US1133767A - Gas-stove, (oven-burner.) - Google Patents

Description

A. W. WALKER. GAS STOVE (OVEN BURNER). I APPLICATION FILED JAN. 26, 1914.

Patented Mar. 30, 1915 I ARTHUR W 1 1444 KL)? MW ML W ARTHUR W. WALKER, OF MALDEN, MASSACHUSETTS.

GAS -STOVE, (OVEN-BURNER.)

Specification of Letters Patent.

Patented Mar. 30, 1915.

Application filed January 26, 1914. Serial No. 814,313.

To all whom it may concern Be it known that I, ARTHUR W. WALKER, a citizen of the United States, residing at Malden, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Gas- Stoves, (Oven-Burner,) of which the following is a specification.

This invention relates to improvements in gas stoves. More particularly it relates to safety devices for use in connection with the valve cocks and ovens of gas stoves. In the United States Patent No. 821,633 of George W Graves is shown a stove having a device which cooperates with the gas valves and the oven door in such manner that a cock can be opened to permit the flow of gas to a burner in the oven only after the oven door has been opened.

The present invention relates to improvements upon the construction and method of operation of apparatus by which said object is attained.

It is an object of the invention to provide operating mechanism which is so far concealed from view as to make a simple harmonious design of stove possible and so far out of the way as not to introduce any complication in the use of the stove, but to leave a free and clear space in front of the stove and at each side of the oven door when the oven door is open; and also to adapt it to an oven door swinging outward and downward around horizontal hinges.

It is'also an object of the invention to provide for placing the gas cocks on the right hand side of the stove, this being the position where they are most convenient to the user'of the stove when standing in front of it, and also to provide for the use, in that position, of the present commercial standard type of gas cocks in which the handle when the cock is open projects perpendicularly from the stove, and swings to the right when it is closed.

It is the further object of the invention to provide'the other advantages and improvements that are incidental to the structure herein described, and it is the intent of the patent to cover by the appended claim whatever features of patentable novelty exist in the invention disclosed.

in the accompanying drawings: Figure 1 is a perspective View of a gas stove embodying the invention; Fig. 2 1s a side elevation of part of the stove, showing the invention on a larger scale; Fig. 3 is a front elevation of the same; Fig. fl: is a side elevation, 111 section on the line H of Fig. 3; Fig. 5 1s a perspective view of a detail; and Fig. 6 is a front elevation of certain details on a still larger scale.

In the drawing, 10 represents a stove with a system of gas supply pipes 11 from which gas cocks having handles 12 lead to the burners within.

13 is the oven door, hinged at the bottom, where one pivot pin (not shown) extends into a socket within the boss 14 at the left, and another pivot pin 15 extends into a socket 16 at the right. The socket 16 is formed in part by a plate, seen best in Fig. 1. When the screw 17 which holds its top part is removed this plate may be lifted out of the little socket in which its lower end 18 is engaged; and the door 13 may then be removed toward the right (Fig. 1).

The pivot is composite, consisting of the par s 15 and 19. The part 15 is integral with the door 13 and is a full cylinder for a certain distance outward from the main portion of the door, and is only a fraction of a cylinder for the balance of the distance. As portrayed in Fig. i this fraction is one half. The remainder of the pivot pin at this portion consists of a semi-cylinder 19 formed integrally with a crank 20 having a crank pin 21 as seen in Fig. 5.

The parts 15 and 19 together make a full cylindrical composite body, which is held together by the socket plate 16 when the stove parts are assembled. The turning of the door 13 on its hinges in either direction turns the pin 15, including that end portion which is only a semi-cylinder; and this turns the portion 19 about the same axis; so that as the door opens or closes, the part 19 with its attached crank 20 rotates about the axis of the door hinge. This device of splitting the pivot pin provides the necessary mechanical engagement of parts for the oven door to operate the safety cock guard as will now be described; and attention is called to the fact that this connection is practically invisible, does not interfere with the freedom of the space about the door when the oven door is open, and that it uses parts which can be cast and assembled without machining, as is desirable in connection with stoves. These parts are always quickly separable, being held together only by be ing confined together in the same socket, yet are stout and practically frictionless when assembled.

The guard which. it is preferred to use for the cock handles is in the nature of a hood, completely surrounding the handle except on its front side and at its stem end. It is desired to provide means for positively controlling the position of the cock-guards, in harmony with the position of the oven door. It is also desirable to provide means to avoid outside trappings such as the spring shown in the patent mentioned, which is liable to get out of order, and which requires a separate support on the outside of the stove. The crank provides such means. It must however be observed that the room available for throw of the crank 20 is affected by the conditions of the problem which re quire it, in the best form of the invention, to be concealed behind the front corner of the stove. The best embodiment of the invention therefore provides a sliding bar 22 mounted on the side of the stove and extending horizontally past the gas cocks, its forward end having a short vertical slot 23 in which a pin 24 may travel. 'A bell crank lever 25 is provided, pivoted at 26, one end of which carries said pin 2% at a position above the pivot 26 and the other end of which has an open ended slot extending obliquely downward and toward the front of the stove from said pivot 26. The pin 21 of the crank 20 engages in this slot. The crank is set at such an angle with respect to the semi-cylindrical portion 19 and the oven door, that when the door is closed the crank extends obliquely downward to the rear as illustrated in Fig. 2 at an angle of about 45. When the oven door is opened, the door swings down to the left (in Fig. 2) through a quadrant, and the crank arm swings up through a quadrant. This carries the crank to an oblique position pointing upward and backward. In so moving it travels past the center 26 on which the bell crank is pivoted, turning the bell crank, thus throwing the pin 24: rearward. The engagement of this pin in the slot 23 of the bar 22 drives that bar to the rear; and brings it back when the oven door is closed again.

The construction and mounting of the bar 22 and its attached parts are seen in Fig. 6 where the cock hoods 27 are represented as being held thereon by bolts 28 and by lugs 29 on the bar which keep them at the proper angle. The bar itself is held in smooth sliding contactwith the side of the stove by guiding ribs 30 on the stove and 31 on the bar, which inter-mesh with each other in such a manner as to hold the bar against movement'either up or down, and by a bolt 32 and a spring 33 which press the bar against the side of the stove. The upper part of the may be placed on one of the hinges. Ordibar is formed inward toward the stove over the upper guide 30, and the lower edge of the bar is formed inward as at 37, resting against the side of the. stove. Thus are provided smooth bearing surfaces by which the mechanism is inclosed and concealed, dust kept therefrom, and a smooth'and simple exterior presented to View. The pressure of the spring 33 keeps the bar flat against the side of the stove on these hearings, but the slot 3% permits the bar to travel forward and back past the bolt and spring 33. Because of the connection through the split pivot the spring 33 also constitutes a sort of tension means for the oven door. 'Unlike the spring shown in the Letters Patent mentioned, the whole effect of which is to tend to open the oven door or to interpose a stiff obstacle at the last fraction of the closing movement, so that special .attention'has to 35 r be given each time to see thatthe dooris actually closed, the spring 33 here described produces its effect on the door throughout the entire swing of the door, and interposes no more obstacle to the closing of the door in the last inch than itdoes at any other time. Ittends moreover to promote easy and uniform operation, particularly when used in cooperation with a spring 35 which narily this spring 35 may be placed on the hinge 14 at the left of the door; but it may be put on either hinge; and for'the sake of simplicity it is illustrated in the drawing Fig. 3 as being. on the hinge at the right of the oven door. This is a counter-balancing spring whose upper end is prevented from rotary movement by its engagement against the stationary wall of the socket, but'whose other end is inserted radially in the pivot as at 36 and consequently rotates therewith, winding the spring as the oven door 13. swings open. In order for this springto be strong enough to alford considerable support to the oven door when the door is swung down to its horizontal and projecting position, this being its position when open, such aspring at its axis must have considerable strength. It is desirable that the spring be one having considerable yielding power, as distinguished from being a-stiff spring,

so that it can be wound and unwound through this quarter turn repeatedly through a long term of years without endangering its life. These requirements allow whose tension is notentirely released when the door is closed. The action and counteraction of the two springs 33 and 35 upon each other may therefore, by proper designing of the springs, be such that the spring 125 35 is strong enough to afford very considerable assistance when'a person'lifts the oven door to close it; and is under sufficient torsion to continue its assistance to the very limit of the doors movement closing, thus 1 the use of a spring. V

tending to hold the door closed; and yet has its effect somewhat modified by the friction or drag imposed by the spring 33. The latter, being constant, becomes proportionally larger as the tension in the spring 35 grows less. The result is that the oven door acquires a peculiarly easy, semi-automatic closing action, and tends automatically to stay closed, and yet has a minimum tendency to bang in closing.

When the oven door is closed, the cock guarding hoods 27 occupy the positions illustrated in the drawing and seen in Figs. 2

and 3, so that a person cannot light the burner without first opening the oven door in orderto unguard the cock handles and thus to turn the cock. Consequently'if it happen that a leakage of gas has occurred, no explosion will result upon ignition, because the oven is vented by the open door.

I claim as my invention The combination, in a gas stove, of a closed chamber, a burner therefor, a cock controlling it; and a guard for the cock having a part slidable on the wall of the stove; with a spring pressing said part against the stove wall thereby providing a frictional drag of uniform quality; a hinged door for said chamber; connections, whereby movement of the door slides the guard; and a spring partially counter-b alancing the weight of said door, arranged continuously in engagement' therewith with its tension increasing as the door is opened.

Signed by me at Boston, Mass, this 19th day of January, 1914.

ARTHUR W. WVALKER.

Witnesses:

EVERETT E. KENT, JOSEPH T. BRENNAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C.

Images