US2043971A - Gas cock - Google Patents

Description

June 9, 1936. J; M v 2,043,971

GAS COCK Filed Nov. 4, 1953 !NVENTOR John T. Marviru ATTORNEY Patented June 9 1936 UNITED STATES GAS cocx John T. Marvin, Cleveland, Ohio, assignor to The Cleveland Heater Company, Cleveland, Ohio, a corporation of Ohio Application November 4, 1933, Serial No. 696,691

' 1 Claim. (Cl. 251 -163) This invention relates to controls for gas-fired tion at the discretion of the user, and in order to obtain a low heaifor simmering position for the flame it is necessary to visually observe'the fiame while adjusting the cock.

My invention contemplates the provision of a gas cock with a fixed simmering position which is pre-set to provide a predetermined minimum flame, which flame is selected in accordance with the type of gas being used.

Another object of the invention is to provide such a cock which has a means to indicate to the user when the cock has passed from its full open to simmering position. 1

A further object is to provide a cock having a single port for the passage of gas to the burner in either the full open position or the simmering position.

Still another object is to provide agas cock which structurally requires little departure from the conventional cock, and which is therefore easy to assemble and cheap to manufacture.

An additional object is to provide means for adjusting and setting the simmer position in accordance with the various types of gas used with the range.

Other objects and advantages of the invention will be apparent from the following description and accompanying drawing wherein:

Fig. l is an elevation of a gas cook embodying one form of the invention;

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1 showing the cock in full open position;

Fig. 3 is a view similar to Fig. 2 showing the cock in the simmering position, and

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 1. I

Referring to the drawing for a detailed description of the invention, Ill denotes a valve body provided with a threaded inlet fitting II and a threaded outlet fitting l 2. The valve body is provided internally thereof with a tapered bore l3, and a smaller bore 14 extends from the bore l3, through the outlet fitting l2. The lower end of the outlet fitting terminates in. a coneshaped spud l5. An internally threaded cap member l5 cooperates with the fitting l2 and has a port I6 provided in its lower end. This port cooperates with the spud II to provide a pre-set valve member for regulating the fiow of gas to the burner as is well known in the art. Initially the cap member is adjustedon the fitting I2 and set to give the maximum efliciency to the burner when the maingas valve is fully open.

Themovable portion of my improved valve comprises a tapered barrelmember I] which fits snugly inside the bore 13 and has an axial passageway l8 provided therein andextending from the surface of the member I! to the passageway I8 is a radial passage 19. A passage 20 extends axially of the inlet fitting so as to convey gas to the passages 19, from where it flows through the passages I8, and I4 and the orifice I4 to the mixing tube of the burner (not shown). A reduced cylindrical portion 2| is provided at the larger end of the barrel H, from which portion extends a stem 22 carrying a handle mem ber 23. A cap 24 is disposed around the stem 22 and has an adjustable screw-threaded engagement with the valve body ID. A compression spring 25 also surrounds the stem between the cap 24 and the cylindrical portion 2| and thus serves when compressed by the cap 24 to prevent movementof the barrel with respect to the valve body.

The upper end of the valve body adjacent the cylindrical portion 2|, has a cut-away portion 26 through which projects a pin 21 extending radially'from thecylinder 2|. At one end of the cut-away portion 26 is a projection 28 carrying an adjustable screw 29 which serves to limit the movement oi the pin 21 and consequently the valve barrel I! in one direction, its movement in the other direction being limited by the end wall 30 of the cut-away portion 26. A slight projection or lug 3| is formed in the cut-away portion 26 so that when the barrel I1 is being rotated the pin 21 will strike this lug. The lug is not large enough to prevent movement of the valve barrel H but merely serves as a means to indicate to the user the position of the valve barrel.

In the operation of my device and with particular reference to Figs. 2 and 3, let it be assumed that the valve handle has been turned counter clockwlse until the pin 21 contacts the stop 30 at which time thepassage I9 is completely out of communication with the passage 20 and no gas passes through the valve. The handle 23 is thenrotated counter-clockwise until the pin 21 contacts the lug 3! at which time, as the passages 20 and I9 are in complete registry, the gas PATENT I OFFICE at the burneris iulLv on. This position is shown in Fig. 2. Should it be desired to operate the burner with a lower or simmering flame, it is only necessary to rotate the handle 23 further clockwise until the pin 21 has passed the lug 3| and contacts the stop I! which I find should be made adjustable to take care of the various kinds of gas in use. In this position which is shown in Pig. 8 the passage Ills in restricted communication with the passage 20 so that only a limited and predetermined amount 01' gas flows to the burner. It should be noted that in the movement of the valve from the full open to the simmering position, the-passage I9 is in constant communication with the passage 20 so that the burner is constantly ignited.

A particular advantage of the invention as described lies in the fact that when the burner is intended to be ignited hy the ilash tube method it is necessary that the valve be first turned to the full open position, a condition desirable for the successful operation of such devices.

It will be apparent from the foregoing description that I have invented a gas cock which may be cheaply made and assembled, which provides a positive pre-set simmering position without any necessity for the user observing the flame, which positively indicates the full on position of the burner, and which is particularly adaptable for use with automatic ignition devices.

While I have shown and described a single embodiment oi the invention, it will be apparent that other forms might be adopted, all coming within the scope of the appended claim.

I claim:

A gas cock including relatively fixed and movable members, said membershaving passageways arranged for registration and non-registration with one another, stops for limiting the movement of the movable member, said members when in one limited position having their passageways in non-registering position and when in the opposite limited position having their passageways in fractional registering position, said passageways being in substantial complete registration when the movable member is positioned intermediate the positions limited by the stops, a surmountable obstruction on said fixed member intermediate the stops for yieldingly resisting movement of the movable member when said passageways are in substantial complete register

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