US2127970A - Stove - Google Patents

Description

Aug- 23, 1938- c. F. GAToNs ET AL 2,127,970

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BY faux/QM Patented Aug. 23, 1938 PATENT OFFICE STOVE Charles F. Gatons and Lawrence J. Hausser,

Joliet, Ill., assignors to The Moore Corporation, Joliet, Ill., a corporation of Delaware Application october 2, 1936, serial No. 106,690 4 claims. (c1. 126-36) This invention relates in general to stoves and more particularly to two-fuel oven combination stoves.

A principal object of the invention is the provision of locking mechanism which prevents the operation of either of the fluid fuel burners inthe oven of such a stove unless the secondary air inlet to and the flue outlet from the oven are open, and also prevents the closing of the latter two openings so long as fuel is being supplied to either of the burners.

Another important object of the invention is the provision of a novel two-way valve mechanism for controlling the supply of iiuid fuel to the oven and broiler burners which is particularly adapted for use in conjunction with such locking mechanism.

A further important object of the invention is the provision of fuel supply means for an oven burner pilot light which includes a volume control in the form of a needle valve which is so positioned as to facilitate ready adjustment thereof.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, when taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

In the drawings:

Figure 1 is a front elevation of a stove embodying the invention with the door closure for the control valve removed;

Fig. 2 is a partial rear elevational view of a stove embodying the invention, with part of the clean-out plate broken away to show the flue outlet closing means;

Fig. 3 is a partial side elevational view with part of the end wall broken away to show the position of the control valve;

Fig. 4 is an enlarged detail elevational view showing the ue outlet in open position and the locking means therefor;

Fig. 5 is an enlarged detail sectional view of the two-way valve mechanism;

Fig. 6 is a vertical sectional view of the movable element of the two-way valve;

Fig. 'l is a vertical sectional view of the stationary portion of the two-way valve showing the position of the various port openings; and

Fig. 8 is a vertical sectional view of the volume control mechanism for the oven burner pilot light.

Referring more particularly to the drawings,.a stove of any desired construction is indicated generally by reference numeral II, and comprises a two-fuel oven of well known construction having a door I2 at the front, side walls, and a rear wall I3, which extends laterally to form the rear Wall for the whole stove, a broiler burner adjacent the top, and an oven burner'in the bottom thereof (not shown).

Fuel is supplied to the broiler burner and oven burner by means of pipes I4 and I5, respectively, which are controlled by a two-way valve mechanism, indicated generally by reference numeral I6, connected to a main supply pipe II. The valve AA10 I6 is controlled by a rod I8 suitably mounted for rotation in the frame or walls of the stove II and having an operating handle I9 secured to its forward end, whereby the direction of rotation of handle I9 will determine whether fuel will be sup- 15 plied to the oven burner or the broiler burner.

The construction of the two-way valve mechanism I6 is best illustrated in Figs. 5 to '7. An enlarged bifurcated tubular extension 2I is held in place upon the rod I8 by means of a cotter-pin 20 22. Slidably mounted upon the tubular extension 2| is a spiral spring 23 that bears against the rear wall I3 of the stove I I and upon a washer 24 that is fastened to the extension 2|. The outer or rear end of the extension 2| has an aperture 25 25 therein. A small rod 28 ts within the aperture 25 and is prevented from rotating by means of a screw 2'Il The screw 21 merely prevents the rod 26 from rotating independently of the extension, but is free to move longitudinally due to the bifur- 30 cation of the extension 2 I. A disc-like member 28 is held in place upon the rod 26 by means of an elongated protuberance or key 29 (Fig. 6) extending from the rod 26 into a'suitable key-way in the disc 28.

The disc 28 has a semi-circular groove 3| formed inthe lower portion of the rear surface thereof (Figs. 5 and l6). An outlet portion 32 of the valve mechanism I6 is mounted on the rear end of the rod 26 in contacting relationship with 4o the disc 28, and is provided with ports 33 and 34 (Fig. 7) which communicate with the pipes I4 and I5 respectively. The top portion of the member 32 is provided with a suitable threaded extension. which is screwed into the supply pipe I'I 45 and has an axial bore communicating with a horizontal port or recess 35. The fuel enters from the supply pipe I'I 'through the port 35, but cannot flow to the ports 33 and 34 until the handle I9 and rod I8 are rotated either in a clockwise or 50 counter-clockwise direction, viewing Fig. 1,1the upper portion of the rear surface of the disc 28 normally closing the inner end of the port 35.

It will be seen that when the handle I9 is turned to the right (Fig. 1), the disc 28 will be rotated to 55 bring the groove 3l into register with the ports 35 and 33, and that rotation of the handle in the opposite direction will interconnect ports 35 and 34. The members 32 and 28 are held together by means of a nut 36 fastened to the outer end of the rod 26 and a small spiral spring 31 inserted between the valve mechanism I6 and the extension 2I The inner surface of the member 32 is provided with a counterbored recess within which is mounted a semi-circular annular collar 33 which is suitably keyed to the member 32, as shown in Fig. 7, so as to remain stationary relative to rod 26 and disc 28. The key 29 extends axially into this recess in the member 32, and is adapted t0 abut against the ends of the collar 38 to limit joint rotation of the members I8, I9, 2|, 26 and 28 in both directions.

A bracket member 39 is rigidly mounted on the outer surface of the rear wall I3 by screws 40, and v'is provided with a pair of upwardly and rearwardly extending arms 4I (Fig. 3) for supporting the supply pipe I'I and the rear portion of `the valve mechanism I6. Secured to or formed integrally With the tubular extension 2I is a downwardly extending pin or arm 42 which is held in yielding engagement with the rear surface of an upwardlyextending portion 43 of the bracket 39 by the action of the spring 23. The upper portion 43 of the bracket 39 is provided with a pair of rearwardly extending, substantially vertically disposed, spaced ribs 44 between which the arm 42 rests when the valve I6 is in normal or closed position (Figs. 3 and 5.). The members 23, 42 and 44 therefore function to indicate when the valve mechanism is in closed position and to frictionally maintain the same in such position.

Rigidly secured in any suitable manner to the extension 2| adjacent the valve I6 is one end of a lever 45, to the other end of which is fastened a locking member 46. A damper control lever 41 is slidably mounted in a suitable slot in the upper surface of the stove VI I. Fastened to the lower end of the damper control lever 4l is one end of a lever 48 (Figs. 2-4). The lever 48 has extending laterally therefrom a locking member 49 that co-acts with the locking member 46 in a manner to be later described. Fastened to the lower end of the lever 48 is another lever 5I to which is secured a plate member 52 adapted to close the flue opening 53 in the oven of the stove I I.

A crank arm 54 is pivotally mounted upon the rear wall i3 of the stove I I, one arm of which has a slot 55 which co-operates with a pin 56 secured to the lever arm 5I. Pivotally secured to the other arm of the crank 54 is a rod 5l, the other end of which is pivotally secured to a plate 58 that acts as a control means for the secondary air inlet to the burners in the oven of the stove II.

Attached to the pipe I5 is a pilot `light adjustment device, indicated generally at 59 (Figs. 4 and 8) which comprises an L-shaped member 5I having both ends screw threaded. The one end is screwed into the pipe I5, and the other end has attached to it a small tube 62 that leads tothe oven burner pilot light (not shown). Extending outwardly from' the end threaded into the pipe I5 is an adjusting screw 63 that acts to restrict the flow of fuel into the pipe 62, the screw 63 being held in adjusted position by means of a locking nut 54.

An oven thermostat control device 65 (Fig. 1) is positioned on the front of the stove II near the handle I9. The thermostat control 65 adjusts a temperature responsive element (not shown) which is located Within the oven of the stove II, in the usual manner, and controls the oven burner to keep the oven at a predetermined temperature. It is essential, therefore, to have some means within the oven for lighting the oven burner when the same is turned off by the thermostat and the pilot light which is connected tol the tube 62 is used for this. purpose. It will also be apparent that when the oven burner is completely turned off by means of the handle i9, the pilot light will also be extinguished. But when the handle I9 is turned to supply fuel to the oven burner, the pilot light remains lighted even though the oven burner may be out due to the action of the thermostat devices.

When it is desired to use the oven burner, the damper control lever 4l is moved from left to right (Fig. l) and right to left (Fig. 2). By so doing, the shutter or plate 52 will be removed from the flue opening 53, and the damper 58 will be removed from the secondary air inlet to the oven. The control lever I9 may then be operated, and if it is turned to the left (Fig. l), the locking member 46 assumes the position shown in Fig. 4. The end of the member 46 is then in the path of movement of the plate 49 and prevents closing of either the secondary air inlet or the flue opening. T he fuel will then flow from the main supply pipe I'I through the opening 35 into the groove 3I and out through the port opening 33 into the pipe I5 leading to the oven burner (not shown).

If, on the other hand, it is desired to use the broiler burner (not shown), the handle I9 is turned through ninety degrees to the right of yvertical position (Fig. 1). The gas then comes from the fuel supply pipe I'I through the opening 55 and the groove 3I and out the port opening 34. The gas will then flow through the pipe I4 which in turn is connected to the broiler burner. When the handle I9 is rotated to this position, the right hand end of the locking lever 46 (viewing Figs. `2 and 4) will be in the path of movement of the member 49, and the locking member 46 will act in the same manner as when theoven burner is usedto prevent closing of the secondary air inlet and the flue outlet of the oven.

'When the valve I6 isin closed position so that the fuel supply to the oven burners is cut off, the locking member 46 will be in its inoperative position of Fig. 2 to permit the closing of the secondary air inlet and the ue outlet of the oven. And, when the secondary air inlet and flue outlet are closed (Fig. 2), the locking member or plate` 49 will prevent opening of the valve I6 in either direction so that fuel vcannot be supplied to either the main oven burner or the broiler burner.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description', and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacricing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

We claim:

1. In a stove having a two-fuel oven, a fluid fuel burner in said oven, a secondary air inlet to said oven, and a ue outlet from said oven; control means movable to open and close said secondary air inlet and said flue outlet, valvemeans operable to control the supply of fuel to said burner, and interlocking mechanism for preventing movement of said valve means to open positio-n When said control means is in closed position and for preventing movement of said control means to closed position when said valve means is in open position.

2. In a stove having a two-fuel oven, a main burner and a broiler burner in said oven, a secondary air inlet to saidoven, and a flue outlet from said oven; damper mechanism for opening and closing said air inlet and said flue outlet, a control lever for operating said damper mechanism, a two-way valve, an operating handle for said valve, normally in closed position, and movable in one direction to supply fuel to said main burner and in another direction to supply fuel to said broiler burner, and interlocking mechanism for preventing operation of said handle in either direction when said control lever is in closed position and for preventing movement of said control'lever to closed position when said valve operating handle is in either open position.

3. In a stove having a two-fuel oven, a main burner and a broiler burner in said o-ven, a secondary air inlet to said oven, and a flue outlet from said oven; damper mechanism for openingY and closing said air inlet and said ilue outlet, a control lever for operating said damper mechanism, a two-way valve,'an operating handle for said valve, normally in closed position, and movable in one direction to supply fuel tol said main burner and in another direction to supply fuel tol said broiler burner, and interlocking mechanism for preventing operation of said handle in either direction when said control lever is. in closed position and for preventing movement of said control lever to closed position when said valve operating handle is in either open position, said mechanism comprising a plate member secured to said control lever, and a curved arm operatively associated with said valve handle. v

4. In a stove having a two-fuel oven, a main burner and a broiler burner in said oven, a secondary air inlet to said oven, and a flue outlet from said oven; damper mechanism for opening and closing said air inlet and said flue outlet, a control lever for operating said damper mechanism, a two-Way valve mechanism for controlling the supply of fuel to both of said burners and including an operating shaft, a locking lever operatively connected with said shaft, and a locking lever connected to said damper control lever, whereby operation of said valve mechanism Will be prevented when said damper mechanism is in closed position and movement of said damper mechanism to closed position will be prevented when said Valve mechanism is in either of its open positions.

CHARLES F. GATONS. LAWRENCE J. HAUSSER.

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