US2650613A - Graduated universal valve for gas appliances with slitted sleeve - Google Patents

Description

P 195-3 1. v. BRUMBAUGH 2,650,613

- GRADUATE!) UNIVERSAL VALVE FOR GAS APPLIANCES WITH SLITTED SLEEVE Filed May 15, 1948 2 Sheets-Sheet 1 INVENTOR.

, |5MC VERNON BRIIMBAUGH F i g. 4 BY Sept. 1, 1953 v. BRUMBAUGH 2,650,613

. GRADUATED UNIVERSAL VALVE FOR GAS APPLIANCES WITH SLITTED SLEEVE Filed May 15, 1948 2 Sheets-Sheet 2 I INVENTOR! ISAAC VERNON BRIJMBAUGH Patented Sept. 1, 1953 UNITED STATES PATENT OFFICE GRADUATED UNIVERSAL VALVE FOR GAS APPLIANCES WITH SLITTED SLEEVE 10 Claims.

The invention described in this application relates to valves. The valve disclosed and described herein in illustration of the invention is especially designed for use in controlling a cooking top burner of a kitchen range but it is to be understood that the inventions involved clearly have other uses. Thus the inventions involved are also useful in the control of gas oven burners. They may also be used for the control of gas outside of the cooking field, such as the various types of gas heating appliances. They may even be used for the control of other fluids including liquids as well as gases. The valve illustrated is designed so that not only may the gas be turned on and off but also the size of the flame may be varied as the valve is rotated from the full-on position to the off position or from the off position to the full on position or from the full on position to the simmer position, etc. For example as illustrated the size of the gas flame may be decreased through a series of steps from an on or maximum flow position down to a condition in which the flame will provide onl enough heat to cause the material being cooked to boil gently or simmer and then the gas may be cut off by a movement of the valve to the closed or off position. On the other hand if desired, I may modify the design to provide similar valves in which the valve may be turned from the off position directly to the full on position and then the flame may be decreased gradually through a number of positions to the simmer position.

Prior hereto the large majority of gas valves (especially valves for controlling the cooking top burners of gas ranges) have been produced with a casing having a single port and a plug formed I with a single port which may be moved into and out of registration with the port in the casing so that in the open position there is substantially a full flow of gas and in the closed position there is no flow of gas. As the ports in such prior art valves are brought from exact registration to the closed position there is a decrease in the size of the flame produced but inasmuch as the control is not usually accurate nor definite therewith, the operator of such prior art devices had to be very careful to prevent the gas from being turned completely off or to such a low position that the flame would go out. In order to obviate this difficulty some designers have designed valves with a plurality of different sized ports through which gas may flow. These are usually complicated and expensive to manufacture and some are very difficult to control. In none of such prior art valves having a plurality of ports can the adjustment 2 be made for the heating value of the gas as hereinafter defined.

In my valves as illustrated herein the various settings of the gas flame are controlled by the use of numbers on the knob or control dial so that after the valve is properly adjusted, an operator may set the valve for any desired flame without looking at the flame but merely by the use of the numbers on the knob. It is true that some valves constructed according to my inventions, could be operated in the full on position and adjacent thereto in a manner similar to the manner in which the prior art single port valves may be operated as described above (i. e. as the ports are brought from exact registration) (1. e. the full on position) to closed position there is a decrease in the size of the flame produced. However, my valves are not intended or expected to be so operated. It is so much more satisfactory to operate my valves in the manner in which they are especially intended that the operators will never resort to the cumbersome operation which is similar to the operation of the prior art valves.

My inventions are especially important when used in connection with gases having high heating values (1. e. high B. t. u. ratings) such as the bottle gases (i. e. liquefied petroleum gas such as butane and propane) and also the natural gases. With such gases it is especially difficult with the single port prior art valves to obtain a simmer flame without inadvertently extinguishing the flame entirely. The prior art valves heretofore referred to, which are formed with a plurality of ports on the other hand are not usually satisfactory with all types of gases because of difficulties in adjusting them for the wide range in heating value, specific gravities and distribution pressure of gases used. The table given in my co-pending application, Serial No. 776,687, filed September 29, 1947, gives the approximate statistics for various types of gases and illustrates the wide differences in these important characteristics thereof. Not only the B. t. u. value of the gas but also the specific gravity thereof and the distribution pressure under which the gas is supplied, affect the adjustment of the valve. Whenever used hereinafter in this specification and claims, I intend the words heating value or heat value to be construed to mean heating value, specific gravity of gas and/or distribution pressure thereof at the appliance, etc.

In the valves described and shown in this ap plication in illustration of my invention I provide a plug member with a series of substantially Objects One of the objects of my invention therefore, is the construction of an improved valve especially useful in connection with gas burners, the valve being simple in operation and economical inconstruction. A further object of .my invention is the provision of a valve especially useful in connection with gas burners which may be adjusted from a full on position through a series of positions to .a simmer setting position or may alternatively be moved to an off position.

A further object of my invention is the provision, in combination with a valve of the character described, of means for adjusting the valve to compensate for different heating values of the gas for which it is .to be used.

Features of my invention include the provision of a body member formed with an inlet port and an outlet port; having associated therewith a plug formed with a plurality of ports spaced around the circumference thereof; and having associated and combined with the plug and having a restricting port for each of the ports of the plug valve and arranged to be adjusted relative to these ports in order to restrict or increase the size of allof the ports simultaneously in order to compensate for the heating value of the gas being used. It should be understood that the plug may be rotated to register each of the ports of the .plug separately and selectively with the inlet port of the casing so that the valve in operation may control the size of the flame to provide a flame of the size desired corresponding to each of the ports as modified by the associated port of the sleeve, whereby adjustment of the valve for different heating values of the gas is possible and whereby after adjustment operation of the valve to control the size of the flame is possible.

Further objects and features of the invention will be apparent from the subjoined specification and claims when considered in connection with the accompanying drawings showing for the purpose of illustration only the embodiments of my invention.

Drawings In the drawings,

Fig. 1 is a view in side elevation of a valve constructed .according to :my invention the valve being shown associated with the front plate or main panel and cooking top frame of a cooking range and with the mixing :tube thereof, portions of the valve, the mixing tube, the plate, the frame, and the gas manifold being shown in section;

Fig. 2 is a view in front elevation of the valve of Fig. 1 showing also a fragment of the range with which it is associated; 1

Fig. 3 is a view in front elevation of the valve of Figs. 1 and 2, portions of the range and the control knob having been removed;

Fig. 4 is a view in vertical section taken substantially on the line 4-4 of Fig. 2;

Fig. 5 is a view in vertical section taken substantially on the line 5-5 of Fig. 1;

Fig. 6 is a view of the sleeve in elevation;

Fig. 7 is an expanded view of the sleeve showing the sleeve as it would appear if severed and unrolled;

Fig. 8 is a sectional view similar to Fig. 4 showing an alternative form of valve; and

Fig. 9 is a view similar to Fig. 5 showing another vertical sectional view of the valve of Fig. 8.

Referring now to the drawings for a detailed description of the invention it may be seen that I have shown in Fig. 1 a valve ll associated with .a range having a mixing tube I2, a main panel 13, and a cooking top frame [4. The valve H has a downwardly extending inlet boss I5 which is screwed into an inlet gas manifold 16. The mixing tube 12 is provided with an air shutter H which is held in any desired adjusted position by a screw l8. The inner end of the valve H is formed as a threaded projection or nozzle [9 onto which there is screwed an orifice cap 2| which extends into the mixing tube l2. The boss [5 is formed with an inlet bore or passage 20. The valve H has a main body member 22 and this is provided with a spring cap 23 forming a casing or cover. Within the body member 22 and the casing 23 is a plug member having a stem 24 which extends forwardly from the valve and on which there is removably secured a knob or dial member 25. As may be seen in Fig. 2 this knob or dial member is formed with markings off, sim, 2, 3, 4, 5, 6, and on. These markings cooperate with an indicating mark 26 formed on the panel I3 to indicate the position of the valve and indicate the amount of gas which may flow through the valve at the corresponding setting thereof.

As may be seen more clearly in Fig. 3, the stem 24 is formed with a relatively short flat surface 2'! and a relatively large flat surface 28 by reason whereof the position of the knob 25 on the stem 24 is accurately determined. Associated with the stem 24 is a stop sleeve 29 which as shown in Figs. 1 and 3 surrounds a portion of the stem 24. It is to be understood that this stop sleeve cooperates with a stop 3| formed as an indentation in the casing member 23 and so limits the movement of the dial 25. Thus the stem 24 and its associated plug may not be turned beyond the off position in one direction (clockwise in Fig. 3) and the full on position in the other direc tion (counterclockwise in Fig. 3). As may also be seen in Figs. 1 and 3 the casing or spring cap 23 is secured to the main body member 22 by means of a relatively large screw 32 and a relatively small screw 33 which pass through corresponding pairs of ears formed on the body member 22 and the casing 23.

Referring now especially to Figs. 4 and 5 it may be seen that the stem 24 is a part of a plug member 34. The plug member 34 is hollow as at 35 and houses within said hollow-a sleeve member 36. This sleeve member is important in connection with this embodiment of my invention and will be described more completely later. This sleeve member 36 is resiliently held in position by an off center screw 37 threaded into the plug 34 and extending through an off center opening to the sleeve 36. A spring 38 bears at one end on the base of the sleeve 36 and at its opposite end on the head of the screw 31. Bearing also on the base of the sleeve 36 but onthe opposite side from the spring 38 is an obliquely extending adjustment screw 39 the head of which may be seen in Fig. 3. It will .be noted that this adjustment screw is wholly within the spring cap 23.

As will be more fully described later the adjustment screw 39 acting on the sleeve 36 positions the sleeve 36 as may be desired, it being understood that the spring 38 maintains the sleeve 36 always in contact with the screw 39. It will also be noted that in the simmer position access to the screw 39 is possible through a notch 40. P- sitioned between the stop sleeve 29 and the main body of the plug 34 is a spring 4|. The spring 4| surrounds a reduced portion 42 of the plug 34 and maintains the stop sleeve 29 and the plug 34 in correct position.

Referring now to Figs. 5, 6, and 7 for a more specific description of the sleeve 36 it may be seen that the sleeve is formed with a relatively large notch, slot or port 46 formed in both the base and side of the sleeve. This larger notch 46 is provided to allow a full flow of gas at the "on position. The sleeve is also formed with a plurality of oblong slots of varying widths such as 41, 48, 49, 5|, 52, and 53. These slots vary in width from the relatively narrow slot 53 to the relatively wide slot 4?. They are oblong with parallel sides and the end which cooperates with the associated round port in the plug is arcual. The opposite end may also be arcual, although this is not material. By this construction a finer and more accurate adjustment with gases of high heating value is possible. The sleeve is also formed with an imperforate portion 54.

As appears most clearly in Fig. 5, the plug 34 is formed with a series of ports 55, 55, 51, 53, 59, 6|, and 62 which correspond in position with the ports 46, 41, 48, 49, 5|, 52, and 53. However, all of the plug ports 56, 51, 58, 59, 6|, and 62 are round and of substantially equal size. They could be drilled simultaneously or consecutively on the same center line and in the same plane. The port 55 is oval in shape. The plug also has an imperforate portion 63 corresponding to sleeve portion 54. The inlet port from the inlet bore or passage is oval as shown at 69 and as may be understood from a comparison of Figs. 4 and 5.

It is believed that the operation of the valve described above will be fairly obvious from the description. With the valve in the position shown in Figs. 2, 3, 4, and 5, gas may flow from the manifold |6 through the inlet passage 20 through the plug port 62, and the sleeve simmer port 53 into the interior of the sleeve and thence through the nozzle IS, the orifice cap 2| into the mixing tube l2 and thence to the burner to maintain a flame which will give enough heat to boil material placed thereon gently or to simmer. If the valve is turned in a clockwise direction (as shown in Fig. 2 or 3) or in a counterclockwise direction (as shown in Fig. 5) until the stop sleeve 29 contacts with the stop 3| and the indication oil registers with the arrow 26, the imperforate portions 54 and 63 will cover the inlet port opening from the inlet passage 20 so that no gas may flow from the gas manifold |6 to the mixing tube I2. If on the contrary the valve is turned in a counterclockwise direction as shown in Figs. 2 and 3 (clockwise as shown in Fig. 5) thesleeve ports 52, or 5|, 49, 48, 41, and 46 may be caused successively to register with the inlet port connected with the inlet passage 20 so that successively larger amounts of gas may flow to maintain successively larger flames. Thus the user may secure a flame of any intensity desired by the user. If the valve is turned still farther in a counterclockwise direction as is shown in Figs. 2 and 3 (clockwise direction as shown in Fig. 5)

substantially a full flow of gas will be allowed through the inlet passage 20, the ports 46 and 55, the interior of the sleeve 36, the nozzle IS, the orifice cap 2|, and the mixing tube l2 to the burner.

The valve may be adjusted for gases of various heating values. For the purpose of adjusting the valve to the desired settings the valve is first turned to the full on position and the orifice cap 2| and the air shutter H are adjusted to give the proper flow of gas and the proper air adjustment respectively. Then the valve is turned back to the simmer position and the screw 39 is adjusted to move the sleeve inward or outward until the flame is the minimum that will be maintained without danger of going out.

It should be here noted that access to the screw 33 is only possible when the plug of the valve is set in the simmer position. Thus the positioning of the valve for the simmer position is in a sense automatic. That is to say it is impossible to try to adjust the flame to a simmer setting except when the plug is positioned at the simmer position.

The intermediate positions are automatically adjusted for the heating value of the gas by the single adjustment.

It will be understood that more or less of the area of the oblong sleeve ports 41, 48, etc., is uncovered depending on the heating value of the gas being used. When adjusted for use with the liquefied petroleum ases only about 10% of their area is utilized. The natural gases require a setting where the oblong ports are much further uncovered. The mixed gases require still larger openings. The manufactured gases (especially if the prevailing gas pressure is low) may require a setting wherein the oblong sleeve ports are near the fully uncovered position. It may also be noted that the screw 39 and notch 4|) might be positioned at other places on the circumference of the valve provided they are both moved together and provided the screw 31 does not interfere and provided that the inner end of the screw 39 is positioned so that it may not enter the notch 46. It is to be understood that one edge of the oblong ports 41-53 inclusive overlaps one edge of the associated round ports 56-62 inclusive. The amount of the overlap depends on the adjustment of the sleeve 36 by the screw 39. The edges which overlap may be called the adjustment edges. I wish to point out here that lines drawn to contact the adjustment edges of ports 41-53 and 56-62 should preferably be parallel. Because of the oval shape of the port 69, it is not so important that these lines be parallel to circumferences of the plug, but it is important that they be parallel to each other in order that movement of the sleeve 36 by the screw shall adjust each of the ports proportionately.

In the embodiment shown in Figs. 8 and 9 the main body 34 is provided with a nozzle 92 and with a spring cap casing 93. The plug 64 is formed with a longitudinal axial bore through which the relatively long screw 65 extends. This screw 65 is formed with a shoulder at 66 against which the base of the sleeve 61 bears. At its rearward end the screw 65 is provided with a nut 68 which bears against a spring 69 interposed between the nut 68 and the base of the sleeve 61. A guide pin 1| secured in the plug 64 extends through a hole formed in the sleeve 61 and causes the sleeve to rotate coincidentally with the plug 64. A spring 12 is interposed between the plug 64 and a stop sleeve 13 which cooperates wi h a er ind ntat on Thenlus 54 is stormed with an obl n no -t 5 and sound he s Flo-.8! inclus ve and the sle ve s -o d with var in w dth s t-like o t 8-3- 8 i ws an with a large slot or notch 82. The plug is ioripegl wi h a mp r o at i n 89 a d th slee wi h a o ndin mp r o at r i n 99- The m in o y i fo med it a h e d oss 9. ada t d to be t ea d to th a i take manifol The op ati n of thi embod m n sim la to that of th embo ent pr v u y des i ed- Adiustmen o e simm e n is a eom r lished b tu n n th va ve to th s m e o ition, rem val of the .kno or dial m mber a ad u tm o e ew t .Featu es f m i en io n p ou y sufficie tl emp si ed h e sha e o t n ck 69 of the inlet port ;20 and the shape of the neck 35 of the inlet port 55. As may be seen by comparison of Figs 4 and 5 and by comparison of Figs. 8 and 9, the necks or ports 80 and 95 are ob on with t e greater len h xte l tudinally of the valve. As stated above the port 55 is oval or oblong in shape and ports 56, 57, 58, 59, .BI, and 62 are round in shape. The port 55 corresponds substantially in size with the size of the neck or port 80. Similarly as stated above the port is oblong in shape and ports KG-8| inclusive are round in shape with the port 35 corresponding Substantially in size with the neck or port 95. These features make it possible to obtain a relatively large number of ports (or valve positions) with a plug and valve body of regular size.

It is not necessary to hold the stem of the plug when adjustment of screw ,39 is being made. It is best however, to hold the stem of the plug when making simmer adjustment of screw 65 (Fig. 8). The full on flow of gas is determined by the position of the orifice cap. The proper flame characteristic is determined by adjustment of the air shutter.

The embodiments of the valve disclosed here.- in are also shown in my application Serial No. 66,710,'filed December 22, 1948, which is intended to include claims generic to the inventions dis? closed herein. Said application Serial No. 66,710 also discloses embodiments of my inventions disclosed in my application Serial No. 776,687, filed September 29, 1946, and my application Serial No. 6,119, filed February 5, 1948.

It is to be understood that the above described embodiments of my invention are for the purpose of illustration only. Various changes may be made therein without departing from the spirit andscope of the invention.

I claim:

1. A valve comprising a non-rotatable casing member, a rotatable rotor member formed with a recess, formed with an open end, and having a plurality of openings all of substantially equal size, substantially equally spaced around the circumference of the plug; a hollow cylindrical sleeve formed with an open end, positioned in said recess, rotatable with said rotor member. and having ,a plurality of substantially equally and circumierentially spaced slits of progressively increased widths which are respectfully spaced in the same angular position circumferentially as the respective openings in the rotor member and register substantiall With said openings in the rotor member; a handle for turning said rotatable rotor member and said sle ve b r t a p u al ty o dif e ent posit ohs to c nt o the am unt of a fl win therethr ush, th ize oi he home nd th hea devel ed and means to m ve sai sl eve lon ie u i ly re ative to the casin and to the ratotobl ot member to ar he re i tration of th orts to rod ce infini e numb r o p o nor on orifioe. sizes b h perati n f each indi dua sli and it cooperating rotor openin 2- A lve om ri he a c si ha in an inlet po t nd an o tlet po t; a rotor member Po t oned in. said casin and formed with a plurality of circumferentially spaced side openings eohh o eo i h o e o sa d p rt and ormed wit a oess havi a o en n a one end c nne ted wi h th other o sa d p rts; a c ndrical s eeve having an pen end. po i n d i said recess, termed ith oirou ierehti llv paced s de p h ;ihs re is ri sub ta ti l y w t th de n ni ss of the rot memb and r tata l wi h said rot memb r to a pl ra i y o rotata l osition in o d r t c nt h am u t o fl i pass n the e ish e nden u n the rotated p sition of the rotor member and the sleeve relative to he sin a sp in b arin u n a d sle ve and moms in one di ection with n sa d oto m mbe and a s rew bea i upo said sleeve for moving it in the opposite direction and linearly p ra le th the axis of r tati ther of and actin in cooperation with said spring to adjust simultaneously th f ectiv s z s oi the side penn in t e r o m mber to control th m un of fluid which may pass through said valve for a plurality of said rotative positions.

3. A valve comprising a casing, formed with a ar i e o t on on s e h of ormed with an ut t at one end thereof a d h in a a d r c s a apered P us osit on d i sai recess, o w th a c lind ical bo e ha n Open en theme ard said outl med with a vely lar inlet openi g ar an ed to eis r a im s wit said in e p t and th a p ra y i sma e nl t openings ch a ran ed to re s e at other m s w th said in t rt; a cylindrical hollow sleeve having one open end, p s ned n a or hdr o bo e ha n i open end communicating with said outlet, having a relatively large port substantially registering at all times with the larger inlet opening, and havinga plura ity o slits a ha in a di e ent w d h a d ac eg te ing su s an ially with one of aid sm e th s inl open n s; .me -ns onistihs o a sprin bea in on th b se of. a d sleeve and urging the sleeve in one direction and an adju me sc ew b a ing n e a of d sleeve in t e opposit dir ct on to m in said le ve ngi u in ly of th valve n sa d op osi e di e tion to va the overl ppin of eooh or said s eev openin s rela i e to s esis in p u opening to adjust simultaneously the effective ite o each of so o peni s; and means consistih of a cap having a cut-out portion regist rms w h he p si on or the Screw when the plug turned so that the most. narrow slit is re istered with the inlet port, for preventing ad, iuStIhQht of said adjustment screw except when said most na row ,slit is registered with said inlet port,-

in a Wi d E a, non-rotative casing member h l l inlet opening and an outlet opening; a otot v a oe membe positioned therein and formed with an inlet port registrable with the n e open ng and te me with a cen ral recess. whi h re ss i oohne ted with h let port; a ho lo oy in riool sleeve h vin an open end w ch pen end whht fited. with said outlet opening, having the opposite end closed to form an inside bottom surface, being positioned in said recess, and being formed with a port registering With the plug inlet port; a headed bolt member positioned in an oil-center hole in said plug member and extending within said recess substantially longitudinally of the valve through an off-center hole in said sleeve so as to prevent rotation of said sleeve relative to said plug while allowing relative movement of the sleeve to the plug parallel with the rotative axis; a spring positioned between the head of said bolt and the inside bottom surface of said sleeve and means for moving said sleeve parallel with said rotative axis against the action of the spring.

5. A valve comprising a stationary casing having an inlet port and an outlet port; a rotative plug within said casing having a recess with an opening at one end which is connected to one of said ports and having a plurality of circumferentially spaced side openings positioned in axial alignment and each connected to the other of said ports; a sleeve within said recess formed with a plurality of circumferentially spaced side openings positioned in axial alignment and each substantially registering with one of the side openings of the plug; means for preventing rotation of the sleeve relative to the plug and for maintaining the side openings of the sleeve in substantial registration with the side openings of the plug; and means for moving said sleeve longitudinally relative to the plug to vary the effective size of the openings formed by the respective side openings in the plug and the registering side openings in the sleeve.

6. A valve comprising a casing, formed with an inlet port on one side and with an outlet at one end thereof and having a tapered recess; a tapered plug in said recess, formed with a cylindrical bore having an open end facing toward said outlet, formed with a relatively large inlet opening arranged to register at times with said casing inlet port, and formed with a plurality of smaller inlet openings spaced circumierentially of the plug, positioned in axial alignment, and each arranged to register at other times with said casing inlet port; a cylindrical hollow sleeve having an open end, being positioned in said cylindrical bore, having its open end communicating with said outlet, having a relatively large port substantially registering at all times with the large inlet opening and having a plurality of relatively small openings spaced circumferentially of the sleeve, positioned in axial alignment, and each registering substantially with one of said smaller inlet openings; means comprising a screw for moving said sleeve longitudinally to vary the longitudinal registration of said relatively small openings with the smaller inlet openings to vary simultaneously the efiective size of all of said smaller inlet openings; and means constraining said sleeve against rotation relative to said plug.

7. A valve having the structure of claim 5 in which the ports in the plug are round and in which the ports of the sleeve are oblong ports having parallel sides, having at least one end formed as an arc, and each having a different size from each of the others.

8. A valve having the structure of claim 5 in which the ports in the plug are round and in which the ports in the sleeve are oblong ports having parallel sides, having at least one end formed as an arc, each being of a difierent size, and having one edge of each overlapping one edge of the plug ports so that a line drawn through the overlapping edges of the plug ports is parallel to a line drawn through the overlapping edges of the sleeve port.

9. A valve having the structure of claim 2 in which the casing has a tapered recess; the rotor member is a tapered plug in said tapered recess; the recess in the rotor member is a cylindrical bore having an open end facing towards said outlet; the rotor member is formed with a relatively large inlet opening registering at times with said casing inlet port, and is formed with a plurality of smaller inlet openings each registering at other times with said casing inlet port; the cylindrical sleeve is hollow, has its open end communicating with said outlet, has a relatively large port substantially registering at all times with the large inlet opening of the plug and has a plurality of smaller openings each registering substantially with one of said smaller inlet openings of the plug.

10. A valve having the structure of claim 2 in which the casing has a tapered recess; the rotor member is a tapered plug positioned in said tapered recess; the recess in the rotor member is a cylindrical bore having its open end facing toward said outlet; the rotor member is formed with a relatively large inlet opening arranged to register at times with said casing inlet port, and is formed with a plurality of smaller inlet openings all of substantially the same size as each other and each arranged to register at other times with said casing inlet port; the cylindrical sleeve is hollow, has its open end communicating with said outlet, has a relatively large port substantially registering at all times with the larger inlet opening of the plug, and has a plurality of smaller slit openings positioned at the same angular position as the smaller inlet openings of the plug and each arranged to register substantially with one of said smaller plug inlet openings; and the means for moving the sleeve longitudinally changes the orifice size of each slit proportionately with each other slit so that the valve is universal for all kinds of gas.

ISAAC VERNON BRUMBAUGH.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,214,457 Hard Jan. 30, 1917 1,674,743 Rudolph June 26, 1928 1,810,331 Wilhjelm June 16, 1931 1,827,555 Bolton Oct. 13, 1931 2,101,356 Zak Dec. 7, 1937 2,106,310 Warrick Jan. 25, 1938 2,229,826 Thornbery Jan. 28, 1941 2,252,185 Kluse Aug. 12, 1941 2,288,913 Moecker July 7, 1942 FOREIGN PATENTS Number Country Date 375,821 France of 1907 552,778 Germany of 1932 637,448 France of 1928 772,759 France 11 of 1934

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