 if it is desired to bake in the lm er oven 30 the damper 68 is opened and part of the products of combustion pass therethrough and return to the flue above the oven through the ports 69 and then are di verted either through the flue 53 to the stack, or through the oven 36. This lower oven is especially adapted for browning. When the main oven 36 is to be used for ordinary cooking, the damper 45 is raised to its dotted position, Fig. 1, thereby causing the products of combustion from all lighted burners to either flow upwardly through the oven and escape in controlled volume through the ports 56, thence flowing downwardly each side of the oven and back upwardly along the walls 3 and 21 and over the oven to the flue 23, lVhen it is desired to use the oven 36 for tireless cooking the damper 45 is lowered to its full line position, Fig. 1, the slide dampers 56, 59 and G0 are closed thus providing a double sealed chamber on each side to retain the heat :in the insulated oven. At the same time the ordinary cooking can proceed on the stove as the products of combustion will pass off to the flue 23 through the passage 53. I

The warming oven 31 below the oven 36 serves to effectively insulate the bottom of the tireless cooker while the double air chambers as well as the insulation about the sides, top and end walls of the oven 36 will eflectively resist the radiation of heat. v

This invention is notintended to be re stricted in scope to the specific embodiments shown, but contemplates such modifications as come within the spirit and scope of the claims.

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

1. In a gas burning cooking stove, a flue for carrying ofl the products of combustion, an oven, damper controlled means to divert the products of combustion into the lower part of the'oven, and means to draw off the products of combustion from the top of the oven at each side, said means comprising vertical return fiues leading downwardly along each side of the oven and returning back upwardly above the oven, and said damper controlled means comprising a damper adapted in one position to short circuit the products of combustion through the outer return fine and in another position to direct the products through the oven.

2. In a gas burning stove, burners, a top having lids, a main flue extending under the top for the products of combustion from said burners, an oven into the bottom of which said flue opens, walls forming a chamber on each side of the oven, walls forming escape flues extending upwardly along the outer walls of said chambers, damper controlled means to cause a down circulation from the top of the oven through said chambers into said escape flues, and a swinging damper disposed and adapted alternately to open said oven and said escape flue to said main flue.

3. In a gas burning stove, burners, a top having lids, a main flue passing under the top for the products of combustion from said burners, an oven into the lower part of which said flue is adapted to discharge said products of combustion, chambers on each side of the oven closed except for top ports opening into the top of the oven and bottom other position to direct all the products I through one of saidescape flues.

l. In a gas burning stove, burners, a top having lids, a main flue passing under the top for the products of combustion from said burners, an oven into the lower part of which said flue is adapted to discharge said products of combustion, chambers on each side of the oven closed except for top ports opening into the top of the oven and bottom ports opening into escape flues, escape flues which are substantially co-extensive with the oven sides and with said chambers, damper means to regulate the flow. of products through said oven and chambers, the damper means which in one position admits the products to the oven being adapted in its other position to direct all the products through one of said escape flues, and a safety damper movable to open position by said latter damper means, when closing said escape flue, to preserve a suflicient circulation of products through the oven chamber and escape flue to avoid smothering the burners.

5. In a gas burning stove, an oven having a bottom inlet for the products of combustion, oven sides having top outlet ports;

walls forming with each side of the oven a chamber having bottom outlet ports, walls forming with said first mentioned walls and the oven top flues which lead to a stack, damper means to regulate the flow of products of combustion from the oven through said chambers to said flues, and a damper means to direct the products either through said oven and chambers to said flues ordirectly to the flues.

6. In a gas burning stove, an oven having a bottom side inlet for the products of combustion, oven sides having top outlet ports, walls forming with each side of the oven a chamber having bottom outlet ports, the chamber on the oven side having the inlet terminating at said inlet, walls forming.

with said first mentioned walls and the oven top fines which lead to a stack, damper means to regulate the flow of products of combustion from the oven through said chambers to said flues, and a damper means located in said inlet and adapted to direct the products either through said oven and chambers to said lines or directly into the adjacent of said flues.

7. In a gas stove, a main oven having its walls insulated, and damper means to control the flow of products of combustion through the oven, the oven having on each side a double chamber, the sections of which communicate near the bottom of the oven, and through which double. chambers the products of combustion escaping from the oven are caused to flow downwardly and then back upwardly and over the oven top before escaping, and through the outer of which chambers the products of combustion flow, when such products are diverted by said damper means from passage through the oven.

8. In a gas burning cooking oven, burners, a baking oven, a flue for directingthe proclucts of combustion from the burners to the oven, a main damper to control the admission of said products of combustion to the oven, an outlet flue adapted to be closed by said damper when it is set to admit products of combustion in to the oven, there being damper controlled ports for the escape of products of combustionfrom said oven into said flue, and means controlled by said main damper to permit the escape of suffici nt products of combustion from said oven to avoid smothering the burner.

In testimony whereof I afliX my signature.

I ARNOLD F. GLASS. lVitness: V

NoMIE WVELsH.

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