US1330075A - Safety gas-valve - Google Patents

Description

M. J HORKAVE.

SAFETY GAS VALVE.

APPLICATION FILED JUNE 7.,19I9.

1 30,075. Patented Feb. 10, 1920.

I N V EN TOR. -///lC/6 a! fig/.7114 1/6,

iz/s ATTORNEY.

MICHAEL J. IIQRKAVE,

OFGARY,,INDIANA, ASSIGNOR OF ONE-HALF TO STEPHEN BLANERQOF GARY, INDIANA.

SAFETY GAS-VALVE.

Specification of teeters Patent. Pat ted Feb. 10, 1920.

Application filed. June 7, 1919. Serial No. 302,581.

. To all whom it may concern:

Be it known that 1, MICHAEL J Hon- KAVE, a citizen of the United States, and a resident of Gary, Lake county, and State of Indiana, have invented certain new and useful Improvements in Safety Gas-Valves, of which the following is declared to be a fulhclear, and exact description.

This invention relates to safety gas valves and its principal object is to provide means whereby the gas Valve stem cannot be manipulated when the knob or handle of the valve is in normal position. Valves of gas stovesv are controlled by knobs or handles, and occasionally a gas valve is accidentally opened without the gas being ignited, thus endangering the lives of those present. Small children are attracted by the valves and frequently play with the knobs or handles, and occasionally turn on the gas, with the result that unless discovered in time, asphyxiation ofthe child and others present may occur. WVith the present invention the danger of turning the gas on or off. without first setting the knob; or handle in operative position, is eliminated. The invention consists in a'knob or handle for gas valves, having an inoperative position, held in such position by spring pressure, but capable of being moved to operative position. The/invention further consists in the several novel'features hereinafter fully described and claimed. i

The invention is clearly illustrated in the accompanying drawing, in which: I

Figure 1 is a cross section through a gas pipe of a kitchen gas stove showing the gas valve inside elevation, and showing in central, vertical section, a simple embodiment of the present invention applied thereto;

Fig. 2 is a side elevation of a fragment of the gas valve, with the device shown in central, vertical section, but in operative position;

Fig. 3 is a detail horizontal section of the knob, taken on-the line 33 .of Fig. 2;

Fig. 4: is a view, partly in end elevation and partly in vertical cross section, the line of section being indicated at .44: in Fig. 1;

Fig. 5 is a detail cross section of the knob taken on the line 55 of Fig. 1; and

Fig. 6 is a perspective view of a certain clutch member or star wheel used in the device. 7

means between the knob and stem clutching it to the valve stem, The knob star wheel. .is a smaller cylindrical recess 12 in Which Referring to said drawings, the reference character A designates a gas pipe of a kitchen gas stove, B designates one of the gas valves thereof that control the flow of gas from said pipe to a burner (not shown) of the stove, and C designates the valve stem of the valve. As is well known, a

knob or handle (not shown) usually is secured upon the valve stem, whereby it may be rotated to turn the supply of gas on or off.

handle. The safety device, lettered D, comprises in generaha knob or handle7, longitudinally and rotatively movable with respect to the valve stem C, and clutching for 7, has a cylindrical recess 8, at its inner end,

the face of which is formed with one or more lugs 9, two being shown, whichare adapted for engagement with a clutch member or are disconnected from each other, whereby the knob may be rotated without rotating the valve stem. Said lugs 9 are shown as of V-shape formation, adapted to enter the spaces between the arms or points 11 of the Co-axially with said recess 8,

is confined a coiled compression spring 13 which bears against the star wheel 10, and

against the bottom or shoulder 14 at the end of the recess 12, and acts to yieldingly hold the knob in inoperative position with the lugs 9 out of contactwith the star wheel. The recess 12. has a reduced portion 15 extending to the outer-end of the knob, in which fits a tubular valve stem extension 16 that is internally screw threaded as at 18, and fastened upon the valve stem C. The inner end of the tubular valve stem extension 16 bears against the star wheel 10, and looks it on the valve stem C, and its outer end is formed with a head 17 which forms a stop limiting the outward movement of the knob. The star wheel is threaded upon the valve stem and locked in place thereon and rotates therewith and the valve stem extension 16 is locked upon the valve stem against relative rotation. The knob is freely rotatable and longitudinally movable upon the valve stem extension and normally held in contact with .the'head 17 v thelugs 9 into register with the spaces betive.

tween-the arms 11 ot' the star wheellO,

and thereupon moved toward the valve to bring the lugs into the spaces between the arms '11, in which position the valve stem 6 1113%" be turned by turning the knob or handle. Upon releasing the' knobthe sprii'ig returns it to inoperative position, withthe lugs 9 disconnected from the star wheel, in

which position it may be turned freely without .afl'ecting the valve stem.

From the foregoing description it is apparent that the valve-cannot be manipulated while the-knob is held in inoperative pos1- 'tion. and that the danger, present with the fixed knobxor handle, is reduced to a ininimum, and that the knob may be: instantly clutchedto the valve stem and made opera More orless variation of theexactdetai-ls of construction is possible" without departingwfi'om the spirit of this invention; 1 desire, therefore, not to limit'myselfxto the exact forni-o'f the construction :shown 1 and described, but intend,in the following claims to'point out all ot'the invention disclosed herein. v

I claim as new, and desire to; secure: by Tietters Patent:

1. A'safety gas valve, comprising a'ggas valvestem, having a threaded end portion,

a star wheel fixedly secured on said threaded 7 end portion of the valve stem, an internally; threaded tubular valve stem extension secured on said threaded endportion' of the valve stem; a knob having an operative and an inoperative position, rotatively' and longitudinally movable on said valve stein with: said star wheel;

extension, andformed with a lug adapted,

when in operative position, to operatively engage said star wheel,- and l a coiled" compressionjspring for yieldingly holding said knob in vinoperative position with saidnlug" out of engagement with sa1d star wheel.

2-. A-safety gas valve, comprisinga gas.

valve stern,having a threadedend portion,

a star wheel fixedly seeured 'o n said threaded end portion'of the valve ste1n, an internally threaded tubularvalve stem GXtQ-IlSlOliSB- cured on said threaded endportion of'the valve stem,- a knobhavingan operative and an ino iierative position, rotatively and longitud nally movable on said valve st-en'ifextension and formed with a cylindrical recess -at one end in which the star wheelis contained in both-positionsof the knob,'and; a coaxially rednced-aieoess beyond the same, the face of the first mentioned-recesshaving a 'lngi'adapted, when-in operative position, to operatively engage-said star wheel", and a coiled compression spring in said reduced recess bearingagainstisaid star wheel" and bottomof the; recess,- for yieldnigly holding said knob in inoperativeposition with said lug; out of engagement with said starwheel.

A= safety= gas valve-, -comprising.: a gas valve stemya star wheel fixedly secured thereon, tubular valve stem extension fixedly secured :on said stem, a: knob rotatably mounted and lengthwise movable (on said: stem extension from an inoperative po sition to an '0pG1'21t1Ve"pOS1t1OIl-' and having a: recess, the face of which is formed iwith a lug: capable of being operatively" engaged w=itlr1said star wheel, when in operative poreeess formed ina'said knob, bearingagainst sa d star:wheel and bottom of therecess 111 which it is confined;sa1d-spring operating to yieldi-nglyhbld said knob in inoperative sition,1saidstar Wheel beingcontained in said recess :in both positions of-the knob; and a coiled compression springconfined in a" position with: the lug: out 1 of .e11gag'e1nei'1t 7 MIoHAELJ; iioiiinwi

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