US1550313A

US1550313A - Pilot and gas cut-off

Info

Publication number: US1550313A
Authority: US
Publication date: 1925-08-18
Anticipated expiration: 1942-08-18

Description

J. GRAF, SR

'PILOT AND GAS CUT-OFF 1924 2 Sheets-Sheet l Filed Dec. 5

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J. GRAF, SR

PILOT AND GAS CUT-OFF Filed Dec. 5, 1924 2 sheets-sheet z Inausea Aug. 18.1925.

* 'juNi'rEu-jSTATES PATENT orifice'.

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Application Med Becember 5, 1924. Serial lo. 754,146. l

provements in a Pilot and Gas Cut-Oif of which the following is a full, clear, and exact specification.

This invention relates more lparticularly to a class of safety gas appliances.

My invention has for its object .primarily to provide a device wherein 'is employed a pilot and gas cut-olf for Iuse especially on gas stoves and the like to. enable the heating burners to be lighted whenrdesired for avoiding the which is of a form adapted to cause the main a. gas stove. A sprin supply of the gas to cut-oil automatically in event of thefilot llame being accidentally extinguish so as to ,overcomethe lia- -bility of liberation of the gas in buildings and other structures with thevconsequent danger of explosions and ,tire as' well as to overcome. the danglil' of persons occupying the premises iha ous prducts. y

The invention consists essentially of a chamber or casing' having an inlet adapted ifthe poisonous) gaseto be connected to the main s/upply of fuel.

gas, and having an outlet' adaptedto be connected to the feed pipe of the burners of actuated p valve -is movable inwardly `an youtwardly of the chamber `for admitt' d cutting-olf the low of gas, and a p1 ot burner having a valve controlled pipe leads fromsthe'chamber for providin a flame for use to ignite 'the burners of t e stove. Above the lpilot lburner is supported a disk of mica-for beingA heated .by the a'me to cause the disk to move toward the burner, and onthe mica disk 'is carried a clip adapted to be moved upwardly and downwardl with themovements of the disk. 'A lever is fulcrumed with one of its ends movable toward and `from the valve and so that its other eiidis` movable'. into and out of engagementwith the clip. 1'When the valve is moved against the tensionofits spring `to open the inlet ofthe chamber for admitting gases catch is provided f or releasably locking the valve. i When. the clip "is,

moved downwardly with 'the downwardly movement of the mica disk under the influence of the heat of the pilot flame the lever iapositioned into engagement with the clip,

frequent use f matches,I and meutary, of the device withits `sitions for operation.

and the catch is also Aadapted to releasably lock the lever so that in event of the acciting-off the ilow of gas into the chamber and to thestove for preventing accidents.

A further object of the invention is to pro- -vide a pilot and gas cut-oil of a simple, eicient and durable construction which may be .made Vin appropriate sizes and shapes.

With these and other objects in view, lthe invention will be hereinafter more fully ex- J plained with reference to the accompanying drawings formin a part of this specification in which similar characters of reference indicate corresponding parts in all the views, and will then be-pointed out in the claims at the end of the description.

In the drawings, Figure 1 isa top plan,

partly fragmentary, of o ne form o f pilot and gas,v cut-olf embodlying my invention. Fig. 2 is a side e Peris '1n p0- Fi 3 is an en'li ged side elevation, partly fragigrientry and partly` broken away, ofia number 'ofpai'ts o Ithe device. Fig, 4 is'an enlarged detail sectional view taken on the line 4-4'of 1l. Fi 5 is anenla d fragments sectional view .taken on e line 55-of 1g. 1, andf Fi .6 is an enlar fragmentarypview of a ortion of the p otburner 'used in the device.

The device has a chamber or casing 10 evation, partly frag- I which may be of any approtgriate size and shape, though the form'of lustrated .issubstantially 'lf-shaped to pmvide an inlet 11 in one of its ends, an outlet 12 in its ,upper part and an opening 13 mev in its second end which is opposite to the inlet 11. The inlet 11 is threaded for receiving the threaded end of .a pipe, as 14, leading-from a source of gas supply,- and the outlet 1 2 may also beintenorly t ended for receiving the threaded end of a pipe'as 15, Y

which may1 lead thel burnelrs o 4a lstov nots own'. Y eopemn vmay wiseebe threaded and in this open- .exterierlythreaded end ing is c1-wedde of a tubular or cylindrical member 16 hav ing itsf borein register with the inlet 11,

and the-inlet or the pipe 14 may be beveledV -as at 17, to provide a valve seat.

Reciprocable in the bore of the tubular member 16 isa valve 18 having a head 19 which may be made of rubber or other suitable material, and this head or valve is mounted on a stem 20 which is movable '1nwardly and outwardly of the chamber 10 through the tubular member. The valve head 19 is of larger diameter than the inn let 11 of the chamber, and the free end of head 19 prot-ru es beyond the tubular member, 16. On the free end of the exteriorly threaded part of the tubular member 16 y may be a suitable washer 22 which surrounds the stem 20 of the valve head 19 for preventing leakage of gas from the chamber through the passage of the tubular member. The end portion of the passage ofthe tubular member 16 opposite to the chamber 10,\may be enlarged, as at 23, with its wall being'threaded, andy in this threaded enlarged part is screwed a threaded gasket, as 24, whlch surrounds the stem 20 of thek valve. Also on the gasket 24 at the adjacent end of the tubular member 16 may be nut the receiving central part of the disk of mica is 25 for tightening thegasket in the tubular member.

Leadin from the interior of the receivi-l ing cham r 10 is a pipe 26 which termi-` nates with a burner 27 having one or a number of spaced holes therein for theI How of to provide a pilotame, as A.. Fig. 2.

f Ve pipe 26 isof a length for positioning the 'burner at a suitable distance from the chamber 10, and interposed in the pipe may,

be a suitable cock or valve 28 which is operative for controlling the feed of gas from `chamber tothe pilot burner 27. The pipe 26 of the pilot burner may be supported by a bracket or strap, as 29,`which extends from the tubular member 16. On the tubular member 16 is another bracket or strap, as 30, which supports one end of a bar ,31.` disposed -in splaced relation to the pipe 26 of the pilot urner. The vbar 31 may also be fastened, at 32, to the bracket 30, and this bar is of a length so that, its second end terminates in proximity to the ilot burner 27. 0n lthelsecond end, of

e bar 31 is carried an annular frame, e533,

' and in this frame is mounted a disk of mica,

The frame 33 isA so positioned vthat the spaced above the pilot burner 27 for the de A the burner when lighted to heatuthe mica 'mie mica f Mis of a .u so

Vmadera that the heat from the Rame will cause thev mica to be attracted thereto suiciehtly for the central part of the disk to move or bend downwardly or toward the pilot burner, as indicated' in dotted lines, at B, Figs. 2 and 3. On the centralpart ofthe u per face \of the mica` disk is a clip 35 whic is preferably in the form of a rod of substantially the .shape of an inverted L to provide a vertical armV 36 and lan arm 37 disposed angularly on an inclineltoward the Jrame 33 of the disk 34. The end of the arm 36 of the lLshaped-rod or clip 35 is ixed,.at 38, to the mica disk, and the arm as 40, of a size'that whenthe'arm raises a determined height it`,will contact with the arched part of. the strap; The beveled end 39 of the. arm 37 is geable by one (and of a lever 41 for automatically operating to cause the valve 18 to o rate for cutting-od the flow of gas throng the inlet 11 should the pilot iiame A be accidentally 'extinguished, as will be hereinafter more full explained.

T e lever 41 is preferably a form having a rod 42 disposed so that 'one ot its ends wi removably engage the beveled end 39 of the arm 37 of' the lrshaped rod or clip 35 when the lever is manually adj acoordingly. The otherv endportion of the rod 42er the lever 41 is fnlcruined or pivoted, at 43, to an arm 44 which protrndee angularly from Ia. sleeve, as 45, held, at 46, to part of the bar l31 of the rame'of the mica disk 34 in proximity to the hee end of the stem 20 of the valve or head 19. Adjacent the end` of the rod 42 opposite toits pivot 43 may be a weight 47 adapted to cause the rod 42 to move with a downward thrust when the rod is disengaged from .the L-shaped rod or clip 35, and part of the other end of ,the rod 42 rotrudes some distance, as at 48, beyond the pivot 43.

Potruding from the fixed sleeve adjacent the arm 44 is a lug 49 to the free end of which is pivoted, at 50, a catch, as 51, for releasably locking the lever when engging the clip or L-shaped rod 45 and for asably lookin the valve 18 in o talon from the et 11 of the receiving c amber 10; The catch 51 is preferably in the form of a block or short bar 52 ha 'imputer end portion cnt away or notched ngthwise, as at 5 3 to provide a tooth orlng, as 54. fra@ am te or @anni is en a te andere vswimg'laterally from the sleeve 45 over7theprotruding 41,- and the toothed bar is ofa. length as well as bein lpositionedfor -releasably en-` gaging a colar or annular. flange, as 55,

end 48 of the rod 42 ofthe lever g which is rovided on the stem 20 of the valve hea 19. To the bar 31 in spaced relation to theesleeve 45 of the Akcatch 51 is securedfat 56, one end of a bracket arm 57 having in itsother end anopening through 4Jwhich the stem'20 o the valve head is. dispod. (Bn the valve stein 20 in spaced rela' tion tothe bracket arm` 5T is held a Collar 58, and encircling the valve stem between the collar 58 and bracket arm 57is a spiral spring 5 9 tensined9 for normally serving to .e force the stemfin-a direction inwardly of the receiving chamber 10- for yieldin lyclosing the inlet 11 of the receiving cham r against the admission of'gas.

Wh'en the device is in use it iisfoperated byadjustably moving the stem of-the .valve 18 voutwardly, of the receivingham ber 10 against the tension ofthe spring 59 for unseating the valve head 19 to allow gas to flow into the receiving `chamber'. The

` lever 41 is moved for -positionin its rod 42.

into engagement with the bevele .end 39 of' 36 the cli'p or l -shaped Ifod-35, When the stem 20 of the valve 18 is moved 'so that its collar 55 is alongside the protruding end 48 of the rod 42 vofV the lever the'catch orblock 51 is swung .over the protnudingend 48 of the rod 42, andthe tooth 54 of the catch is ing the clip or k-shaped moved intoD engagement with the' collar 55 of the stem. 20. The valve 18 then will be rele'msably locked in open ,position from the inlet of the receiving chamber and tliue lever will be releasably held to the clip 35. With thelocking of these parts the,"A ilot burner 27 is lighted, l"and the flame A vo; the burner will heat the disk 34 of mica for causing the disk to bend sufficiently, as at B, 'forholdrod 35 in downward position with the lever'41` still' in engagement 4with the arr 37 of the clip. In

- event of. accidental extinguishing of the pilot ilame'the 4mica ldisk will rapidly cool and reversely move to its norma position.

TheA clip or L-shapedrod `35 willilikewiseY m'ove'upwardly`r and the engagement of its arm '31 with the lever 41/.wi11 be severed.

The lever will then automatically swing downward, 'and its protruding end 48 will move upwardly totalise the catch 51 tobe freed from .its engagement with the"collar -55 of the stem 20 of Ithe valve 18.` The tengas su pl sion of the spring 59 will move the stem inwardly of the receiving chamber for also movmgthe valve head 19 on the inlet 11 of the receiving chamber -to cut-oil' the flow of description, I'have embodied the preferred form ofmy inventiom.

but I do not to understood as limitflever when engagingthe clip.

ing myself thereto as I am awarethat modi-` andV outwardly -of the chamber, a' pilot burner on the chamber, a disk of mica s'upported above the burner for being heated- 'b v the flame othe pilot burner to cause the disk to move toward the burner, a clip carried bythe mica disk for being moved upwardly and downwardly with movements of the mica disk, a lever fulcrumed with one of itsends -movable toward and from the valve and the other end of the lever mov- `able into' and outof engagement with the cli l and a catchl supported `for releasably gf-the valve when `moved against `the `spring controlled valve Jmovable inwardly tension of its spring to open the inlet of 'the chambenand also to bereleasablyen gaged by the lever when engaging the clip.

2. `A..pilot and gas cut-oli', comprising a chamber having an inlet andan outlet, a stem movable inwardly and outwardly of the chamber, a valve on the stem within the chamber for opening and closing the inlet with movement of the stem inv thechamber,

a spring on thestem for normallyrforcing the stem and its valve yieldingly to Aclosed iositionl on the inlet of the chamber, a pilot urner leading *from the chamber, a disk o mica supported above the burner for being heated by Athe. flame of the pilot burner to cause the disk lto move toward the burner,

' a clip carried by the mica diskfor being moved upwardly and downwardlywith the movements of ,the mica disk, a lever fulcrumed with one of its ends movable toward and fromJ the stem of the valve and the other end of the lever movable into` and out of-en gagement with the clip, and a Ycatch supported for releasably locking thestem and tle valve when moved against the tension of the spring to open the inlet' of the chamber and also to be releasably engaged by the 3. A pilot andg'asfcut-oif, comprising a chamber having an inlet and an outlet, a

tubular member leading into the chamber -opposite to the inlet,l a stem ymovable yin the tubular member, a, valveon the st em within the` chamber or'opening and closmg the 1nlet with'- movement of the stem inwardlylll 'and outwardly lofthe chamber, a spring on the stem for normally forcing the stem and its" valve yieldingly to closed vposition on theinlet o f the chamber, a pilot burner having a valve controlled pipe leading lfrom the toward thefburner, a clip carried by the mica disk )for being moved upwardly and downwardly with the movements of the mica disk, a lever fulcrumed with one of its ends movabletoward and from the stem of the valve and the other end of the 'lever `movable -into` and out of engagement with vthe clip, and a catch supported for releasably'locking the stemand the valve when moved against the tension ot the spring to open the inlet-oi` the chamber and also to be. releasably engaged `by leverA lwhen engaging 4. A pilot and gas cut-od, comprising a chamber havin an inlet and an outlet, a Stem movable inwardly and outwardly of the chamber, a valve on the stem within the chamber for opening and closing-'the inlet withmovement of the stem in the chamber, a spring on the stem for normally forcing the stem and its valve 'yieldingly to closed sition'on the inletofthe chamber, a pilot urner having a valve controlled pipe lead-A ing from the chamber, a bar supported on the tubular member and disposed in spaced relation to the pipe of the pilot burner, a.

. disk'of mica supported by the bar for being heated by the llame of the pilot burner to cause the disk to move toward the burner, a clip carried by the mica dlsk for. being moved upwardly and downwardly with the movements of the mica disk, a lever fulerumed to the bar with one of its ends movable toward and from the stem of the valve 'andthe other end of the lever movable into and out of engagement with the clip, and a icatch on the bar for releasably locking the chamber having ^an inlet and an outlet, a

` tubular member leading into the chamber opposite to the inlet, a stem movable in the tubular member, a valve on the stem within the chamber for opening and closing the in let with movement of thestem inwardly and outwardly of the chamber, a springon the stem` for normally forcing the stem and its valve yieldingly to closed position on the inlet of the chamber, a pilot burnerhavmg a valve -controlled pipe leading from the Y chamber, an annular frame supported above the ilot burner, a. diskl of mica in the frameA for ing yheated by the flame of the pilot burner to cause the disk to move toward the burner, a. cli carried by the mica disk for move upwardly and downwardly with one of its ends movable.

tubular member, a valve' on the stem within the chamber for opening andqclosing the inlet with movement of the stem inwardly and outwardly of the chamber, a springon the stemfor normally forcing the stem and its valve yieldingly to closed position on'the`inlet of the chamber, a pilot burner having a valve controlled pipe leading from the chamber, a bar supported on the tubular member and disposed in spaced relation to the pipe of the pilot burner, an annular frame on the bar above the pilot burner, a

disk of mica in the frame for being heated by the flame of the pilot burner to cause the disk to move toward the burner, a clip carried by the mica disk for being moved up-v wardly and downwardly with the movements vof the mica disk, a lever fulcrumed to the bar with one of the ends ofthe lever movable toward and from the stem of the valve and the other end of the lever movable into and out of'engagement with the clip, a weight on the second end of the lever, and a. catch on the bar for releasably locking the stem and the valve when Imoved against the tension of the spring to open the inletL of the chamber and also to be releasably engaged by the lever when engaging the clip.

7. A pilot and gas `cut-off, comprising a chamber having an inlet and an outlet, a spring controlled valve ymovable 'inwardly and outwardly of the chamber, a pilot burner on the chamber, a disk of mica supported above the burner for being heated by the flame of the pilot burner to cause the disk to move toward the burner, a substantially L-shaped rod having the end of one of its arms fixed to the disk of mica with its other arm disposed toward said valve and the free end ofthe second arm of the L-shaped rod being beveled, a lever fulcrumed with one of its ends movable toward and from the valve and the other` end ofthe lever movable into andl out of engagement with the `beveled end of the `L-shaped rod, and a catch supported for releasably locking the valve when moved against the tension of its spring to open the inlet'of the rchamber and also to be releasably engaged by the. lever when en-u .gagillg the L-shaped rod. with the movements of the mica disk, a lever i `8.k A pilot and gas cut-off compri a. chamber an inlet end an oulgt a illet with movementv of the stem in the 'chamber, a spring on the stem` for nor- '.mally forcing the stem and its valve yieldinglyto closed position on the inlet of the chamber; 'a pilot burner leading from the chamber, a disk of mica supported above the biirner `for being heated by the flame of the pilot burner to cause the disk to Lmove toward the burner, a substantially L- shapedv rod having the nd of one of its arms ixed to the disk'l of mica with its other arm disposed toward the stem of said valve and the free end of the second arm fulcrumed with one of its ends movable toward and fromthe'stem of the valve and the other end of the lever movable into and out of engagement with the beveled end of ftu and also to` be releasably -the L-shaped rod. and a catch supported for releasably loe when moved against the tension' of the' ng the stem and valve the inlet of the chamber engaged by the -shaped rod.-

spring to open lever when enga gthe 9-A pilot and.m chamber havingan inlet and an outlet, a tubular member leading into thechamber oplpos'it to the inlet, a stem movable in the ular member,

inlet with movement of the stem inwardly and outwardly of the chamber, a spring on the stem for normally forcing the stem and its valve yieldingly to closed .position ,on the inlet of the chamber, a pilot burner having a valve controlled pipe leading from the chamber, a disk ofrmica supported above :the burner 'for being heated b i the llame of the pilot burner to cause he disk to move toward the burner, a substantiall L- shaped rod having the end of one o its arms fixed to the disk of 'micawith its other arm disposed toward the stem of said -valve and thefree end ofthe second'arm c of the L-ehaped rod being beveled, a lever ulcrumed (with one of .its ends movable toward and from the stem of the valve and the other end of the lever movable into and out of l ement with the beveled end of the L-sha rod, and a catch on the bar for releasably locking the stem and the valve when moved against the tension of thefspring to open the inlet of the chamber and also to be releasably engaged b the lever when engaging the L-shaped Aro l'10, A pilot an av chamber having an .inlet and an outlet a stem movable inwardly and outwardly o the chamber, a valve` on the stem within the chamberfor opening andi -closing the inlet- 'with movement o the stem in the chamber a spring on the. stem for-normally `shaped ro gas cut-oil, comprising a.

x a valve on the stem within; the chamber for opening and closing the gas cut-oil', comprising` l chamber having an inlet and an outlet, a

disposed in spaced relationto the pipe of the pilot burner, a disk of mica supported by the bar for being heated by the llame of` l the pilot burner to cause the disk to move toward the, burner, a substantially rL-shaped rod havino` the end of one of its arms fixed to the disk of mica with its other arm'disposed toward the stem of said valveand the free end of the second arm of the L'- shaped ,"rod being beveled,n a lever fulthe, lever movable toward and from the stem of thevalve and the other end of the'leven movableinto and out of engagementwith the beveled end of the L-shaped rod, and a catchon the bar for releasably locking the stem and the valve when moved lagainst the tension of the spring to open the inlet of the chamber and also to be releasably engaged br the lever when engaging the L- 11. A pilot and gas cut-olf, comprising a chamber h'avingan inlet and an outlet, a tubular member leadinginto the chamberl opposite to the inlet, a stem movable in the p a crumed to the bar with'one of the ends of of the L-shaped rod being beveled, a lever tubular member, a valve on the stem within thechamber for opening and closing the inlet with movement ofthe stem inwardly i and outwardly of the chamber a spring on the `stem for normally forcing the stem and its' valve yieldingly to closed position on'4 the inlet of the chamber, a

pilot yburner Vhaving a valve `controlled v pipe leading from the chamber, an an- 1 nular.. frame supported above the pilot burner,v a disk of mica in the frame for being heatedV b the llame of the ilot burner to cause the isk to move towar the burner, a substantially L-shaped rod having the end of one of its arms tixedto the disk ofmica with its other arm dis sed toward the stem of said valve and the ee end of the second arm of the L-shaped rod being beveled, 'a' lever fulcrumed with one of its ends movable toward and from the stem of the valve and the other end of the lever movable into and out of enga ment. with the beveled end of the L-shape rod, and' a catch 'on the valve when moved against the tension of the spring to open the inlet ofthe chamber and also to be releasably engagedb1 the n n lever when engaing the L-shaped ro 12. A pilot an gas cutoff, comprising a lbar for releasably locking. the stem and the KGV.

i and outwardly of the.y chamber a spring on the stem for normally forcing the stem and its valve yieldingly to closed position/gon the inlet of the chamber, a pilot burner having a valve. controlled pipe leading from the chamber, a barv supported on the tubular member and disposed in spaced relation to the pipe ofvthe pilot burner, an annular frame on the bar above the pilot burner, a disk of mica in the frame for being heated by the flame of the pilot burner to cause lthe disk to move toward the burner, a sub- 1 stantially L-shaped rod( having the end of one of its arms fixed to the disk of micav with its other arm disposed toward the stem of said valve `and the free end of the second arm of the'LLshaped rod being beveled, a lever fulcrumed to the .bar with one of the ends of the level` movable toward and from the stem of the valve and the other end of the lever-movable into and out of engagement with the beveled end of the L- shaped rod, a weight on the second end of the lever, and a catch on the bar for releasably locking `the stemand the valve when moved against the tension of `the spring to open the inletof the chamber and also to be releasably engaged by the lever when engaging the L-shaped rod.

This specification signed this 4th day of December, A. D. 1924.

JOHN GRAF, sie