US1843475A - Gas valve - Google Patents

Description

Feb. 2, 1932. M. APFELBAUIMQ GAS VALVE Filed July 14, 1930 a for .a child to open. Another objection to l latented 2, E9532 y Anrnma'om', W

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This invention relates to gas valves, particularly to that class thereof used in con- 5 nection with gas stoves and other gas appliances. 7

The construction of. gas valves in common use in householdsis such that when once shut ofi, they can be easily turned on by a child and become dangerous, there being no means of locking the valves in a shut-ofi7 position, particularly in a manner to make it difiicult the modern gas valve construction for house stoves isfound in the lower part of the valve, with its spring and nuts extending into the space above the drip pan catching the cleaning cloth or injuring the,hand of one in the act of cleaning about these parts of the stove.

Therefore the objects of my invention include particularly a form of construction of gas valve which will lock in a closed position and at the same time require a strong lift onthe handle of the'valve t6 release it,

to be turned to open position.

lit is natural for a child to pull down,

therefore ll desire to have the locked valve released by an up-pull, to be followed by the turn. ll further desire to hold the valve plug seated in place, in its tapered cross hole, by other means than an outside compression spring and nuts below the valve body and thus I dispense with such appendages in the space above the drip pan. In devising a valve construction to fulfill this last named ohject, I desire to keep the plug seated at all times, even when lifting the handle to open the valve,'and thus avoid any leakage which would otherwise occur, when the valve is released from its locked shut-off position, when the handle is raised, if the handle were oined to the plug.

Further objects in mind, in devising an improved gas valve construction, include simplicity of construction, such as will, .while fulfilling the above mentioned objects, lend. itself to ordinary methods of manufacture and provide an inexpensive valve to market,

withthe advantages alcove set fdrth.

One embodiment of my invention .is illustramd in the drawings, is hereinafter derace. Serial at.

scribed, its operation is explained and what I claim is set forth,

In the drawings,

Figure l is a sectional elevation of a gas valve embodying my invention.

Figure 2 is a section taken on the line 2-2 of Figure l...

Figure 3 is a sectional elevation of the handle stem rod, cap, spring and pin assembled.

Figure 4 is a perspective in'ew ofthe valve body per se. 3

}Figure 5 is a perspective view of the valve pug,

In the figures, "the body is shown to have the usual threaded ends 11 and 12. To

the end 12 is screwed the nozzle 13. Through the ends 11 and 12-is the hole M, shown in Figure 1 to have in line with it, the hole 15, of the valve plug 16 for the open position of the valve. The usual form of handle 1'? is used on a stem rod 18, which passes through a cap 19.- This cap 19 is in threaded engagement at 20, with the body 10', the edge 211 of the cap 19, being seated when the cap 19 is screwed on tight.

Passing through the stem rod 18, near its .lower end, is a cross pin 22, in en agement with vertical slots 23, in the wal of the plug 16. A strong compression spring surrounds the stem rod 18, and has its upper end seated at'25' within the upper end of the -cap 19. Between the spring 24-and the cross pin 22, is the washer 26. This washer 26 slidingly fits the. cylindrical pocket 27 in the plug 16. The rod 18 bears down upon the guiding surfaces 28, of the body it). Inasmuch as both ends of the cross pin 22 tune tion with a guiding surface, for a balancing efiect, theguiding'surfaces'28 are in duplicate. Each guiding surface 28'has a horizon- "tal section 29, a raised tooth section 30, and a depressed or notched section 31, against which stands the wall 32, of the stop post 33, fixing the shut-eff position limit oi the valve. The opposite wall 34,-,ofeach stop post 33, forins the full-open stop limit to the cross pin-22. The vertical slots 23 in the plug 16 are 'made deep enough to permit the cross pin 22 to engage the notched section ill to its full depth Wl 18l'l the handle'll' is turned, the plug 16 re till wil

maining seated in its tapered socket. In order to keep the plug 16 seated, I provide a light spring 35, engaging the pocket 36 in the end of the stem rod 18, and bearing down on the floor 37 of the cylindrical hole 38 of the plug 16 in which the end of the stem rod 18 slidingly fits. By having the spring engage a pocket in the end of the stem rod 18, instead of bear against a blank end of the rod 18, for a given length of spring 35 required to function properly, the end of the stem rod 18 can further penetrate the pocket 36 for a longer bearing, where it is desired to keep the height of the handle 17 as low in design as possible. The fact that the spring 35'is made lighter than the spring 24, the action of the spring 24, in keeping the cross pin 22 in pressed engagement with the guiding surfaces 28 and the notched section 31 thereof, is not interfered with, when operating the valve.

In operation, with the valve parts being in the position shown in Figures 1 and 2, that is, with the valve-full open, upon turning the.

handle 17 counter-clockwise to shut off partially or full, the cross pin 22 will bear first on any part of the horizontal section 29 of the guiding surface 28 and will there rest. holding the valve where adjusted. If it is desired now to shut the valve off entirely, the handle 17 is further turned and the resistance of overcoming each tooth 30, will be felt as the cross pin 22 passes over it and snaps into the notches 31, due to the pressure of the strong spring 24:. During the turning to fully shut-off the valve, the light spring 35 has kept the plug 16 seated in the body 10.

Now, with the valve shut, to open the same, it is necessary to first lift strongly on the handle 17, against the action of the strong spring 24, to lift the cross pin 22 out of the notched sections 31 and in position to turn over the tops of the teeth 30, then the lifting action is released, seating the cross pin 22 back upon the horizontal sections 29 and free .to be turned to full-open position again.

When the handle has been pulled up as high as necessary to have the pin 22 clear the tops of the'teeth 30, the pin 22 butts up against the ledge 39 within the cap 19, so that the pin 22 does not become dislodged from the slots 23 in the plug 16, or the stop posts 33. Also while the handle 17 is in its upmost posi tion, the spring 35, while exerting less downward pressure upon the plug 16,than when the handle is down, the spring 35 is designed to still exert sufficient downward pressure on the-plug 16 to keep it seated.

I It will be observedthat the valve construction including the spring 35, entirely eliminates the necessity of having the-plug 16 extend beyond the body for an outside spring and nuts, and ermits of cutting 0d the valve body close tot e nipple ends 11 and 12. So, when assembled in a gas stove, the valve does means, at alltimes, in operative, open an not appreciably extend into the space between it and the drip pan and thus will not injure the hand or catch the cleaning rag of the one cleaning. 7

Inasmuch as changes in the details of construction of the one embodiment of'my invention herein shown and described can be made without departing from the spirit and scope of my invention, I desire to include all forms thereof which come within the purview of the following claims.

I claim,

1. A valve comprising a valve body, a fluid passage through said valve body, means for opening and closing said passage, a cap at tached to said body, covering said means, an

element for operatingsaid means, a spring within said cap for keeping said element in operative engagement with said means, a cam surface on said body, having a shut-off notch in said surface adapted to be engaged by said element, and aweaker spring below said first mentioned spring and positioned between said means and said element for keeping said shut engagement with said passage.

2. A. valve comprising a valve body, a truncated conical plug fitting and adapted to be turned in said body, there being a passage through said body, extending across .sai plug, adapted to be opened and closed by the turning of said plug, said plug having a vertical slot in its upper part, a cap on said body, covering said plug, through said cap, co-axial with said plug, a handle for turning said stem rod, a cross pin in said stem rod, slidingly engaging the slot in said plug, a guiding cam surface on said body, compression spring surrounding said stem rod, seated within said cap and bearing down to cause said cross pin to hold against said cam surface, there being a notch in said cam surface into which said pin is adapted to enter when said valveis shut-off and a compression spring of less strength than the first mentioned spring, positioned below the same and below said stem rod to bear down on said plug and up against said stem rod, adapted at all times to keep said plug seated in its cavity in said valve body. a

3. A valve comprising a valve body, a truncated conical plug fitting and adapted to be turned in said body, there being a passage through said body extending across said plug, adapted to be opened and closed by the turning of said plug, a cam on said body about said plug, said cam including an operative surface in a plane perpendicular to the axis of said plug, a tooth projecting above said surface and anotch next to said tooth, a stop limit next to' said notch, a stop limit next to said surface, a cap screwed to said body en-. closing said camand said plug, a stem rod in alignment with the axisof said plug, said plug having a pocket .in its large end surice \ rounded by aplu wall, there being a'vertical notch throng this wall, a cross pin on said stem rod engaging and extending beyond said hole to be operative with said cam and said notch, a coiled sprin surroundin said stem rod seated within said cap and a apted to cause a bearing down on said cross pm, a

lighter spring between said stem rod and said plug adapted to hold said plug seated regardless of the reciprocative movement of: said stem rod due to its movement on said cam.

4. In a gas valve having a body, a-tapered plug rotatively engagin said body, a fluid passage through said b0- y across said plug,

' means keyed to said plug for turning the same, a strong spring for keeping said means in keyed engagement with said plug and a lighter spring between said means and said plug for keeping said plug seated. MYER APFELBAUM.

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