US1551408A - Gas stove - Google Patents

Description

Aug. 25, 1925. 1,551,408

J. KRASNODEMSKY GAS STOVE Filed Jan. 30, 1 925 4 Sheets-Sheet 1 F la 13. I

Aug. 25 1925. 1,551,408

J KRYASNODEMSKY qAs STOVE Filed Jan. 30. 1925 4 Sheets-Sheet '5 Aug. 25, 1925. 1,551,408

J. KRASNODEMSKY GAS STOVE Filed Jan. 3 1925 4 Sheets-Sheet 4 #IG. 1 5 z I I l' 1 ll 1 I T Wu J 3] I y g I a v i FIG-L18;

FIQZTI.

a citizen of 'Poland, residing at.Milwaukee,-'

Patented Aug. 25, 1925.

um'rao's'rarss ATENT" OFFIC E.

' JOHN xnasnonnmsn, or MILWAUKEE, wrsconsm, assmuoa or ,nrmn' rm.

cam 'ro Jenn oonsxr. or wausau, wrsconsm.

GAS STOVE.

Application museum; :0, m5. Serial 1110. 5,757.

To all whom it may concern:

Be it known that I, vJ OHN' KRASNODEMBKY,

in the county of- Milwaukee and State of Wisconsin, have invented certain new,and

useful Improvements in Gas Stoves, of which the following is a specification.

This invention relates to certain new and useful improvements in gas'stoves and has particular reference to the burner valve that controls the flow of gas to the burner and has for its primary object to provide a thermostatic element associated with ten-' sioned devices that hold the-gas valve in an open position adapted to be operated to release or'close the gas valve should the gas flame become, accidentally extinguished while the valve is in an open position.

A further object of the invention is to rovide thermostatically operated controling means for the valve of a gas burner wherein extensible 'members disposed directly above a burner head have operative connections with a main gas valve to effect movement of the latter upon expansion to permit the main valve to be moved to its closed position by the assistance of a'spring device attached thereto.

A further object of the invention is to provide a thermostatic attachment for the controlling valves of gas, stoves wherein a tensioned latch device associated with the valve holds the same in its open. position when initially opened, the thermostatic attachment when heated by the burner head operating to retain the valve in its open position and to release the tension retaimng means, and further operating u on contraction thereof should the burner ame become accidentally extinguished to release'the valve and permit ,the tension device to permit the valve to close; 1

A still further object of the invention is to provide in a gas burner of the type above set forth, a novel construction of valve hav ing a main rotatable valve sleeve and a controlling valve stem whereby the flow of gas may be controlled after the'main valve has been moved to its completely opened position.

It is a further object of the invention to provide a thermostatic attachment to effect the automatic closing of. a gas valve upon accidental extinguishing of a burner flame wherein the valve is spring pressed to its.

' shifted closed position and is manually retained in its open position against spring tension thereon until the thermostatic device is expanded by the burner flame for engagement with the valve.

With the .above and'other objects in view and others that will become apparent as the nature of the invention is better understood,

the same consists of the novel form, combinat1on and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

showing the gas valve in its open position and the spring closing device associated therewith, Figure 5 is a detail sectional view taken on line V-V of Fig. showing the spring finger for initially holding the valve 1n its opened osition and the thermostatically lock carrying the abutment arm that. retains the valve opened,

Figure 6 'is a detail sectional view taken on line VIVI of Fig. 3 showing the lever connection between the thermostatically operated devices and the valve controlling member,

7 Figure gas valveshowing the rotatable. sleeve enclosing the rotatable stem,

Figure 8 is, a horizontal sectional view taken on line VIIIVIII of Fig. 7 showing the operating. cross head for the rotatable valve sleeve,

7 is a vertical sectional view of the Figure ,9 is a cross-sectional view taken on line ,IXIX of Fig. 7 showing the valve sleeve in .its closed position, a

Figure 10 is a horizontal sectional vlew,

similar to Fig; 9 showing the valve sleeve and stem in their open positions,

Figure is a perspective view of the thermostatically shifted block carrying the abutment arm that holds the valve in it opened position,

Figure 12 is a perspective View of one of the thermostatically operated levers,

Figure 13 is a fragmentary top plan View,

ing the valve controlling mechanism in front elevation,

Figure 15 is a fragmentary cross-sectional view, I

Figure 16 is a fragmentary top plan view of the valve controlling devices with the valve illustrated in its opened position,

Figure 17 is a perspective view of the transversely shiftable thermostatically controlled rack bar for shifting the valve controlling devices,

Figure 18 is a perspective view of one of the thermostatically shifted lever arms,

Figure 19 is a fragmentary elevational view, partly in section, showing the operating means for the abutment arm that is moved into the path of movement of the valve,

Figure 20 is a horizontal sectional view taken on line XX-XX of Fig. 19, and

Figure 21 is a detail view, partly in section, showing in elevation the arms for holding the valve opened.

Referring more in detail to the accompanying drawings, and particularly to Figs. 1 to 12, reference numeral 1 designates the top frame of a gas stove having a burner head 2 disposed beneath a grid opening as shown in Figs. 1 and 3, the burner head 2 being carried by a pipe section 3 that is secured to the stove top 1 through the medium of bracket arms 4 cooperating with the lugs 5 on the stove frame as clearly illustrated. The outer end of the pipe section 3 is provided with the usual air chamber 5' that is entered by the branch gas pipe 6 connected to the main gas pipe 7, as is customary in the ordinary gas stove.

As shown more clearly in Fig. 1, a rectangular frame is associated with the burner hea and pipe section 3, the same including sid bars 8 and end bars 9,. a plate' 10 projecting forwardly of the outer end bar, overlying the pipe section 3 and being suitably secured to the upper wall of the air and gas mixing chamber 5'. Thermostaticallv expansible arms 11 that are perforated, as shown in Fig. 1,.over'lie the burner head and are of arcuate formation, the rear ends thereof being secured as at 12 to the rear cross bar 9 of the supporting frame while the forward ends thereof aresecured memes 'mounting 16 are notched as 17 to receive the studs 14 that depend from the block 13 carried by the thermostatic arms 11. A curved lever 18 of the type best illustrated in Fig. 1 is pivotally supported at 19 upon the plate 10. Link connections 20 extend between the lever 18 and the outer free swinging ends of the lever arms 13, the links 20 being connected to the lever at opposite sides of the pivot point 19 thereof so that upon expansion and contraction of the, thermostatically operated arms 11, the depending studs 1% engaging in the notches 17 of the lever arms will move the latter upon their pivotal mount lugs 16 and through the medium of the link connections between the lever arms 15 and the lever 18, the latter is caused to spring upon its pivotal mounting 19.

A shaft 21 is rotatably supported above the plate 10 in bearings 22 and 23 carried by the plate and a raclr segment 24 fixed to the shaft 21 adjacent the bearing 23 and depending from said shaft is engaged by the rack 25 formed at the outer end of the lever 18. It will, therefore, be seen that upon movement of the lever 18, the shaft 21 is rotated for purposes presently to appear.

A valve block is interposed in the branch pipe 6 and the flow of -gas from the main pipe 7 through the branch 6 to the burner head 2 is controlled by the type of valve shown in detail in Figs. 7, 9 and 10. The valve block26 is provided with the horizontal longitudinally extending bore 27 intersected by the vertical tapering valve receiving socket 28. A. tapering sleeve valve 29 is rotatably supported in the socket 28 and has lateral ports 30 that are adapted to be moved in registration with the bore 27 in the valve block. A valve stem 31 is rotatably supported in the sleeve valve 29 and has a transverse port 32 adapted to register with the ports 30 and bore 26 for regulating the amount of gas flowing through the valve blocks into the burner head 2. The sleeve valve and valve stem are retained in position in the valve block 26 by the set screw and collar 33 associated. with the lower end of the valve stem and valve block.

The sleeve valve and valve stem are independently operable, the upper end of the sleeve valve having diametrically opposite 'fiattened sides 3 1 with-a cross head 35. re-

ceived on the upper end of the sleeve valve and interlocked therewith as shown in Fig.

Sill

liJ

end of the valve stem 3]; so that when the sleeve valve 29 is 0 ened'to its fullest position as shown in Flg. 10,'thevalve stem 31 may be independently operated toregulate the flow of gas through theyalve block to the burner head.

'The sleeve ,valve 29 is normally'retained in its closed position by a spring device that includes an arm 37 pivotally supported upon a bracket 38 as shownin Fig. 4 with a rod 39 freely slidable through the arm 37 being pivotally connected to the pin 40 projecting from one end of the cross, head 35. A pair of rods 41 are fixed to the arm 37 and are surrounded by coil springs 42 that are confined between the arm 37 and the plate 43 that is slidable on th'e'rods 41 while the outer end of the rod 39 has a nut 44 threaded thereon outwardly of'the plate 43 to retain the springs 42 under tension. It will, therefore, be seen that the tendency. of the springs 42 is to move the plate43 toward the outer ends of the rods 41 and the connection between the rod 39 and cross head 35 causes the sleeve valve 29 to be held in a closed position.

The braces are provided for holding the sleeve valve 29 in its fully opened ition against spring tension, t ereon w en the burner head 2 is to be ignited and such devices are subsequently thermostatically operated to retain the sleeve valve fully opened and includes a block 45 shown in detail in Figs. 5, 6 and -11 that is shiftably mounted beneath the ledge 46 carried by the valve block 26 and is guided in its movements by the screw stud 45" anchored in the ledge 46 that freely extends into an opening in said block. A'bracket 47 projectingoutwardly of the ledge 46 pivotally supports as at-48, a bell crank lever 49. As shown in Fig. 6, the, lower end of the bell crank lever 49 is notched as at 50 and carries a forwardly directed arcuate finger 51 to receive the in 52 projecting from the arm 53 that is carried by the upper end of the block 45 to hold the block 45 in position. An arm 54 fixed to the shaft 21 depends therefrom and a connecting link 55 extends between the lower end of the arm 54 and the upper end of the bell crank lever 49. As shown more clearly in Figs. 5

- and 11, the block 45 carries anup'wardly directed abutment arm 56 that extends through an opening 57 in the ledge 46 and has an abutment" shoulder 58 upon the upper end thereof. A latch .pin 59 tensioned as at I 60 is supported-in the-opening 61 of the block 45 and projects upwardly through an opening in the ledge 46 for app The cross purposes now to head 35 fixed to the upper end of the sleeve valve. 29 includes a side extenkey 66 that is secured to the upper end of the valve stem 31.

With the parts in, their normal position the position shown in Fig. 1- with the pinholding the cross head and sleeve valve in open position against the tension ofthe springs 42. The burner head 2 is then ignited and the flame therefrom contacting the thermostatic arms 11 cause expansion thereof and pivotal movement of the lever arm 15 and lever 18 to effect-rotation of the shaft 21, operation of the bevel levers disposed between the shaft and lock 45 to lower the block, disengage the pin 59 from the cross head 35 and dispose the abutment arm 56 iii the pathof movement of the cross head to retain the sleeve valve 29 in its opened position. The flow of gas to the burner is then manually controlled by the valve stem 21 in a manner will be readily understood from an inspection of Figs. 7, 9 and 10.v Should the burner head 2 become accidentally, or

otherwise extinguished, contraction of the thermostatic arms 11 would immediately transpire to cause a reverse operationof the lever arms 15 and lever 18 and through the rack connection between the lever 18 and shaft 21, the block 45 would be elevated to displace the abutment arm 56 from the path of movement of the side arm-of the cross head 35 and permit the tensioned device associatedwith the cross head to shift the same and the sleeve valve 29 to its closed position, thereby automatically cutting off the supply of gas to theburner head. i

In the form of the invention illustrated in Figs..13 to 21, the majority of the elements areof like construction with special reference-, to the thermostatic arms, the valve mechanism and spring device associated therewith, the lever arms 15 being pivotally supported upon the plate 10 asat 16 and having openings 17* into which the pins 14 carried by the block 13 extend. The lever 18 as shown in detail in Fig. 17 has pivotally connected thereto as at 70, a slide 71 having rack teeth 72 upon a flanged side thereof that engages a toothed wheel 24 fixedto the shaft 21.

In this form ofthe invention, it is required that the sleeve valve 29 be manually retained in its .open position pending the operation of the thermostatically operated devices that holdthe valve open, and in lieu.

of theblock 45 .as's howninFig. 5 and its associated elements, there is substituted a bell crank lever 49 supported upon the bracket 417 carried by the ledge 46 with one end of the bell crank lever forked as at 73 and shown more clearly in Figs. 19 and 21. A perpendicular stud 74 carried by the ledge 46 slidably supports the bearing 75 of a blade 76, rotation of the hub 75 being prevented by the pin 77 projecting from one side thereof and disposed between the posts 78, this latter construction being more clearly shown. in Fig. 20. The stud 'Z 9 carried by the upper side of the valve block limits the opening movement of the valve by engaging the cross head and in the normal position of the parts, the lower edge of the blade 76 is disposed above the path of movement of the cross head to permit the latter to be moved to the position shown in Fig. 16. When the valve has been opened and the burner head 2.

ignited, the valve is manually retained in its open position until the thermostatic arms 11 operate the levers and links for shiftin the bell crank lever 49* to lower the bla .e 76 into the path of movement of the adjacent end of the cross head, and at which time the valve-will be retained in its opened position by said blade. The amount of gas flowing to the burner head may-be controlled by the 7 Valve stem as in the other form of the invention, the material difference between the two forms of the invention being that one of the valves is mechanically retained in its opened position pending operation of the thermostatic devices for retaining the same opened while the other is manually retained in its open position pending the operation of the thermostatic devices for so retaining the same. In each form of the invention, the thermostatic devices operate to release the valve holding means upon accidental or other extinguishing of the flame from the burner head to permit the sprinv device ,as' sociated with the valve to close t e same.

While there are herein shown and described the preferred embodiments of the present invention, it is nevertheless to be un- 'derstood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

'What is claimed as new is 1. In an automatic cut-tofi for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, said thermostatic device including thermostatic arms disposed above the burner, a plate pivctally supporting a series of levers, connections between the thermostatic arms and a pair of levers, means for holding the valve in its opened position,

andabiitinent devices operated by said le T vers for retaining the valve opened 2. In an automatic'cut-off for gas burnertion thereof, a spring device associated with the valve for normally moving the same to its closed position, said thermostatic device including thermostatic arms disposed above the burner, a plate pivotally supporting a series of levers, connections between the thermostatic arms and a pair of levers, means for holding the valve in its opened position, and abutment devices operated by said levers for retaining the valve'opened.

3. In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, said valve embodying a main gas-flow controlling sleeve valve, an independently operable'valve stem rotatable in the sleeve valve, 'said therfnpstatic device including thermostatic arms disposed above the burner, a plate pivotally supporting a series of levers, connections between, the thermostatic arms and a pair of levers, means for holding the valve in its opened position, and abutment devices operated by said levers for retaining the valve opened.

4. In an automatic cut-ofl forlgas burner tion thereof, a spring device associated with 1 the valve for normally moving the same to its closed position, said valve embodying a mam gas-flow controlling sleeve valve, an-

independently operable valve stem rotatable in the sleeve valve, said thermostatic device including thermostatic arms disposed above the burner, a plate pivotally'supportlng a series of levers,- connections between the thermostatic arms and a pair of levers, means for holding the valve in its opened position, and abutment devices operated by said levers for retaining the valve opened.

5. In an automatic cut-01f for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, a spring device associated with thevalve for normally moving the same to its closed position, sald valve embodying a main gas-flow controlling sleeve valve to which thespring device is connected, an independently operable valve stem rotatable in the sleeve valve, said thermostatic device inseries of levers, connections between the thermostatic arms and a pair of levers,

'means for holding the valve in its opened position, and abutment devices operated by said levers for retaining the valve opened.

6. In an automatic cut-ofi' for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner andvalve adapted to hold the valve opened upon expansion and:

operating to release the valve upon COI1t1t10- tionthereof, said thermostatic device, including thermostatic arms disposed above the burner, a plate pivotally supporting a series of link connected levers, connections between the thermostatic arms and a pair-of said levers, a shaft journalcd above the plate, a rack and pinion connection between the end of one lever and said shaft, means adapted to be moved into the path of move ment of the valve, .and operative connections between the last named means and said shaft.

7. In an automatic cut-off for gas burner valves, thecombination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expanslon and o )erating to release the valve upon contract1on thereof, a sprin device associated with the valve for norma ly moving the same to its closed position, said thermostatic device including thermostatic arms disposed above the burner, a plate pivotally supporting 'a series of link connected levers, connections between the thermostatic arms and a pair of said levers, a shaft journaled above the plate,.a rack and pinion connection between the end of one lever and said shaft, means j adapted to be moved into the path of movement of the valve and operative connections between the last named means and said shaft. 8. In an automatic cut-ofi' for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, said valve embodying a main gas-flow controlling sleeve valve, an independently operable valve stem rotatable in the sleeve valve, said thermostatic device incltiding thermostatic arms disposed'above the burner, a plate pivotally supporting a series of link connected levers, connections between the thermostatic arms and a pair of said levers, a shaft journaled above the plate, a rack and pinionconnection between .the end of one lever and said shaft, means adapted to be moved into the path-of movement of the valve, and operative connections between the. last named means and said shaft. a

v '9. In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted 'to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, a spring device associated with the valve. for normally moving the same to its closed position, said valve embodying a main gas-flow controlling sleeve valve, an independently operable valve stem rotatable in the sleeve valve, said thermostatic device including thermostatic arms disposed above series of lin-kconnected levers, connections between the thermostatic arms and apair of the burner, a plate pivotally supporting a between the last named means and. said.

shaft. v

' 10. In an automatic cut-ofi' for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, a spring device associated with the valve for normally moving the same to its closed position, said valve embodying a main gas-flow controlling sleeve valve to which the spring. device is oonnected, an independently operable valve stem rotatable in the sleeve valve, said thermostatic device including thermostatic arms disposed above the burner, a plate .pivotall'y supporting a series of link connected levers, connections between the thermostatic arms and a pair of said levers, a shaft journaled above the plate, a rack and pinion connection between the end of onelever and said shaft, means adapted to. be moved into the path of movement of the valve, and operative connections between the last named means and said shaft.

11.. In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon'expansion and operating to release the valve u on contract1on thereof, said valve inclu ing a valve block having a gas. passa e therethrough, a sleeve valve rotatable in t e block, a. valve stem. rotatable in the sleeve indeppndently thereof, a cross head secured to t 6 up er end of the sleeve, a valve handle secure to the upper end of the stem engaging devices carried by the valve handle .and cross head whereby the sleeve valve is rotated to its open position upon movement of the valve handle, and means operated by the thermostatic device to be moved into the path of movement of the cross head to retain the sleeve valve in its open position.

12. In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to through, a sleeve valve rotatable in the 1, the

block, a valve stem rotatable in the sleeve inde endently thereof, a cross head secured to t e upper end of the sleeve, a valve handle secured to the up er end of the stem engaging devices carried y the valve handle andcross head whereby the sleeve valve is rotated to its open position upon movement of the valve handle and means operated by the thermostatic device to be moved into ath of movement of the cross head to retain the sleeve valve in its open position. 13, In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, said valve embodying a main gas-flow controlling sleeve valve, an independently operable valve stem rotatable in the sleeve valve, said valve including a valve block having a gas passage therethrough, a sleeve i valve rotatable in: the block, a valve stem rotatable in the sleeve inde endentlythereof a cross head secured to t e upper end .0 the sleeve, a valve handle secured to the up er end of the stem engaging devices carried by the valve handle and cross head whereby the'sleeve 'valve isrotated to its open position upon movement of the-valve handle and means operated by the thermostatic device to be moved into the path of. movement ofthe crosshead to retain the sleeve valve in its open position.

14; In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve ada ted to hold the valve 0 ened upon expansion. and

operating to re ease the valve upon contraction thereof, a spring device associated.

with the valve for normally moving the same to its closed position, said valve embodying a main as-flow controlling sleeve valve, an indeuen ently operable valve stem rotatable in tlie sleeve valve, said valve including a valve block having a gas passage therethrough, a sleeve valve rotatable in the block, a valve stem rotatable inthe sleeve independently thereof, across head secured to t e upper end of the sleeve, a valve handle secured-to the upper end of the stem I engaging devices carried by the valve handle and cross head .-whereby .the sleeve valve is rotated to its open position upon movement of the valve .handle, and means operated by the thermostatic device to be moved into the path of movement of the cross head to retain the sleeve valve in its open position.

15. In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted .to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, a spring device associated with the valve for normally moving the same to its closed position, said valve embodying secured to the upper end of the stem engaging devices carried by the valve handle an cross head whereby the sleeve valve is rotated to its open position upon move ment of the valve handle, and means operated by the thermostatic device to be moved into the .path of movement of the cross head toretain the sleeve valve in its open position.

valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating to release the valve upon contraction thereof, said valve including a valve block having a gas passagetherethrough, a sleeve valve rotatable in the block, a valve stem rotatable in the sleeve independently thereof, a cross headsecured to the upper 16. In an automatic cut-off for gas burner valves, the combination" with a burner and endof the sleeve, a valve handle secured .to the upper end of the stem engaging devices carried by the valve handle and cross head whereby the sleeve valve is rotated to its open position-upon movement of the valve handle, means operated by the thermostatic device to be moved into the path of movement of the cross head to retain the sleevevalve in its open position, said means including a block movably associated with the valve block, a tensioned pin carried by the block for initial engagement with the cross head to retain the sleeve valve. open and an abutment arm carried by the block movable therewith upon operation of the thermostatic device to engage the cross head and retain the valve open. 1

17 In an automatic cut-off for gas burner isa valves, the combination with burner and .valve, of a thermostatic device interposed between the burner and valve adapted to holdethe valve opened upon expansion and operating to release the valve upon contraction thereof, a spring device associated with the valve'for normally moving the same to valve bloc its closedjposi'tion, said valve including a having a gas passage therethrough, -a sleeve valve rotatable in the block, a valve 'stem rotatable in .the sleeve independently thereof, a cross-head secured to the upper end of the sleeve, a valve handle secured to the upper end of the stem engaging devices carried by the valve handle and cross head whereby the sleevevalve iscarried by the block forinitial engagement with the cross head to retain the sleeve valve block movable therew th upon ope .ation of.

open and an abutment arm carried by thei block movable therewith uponoperation of the thermostatic device to engage the cross. head and retain the valve open. 1

18. In an automatic cut-oil for 'gas burner valves, the combination with a burner and valve, of a thermostatic device interposed between the burner and valve adapted to hold the valve opened upon expansion and operating' to release the valve upon contraction thereof, said valve embodying a main gas-flow controlling sleeve valve, an independently operable valve stem rotatable in the sleeve valve, said -valve including a valve block havinga gas passage therethrough, a sleeve valve rotatable inthe block, a valve stem rotatable in the sleeve independently thereofila t e cross head secured tothe upper end of,

sleeve, a valve handle secured to the upper end ofthe stem engaging devices carried by the valve handle and cross head whereby the sleeve valve is rotated to its openposition upon movement of the valve handle,

means operated by the thermostatic device to be moved into the path of movement of the cross head to retainthe sleeve valvein its open position, said meansQincluding a block movably associated withthe valve block, a tensioned pin carried by the block for ini-v tial engagement with the cross head-to retain'the sleeve valve open and an abutment arm carried bythe block movable therewith upon operation of the thermostatic device to engage the cross head and retain the valve open.-

19. In an automatic cut-off for gas burner valves, the combination with a burner and valve, of a thermostatic device interposed-.7 betweefl the burner and valve adapted an o,

hold the .valve opened upon expansion operatingyto release the valve upon contraction thereof, a spring lly moving the same to in the sleeve valve, said valve including avalve block having a gas passage there-- through, a sleeve, valve rotatable in the block, a valve stem rotatable in the sleeve independently thereof, a cross head secured to the upper end of the sleeve, a valve handle secured to the u peren'd of the stem engaging devices carried-by the valve handle and cross headwhereby the sleeve valve is rotated to'its open position upon movement of the valve handle, meansoperated by the thermostatic device to be moved into the path offmovement of the cross head to retain the sleeve valve in its open position,'-said means including a block movably associated with the valve block, a tensioned pin carried by the blockefor initial engagement with the cross head to retain thesleevevalve open and an abutment arm carried by the the thermostatic v,d'evice to engage he cross head. and retain the'valve 0' en.

20. In anautomatic cut-o for gas burner valves, the combination with a burner and valve, of. a thermostatic device interposed between the. burner and valve adapted to hold the valve openedlpon expansion and operating to release the valve upon contrac-' tion thereof, aspring eviee associated with the valve for normally moving the same to its closed position, said valve embodying a main gas-fiow controlhng sleeve valve to which the spring device is connected, an'independently operable valve stem rotatable in the sleeve valve, said valve including a valve block having a gas passage there- .through, av sleeve valve rotatable 1n the.

block, a valves'tem rotatable in the sleeve independently thereof, a cross head secured to the upper-end of the sleeve, a valve handle secured to the upper end of the stem engaging devices carried by the valve handle and cross head whereby the sleeve valve-is rotated to its open positionupon movement of the valve handle, means operated by the thermostatic device to. be move the sleeve valve in its open osition, said by the block for initial engagement withthe into the a path of movement of the cross hea to retaincross headto retain the sleeve valve-open and an abutment. arm carried by the block movable therewith upon operation of the thermostatic device to engage the crosshead and retain thevalve open.

In testimonywhereof I afiix'my signature.

. JIOI-ZIN K RAsi o'nEMsKY.

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