US1503276A - Automatically-operative controlling mechanism for heaters - Google Patents

Description

Lsfiy as? m4. 1,503,276

E. W. MARVEL AUTOMATICALLY OPERATIVE CONTROLLING MECHANISM FOR HEATERS Origina} Filed May 26. 1920 iwazzi Patented July 29, 1924.

NIB

1,503,276 FFICE.

AUTOMATICALLY-OPERATIVE CONTROLLING MECHANISM FOR HEATERS.

Application filed May 26, 1920, Serial No. 384,250. Renewed June 12, 1923.

T 0 all whom it may concern Be it known that I, EDWARD VVILLEY MAR- VEL, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Improvement in Automatically-Operative Controlling Mechanism for Heaters, whereof the following is a specification, reference being had to the accompanying drawing.

- Ordinarily, the gas supply to the several burners of a cooking range is only manually controlled by individual gas cocks local to the respective burners so that in order .to prevent waste of gas it is necessary for the operator to turn the gas on or off in correspondence with placing utensils on or off of the range; a precaution which is frequently neglected. Therefore, it is an object and effect of my invention to provide means to automatically control the supply of gas to a burner in accordance with whether the burner is 1111186 or not. As

hereinafter described, such control is effected by providing a valve mechanism in v such position that it is automatically operated to admit gas to the burner, when a cooking utensil, sadiron, or other device is placed in positionto use the heat from the burner and, when said heat using device is removed, the supply of gas is automatically shut ofi or diminished by the operation of said valve mechanism consequent upon the.

- off. Moreover, as hereinafter described, my

invention may be so constructed and arranged as to be operated by the opening and closing of an oven door. That is to say; it may be arranged to increase the supply of gas when the oven door is shut and decrease or entirely shut off the supply of gas when the oven door is opened, in accordance with the condition to which the device is adjusted. I

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified.

In said drawing; Fig. I is a fragmentary, sectional view of a gas range having conveniefit embodiments of my invention applied thereto viz, one shown in operative relation with a frying pan and another indicated in operative relation to an oven door.

Fig.'II is a fragmentary plan view, partly in section, showing two valve bodies such as are indicated in Fig. I, each including 1 plate is operatively engaged when in the position shown in Fig. I.

Fig. V is aperspective view of the detachable clamp ring indicated in Fig. I encircling the burner tube, upon which said tappet lever is fulcrumed.

Fig. VI is a perspective View of the stop device carried by said tappet lever in Fig. I and adjustable to variably limit the opening movement of said automatically operative valve.

Fig. VII is a perspective view of the detachable counterbalance weight which is adjustably connected with said tappet lever shown in Fig. I.

The gas range which is indicated in Fig. I is provided with the usual top frame 1 adapted to uphold removable p ates 2 arranged to support heat using devices, such as the frying pan 3, in operative relation with the gas flame 4 extending above the burner 5 which extends beneath said plates 2 in registry with the opening 6 therein. Said burner 5 is provided with the usual gas supply tube 7 having the bell inlet 8 with a perforated cap 9 to admit air around the gas nozzle 10. Said nozzle is at the inner end of the valve body 11 which is connected with the gas supply pipe 12. Said valve body holds the ordinary plug stop cook 14 which is arranged to be manually operated by the handle 15, and also the auxiliary valve 17 which is provided with'the sectoral lever plate 18, whereby it may be operated as hereinafter described. As shown in Fig. II; said valve plug i has a port extending therethrough which s adapted to register with the passage 21 in said valve body 11, or not, in accordance with the position to which said handle 15 is turned. Said valve 17 likewise has the gas port 23 which is adapted to register with said gas passage 21, or not, in accordance with the position to which said valve 17 is turned. I prefer to make said port 23 of the circumferentially tapered form indicated in Fig. III, so that the volume of gas flowing therethrough may he adjustably varied to a greater degree than if said port were circular. Such a tapered port may be conveniently formed by drilling a circular hole through said valve plug 17 and filing one edge thereof.

Said valve 17 may be conveniently operated by the tappet lever 25 which is fulcrumed upon the screw 26 carried by the clamp ring 27. As best shown in Fig. V, said clamp ring 27 is split at 28 so that it may be clamped upon said burner tube 7, by said fulcrum screw 26 which engages the nut 29. I also prefer to provide said clamp ring 27 with a set screw 30 having a pointed inner end to engage a corresponding depression in said tube 7 so that when said clamp ring 27 is secured in the position shown in Fig. I it may not be accidentally displaced. Said tappet lever 25 is conveniently provided at its outer end with thedetachable screw 32, best shown in Fig. IV, which is adapted to form a pivotal connection with said sectoral plate 18, by being selectively engaged with any one of the slots 34 in said plate; so that, when said lever 25 is tilted downwardly at its inner end, said plate 18 is turned upwardly and said valve 17 correspondingly turned to open said gas passage'21. The extent of such tilting movement of said lever 25 may be precisely limited by the stop device shown in Fig. VI. includingthe fitting 35 which is adjustably secured by the set screw 36 upon said lever 25 and carries the stop screw 37 which abuts against the edge of said clamp ring 27. The weight 39, best shown in Fig. VII, is provided with the set screw 40 so that it may be adjust-ably connected with said lever25, as shown in Fig. I, so asto' normally shift said lever to its lowermost position to automatically turn said valve 17 and close said passage 21; but the inner end of said lever 25 is adapted to be depressed by any heat using device set thereo ver, so as to thus automatically open said valve 17 whenever any such device is placed in position to use the heat generated by said flame 4.

However, as some forms of pots and pans and otherfheatusing devices are hollow at the rbettom,f find it convenient to provide the inner end of said tappet lever 25 with means to adjustably vary its effective height with respect to the top plates 2 of said range. For instance, as shown in Fig. I, said lever may be provided with the adjustable screw 41 which may be rotated to raise it to encounter a cooking utensil with a hollow bottom or be lowered to encounter a utensil having a flat bottom. such as said trying pan 3.

Moreover, my invention is conveniently adapted to be operated by the door 43 of the oven e5, by providing said sectoral plate 18 with the extension 46; so that a valve 17 such as above described, when located in front of said door, presents said extension 46 in position to be encountered by said door when it is lowered to its open horiz'om tal position and thus connects the valve 17 of. the burner in operative relation with the oven, without the employment of said tappet lever 25.

Although I have described my invention as applied to an ordinary gas burner ;-it is to be understood that it is equally applicable to any heater, regardless of the nature of the heating medium, to automatically control the use of the latter as above described.

Therefore, I do not desire to limit myself to the precise details of construction and arrangement herein set forth, as it is obvious that various modifications may be made therein, without departing from the essential features of my invention as defined in the appended claims.

' I claim:

1. The combination with a gas burning heater having a support for removable articles to be heated; of a burner extending beneath said support; a rotary valve constructed and arranged to control the fiow of gas to said burner, in accordance with its turning movement; and means, including a tappet lever operatively related to said valve and normally projecting from said support, but capable of being displaced to open said valve, by an article placed on said support in position to be heated; and an oven, having a door arranged to close said valve when said door is opened.

2. The combination with a gas burning heater; of a valve constructed and arranged to control the supply of gas to said heater, including a rotary conical plug, a sectoral lever plate on said plug, a series of radial slots in said lever plate, and a tappet lever having an arm provided with an adjustable member arranged to be selectively engaged withanyone of said slots; said lever having another arm presented in position to be dis placed by an article to be heated; whereb v said valve is opened when an article to be heated is placed in position to be heated, and the degree of opening movement is predetermined by the selective engagement of said tappet lever with said sectoral lever.

3. The combination with a gas burner; of avalve constructed and arranged to control the supply of gas to said burner, including a rotary conical plug having a gas port which is tapered circumferentially, in cooperative relation with a port leading to said burner; whereby a gradual increment and decrement in the effective area of said port is consequent upon the turning movement of said valve plug; a lever plate rig idly connected with said plug; an oven having a door arranged to directly engage and turn said plate and plug; and a tappet lever, 15

heated is placed in cooperative relation with 20 said burner.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania this fifth day of May, 1920.

EDWARD WILLEY MARVEL.

Witnesses:

ARTHUR E. PAIGE, CAROLYN E. REUTER.

Images