US1437369A - Gas cock - Google Patents

Description

AIR. TALLMAN.

' GA'S COCK.

APPLICATION FILED FEB. 2, 1921.

Patented Nov. 28, 1922.

Patented Nov. 28, 1922.

UNITED STATES PATENT OFFICE.

ALBERT ROMAINE TALLMAN, 0E NASHVILLE, TENNESSEE, .ASSIGNOR OF ONE-FOURTH TO HERBERT HARSH, ONE-FOURTH TO ROBERT L. LEWIS, AND ONE-FOURTH TO NANCY T. LEWIS, ALL OF NASHVILLE, TENNESSEE.

G AS COCK.

of this application is a gas cook of that general type wherein a plunger and a latch are mounted for reciprocation in a rotatable valve, the plunger constituting means for actuating the latch, and the latch coacting with the casing of the valve, to limit the rotation of the valve. 4

One object of the invention is to provide novel means for interengaging the plunger with the latch in such a vwagy that there will be no lost motion between the plunger and the latch, the plunger constituting means for advancing the latch when the plunger is thrust in one direction, and constituting means for retracting the latch, when the plunger is moved in an opposite direction, adequate bearing surfaces be.- tween the plunger and the latch being provided, to the end that the device may be adapted well to withstand wear.

A further object of the invention is to provide novel means for controlling the spring which operates the plunger.

It is within the province of the disclosure to improve generally and-to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in' the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made withoutdeparting from the spirit of the invention. Y

In the accompanying drawingsz- Figure 1 shows in side elevation, a device constructed in accordance with the invention; Figure 2 is an elevation wherein the Application filed February 2, 1921. Serial N 0. 441,832.

structure is viewed at right angles to the showing of .Figure 1; Figure 3 is a fragmental section wherein parts appear in elevation; Figure 4 is a section taken through the valve and attendant parts, the cutting plane in Figure 4 being at right angles to the cutting plane in Figure 3; Figure 5 is a transverse section taken through the valve and the valve casing; and Figure 6 is a composite perspective view delineating a portion of the plunger, and the latch.

The numeral 1 marks a casing having an inlet 2 and an outlet 3. A valve 4 isjournaled in the casing 1 and includes a tip 6 whereon a washer 7 is mounted, the washer abutting against one end of the casing 1. A screw 8 is threaded into the tip 6 and carries a washer 9. A compression spring 10 surrounds the tip 6 and abuts against the washers 9 and 7. The valve 4 is of conical form, and the spring 10 constitutes means for holding the .valve seated. The

valve 4 comprises 'a stem 11 having a laterplied with a pin or projection 21, located in the notch 18 and adapted to coact with the sto s 19 and 20.

n actuating member in the form of a plunger 22 is mounted to reciprocate in the bore 14 of the valve 4. The plunger 22 has a button 23, at one end, fitting slidably in the bore, 14, the plunger being provided at its inner end with a foot 24, likewise slidable in the bore 14. The plunger 22 slides in a washer 25 located in the bore 14. -A compression spring 26 surrounds a portion of the plunger 22 and abuts against the washer 25' and the button 23. A detent 27 in the form of a pin, is mounted removably in the stem 11 of the valve 4 and extends transversely of the stem. The pin 27 passes across the bore 14 and supports the washer 25. The plunger 22 has a flat side 28. The pin 27 exercises a three-fold office. First, it receives the thrust of the spring 26, since the pin supports the washer 25 whereon the spring bears. Second, the pin 27 engages the foot 24, thereby limiting the outward movement of the plunger 22 under the action of the spring 26. Third, the pin 27 engages the flat side 28 of the plunger 22 and pre vents the plunger from rotating.

Interengaging elements are provided, whereby motion may be transmitted from the plunger 22 to the latch 30.. These interengaging elements embody inclined fingers 29 projecting from the foot 24, together with notches 31 formed in a latch 30, the latch 30 being mounted for right line reciprocation in the valve 4, transversely of the valve. The latch 30 may project into the notch 18 of the valve casing 1. The notches 31 of the latch 30 define a thinned neck 32 received between the fingers 29 of the plunger. Each notch 31 defines shoulders 33. The notches 31 are cut at an acute angle in the latch 30 to correspond with the slant of the fingers 29 with respect to the axis of the plunger 22. The fingers 29 substantially fill the notches 31.

that there will be no lost motion between the plunger and the latch, where the flanges 29 are received in the notches 31. Further, the shoulders 33 afi'ord adequate bearing areas for the fingers 29, and tend tov lessen wear. When the plunger 22 is thrust inwardly, the latch 30 will be advanced, and when the plunger moves outwardly, the latch will be retracted,-a positive movement being imparted from the plunger to the latch and lost moby those skilled in the art. It may be stated,

however, that when the latch 30 engages with the shoulder 20, and when the projection 21 engages with the shoulder 19, as,

shown in Flgure 5, the passage 5 in the valve 4 is disposed transversely of the inlet 2 and the outlet 3, it being impossible for gas to pass through thecock, the valve being held against rotation. The operator may thrust the plunger 22 inwardly, whereupon the fingers 29' will retract the latch 30. Then,- the valve 4: may be turned clockwise (Figure 5) until the projection 21 engages the shoulder Each finger 29 bears against both of the shoulders 33, formed by one notch 31. The general construction is such 20, under which circumstances, the passage 5 in the valve will establish communication between the inlet 2 and the outlet 3. The latch 30, at this time, has been pushed to the right (Figure 5) and is held retracted by contact with the inner surface of the casing 1, the spring 26 being held under compression. As soon as the-valve at has been rotated in a counter clockwise direction, into the position of Figure 5 the latch 30 is released, and moves outwardly into the position of Figure 5 due to the expansion of the spring 26 and to the action of the fingers 29 of the plunger on the shoulder 33 of the latch 30. 7

Having thus described the invention, what is claimed is 1. In a device of the class described, a casing having stops spaced circumferentially of the casing; a valve journaled in the casing; a projection carried by the valve and a latch slidable in the valve, the projection and the latch cooperating with the stops to hold the valve against rotation, the latch having oppositely disposed notches each defining shoulders; and a plunger slidable in the valve and including fingers received in the notches and filling the same, whereby each finger will bear without lost motion upon; both of the shoulders defined by one notch, thereby to advance the latch when the plunger is advanced, and to retract the latch slidable in the valve and cooperating with the casing to hold the valve against rotation; a plunger comprising a button and a foot slidable in the valve, the foot and the latch having interengaging elements whereby motion is transmitted from the plunger to the latch; a spring surrounding the plunger and abutting against the button to retract the plunger; and. a detent in the valve and receiving the'thrust of the spring, when the plunger is advanced, the detent cooperating with the foot tolimit the retracting movement of the plunger under the impulse of the spring.

3. In a device of the class described, a casing; a valve journaled in the casing; a latch slidable in the valve and cooperating with the casing to hold the vah'e against rotation; a plunger having a fiat side, the plunger comprising a button and a foot slidable in the valve, the foot and the latch having interengaging elements whereby motion is transmitted from the plunger to the latch; a washer in the valve, the plunger being slidable in the washer; a spring surrounding the plunger and abutting against the washerand the button, the spring constituting means for retracting the plunger; and a detent mounted in the valve, the detent coacting with the washer to receive the thrust of the spring, when the plunger is as my own, I have hereto afiixed my signaadvanced, and coacting with the foot, to turnin the presence of two witnesses. limit the retracting movement of the plunger under the action of the spring, the ALBERT ROMAINE TALLMAN' 5 detent engaging the flat side of the plunger \Vitnesses:

to hold the plunger against rotation. SONOMA MAsLIN,'

In testimony that I claim the foregoing JOHN E. SooBEY.

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