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July 9, 1946. w_ A, RAY 2,403,61 1 RESET VALVE. AND CONTROL THEREFOR Filed Feb. 4, 1941 4 Sheets-Sheet l 6 July 9, 1946- w. A. RAY 2,403,611 RESET VALVE AND CONTROL THEREFOR Filed Feb. 4, 1941 4 sheets-sheet 2 / /// /// 9.2 wwww76 I”.Nmv .m w vm _ „ m w TF.Ty ,E Y lJuly 9, 1946. w. A. RAY 2,403,611 RESET VALVE AND CONTROL THEREFOR Filed Feb. 4, 1941 4 sheets-sheet s 12ga@ ‘ ATTORNEY July 9, 1946. 2,403,611 w. A. .RAY RESET VALVE AND CONTROL THEREFOR Filed Feb. 4,‘ 1941 4 sheets-sheet 4 Fig-13 jg. 11 4 lvl / INVE NTOR IL % -m A l/l//Y//am A. /PaV Jn BY i ATTORNEY >2,403,611 Patented July 9, 1946 UNITED STATES PATENT OFFICE 2,403,611 RESET VALVE AND coN'rnoL 'rHER'EFoR William A. Ray, Glendale, Calif., assignor to General Controls Co., a. corporation Application February 4, 1941, Serìial No. 377,274 12 claims. (Cl. 137-144) l This invention relates to a fuel burner system, and particularly to a safety valve control, incor porating a thermocouple and a reset mechanism, for use in controlling the flow of fuel to the sys tem. Such systems usually include an automatic cut oif valve to ensure against flow of fuel to the burner while the burner is unlighted. A valve of this character may be arranged to be main tained open for example by an electro-magnet energized by a thermocouple in the pilot ñame, and hence being open only so long as the pilot burner remains lighted. Thereafter, the main cock may be turned on and 01T as desired, the pilot flame serving to ignite the fuel passing through the main burner whenever the cock is opened. . _ 2 - power o1’ very low value, such as one or two milli watts. - ‘ It is still another object of this invention to ensure that the closing of the safety valve occurs without material delay after the pilot flame fails. This is accomplished by using as little mass as io practicable in the thermocouple conductors, s0 that the cooling of the thermocouple occurs promptly upon pilot flame extinguishment. This invention possesses many other' advan tages, and has other objects which may be made more easily apparent froma consideration of sev- _ eral embodiments of the invention. For this pur pose there are shown a few forms in the draw ings accompanying and forming part of the pres . ent speciñcation. 'I'hese forms will now be de scribed in detail, illustrating the general principles of the invention; butit is to be understood that Valves of this general character are described this detailed description is not to be taken in a in applications filed in the name of William A. Ray, on February 19, 1940, Serial No. 3119.735, en 20 limiting sense, since the scope of the invention is best defined by the appended claims. titled "Fluid control valve,” and on March 20, 1930, ' In the drawings: Serial No. 324,987, entitled “Valve reset mecha Figure 1 is a view, mainly in section, of th'e reset nism.” valve, including an improved thermocouple for It is an object of this invention to provide a . valve of this type of compact and simplified con 25 controlling the valve; Fig. 2 is a similar view of a fragment of Fig; 1 struction. showing another position of the valve; . It is another object of this invention to provide Fig, 3 is a top plan view of the valve, partly in a reset valve arranged for use in connection with controlling the individual burner units of a mul 30 section, as indicated by the arrows 3-3 in Fig.~1; Fig. 4 is a section as seen on plane 4--4 _of tiple unit furnace. Fig. l; In providing a safety shut off valve, considera Fig. 5 is a section as seen on plane 5_5 of tion must be given to the electric power that is 'Fig 4: required to hold the valve in open position. This Fig. 6 is a section as seen on plane 6-6 of power is generated thermoelectrically by the aidFig. 1; of a pilot flame. For the function of igniting the 35 Figs. ’l and 8 are detail sections as seen on cor main burner,- the flame can be quite small, and it respondingly numbered planes of Fig. 1; ’ is advantageous to be able to generate the req Figs. 9 and 10 -are diagrams illustrating the uisite electric power without the necessity of operation of the valve; any substantial increase in the size of the pilot 40 Fig. 11 is a section similar to Fig. 4, but showv`s burner flame. By the aid of the present inven ing a modif-led form of- valve; tion, this advantage is readily obtained; and par Fig. l2 is a fragmentary section as seen on plane ticularly by the particular structure of the ther |2-l2 of Fig. 11; and ` moelectric generator. This'generator is simple in y Fig. 13 is a showing in diagrammatic form of a structure, utilizing but a single thermocouple. By 45 system including a multiple unit furnace co trolled by reset valves._ f ' couple as taught herein, it is possible to generate The valve _I is shown as coupled to a conduit 2 a relatively high electromotive force, making it larranged to supply. gaseous or liquid fuel to a possible to utilize a higher resistance for the coil burner (not shown). The valve structure I is a of the electromagnet for holding the safety valve 50 dual valve, including the main gas cock 3 arranged open, and yet obtain the maximum power from formanual contro1 and the automatic shut-oil, the thermoelectric generator. v valve k4. Fuel under pressure is admitted to the It is another object of this invention therefore, ‘valve structure I by conduit 5. to make it possible to maintain the safety valve It is apparent that when the automatic shut the arrangement and structure of the thermo open by the aid of thermally generated electric 55 oil' valve 4 is closed, as in Fig. 1, no fuel can be 2,403,8 1 1 delivered through the main' cock 3. The valve 4, however, is so arranged that it may be held in its open position, placing the control of the ñow of fuel entirely in the main cock 3. The valve structure I includes a body I0 for accommodating the main cock 3, and the auto is guided axially with respect to seat 35 by stem 33 and may be moved toward or away from seat 33 by lever 42. Body I0 is divided into an inlet chamber 55 and an outlet chamber 53 by that portion 51 of the body carrying valve seats I2 and 33. This portion 51 as shown most clearly in Fig. 3, is of general cylindrical structure. Fuel is admitted to matic valve 4, together with the means for open ing the latter. thus providing a simple and com pact structure with no exposed moving parts. inlet chamber 55 by conduit 5 which is secured . The main cock 3 comprises a rotatable hollow 10 in body i0 by conventional pipe threads. Fuel is tapered plug II, seated in a cooperating conical conducted from outlet chamber 53 by means of seat I2 formed in body I0. In the position of conduit 2. As shown, body I0 is provided with Fig. 1, the plug Il is in closed position, the dis an exteriorly threaded extension 53, to which charge opening I3 of the plug being out of aline conduit 2 is secured by a pipe coupling 53. Ob-_ ment with the outlet port I4 in body I3. The 15 viously, if valve closure 3l is seated communica tion between chambers 55 and 53 is stopped. If inlet to the plug is formed by the axial bore I5, which is open at the bottom of the plug. closure v3| is unseated, communication between The plug II is urged to its seat I2 for substan these chambers may be controlled by rotating tially fluid tight operation. as by the aid of a ~ plug I I from the position shown to that in which v compression spring I3. This springLis disposed 20 ports I3 and I4 are in communication, or vice around a post I 1 connected to and projecting up versa. ’ wardly from the upper end of plug II, the lower The mechanism for unseating closure 3l will now be described. Slidably supported in‘body end of the spring seating on the bottom I3 of a portion 51 for movement parallel with the axis counterbore I3 formed in the cylindrical boss 3 of body III. The upper end of spring I3 àbuts 25 of plug Il is a push rod 32, the lower portion oi.’ a stop plate 20, firmly secured to post I1. Thus, which extends through an opening 33 in lever 42 post I1 has its upper end portion 2| of reduced (Figs. 1 and 8). The lower end of rod 32 is pro diameter with a square base portion 3 forming a vided with a thin nut or other means forming a shoulder 34 thereon, a compression spring 35 be shoulder 22 for the accommodation of plate 23 and threaded for the reception oi' a nut 23. Nut 30 ing confined betweenthis shoulder and the under 23 serves to clamp stop plate 23 against the shoul side of lever 42. A circular depression 33 is der 22. The force exerted by spring I3 against formed in the lever to accommodate and guide stop plate 23 is such as to urge plug II firmly to spring 35. This depression 63 is formed by press ing the material of lever 42 upwardly to form its seat, so that a substantial force is required to rotate the plug from closed to open position, boss 31. Above lever 42, rod 32 is provided with an enlarged portion 33, forming a shoulder 33 or vice versa, and to seal the plug. `immediately above boss 31. The upper end 10 The angular movement of plug II is limited to of enlarged portion 33 is coned, cooperating with 90° as shown most clearly in Figs. 1 and 3. Thus, the boss 9 on body I0 has upwardly extending a counterbored portion 1I of the bore 12 carrying lugs 24 and 25, forming abutments for the op 40 push rod 32, to form a seal when the rod 32 is in positely extending arms 23 and 21 on plate 20. its upper or normal position. This serves to nre vent escape of fuel from chamber 55 along rod The means for rotating plug II will be described 32. Encircling the upper portion of rod 32 is a later. compression spring 15, accommodated in a coun Within the body I3 and surrounding the lower end of tapered seat I2, a raised annular valve seat 45 terbore 13 of bore 12. This spring is confined between a shoulder 11 formed on rod 32 as by a 33 is formed, this seat being concentric with the washer 13 and the bottom of counterbore 13. A tapered plug seat I2. A closure structure 3| is packing washer 13 oi' suitable'material such as provided to cooperate with the raised seat 33. felt is interposed between the end of spring 15 This structure 3| includes a valve closure member 32 adapted to cooperate with the valve seat 33 50 and the bottom of counterbore 13 to prevent es cape of fuel between rod 32 and its supporting and made of some suitable yielding material, bore 12, when rod 32 is depressed. such as "neoprene" Closure member 32 is sup As clearly shown in Figs. '1 and 8, lever 42 is ported on a stem 33 by means of a relatively stiff provided with a forked end 32, the forks of which backing plate 34, which may be of metal. 'I'he upper portion 35 of stem 33 is of reduced diam 55 enter into groove 4I on stem 33. The opposite eter forming a shoulder 33 for supporting plate end 33 is also forked so as to be accommodated 34 and threaded for the reception of a nut 31. Nut 31 serves to clamp plate 34 on shoulder 33, a large diameter washer 33 of metal or other stiff in a groove 84 formed in a threaded plug 35 sup ported in a wall of body I3. The arrangement is such that depression of rod 32 against the force material being interposed between the nut 31 and 60 of spring 15 will cause shoulder4 53 to contact the “neoprene” closure member 32. boss 31, swinging lever 42 downwardly about the Stem 33 has axially spaced hexagonal portions, shoulder 204 of plug 35 as a fulcrum, and mov 39 and 40, of larger size immediately below the ing valve structure 3l downwardly and away threaded end portion 35 and defining a groove 4I from seat 30. l ~ for the reception of an operating arm or lever 42. 65 The position of the fulcrum for lever 42 may The lower end of body I0 is closed by a member be altered to secure proper operation of the valve 43 formed of upper and lower plates 41 and 43, 3i, by adjusting the threaded plug 35 in the body. each provided with an opening 43 and 53 to ac After adjustment it is sweated in place, to hold commodate stem 33. 'I‘he upper plate 41 has a it in adjusted position as well as prevent leakage. circular upset portion or hollow boss 5I for the 70 It is desirable to prevent rotation of member reception of packing 52. This packing may be 32 with respect to seat 30. In this way, any tend felt or other suitable material. -’I‘his boss 5I also ency for the member 32 to wear by friction on serves to space openings 49, 50 apart so as to bet the seat 33 is eliminated. For preventing this ter serve as a guide for stem 33. The arrange rotation the forked end 32 of lever 42 has down ment is such that the valve closure structure 3l 75 turned lugs or cheeks 33 (Figs. 7 and 8) ar asoaen 5 so feras to force ball III entirely of! cam ||1 are ranged to engage opposite faces of the hexagonal provided and will be described shortly. Hence, portion 40 of stemßl. when the turning force on cap ||0 is released, Provisions are made for maintaining valve A3| open against the torce of spring 16 as well as against the pressure of the fluid in chamber 80. For this purpose use is made of an electromag net 90 supported .in a housing 9|. This housing 9| which may be of light sheet metal is secured over the lower end of body I0 in any convenient manner as by screws 92. A gasket 93 is inter posed between the housing 9| and the body I0 to prevent escape of fuel. Housing 9| andgasket 93 cooperate to hold closure member 48 in place on body | 0. Housing 9| has a depression 95 for receiving the horizontal portion 98 of the U shaped core 91 of electromagnet 90. This serves to position the core 91 along the axis of the valve spring 18 forces rod 8Ltogether with ball ||9 upwardly until the conical closure 10 in rod 82 engages seat 1|. This upward movement of ball ||9 causes cap ||0 to move in the direction op posite ,to that indicated by arrow |20. It will be noted :that ca ||0, plug' || and valveA closure structure '3| w th its seat 30 are disposed in co axial relationship, thus making a very compact - structure. The parts are so proportioned that movement of cap ||0 in the direction of arrow |20 to the limit provided, will urge the valve structure down wardly a suillcient distance to bring armature |03 - into contact with the faces of poles 99 of magnet 90. If magnet 90 is energized, upon release of cap structure. For accurately positioning core 91 ||0, rod 82 will be moved upwardly by spring 15 transversely of the valve structure, use is made of a light sheet metal stamping 99, or similar mem 20 as just described, but valve 3| will be retained in >its lower position by magnet 90; spring 65 is ber formed in any other desired manner havingthereby compressed and has insufficient strength openings to receive the legs 99 of core 91. Mem to overcome the magnetic force of magnet 90 upon ber 98 is secured in position by having out turned armature |03. All parts will then be as shown lugs |00 engaged under gasket 93. A substan tially complete enclosure, separate from the valve 25 in Fig. 2. If, however, magnet 9_0 is not ener gized, valve 3| will move upwardly to closed po passages, is thus secured for the electromagnet sition along with rod 62 by virtue of the force of core and its coil |25; and stamping 98 closely spring 15. Similarly if at any subsequent time confines this coil in the space formed in the magnet 90 is deenergized, valve 3| will immedi housing 9 I. ' Cooperating with electromagnet 90 is an arma 30 ately be closed by spring 65. Electro-magnet 90 is arranged to be energized ture |03 of disc form, carried by the lower end of by electric current generated by a thermocouple stem 33. Stem 33 has a short neck |04 of re generator |26 (Fig. l) supported by the aid of a duced diameter at its lower end. Armature |03 pilot burner structure |21 so as to be heated by has a countersunk hole |05 for the reception of the flame |28 thereof. neck |04.v This neck is riveted over as indicated The pilot burner |21 may be supplied with fuel at |08, to loosely hold armature |03 on stem 33. as through a pipe |29, connected to a port |30 Armature |03 is thus free to rock on stem 33, and leading into the valve body I0 just above seat 30 accordingly is free to accurately accommodate (see Figs. .2 and 4). Accordingly wh‘en the auto itself to the faces of poles 99, without the need of careful alinement of magnet core 91 with re 40 spect to the axis of stem 33. This is an important feature since it enables a minute magnetic force exerted by magnet 90 to retain valve closure 3| in open position, when the closure has once been moved downwardly so as to bring armature |03 into contact with magnet poles 99. . The means for opening the safety valve 4 will now be described. A cap | I0 having oppositely extending wings | || (Figs. 3 and 4) for conven ience in operating is rotatably mounted on the upper end of body I0.` The cap is radially as well as axially supported on the exterior of cylindrical matic shut-oil’ valve 3| is closed or seated the passage of fuel to pilot burner |21 is interrupted. The arrangement is such that when pilot flame |20 is extinguished, electromagnet 90 v releases armature |03, and spring 65 assisted by the flow if) of the fuel past seat 30 moves valve 3| to seat 30, stopping the now of fuel between inlet and out let chambers 55 and 56. ` It is essential that` the passage of fuel to the main burner be prevented during the operation of lighting the pilot burner. Accordingly the valve structure is arranged> so that the main cock 3 must be in closed position before the automatic boss 9 as by a ball bearing arranged in a conven shut oil’ valve 4 can be opened or reset. For this tional manner and including balls | |2, inner race purpose, cap ||0 is arranged to operate plug || of cock 3 through a lost motion connection, and it is during the lost motion that the safety valve is operated. This is accomplished by the mecha ||3 on boss 9 and outer race ||4 in a skirt-like portion ||5. This skirt ||5 has an arcuate space ||8 (Figs. 4 and 5), formed therein„terminating in an inclined or cam surface ||1. Supported on stem 82 within bore 16 is a ball H8, the parts being so proportioned that in normal position, with the stem or rod 62 in its uppermost posi tion, ball ||8 extends a substantial distance into space ||6, but clears the top surface ||9 of this space by a suitable distance. Thus, a movement of cap ||0 in the direction of arrow |20 (Figs. 4 and 5) will cause cam surface | |1 to contact ball ||8 and force it downwardly, within bore 18. The bore serves to prevent the ball moving laterally. This downward movement of ball ||0 forces push rod 62 downwardly against the pres sure of spring 15 and causes shoulder 89 to en gage boss 61 on lever 42, swinging lever 42 down wardly about a point on the surfaces forming groove 04 in plug 85, and lowering valve 3| from seat 30. Means to prevent cap ||0 from turning nism now to be described. Rotation of cap | I0 is caused to exert a turning force upon plug ||, by operation upon the arms 28 and 21 attached to the plug. Thus, referring to Figs. l and 3, the outer ends -of arms 26 and 21 are accommodated in arcuate slots |3| and |32 formed in cap ||0. With the parts as shown ' port |3 of plug || is at 90° from port |4 and fur-_ - ther movement of plug | | in a counter clockwise direction is prevented by the engagement of arms 26 and 21 with stops 24 and 2-5 respectively. However, further movement in a counterclockwlse di rection o_f cap ||0 is possible due to slots |3| and |32, this movement being restricted to an amount necessary to depress rod 62 so as to bring valve 3| downward until armature |03 engages magnet 90. This movement is not sufficient to permit ball | I8 to be forced entirely out of cap ||0. Cap ||0 . 2,403,611 , 7 I may be turned freely in a clockwise direction until the ends of slots I3| and |32 engage arms 23 and 21 respectively., when further movement of the cap ||0 will rotate plug ||. This rotation of plug || is limited by arms 26; 21 and stops 24 and 25 to 90° which alines ports I3 and I4. Figure 9 diagrammatically illustrates the steps incident to resetting the automatic shut-on valve tion |52 are enclosed in aníetal jacket or sheath |53, of suitable material such as stainless steel'. Jacket |53 is secured in one end 1of a tube |54, which may be of copper, for housing the con ‘ ductors 'to be laterV described. ’I'he other end of tube |54 is joined to the magnet housing 9| in a gas tight manner, as by being inserted in a boss |55 on housing 9|. In this manner, any gas or 4 and opening the main cock 3. The several ra fuel which may leak past stem 33 into housing 9| dial lines of this ligure correspond to various po 10 is prevented from escaping, since tube |54 and sitions of the plane passing through the axis and Jacket |53 are gas tight. ~ . wings III of cap ||0. The cap ||0 is iirst'moved 'I‘ube |54 is supported by the base |56 of pilot counterclockwise as far as possible, which opens burner |21, which base may be in'turn supported the safety valve 4 and corresponds in position to by the main burner (not shown) in accordance line |35. 'I‘his provides fuel for the pilot burner 15 with usual practice. Thus, base |56 has an aper |21 which is lighted, passage of fuel- to the main ture |51 through which tube |54 extends, snugly burner being still interrupted by plug I1. After fitting therein. The lower portion of aperture a brief interval to allow the thermocouple |23 to |51 is threaded for the reception of a threaded become active, cap || 0 is turned clockwise. As sleeve |56, closely fitting over tube |54. A collar it reaches the position indicated by broken line 20 |60 of deformable material tapering from the~ |36, the stem 62 is released and moves to the posi center toward each end is disposed in the space tion of Fig. 2. If magnet 30 is energized, the between sleeve |58 and the end of aperture |51. safety valve stays open, as shown. If, however, The end of the aperture |51 as well as of the the magnet 90 is not energized for any reason, aperture in sleeve ' |56 is slightly countersunk such as failure to light the pilot burner, valve 4 25 to receive the adjacent end of collar |60. As the will at once close. Continued movement of cap sleeve |58 is screwed in against collar |60, the ||0 in a clockwise direction will ñrst cause the ends of the collar are Vcompressed inwardly lost motion between arms 26, 21 and slots |3|, |32 against tube |54, securely holding it in place. to be taken up, as indicated by radial line |31. Conductors |5| and |50 are formed of dis After this motion is taken up. plug I I of the main 30 similar metals or alloys capable of withstanding cock 3 will be turned, bringing ports I3 and |4 the temperature to which they will be subjected. into communication at about line |38 and into Such alloys, for example, are Chromel and Copel full register at line |33. Obviously, if pilot burn respectively. Since Copel is relatively inexpen er |21 is lighted the main burner will now be sive, and to simplify the construction of the ther lighted. But if the pilot burner |21 is not lighted 35 mocouple, one of the conductors as for example or becomes extinguished, the automatic valve 4 element |50 is formed of a continuous piece of 'remains closed or closes and takes control of the 4Copel wire of a suitable gage and appropriately main burner away from cock- 3. It will also be insulated, as by a very thin coating of enamel. obvious that opening or resetting of valve 4 is only This Copel wire | 50 extends from junction |52 possible while the main cock 3 is closed. It is 40 into housing 9|, where it is joined to one lead of thus possible to light the pilot in perfect safety. coil |25 of electromagnet 90. Since Copel has a 'I'he main burner can be controlled as desired resistance not so great as that of Chromel, there by cock 3 as long as the pilot is burning. Thus, is no intolerable power loss through this conduc as diagrammatically shown in Fig. 10, with the tor. The conductors |50 and |5| may be quite plug valve fully open, cap I I0 is turned counter 45 tightly engaged in sheath I 53. The bare con clockwise, taking up the lost motion between arms ductors I5| and |6| are thereby grounded to the' 26, 21 and slots |3I, |32 as indicated by line |4|, sheath', but this of course is not effective to cause and turning plug || to bring ports I3 and I4 out short circuiting, in view of the thin layer of in of communication as indicated by line |42 and sulation on the other conductor |50. 'I‘he other fully closing the plug valve when line |43 is 50 conductor |5| is formed of Chromel, and is re1 reached. This position corresponds with that of atively short, being joined to a copper conductor line |36 of Fig. 9 and the plug valve or cocka |6| as by fusion or welding at junction |62. The may be turned from the opened position of line Chromel conductor |5| has a thermoelectric |42 to closed position of line |42, or vice versa characteristic quite similar to that of the copper as’ desired. 55 lead |6|. This lead |6| extends through tube If the pilot ñame |28 becomes extinguished, | 54 and is Joined to the other terminal of coil and it is desired to reset the automatic shut-off |25. Since the conductor |50 is insulated for its valve 4, the plug valve is turned counterclockwise entire length, the conductor |5I, its associated through the closed position indicated by line |43 lead |6| and the cold junction |62 can be left (Fig. l0) to a position indicated by line |44. This 60 Without insulation. ' corresponds to position |35 of Fig. 9 in which the Due to the small mass of the conductors form automatic shut-off valve is opened as described in ing the thermocouple structure, there is little connection with that figure. ' delay, after the pilot ñame |23 is extinguished, Due to the fact that armature |03 is mechani in equalizing the temperatures, and the genera cally moved into contact with poles 99 of magnet 65 tion of power stopped, resulting in a rapid closure 00, it is possible to control the automatic valve of the safety valve. y 3| with very small electrical power such as one or two milliwatts. This required low power per mits the use of a very simple thermocouple |26. Referring to Fig. 1. it will be seen that the thermocouple structure |26 employs a single hot junction and that the thermocouple elements |50, Furthermore, the temperature differential from the hot junction |52 to the cold junction formed at the end of the conductor |50 Where it joins the electromagnet is quite large, and there is a con sequent improvement in the amount of power generated. The thermocouple structure illustrated herein is described and claimed in an application Serial |5| are joined as by being fused together at their upper ends |52 to form this hot junction. The elements |50 and |5I, as well as the fused junc 75 No. 503,791, ñled September 25, 1943, in the name 2,409,011 l . \ 9 . v l l l of William A. Ray, and entitled: “Thermocouple 'rod |9| with valve |86; Ipthis case, however, ’ structure." When there are individual burner units of a multi-unit furnace to be controlled separately, a push rod |9| is heldin its lower position> when valve |86 is maintained open (as by the previous» ly described electromagnetic means 90),' by a pin 20|, which ‘connues lever 200 against a shoulder slightly modified form of valve'is used. The fea tures wherein the valve which differs from that just described are illustrated in Figs. li‘and 12, while Fig. 13 illustrates diagrammatically a multi unit furnace system, in which the valve is in corporated. The furnace is generally indicated by |18, and 202 ongrod |9|, suitable clearance being provided. A compression spring 203 is confined b'etween shoulder 40 on valve stem 33 and boss 6| on clo ` sure member 46, to'assist in urging valve- |38 to its seat 30 when released by magnet 90. When valve |86 is to be reset, valve |81 is as shown includes four substantially identical units each heated by a burner |16, having a pilot ~ opened through the channel |98, and allows fuel to pass to pilot burner |11, which' when lighted> burner |11, serving to heat a controlling thermo couple |18. It is to be understood that the fur matic valve |86 as well as valve |81 open. Cock energizes thermocouple |16 and holds the auto nace |18 is used for heating a single space, such |86.may-then~ be utilized to control burner |16. as a large auditorium, and is controlled as a unit in any preferred manner, as for example by a - subject however to the master valve |8I. If the pilot flame is extinguished, the automatic valve ‘ thermostat shown diagrammatically at |19, or by |86 as well as valve |61 both close; thus no fuel can pass tovthat unit of the furnace |10 under a. time or manual switch. A source of current, such as a. step down transformer is indicated at |80, by means of which switch |19_operates an electromagnetically actuated master valve |8|. Valve |81 controls the passage of fuel from consideration, nor to its pilot. This is particu larly important in using a fuel which is heavier than air, for `example butane, since if such fuel is allowed to escape through the extinguished a suitable source (not shown) through a conduit 25 pilot burner, it gathers-in the low areas in and |82 having branches |83 leading respectively to about the furnace, and forms a, dangerous ex each of burners |16. Each branch |83 has a reset plosive mixture. v valve |84 interposed therein, including a main What is claimed is: cock |85 (Fig. 12) and an automatic shut-off 1. In a fuel valve structure, a rotary plug, a |88 which operates to control the passage of fuel 30 valve body forming a seat in which said plug is to the associated burner in exactly the same man accommodated, said plug being operable to con ner as cock 3 and shut-off valve 4 of valve struc trol the passage of fuel by way of the plug, said ture l, in the first described form of the inven-f’ plug having for that purpose a passageway open tion. The valves |84 enable one or more units of ing in one end of the plug, said body adjacent the furnace |15 to be rendered inactive, thus im 35 the end of said passageway having means form proving the adaptability and flexibility of the sys ing a safety valve seat, a .safety valve closure tem to different operating conditions. adapted to cooperate with said safety valve seat It is obviously essential that the pilot lights | 11 and movable toward and away from the seat, a be supplied with fuel even when the master valve lever capable of being'actuated to move said |8| has been closed by switch |19. Accordingly, 40 safety valve closure, means for retaining said the supply of fuel for the pilot burners is taken closure in open position, means for operating the out from pipe |82 at some point between valve rotary plug, and means whereby said operating |8| and the source of supply, as via connections means may be moved while the rotary plug re |91, |98. Thus the fuel for each pilot |11 is sup mains in closed position, for actuating the lever plied independently of the supply of fuel in~ 45 to open the safety valve. ' branch pipes |83; and arrangements are made 2. In a fuel valve structure, a 'rotary plug, a whereby the fuel supply to each of the pilots |11 valve body forming a seat in which said plug is is controllable independently of the other pilots. accommodated, said plug being operable to con trol the passage of fuel by way of the plug, said For this reason, the reset valves |84 each have supplemental valve means generally indicated by 50 plug having for that purpose a passageway open |81 (Fig. 11) for controlling the fuel supply for the associated pilot burner |11, port |30 and the connection |29 therefrom being omitted. ' ing in one end of the plus'.> said body adjacent the end of said passageway having means form ing a safety valve seat, a safety valve closure Referring to Figs. 11 and 12, valve |84 has a adapted to cooperate with’said safety valve seat body |90 similar to body |0 of the first form 55 and movable toward and ‘~ away from the seat, a lever capable of being actuated to move said of valve described, within which the plug cock |85 is arranged to be rotated by the winged cap safety valve closure, means for retaining said closure in open position, a -rotary actuator for H0, all as before. Push rod or stem |9| is actu-` ated to unseat the automatic shut-off valve |86 the plug and coaxial therewith, said actuator by the cam surface ||1 in the cap. In this form, having a lost motion connection with the plug, the push rod |9| additionally functions as a valve and means operable during the lost motion, for actuating the lever to open the safety valve. control for the pilot |11. Thus bore |92 in which the rod |9| slides is intersected by 'alined ports 3. In a fuel valve structure, a, rotary plug, a valve body forming a seat in which said plug is |93 and |94, one of which, for example.|94 is connected to the associated pilot burner |11 by 65 accommodated, said plug being operable to con trol the passage of fuel by way of the plug, said a conduit |95. The other port, |93, is connected plug having for that purpose‘a passageway open to the fuel supply line |82 by conduit |86, |91. ing in one end of the plug, said body adjacent Push rod |9| is encircled by an annular groove ’ the end of said passageway having means form |98 which is adapted to establish communication between ports |93~and |94 only when the push 70 ing a safety valve seat, a safety valve closure adapted to cooperate with said safety valve seat rod |9| is depressed to unseat valve |88. For this reason it is necessary that rod |9| be main and movable toward and away from the seat, a lever capable of being actuated to move said tained in its lower position as long as valve |88 safety valve closure, means for retaining said is open. Thus an operating lever 200 similar to lever 42 is provided for operatively connectingv 75 closure in open position,l a rotary actuator for 2,403,611 12 the'plug and coaxial therewith, said actuator hav ing a lost-motion connection with the plug, and means operable during the lost motion, for actu ating the lever to open the safety valve, compris ing a cam carried by the actuator, and a push rod operating on the lever and adapted to be moved by the cam. 4. In a fuel valve structure, a rotary plug, ay valve body forming a seat in which said'plug is accommodated, said plug being operable to con trol the passage of fuel by way of the plug, said adjacent the open end of the plug, a valve mem- ber cooperating with said seat, means for rotat ing the plug to cause said radial port to cooper ate with the port in said seat or to interrupt com municationk between the last mentioned ports, and means actuated by the means for rotating the plug for unseating the valve member when the said -communication is interrupted. y 9. In reset valve. a plug cock, a valve for con plug having for that purpose a passageway open trolling the- passage of fluid through the plug cock, and a rotatable cap, said cock, valve, and cap being arranged in coaxial relationship, means ing in one end of the plug,- said body adjacent including a lost motion connection whereby rota the end of said passageway having means form ing a safety valve seat surrounding said end, a tion of the capV serves to rotate the plug from open to closed position, and means whereby rotation of the cap after closing the plug cock unseats the valve. safety valve closure adapted to cooperate with \ said safety valve seat and movable toward and away from the seat, and a common rotary means for causing operation of the plug and the safety valve closure by angular movement of said com mon means about the axis of the plug. 5. In a fuel valve structure, a rotary plug, a valve vbody forming a seat in which said plug is accommodated, said plug being operable to con trol the passage of fuel by way of the plug, said plug having for that purpose a passageway open 10. In a reset valve, a main cock, and a valve for controlling the passage of fluid through the main cock, means for opening and closing said cock, means for opening the valve, comprising a pivotally supported lever and a push rod, means to depress the push rod, a shoulder on the push rod adapted to engage said lever and move it about its support when the rod is depressed to unseat the valve, means to return the push rod ing in one end of the plug, said body adjacent to its initial position, and means energized by the the end of said passageway having means form return of the push rod to its said initial position ing a safety valve seat, a safety valve closure for seating the valve when the valveis released. adapted to cooperate with said safety valve seat 30 11. In a reset valve, a main valve, and an auto and movable toward and away from the seat, said matic shut-oil.’ valve for controlling the passage closure including a non-circular stern, and means of fluid through the main valve, said valves hav for moving said safety valve closure, said means ing a common axis, a housing for supporting and engaging said stem to restrain said closure against enclosing said valve's, a cap rotatably supported rotation. 35 on the housing coaxially with the valves, said 6. In a fuel valve structure for controlling the main valve having a closure> member arranged flow of fuel to a main burner and a pilot burner, for operation by rotation of said cap, means form means forming a safety valve seat, a movable ing a lost motion connection between said cap closure for the seat, means including an axially and said closure member, a push rod arranged to movable rod for operating said closure, and a 40 open said shut-off valve upon movement in an guide for the rod, said guide and rod being ar axial direction, said push rod being spaced from ranged to provide alined passages only when the said axis, means including a cam surface on said closure is moved oil' its seat, to form a valve for cap whereby rotation of the cap causes said rod to move in an axial direction, and means forming an the supply of fuel to the pilot burner. l 7. In a reset valve, a tapered rotary plug hav 45 operating connection between the push rod and ing a radial port as well as an axial port in com the shut-oil’ valve. munication therewith, said axial port having an 12. I_n a fuel supply system having a main fuel opening at one end of the plug, a body having valve, as well as arr' automatic shut-oil’ valve, a bore forming a tapered seat for the plug and for controlling the passage of fuel to a burner, having a port adapted to cooperate with said 50 the shut-oil valve when closed preventing the radial port, said bore extending beyond the plug, ` passage of fuel through the main valve. said shut an annular seat surrounding the end of the bore adjacent the open end of the plug, a valve mem ber cooperating with said seat, means for rotat ing the plug, and means operated by rotary move oil‘ valve having a mechanical reset for tem porarily opening the shut-olf valve, a housing for supporting and enclosing said valves, said main 55 valve having a closure member movable through ment of the means for rotating the plug, for un apdistance for opening and closing the main valve, seating the valve member. 8. In a reset valve, a tapered rotary plug having means for moving said closure between its open Í and closed positions, and mechanism operated by a radial port as well as an axial port in com said means at the end of the closing movement munication therewith, said axial port having an 60 of the closure for opening the shut-off valve, opening at one end of the plug, a body having comprising a lever pivotally supported in said a bore forming a tapered seat for the plug and housing, a push rod adapted to operate said having a port adapted to cooperate with said lever, and a cam surface carried by said means radial port, said bore extending beyond the plug, an annular seat surrounding the end of the bore 'for operating the push rod. WILLIAM A. RAY.