US2855955A

US2855955A - Gas valves

Info

Publication number: US2855955A
Application number: US483333A
Authority: US
Inventors: Charles C Lamar
Original assignee: Harper Wyman Co
Current assignee: Harper Wyman Co
Priority date: 1955-01-21
Filing date: 1955-01-21
Publication date: 1958-10-14
Anticipated expiration: 1975-10-14

Description

oct. 14, 1958 Q LAMAR4 v 2,855,955

Gixs VALVES Filed Jan. 21, 1955 3 Sheets-Sheet l SMMER 'INVENTOR- .QZQQS a l .(FULL 0N) LOW E /N TE @MED/A TE TURA/DOWN ,FATE/ 5.7.0. PE2 Hoa@ ou; 14, 195sl Filed Jan'. 21, 1955 sooo jaaa

c. C. LAMAR GAS VALVES 5 Sheecs-Sheei'l 2 agg;

c. 'ci LAMAR GAS VALVES 3 Sheets-Sheet 3 INVENTOR. Charles Clam?? 'L S/NHER ONLY lav/@WMM 1 v. l u

Filed Jan. 2 1, 1955 GAS VALVES Charles C. Lamar, Chicago, Ill., assignor, by lmesue assignments, to Harper-Wyman Company, Chicago, El., a corporation of Illinois Application January 21, 1955, Serial No. 483,333

12 Claims. (Cl. IS7-599.2)

The present invention relates to gas valves and particularly to so-called double gas valves, i. e., valves used with gas burners each having two burner sections and wherein the double valve controls theA supply of gas to both sections. Burners of this type are called double burners and o-ne of the burner sections is generally called the main burner and the other the simmer burner.

The present invention is an improvement over gas valves of the character disclosed and claimed in the copending applications of Charles C. Lamar, Serial No. 277,219, now Patent No. 2,770,253, granted November 13, 1956, Charles C. Lamar et al., Serial No. 449,042, and Charles C. Lamar et al., Serial No. 449,043. These applications disclose double gas valves providing a num ber of desirable operating characteristics and which can be constructed simply and economically. The present invention is directed particularly to a new and improved double valve having additional operative positions including one in which a predetermined minimum quantity of gas is supplied tothe main burner section while gas is supplied also to the simmer burner section, and, furthermore, a valve providing uniform turndown of the main burner section to the minimum value while supplying suicient gas to the simmer burner section to provide sucient heat and desired heat distribution for certain cooking operations and maintaining a minimum stable ame on both burner sections.

A further object of the present invention is to provide a double gas valve having the advantages set forth above and also one providing a uniform turndown of the simmer burner section with the main burner section, which is accomplished, preferably, by interconnecting the outlets, preferably through the valve plug, and simultaneously decreasing the flow of gas through both outlets by simultaneously decreasing the gas pressure at the interconnected outlets.

In the past, double gas valves have been operable into a plurality of operative positions from an olf position. Among these have been (l) a full on position in which the gas is supplied at a maximum rate to both the main and simmer burner sections, (2) a full simmer only position wherein gas is supplied at a maximum rate to the simmer burner section only, and (3) a low simmer position wherein a predetermined small quantity of gas is supplied to the simmer burner only. The valves also provide what are called turndown ranges Where controllable or decreasing quantities of gas can be supplied to both burner sections or to the simmer burner section only as the valve plug is turned tow-ard off from the full on or the full simmer position or increasing quantities when the valve plug is turned in the opposite direction from the simmer to the full on position.

The gas valve of the present invention is provided with a further operative position. This is one in which a predetermined minimum quantity of gas is supplied to the main burner and in which a predetermined minimum quantity of gas is at the same time supplied to the States aten lrice simmer burner section. Furthermore, the turndown range between the full on and full simmer postions is such that both Vthe main burner and the simmer burner sections are interconnected and throttled at the same time thereby to provide a substantially simultaneous and uniform turndown of both sections. This is decidedly advantageous in certain cooking operations as in frying and the like, especially when thinewalled cooking vessels are used. With heavier cooking vessels this Tis not so important because of the heat distribution afforded by the vessel itself. The valve of .the-present invention provides a .low fry position v'as vwell as a uniformly regulatable frying range.

In brief, the valve of the present invention includes a valve body having a valve chamber which maybe tapered for the reception of a rotatable tapered valve plug. The valve body is provided 'with a gas inlet passageway and a main burner outlet passageway including a radial portion which may be copla'n'ar with 'the inlet passageway but angularly spaced from it. Both the inlet and outlet passageways communicate with the chamber in the region of the plug. The valve body has also a rst outlet passageway which may be considered to be a low simmer outlet passageway including an orice defining structure, either fixed or variable, for predetermining the minimum tlow of gas to the simmer burner only in the socalled low simmer position. The valve body includes also a full or primary simmer outlet passageway which is angularly spaced from the inlet and main burner outlet passageways 'and may be axially spaced from them. Finally, the valve body includes an auxiliary simmer burner outlet passageway through which the simmer burner is supplied with gas in the so-called turndown range in which the flow of gas to the main and simmer burners is regulatable. The valve plug has an -axial passageway which is preferably continuously in communication with the low simmer outlet passage-l way. This communication can readily be provided as by constructing `the axial passageway so that it opens into the plug receiving chamber and by having the low simmer passageway in continuous communication with the chamber and thus the open end of the axial passage'- way in the valve plug. The Valve plug has also a first pair of transverse or radial passageways extending from' the axial passageway therein to the exterior of the valve plug and which are constructed and arranged to be aligned with the inlet and main burner outlet passageways in a full on position. The valve plug has a third passageway which is coplanar With the primary simmer burner outlet passageway and aligned with the latter in the full on position. The plug has a fourth passageway coplanar with the third one but angularly spaced from it and disposed so as to be aligned with the primary simmer burner outlet passageway in the full simmer position of the valve plug.

Further, and in accordance with the present invention, the valve body has a pair yof auxiliary outlet passagewaysconnected to the main and simmer burner outlet passageways.v These passageways are interconnected preferably through auxiliary passageways in the plug and supplied with a regulatable quantity of gas and are so arranged with respect to passageways in the valve plug that the same variable gas pressure is applied to both the main and simmer burner outletpassageways during operation in the turndown 'range in which regulatable quantities of gas are supplied to both burner sections. This insures uniform turndown of both sections and in a simple and effective manner. The passageways also areconstructed and arranged so that .a predetermined minimum flow of gas is insured to the main burner section as well as to the simmer at the end of the turndown range to pro vide what may be called a low fry position. The predetermined minimum flow to the simmer outlet passageway only is maintained in going from the low fry position into the full simmer position so as to avoid too low a turndown or a are-up of the simmer burner section.

Other objects and advantages of the present invention will become apparent from the ensuing description of an illustrative embodiment thereof, in the course of which reference is had to the accompanying drawings, in which:

Fig. l is an enlarged partial cross sectional view of a valve constructed in accordance with the present invention, the valve being shown in its turndown range;

Fig. 2 is a transverse cross sectional view taken along the line 2 2 of Fig. 1, but illustrating the valve in its so-called full on or full main and simmer position wherein full quantities of gas are supplied to both the main and simmer burner sections;

Fig. 2a is a conical layout of the plug chamber and plug with the valve in its full on position;

Fig. 2b is a similar conical layout with the valve in the turndown-of-both range and before reaching the socalled low fry position;

Figs. 3 and 3a are transverse cross sectional and conical layout views, respectively, of the valve at the low end of its turndown-of-both range and wherein a small quantity of gas is being supplied to both the main and simmer burner sections;

Fig. 3b is a conical layout with the valve in the socalled low fry position;

Figs. 4 and 4a are transverse cross sectional and conical layout views, respectively, of the valve in its full simmer only position;

Figs. 5 and 5a are transverse cross sectional and conical layout views, respectively, of the valve in its low simmer only position;

Figs. 6 and 6a are transverse cross sectional and conical layout views, respectively, of the valve in its olf position;

Figs. 7 and 8 are bottom plan views of the valve plug (with the auxiliary valve omitted) in the positions of Figs. 2 and 4, respectively; and

Fig. 9 is a ow diagram indicating approximately the gas flow in the various angular positions of the valve plug.

Referring now to the drawings and first to Figs. 1 and 2, the double gas valve of the present invention is indicated as a whole by reference character 30. It comprises a valve body 32 having a chamber 34 with a conical inner surface 36 within which `is mounted a movable control member 38 illustrated as a rotatable tapered or conical valve plug.

Gas is supplied to the valve from any suitable source such as a gas manifold 40 shown only fragmentarily in Fig. 2. The valve body is provided with a gas inlet passageway 1 formed in a downwardly extending externally threaded boss 42 utilized in securing the valve to the manifold. The body is also provided with generally radial

outlet passageway portions

2 and 3 opening into chamber 34 and through which gas is supplied to the main and simmer burners, respectively. Passageway 2 communicates with an axially extending main burner outlet passageway portion 44 formed in the valve body at one side of chamber 34 and terminating in an externally threaded boss 46 to which is secured an adjustable hood 48 which predetermines the maximum quantity of gas supplied to the main burner section of the double burner, not shown, in the full on position of the valve in a manner well known to those skilled in the art. Hereafter, for the purpose of convenience, the passageway 2 will generally be referred to as the main burner outlet passageway. The passageway 3, which will be considered to be the primary simmer burner outlet passageway, communicates with a generally axially extending simmer outlet passageway portion 50 in the valve body vat the side opposite passageway 44 butin the same (horizontal) plane so that the inlet passageway 1 is substantially

intermediate passageways

2 and 3. The passageway S0, in turn, cornmunicates with a further simmer outlet passageway 52 formed in an externally threaded boss 54 at the end of which is mounted an adjustable hood 56 which predetermines the maximum quantity of gas supplied to the simmer burner section (not shown) in both the full on and full simmer positions. All of the passageways mentioned can readily be formed by drilling the valve body. The

passageways

2 and 3 can be drilled from the outside of the valve body after which the outer ends can readily be closed, as by the plugs 58. These passageways and the inlet passageway 1 can also be drilled at the same time as the hereinafter referred to

passageways

11, 12 and 13 in the valve plug.

The valve plug is provided with an axially extending passageway 10 and with four transverse or

radial passageways

11, 12, 13 and 14, of which, as best illustrated in Figs. 2 and 2a, the

passageways

11, 12 and 13 are aligned with the

passageways

1, 2 and 3 in the valve body in the full on position of the valve plug. The

passageways

1, 2, 11 and 12 may be coplanar.

Passageways

3, 13 and 14 are coplanar and axially spaced from at least the inlet passageway 1 so that there can be no registry thereof with the inlet passageway. Also, passageway 14 registers with the passageway 3 in the full simmer position in which position passageway 12 in the plug may register with the inlet passageway 1 in the valve body, as will be described in greater detail herein after. In the specific valve shown,

passageways

1, 2, 11 and 12 are coplanar as are

passageways

3, 13 and 14.

Passageways

1 and 11 have a diameter of .228 inch, 2 and 12 a diameter of .1935 inch, 3 and 13 a diameter of .109 inch, and 14 a diameter of .093 inch.

Passageways

2, 12 and 3 and 13, in the full main and simmer position, are coplanar in a horizontal plane and

passageways

1 and 11 are in a vertical plane, i. e., at the bottom of the body and plug with their axes displaced .0135 inch to the left (as viewed in Fig. 2) of the center line of the valve and axis of the valve plug. The plug has a length of 1%; inch, a taper of 2 inches per foot and a diameter of .361 inch at its smaller diameter end.

Passageways

13 and 14 have their axes .242 inch from the smaller end of the plug and

passageways

11 and 12, 3/8 inch from the larger diameter end. Passageway 14 is in a transverse plane coplanar with passageway 13 and angularly it is somewhat more than from it.

The valve body includes also a low simmer outlet passageway 60, see Fig. 1, through which a predetermined low quantity of gas is supplied to the simmer burner section. The quantity of gas may be predetermined by suitable means, such as the cup with a xed orice 62 mounted within the passage. However, it should be understood that adjustable ow restricting means may be utilized. The passageway 60 provides communication between the plug receiving chamber 34 and the simmer burner outlet passageway 52. The low simmer passageway thus may be seen effectively continuously to connect the simmer burner outlet passageway with the axial passageway 10 in the valve plug.

The valve, further in accordance with the present invention, is constructed and arranged in a novel manner to provide uniform turndown of the simmer section of the burner with the main section and by means maintaining the same regulated variable pressure in the simmer and main burner outlet passageways'. This is accomplished by a construction in which the two outlet passageways are interconnected in the turndown range so as to be supplied with gas at the same variable pressure as regulated by the valve plug. The construction includes an auxiliary main burner passageway 5 leading from the outlet passageway 2 into the valve chamber at a point axially spaced toward the outer end of the valve from the inlet and outlet passageways in the body and the associated

passageways

11 and 12 in the valve plug. It includes also an auxiliary simmer burner outlet passageway 6 in the valve body connected by an axially extending passageway 64 to the outlet passageway 50 leading to the simmer burner. The outer end of passageway 6 may `be closed by another plug 58. Associated with the auxiliary main and simmer burner outlet passageways and 6' are transversely extending and interconnected main `and simmer

auxiliary passageways

15 and 16 in the valve plug which are so constructed and arranged that they both communicate with the body auxiliary outlet pas'sageways 5 and 6 in the turndown-of-both range of the valve plug. Passageway 15 has a diameter of .120 inch and 16 'a diameter of .093 inch and they are drilled at an angle and so located that their axes, at the exterior of the plug, are located 111/64 inch toward the larger diameter end of the plug from the center line of passageway 11. Passageway 5 has a diameter of .156 rinch and 6 a diameter of 1/s inch. Passageway 5 is drilled at an angle of 48 from the vertical and so that its right end, as viewed in Fig. 1, coincides with the right end of passageway 15. Passageway 6 is drilled with its center line displaced `.175 inch toward the larger diameter end of the plug 'from the center line of passageway 11.

As indicated above,

passageways

15 and 16 are interconnected in the turndown range and thus both outlet passageways are supplied with gas at the same variable pressure in the turn-down-of-both range.

Passageways

15 and 16 are also connected to the axial passageway in the valve plug for the supply of a minimum quantity of gas to the main section through valve 66. The valve 66 is an auxiliary valve which may be fixed or adjustable, as shown, and mounted `in a passageway or hollow 68 in the valve stem 70 and including a tubular outer part 72 iixedly secured as by a press lit within the valve plug. Valve 66 includesl also a rotatable part 74 having an enlarged outer end or head 76 provided with a screwdriver slot 78 whereby it can be rotated into desired angular position. The rotatable part has an axial bore 80 at its inner end communicating with the axial passageway 10` in the plug. The outer and fixed valve member 72 is provided with an annular groove 82 in the plane of the plug passageways 15 and 16 and thus providing theabove mentioned interconnection between them. This annular groove is connected to the axial bore 80 by the transverse radial pass'ageways 84 and 86 in the xed and :rotatable parts of the auxiliary valve respectively, so that upon rotation of the inner member the registry of the parts can be adjusted to predetermine the minimum ilow of gas through valve 66 to the main burner outlet passageway.

The interconnection of the main and simmer burner passageways in the turndown range through the

auxiliary passageways

5, and 16 and the annular passageway results in the application of the same regulated pressure to both the main and simmer outlet passageways, with the result that the flow through both to associated main and simmer burner sections is decreased at the same rate as determined by throttling of the iiow to the main outlet passageway at the valve plug as

passageways

2 and 12 go out of registry. The use of the orice cup 62 and auxiliary valve 66 insure the supply of a predetermined minimum flow to each burner section to supply the flow requisite to the so-called low fry position. Either or both of the minimum flows may 'be of the fixed or variable type. The minimum simmer ow may be about 450 B. t. u. per hour and the minimum main ilow may be about 2100 B. t. u. per hour. rlfhese values are illustrative and may be lowered as for example to about 1A of the full simmer flow and 1A of the main ow.

The various positions of the valve may be indicated to the user in desired manner by position indicating and determining means. The means illustrated herein will not be described in detail but it is of a character disclosed and claimed inV a copending application of Philip S. Harper, Serial No. 544,484, tiled November 2, 1955, forming a continuation of application Serial No, 162,446,

Cil

led 4M215 17, 19.50, now abandoned. The means includes' a full on and oii determining and indicating washer 92 having a radial projection (not shown) engageable with annularly spaced apart shoulders (not shown) on the valve body in the oi and full on positions of the valve. The washer encircles and rotates with but is axially movable relative to the valve stem 70. It is biased against a housing 94 by a spring 96 which also maintains the valve plug seated. Additional intermediate position indicating mechanism is located within the housing 94. The housing consists of a cup-shaped element 98 and an end cap or plate 100 through which the valve stem projects. The housing is held in assembled relation relative to the valve body by the securing screws 102. Within the housing is located a washer 104 also rotating with the valve stem and a spring element 106 cooperating with the washer for position indication.

As heretofore indicated, the valve is' operable into a plurality of operative positions from its olif position. These positions, indicated particularly in Figs. 2 to 6 and 2a to 6a; both inclusive, are a full main and simmer position, a turndown-of-both range, a low fry position, a full simmer only position, a low simmer only position and an off position. In addition to the turndown of both the full main and simmer, the ow of gas to the simmer burner only can be regulated or turned down. Fig. 9 is a graph showing approximately the rate of llow of gas (in B. t. u. per hour) in the various angular positions of the valve plug and to which reference will be had in describing the operation of the valve. The ow to the main burner section is illustrated by curve 110 and that to the simmer section by curve 112.

ln the full main and simmer position of the valve indicated in Figs. 2 and 2a, maximum quantities of gas are supplied to both the main and simmer burners. In this position the inlet passageway 1 is in full registry with passageway 11 so that gas is supplied to the axial passageway 10 and hence through aligned

passageways

12 and 2, and 13 and 3 to the main and simmer burner sections, respectively. Some gas is also supplied through the low simmer outlet passageway 66, but this is negligible in comparison to that supplied through passageway 3. In this position of the valve plug the remaining passageways are closed. The full main and simmer position is 198 from the off position as indicated in both Figs. 2 and 9. The latter shows that maximum flow to both burner sections is obtained 4in this position. As heretofore indicated, this maximum iiow is determined by the construction or adjustment of hoods 4S and 56, which are provided with orifices to predetermine the ow, and by the gas pressure. In the illustrated ow chart, the full main flow is about 8,000 B. t. u. per hour and the full simmer flow is about 1,400 B. t. u. per hour. These values are illustrative only.

in order to simplify consideration of the operation of the valve, the next position of the valve to be vconsidered is the full simmer only position illustrated in Figs. 4 and 4a. ln this position a full supply of gas is supplied to the simmer burner only as determined by the gas pressure and hood 56. The inlet passageway 1 is connected to the axial passageway 10 in the valve plug by passageway 12, the axial passageway is connected to the simmer burner outlet passageway 3 by the passageway 14 in the valve plug, a negligible flow through the low simmer outlet passageway 60 occurs and the remaining passageways are closed. The full simmer only position is at about 90-110 from the oit position. Its position can vary because the full simmer ilow obtains over a relatively wide angular range as shown in Fig. 9 and the particular position is determined by the positiOn indicating mechanism which may provide indications (such as clicks) at slightly different angular positions dependent upon the direction of rotation of the valve plug. There is no iiow to the main burner section.

The low simmer position is indicated in Figs. 5 and 5a,

In this position the inlet passageway 1 is in partial registry with the transverse passageway 12 in the valve plug and the remaining passageways are closed. As a result, gas llows to the simmer burner outlet passageway only through the orifice 62 whereby a low predetermined quantity of gas as determined by the orice and gas pressure is supplied only to the simmer burner section. As

shown in Fig. 9, this is a very small flow (such as about` 450 B. t. u. per hour) but a flow adequate to maintain ignition at the simmer burner section and which can be turned down when the valve plug is moved from the low simmer toward the off position. This turndown or regulation is effected by throttling at the inlet whereas the other turndowns or regulations occur at the outlets from the valve plug.

The nal limit position of the valve is the oil' position illustrated in Figs. 6 4and 6a. At this time the inlet passageway 1 is entirely closed so that no gas ilows to either of the burner sections. It will be noted from Fig. that a good seal is provided around the inlet passageway`1.

A turndown range of the simmer only is provided between the full simmer and low simmer positions of Figs. 4 and 5. It will be noted that in this case the throttling action or regulation of the supply is elected at the outlet side of the valve plug because of the fact that the

passageways

3 and 14, Where the throttling occurs, are considerably smaller than the plug inlet passageway 12 which is effective at this time.

Consideration will now be given to the operation of the valve in the turndown-of-both range between the full on and full simmer positions of Figs. 2 and 4, an intermediate range of which turndown range is illustrated in Fig. 2b, and the low end of which is illustrated in Figs. l, 3 and 3a. The tlow of gas in this intermediate range as a whole as well as at the low end thereof is also illustrated in Fig. 9, the turndown range extending between about 144 and to near 180. In considering this operation it will first be assumed that the valve is in its full main and simmer position as illustrated in Figs. 2 and 2a. In this position there is a full flow of gas to both burner outlet passageways as previously described.

As the plug is turned from the full main and simmer positions toward the off position, the ilow of gas to both burner sections is gradually decreased. As the valve plug is turned,

passageways

1, 2 and 3 begin to go out of registry with

passageways

11, 12 and 13 to provide slight initial turndown of ow to both the main and simmer outlet passageways. Slightly later,

passageways

5 and 6 begin to register with

passageways

15 and 16 to interconnect them and thus effectively to connect the simmer burner outlet passageway to the main burner outlet passageway. As the valve plug is turned, the flow of gas to both burner sections is simultaneously reduced as shown graphically in Fig. 9 thereby gradually to decrease the flow of gas to both burner sections to provide good frying. As

passageways

5 and 6 register with passageways 1S and 16, passageway 13 goes out of registry with passageway 3. This results in the supply of gas to both outlet passageways through body passageway 2, as shown best in Fig. 2b, so that the same variable pressure (gradually decreasing as the valve plug is turned toward oli) is applied to both passageways to effect simultaneous decrease in ow of gas through both outlet passageways to both burner sections. In this intermediate turndown range, passageway 11 remains in partial registry with the inlet passageway 1 while passageway 12 is in partial registry with both

passageways

1 and 2. As the valve plug is turned further toward olf, the low end of the turndown-of-both range is reached, as illustrated in Figs. 3 and 3a. Passageway 12 is out of registry with passageway 2 and thus the low of gas to the

interconnected passageways

5 and 6 is through the auxiliary valve 66 accompanied by some ow through thel orifice cup 62.

As the valve plug is turned still further,

passageways

6 and 16 go out of registry and the low fry position of Fig. 3b is reached. In this position the simmer burner outlet passageway is supplied solely through the oricc cup and the main burner outlet solely through the auxiliary valve 66. There can thus be no flare-up of gas flow to the simmer burner section nor a reduction in tlow thereto below the minimum required to maintain ignition. The flow through the simmer burner outlet passageway is yalso such as to maintain ignition of the main burner in the 10W fry range. Finally, on further turning of thc plug,the full simmer position is reached.

It should be mentioned that the angular positions of the plug for the various valve positions may be varied and that the position indicating means may be constructed accordingly. Also, while the low-end of the turndown-of-both range has been indicated at 144 from ol and the low fry in the range from about 144 to 130, the low fry position may be chosen to be at some angular position of the plug providing a somewhat greater gas flow, i. e., the position might well be chosen to be somewhere at the low end of the turndown-of-both range. Under this type of operation, the range from about 144 to or even to 120, where the ow of gas to the main burner outlet passageway is cut ot entirely, might be considered a sort of transition stage from double to single burner operation.

It will be observed therefore from the foregoing detailed description of the present invention that there has been provided by this invention a new and improved double valve having a number of operative positions providing a particular desirable and advantageous functioning of the valve providing in particular an advantageous conjoint turndown of the supply of gas to the main and simmer burner sections. It should be understood that while the present invention has been described in connection with the details of a particular embodiment thereof, these details are not intended to be limitative of the invention except insofar as set forth in the accompanying claims.

While there have been illustrated and described several embodiments of the present invention, it will be apparent that various changes and modifications thereof will occur to those skilled in the art. It is intended in the appended claims to cover all such changes and modifications as fall within the true spirit and scope of the present invention.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

l. A double gas valve for a double burner, including in combination, a valve body having main and simmer burner outlet passageways and an inlet passageway, a rotatable valve plug mounted in said body, and means including passageways in said plug and body for selectively connecting said inlet passageway to one or both outlet passageways and supplying full and regulatable quantities of gas through both outlet passageways in a turndown-of-both range and full and regulatable quantities anda predetermined low quantity through only the simmer burner outlet passageway, said means including passageways in the valve body and valve plug connecting saidpsimmer burner outlet passageway to the main burner outlet passageway and supplying them with gas at the same regulatable pressure for providing the turndown of gas ow through both outlet passageways.

2. A double gas valve for a double burner, including in combination, a valve body having main and simmer burner outlet passageways and an inlet passageway, a rotatable valve plug mounted in said body, and means including passageways in said plug and body for selectively connecting said inlet passageway to one or both outlet passageways and supplying full and regulatable quantities of gas through both outlet passageways in a turndown-of-both range and full and regulatable quantilies and 1 predetermined low quantity through only the simmer burner outlet passagevay, said means for supplying regulatable quantities through both outlet passageways in the turndown-of-both range including auxiliary main and simmer burner outlet passageways in the body connected to the main and simmer burner outlet passageways, respectively, passageway means in the valve plug interconnecting said auxiliary passageways in said range, and other passageway means in the valve plug for supplying gas at regulatable pressure to said main burner outlet passageway.

3, A double gas valve for a double burner, including in combination, a valve body having `main and simmer burner outlet passageways and an inlet passageway, a rotatable valve plug mounted in said body, and means including passageways in said plug and body for selectively connecting said inlet passageway to one or both outlet passageways and supplying full and uniformly regulatable quantities of gas through both outlet passageways and full and regulatable quantities and a predetermined low quantity through only the simmer burner outlet passageway, said means for Isupplying said uniformly regulatable quantities through both outlet passageways including auxiliary main and simmer outlet passageways in the body connected to said outlet passageways, respectively, and other passageway means in the valve plug interconnecting said auxiliary passageways and supplying the same variable pressure to said outlet passageways.

4. A double gas valve for a double burner having main and simmer burner sections, including in combination, a valve body having a plug receiving chamber, main and simmer burner outlet passageways and an inlet passageway opening into said chamber, said main and simmer burner outlet passageways including substantially diametrically opposed portions and the inlet passageway being substantially intermediate them, a rotatable valve plug mounted in said chamber, and means including passageways in said plug and body for selectively connecting said inlet passageway to one or both outlet passage- Ways and Supplying full and uniformly regulatable quantities of gas through both outlet passageways and full and regulatable quantities and a predetermined low quantity only through the simmer burner outlet passageway, said last mentioned means including axial and transverse passageways in the plug of which certain connect the axial passageway in the plug to the inlet passageway in the operative positions of the valve and of which certain are aligned with said main and simmer outlet passageway portions in a full on position, and of which the aligned simmer burner outlet passageways go out of registry before the aligned main passageways as the valve plug is turned from full on toward off, said last mentioned means including also auxiliary main and simmer burner passageways in the valve body connected to said main and simmer outlet passageways and interconnected auxiliary main and simmer burner outlet passageways in the valve plug which communicate with said auxiliary passageways in the body in a turndown range in which gas issupplied to the main outlet passageway and from the latter through said auxiliary outlet passageways to the simmer burner outlet passageway, whereby uniformly regulatable quantities of gas are supplied through both outlet passageways with the same pressure maintained vin both outlet passageways.

5, A double gas valve for a double burner having main and simmer burner sections, including in combination, a valve` body having main and simmer burner outlet passageways and an inlet passageway, said main and simmer burner outlet passageways including substantially diametrically opposed radial portions and the inlet passageway being substantially intermediate them, a rotatable valve plug mounted in said body and means including passageways in said plug and body for selegtively Connecting said. inlet pas# sageway to one or both outlet passageways and supplyf ing full l1nd uniformly regulatable quantities of gas, through both outlet passageways and full and regulatable quantities and a predetermined low quantity only through the simmer burner outlet passageway, said last men- 4iioned means including axial and transverse passageways in the plug of which certain connect the axial passageway in the plug to the inlet passageway in the operative positions of the valve and of which certain are aligned with said radial main and simmer outlet passageway portions in a full on position and of which the aligned simmer burner outlet passageways go out of registry before the aligned main passageways as the valve plug is turned from full on toward oil, said last mentioned means including also auxiliary main and lsimmer burner passageways in the valve body and valve plug whichcommunicate with each other in a turndown range in which gas is supplied to the main outlet passageway and from the latter through said auxiliary outlet passageways to the simmer burner outlet passageway whereby regulatable quantities of gas are supplied through both outlet passageways with the same pressure maintained in both outlet passageways.

6. A double valve as claimed in claim 5 wherein said valve plug includes a further transverse passageway providing communication from the axial passageway in the plug to said radial portion of the simmer burner outlet passageway in said `full simmer position.

7. A double gas valve for a double burner, including in combination, a Valve body having a plug receiving chamber, main and simmer burner outlet passageways with radial portions opening into said chamber and an inlet passageway opening into said chamber, a valve plug mounted in said chamber for rotation between an o i position and a plurality of operative positions and having an axial, passageway and. transverse passageways opening into said axial passageway supplying gasY from the inlet to said axial passageway in the operative positions of the valve and of which certain are aligned with said inlet passageway and with said main and simmer outlet passageway portions in a full on position and provide a turndown of gas ow through both said portions as the plug is turned toward an offiposition from said full on position, said aligned simmer passageways being smaller than the aligned main whereby turndown of ow to the simmer through said simmer passages occurs at the initial portion of turndown of flow through said aligned main passageways after which said simmer passageways go out of registry Aand flow therethrough is terminated, means including other passageways in said plug and body communicating with both said main and simmer outlet passageway portions for supplying regulatable quantities of gas through both said main and simmer outlet passage-v ways at the same variable pressure as the valve is turned further toward the ofr position to turn down ow through said. aligned main passageways in. the kplus and body, passageway means with a ow restricting orifice therein connecting the axial passageway in the plug to Isaid main outlet passageway for supplying a low quantity of gas as determined by said flow restricting means through said main burner outlet passageway, said plug including a further transverse passageway for supplying a full supply of gas through only the simmer burner outlet passageway in a full simmer position and regulatable quantities to that passageway as the valve plug is turned toward the on? position from the full simmer position, said plug being rotatable from said full simmerp osition further toward oit position into` a low simmer position in which the said outlet passageway portions are closed by the plug, and means including a low simmer passageway in the body having a iiow restricting oriiice connecting the axial passageway only to said simmer burner outlet passageway for supplying a predeterminable -low quantity of gas through the. simmer burner outlet passageway in the said low simmer position andl also when` said low quantity l 1 A of` gas is supplied through said flow restricting means to said main burner outlettpassageway. y

8. A double gas valve for a double burner, including in combination, a valve body having a plug receiving chamber, main and simmer burner outlet passageways with radial portions opening into said chamber and an inlet passageway opening into said chamber, a valve plug mounted in said chamber for rotation between an oit position and a plurality of operative positions and having an axial passageway and transverse passageways opening into said axial passageway supplying gas from the inlet to said axial passageway in the operative positions of the valve and of which certain are aligned with said inlet passageway and with said main and simmer outlet passageway portions in a full on position and provide a turndown ot gas ow through both said portions as the plug is turned toward an oi position from said full on position, said aligned simmer passageways being smaller than the aligned main passageways whereby turndown of ow through said aligned simmer passages occurs at the initial portion of turndown of ow through said aligned main passageways after which said simmer passageways go out of registry and flow therethrough is terminated, means including auxiliary main and simmer transverse passageways and a passageway interconnecting them in said plug and auxiliary main and simmer passageways in said'body communicating with both said main and simmer outlet passageway portions and said auxiliary plug passageways in a turndown range for supplying regulatable quantities of gas through both said main and simmer outlet passageways as the valve is turned further toward the off position to turn down flow through said aligned main passageways in the plug and body, passageway means with a flow restricting orice therein connecting the axial passageway in the plug to said interconecting passageway for supplying a low quantity of gas determined by said flow restricting means through said main burner outlet passageways, said plug including a further transverse passageway for supplying a full suply of gas through only the simmer burner outlet passageway in a ullsimmer position and regulatable quantities to that passageway as the valve plug is turned toward the off position from the full simmer position, said plug being rotatable from said full simmer position further toward off position into a low simmer position in which the said outlet passageway portions and further passageways in the body are closed by the plug, and means including a low simmer passageway in the body having a ow re- -stricting orifice connecting the axial passageway only to said simmer burner outlet passageway for supplying a predeterminable low quantity of gas through the simmerv burner outlet passageway in the said low simmer position and when said low quantity of gas is supplied through said ow restricting means to said main burner outlet passageway.

9. A double gas valve for a double burner, including in combination, a valve body having a plug receiving chamber, main and simmer burner outlet passageways with radial portions opening into -said chamber and an inlet passageway opening into said chamber, a valve plug mounted in said chamber for rotation between an oi position and a plurality of operative positions and having an axial passageway and transverse passageways opening into said axial passageway supplying gas from the inlet to said axial passageway in the operative positions of the valve and of which certain are aligned with said inlet passageway and with said main and simmer outlet passageway portions in a full on position and provide a turndown of gas ow through both said portions as the plug is turned toward an oi positon from said full on position, said aligned simmer passageways being smaller than the aligned main passageways whereby turndown of ow through said aligned simmer passages occurs at the initial portion of turndown of ilow through said aligned main passageways after which said simmer passageways go out 12 of registry and How therethrough is terminated, means including auxiliary main and simmer transverse passageways and a passageway interconecting them in said plug and auxiliary main and simmer passageways in said body communicating with both said main and simmer outlet passageway portions and said auxiliary plug passageways in a turndown range for supplying regulatable quantities of gas through both said main and simmer outlet passageways as the valve is turned further toward the off position to turn down flow through said aligned main passageways in the plug and body, the auxiliary simmer plug passageway going out of registry with its associated auxiliary simmer body passageway before the auxiliary main passageway in the plug goes out of registry with its associated auxiliary main body passageway, passageway means with a ow restricting orifice therein connecting the axial passageway in the plug to said interconnecting passageway for supplying a low quantity of gas as determined by said ow restricting means to said main burner outlet passageway, said plug including a. further transverse passageway for supplying a full supply of gas through only the simmer burner outlet passageway in a full simmer position and regulatable quantities to that passageway as the valve plug is turned toward the off position from the full simmer position, said plug being rotatable from said full simmer position further toward ott position into a low simmer position in which the said outlet passageway portions and further passageways in the body are closed by the plug, and means including a low simmer passageway in the body having a flow restricting orifice connecting the axial passageway only to said simmer burner outlet passageway for supplying a predeterminable low quantity of gas in said low simmer position and also when said low quantity of gas is supplied through said ow restricting means to said main burner outlet passageway.

l0. A double gas valve for a double burner, including in combination, a valve body having main and simmer burner outlet passageways and an inlet passageway, a rotatable valve plug mounted in said body, means including passageways in said plug and body for selectively connecting said inlet passageway to one or both outlet passageways and supplying full and regulatable quantities of gas through both outlet passageways in a turndownof-both range and full and regulatable quantities and a predetermined low quantity through only the simmer burner outlet passageway, said means including passageways in the valve body and valve plug interconnecting said main and simmer burner outlet passageways and supplying them with gas at the same regulatable pressure for providing the turndown of gas ow through both outlet passageways, and means including flow restricting means in the valve plug for supplying a predetermined low ow of gas through said main outlet passageway in the range between full supply of gas through both outlet passageways and through only the simmer outlet passageway.

ll. A double gas valve for a double burner, including in combination, a valve body having main and simmer burner outlet passageways and an inlet passageway, a rotatable valve plug mounted in said body, means including passageways in said plug and body for selectively connecting said inlet passageway to one or both outlet passageways and supplying full and regulatable quantities through both outlet passageways in a turndown-of-both range and full and regulatable quantities through only the simmer burner outlet passageway, said means ineluding passageways in the valve body and valve plug interconnecting said main and a simmer burner outlet passageways and supplying them with gas at the same regulatable pressure for providing the turndown of gas flow through both outlet passageways, and means including passageways each having ow restricting means therein between said inlet and associated outlet passageway for 13 supplying each of the outlet passageways with a predetermined low ow of gas.

12. A double gas valve for a double burner, including in combination, a valve body having main and simmer burner outlet passageways and an inlet passageway, a rotatable valve plug mounted in said body, and means including passageways in said plug and body for selectively connecting said inlet passageway to one or both outlet passageways for supplying both outlet passageways with full and regulatable ow of gas in a turndown range and also supplying a predetermined minimum low flow of gas through both outlet passageways in another range of movement of the plug and a predetermined minimum low ow of gas through only the simmer burner outlet passageway in a further range of movement of said plug, said last mentioned means including How restricting means individual to each of said outlet passageways.

References Cited in the le of this patent UNITED STATES PATENTS 651,755 Gys June 12, 1900 10 2,095,064 Harper Oct. 5, 1937 2,113,027 Kindl Apr, 5, 1938 2,162,231 Schoenberger June 13, 1939 2,284,994 Stuckenholt June 2, 1942