US2299665A - Gas valve - Google Patents

Description

Oct; 20, 1942. G. F. TURNER lE'rm.

GAS VALVE Filed Feb. 12. 1941 2%. z. L 'www4 Patented' Oct. 20.1.942

Gas vsLva j t George F. Turner, Vincent 0. Peterson, and Doaald W. Bol, Wyman Company, C ot Illinois appaeauon remar! is. im, serai se. msu

dClaims.

The present invention to gas valves and more particularly to the provision of a valve with Chia'oJll-.asisnerstollarpercaselli-.omvormen improved low adjustment means for accurately regulatins the flow oi very small quantities ot gas to a burner. The low adjustment means ci this invention may be applied to high-low valves used in conjunction with a single burner or to valves constructed tosupply gas to the simmer section o! a double gas burner either at a high rate or at a very low rate.

High-low valves have heretofore been' used on domestic gas ranges having single section burners. Valves oi' this type which are now in use are generally constructed with a` low adjustment which will restrict the` heat'production of the burner to approximately 1500 B. t. u. per hour. Many gas ranges are also equipped with double burners having main and simmer burner sections. The aas valves used with these burners arefeonstructed to supply gas to the simmer section only .or to both the main and simmer sections. It has heretofore been proposed to provide gas valves that are operable also to supply gas to the sim. mer burner section at a predetermined low rate suilicient to keep warm small quantities of liquid or food. The position ofthe valve when this small quantity of gas is supplied to the simmer burner is commonly known as the low simmer position.

In the low simmer position gas is supplied to the burner at a rate sumcient to produce 250 B. t. u. or even as little as 200 B. t. u. per hour. In view of different gas rates that may be desired and the variations in B. t. u. content oi gases, it is preferable to provide the valve with adjusting means for varying the rate of ilow oi the gas. Ordinarily, little trouble is encountered with the high-low gas valves since the minimum ow is comparatively large, but considerable the gas at a rate oi approximately 250 B. t. u.

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A further object oi the present invention is to provide a gas valve with means Kor adjusting the quantity of gas supplied to a burner that isl equally eiieetive when gas is to be supplied at a rate sumcient to provide i500 B. t. u. per hour as at a rate to provide as little as about 250 B. t. u. per hour.

A further object o! the invention is the pro-y vision oi a new and improved low adjustment means for restricting the ilow oi gas through a valve provided with means to take up looseness and prevent play between the parts thereof, thereby insuring a constant iiow of gas through the low adjustment means ,at any particular position oi' adjustment.

A further object oi' the invention is the provision oi anew and improvedlow adjustment means for a valve oi the high-low type which is of simple, durable construction, inexpensive to manufacture. yet capable oi' minute and accurate adjustment.

A further object oi the invention is the provi- A sion oi' a new and improved low adjustment means for a gas valve for controlling the now of small quantities oi gas which is so constructed that the danger ot clogsint is eliminated.

dimcuuy has been encountered in restricting the 40 now oi' gas to provide but 250 B. t. u. per hour, particularly when high B. t. u. content bottled gas is used. When this type of gas is used. the low adjustment valve has to be adjusted to'provide an opening having an area as small as .000026 square inch.

. The primary object oi the present invention is to provide a gas valve with new and improved means for regulating the quantity of gas supplied to s. burner.

VAnother object of this invention is to provide a gas valve with adjusting means capable ot satisfactorily regulating the ilow of high B. t. u. gas

Other objects and advantages oi the present invention will become apparent from the ensuing description, in the course oi' which reference is had to the accompanying drawing. in which:

Flg.1isanenlargedtopplanviewoiasas valve embodying the present invention;

Fig. 2 is'a cross-sectional view taken on the line I-I oi Fig. 1 but with the valve in low simmer position and illustrating the details oi' construction oi' the low adjustment means of the present invention and Fig.3isaviewsimilartoll'ig.2showing the details of construction of a modined form 'of the low adjustment means.

Referring now to the drawing and more particularly to Figs. 1 and 2. `it may be seen that the gas valve. which is indicated generally by reference character Il, -isa double gas valve adapted i'or use with double gas burners. It comprises s. valve body i2 within which is mounted a rotatable control member illustrated as a tapered plug i6. The plus is provided with an axial passageway Il providing communication between the interior of the valve plug and a chamber Il, within which the plug is mounted. The plug is provided also with a pair oi main to an amount which will provide the burner with 66 radially disposed passageways'il and Il located proper flow of gas in certain positions of the valve plug.

The particular construction and arrangement of the plug and passageways referred toV hereinafter form no part of the present invention, this being disclosed and claimed in the application oi Philip S. Harper, Gas valves, tiled contemporaneously herewith. \The valve plug is Y itatable by a handle 24 secured to a valve stem 26 formed integrally with the plug. The valve has associated with ita movement restricting and position indicating washer or detent plate 28 surrounding and movable by the valve stem and cooperating with a plurality of projections 30 (only one of which is shown) extending linwardly from a plate 32 also surrounding the valve stem but nxedly secured to the valve body. Plate 28 is urged toward plate 32 by a spring 84 surrounding the valve stemv and also urging the valve plug into its seat. The particular construction and arrangement of these plates form no part oi the present invention, the construction being disclosed and claimed in the application of Turner et al., Gas valves, led contemporaneously herewith.

The valve body is provided with a main gas inlet passageway 36 formed in a boss' 38 as by a drilling operation. The boss is exteriorly threaded for attachment to the usual gas supply manifold, not shown. The valve body is also provided with a pair of axially extending, spaced-apart, exteriorly threaded bosses and 42 that are drilled to form gas outlet passageways 44 and 46 through which gas lis supplied to the simmer and main burner sections, respectively, of a double gas burner, not shown. Passageway 44 communicatesdirectly with chamber I1 and therethrough with axial passageway I6 of the valve plug, as shown in Fig. l, and passageway 416 communicates with the plug surface at a point approximately 90 from the inlet passageway 36 comparatively large size and that passageway 66 is of substantial length, so that the likelihood of clogging of these passageways is practically eliminated.

The insert 56 is provided with a reduced end -portion 10 whereby it, with the bore in boss 58, provide an annular chamber 12 communicating with passageway 64. Communication between this annular passageway and the interior of the insert is provided by -a small passageway 14 disposed radially relative to the common axis oi the needle valve and insert. Communication' between the interior of the insert and the passageway 65 is provided by a second small passageway 16 in axial alignment with the conical end 18 o! the needle valve. The inner ends of the needle valve and of the interior of the insert are made smooth and to iit closely iii order to avoid binding and to obtain smooth action when the needle valve is moved in or out to adjusted positions. The inner end of insert 56 is chamfered, as indicated by reference character 80, to provide a sharp edge for seating against the inner end 82 of the bore within boss 58 so that when the insert is threaded into place, the annular chamber 12 is effectively sealed from passageway 66. In order that the insert may be readily threaded into place, it is provided with a slot 84 at its outer end.

The needle valve 54 has a thumb screw 86 at its outer end so that it may be readily turned when the valve is being assembled or adjusted. In order to prevent any play between the needle valve and insert and in order to make certain the valve remains in adjusted positions, there is provided a compression spring 88 abutting against the adjacent ends of the insert and thumb screw. i

In the embodiment of the invention just described, the regulation of the amount of gas flowing through the low adjustment means is I effected by moving the conical end 18 of the through aT passageway 48 drilled into s. boss 50,

also formed integrally with the valve body but closed as by a plug 5l. Adjustably mounted hoods 62, provided with orifices and cooperating with fixed needle valves secured to the valve body, not shown but of conventional construction, are secured to the outer ends of bosses 40 and 42 to provide nozzles through which gas is supplied to the burners at suitable velocities when the valve is in its full on position.

ig illustrated in 1113.2, a predetermined small f-(iuantity of gas ilows from the inlet passageway 38 to the simmer section of the burner through a by-,pass comprising a passageway 64 leading groin the inlet passageway 86 to the low adjuste'ment means. and a passageway 66 leading. from the latter to the valve surface. It may be noted from Fig. 2 that passageways 64 and 86 are (of needle valve relative to the passageway 16 formed at the inner end of the insert. The advantages of the invention may, however, be realized with other constructions, for instance, that illustrated in Fig. 3 wherein the inner end of the needle valve 54 is made `flat, as indicated by reference character 88, and wherein adjustment of the gas flow is obtained by moving the valve to uncover more or less of the passageway 14. Very line adjustments are obtained by moving the valve so that the passageway 14 is completely covered and the end 90 moved toward the inner end of the bore in the insert. In connection it may be mentioned that the clearance between the end of the valve and the interior of the insert is, as stated above, very small, but that in spite of the closeness of the nt some gas flows from passageway 14 to passageway 16 even when/the former is completely covered.

The valve illustrated in the drawing is operable from an off position to a plurality of operative positions, wherein gas is supplied to the main and simmer burner sections or to the simmerl burner section alone either at a rate determined by the adjustment of hood 52 at the end of passageway 44 or at a rate determined by the setting of the needle valve 54. In so far as the present invention is concerned, it is not deemed necessary to describe the various operative positions other than the low simmer position indicated in Figs. 2 and 3, at which time the low adjustment means is eilective. At this time gas ows through the .inlet passageway 36 to the simmer burner section through passageway v64, annular chamber 12,

passageway 14, the interior o! the insert entirely by moving it inward to seal passage- 'Ihe low adjustment means of the present invention is easy to construct and may be adjusted readily. In addition, the construction is such as to` provide accurate regulation of the ilow of against said shoulder 'to seal said one passagewayy from the other and having an axial passageway of a diameter less than said one passmall quantities of gas. This results from the fact that it is a relatively simple matter to provide the desired dimensional accuracy of the relatively movable parts of the low adjustment, that is, the insert and needle valve. 'Ihese parts may both be made with close dimensional accuracy at low cost as on a screw machine. This is not the case with prior art low adjustment means wherein the movable valve portion is rotatably mounted in threads formed in the valvebody It should be understood that thc principles of the present invention may be utilized in connection with valves of diii'erent forms, size and construction, and that while the invention has been described in conjunction with certain pre- Y (erred embodiments, these are deemed only to be illustrative.

What we claim as new and desire to secure by United. States Letters Patent is:

l. In a gas valve of the type comprising a valvebody, a gas inlet passageway having a portion ot substantial cross section area opening into a portion of relatively small cross section area, a shoulder formed by the Junction oi said portions, a gas llow adjusting mechanism including in combination, a member iixedly mounted in the larger portion oi' said passageway having a portion ot a cross section area less than the larger portion of said eway, and greater than the smaller portion oi said passageway and in contact with said shoulder whereby the latter portion is sealed from the larger portion, and deilning therewith a chamber, said member havingan opening therein coaxially disposed relative to said passageway and a passageway transverse to the axis o! said opening connecting said opening with said chamber and a second passageway coaxially disposed relative to said opening and connecting said opening with the smaller portion of said passageway, and a second member ntting closely in said opening and movable therein to vary the now of gas through said iirst member.- A

2. In a gas valve of the type comprising a valve body, a gas inlet passageway including a pair o! relatively small diameter passageways ,communicating with a relatively large diameter opposite end reduced to a diameter intermediate that of the said opening and said one passageway, said insert being mounted in said opensageway providing communication between the interior of said insert and said one passageway,

saidI insert having also a passageway extending through a sidewall 4thereof at the unthreaded reduced diameter end, and a valve member threaded at its outer end mounted in the threadedendofsaidinsertand havinganunthreaded inner end closely iitting within said tubular member, whereby said valve member maybe moved axially o! said insert to vary the ilow o! gas through said insert.

.3. In a gas valve oi the type comprising a valve body, a gas inlet passageway including a pair oi' relatively small diameter passageways communicating with a relatively large diameter opening threadedv at one end, one o! said passageways-being coaxial with respect to said opening and located at the unthreaded end oi' said opening, a shoulder formed by the junction oi.' said opening and said one passageway, and the other passageway communicating with the u nthreaded portion of said opening near the shoul-` 4 der, a gas ilow adjusting mechanism including in combination, a tubular insert internally and externally threaded at one end and having its opposite end reduced to a diameter intermediate that oi' the said opening and said one passageway. said insert being mounted in said opening with its reduced diameter end abutting against said shoulder to seal said one passageway from the other and having an axial passageway of a diameter less than said one passageway providing communication between the interior oi said insert and said one passageway, the inner end of said axial passageway defining a valve seat, said insert having also a passageway extending through a lsidewall thereof at the unthreaded reduced diameter end, and a valve member threaded at its outer end mounted in the threaded end of said insert, said valve member having an unthreaded inner end closely iltting within said tubular member and terminating in a conical end, whereby said valve member may be moved axially of said insert to adjust the position o! the conical end relative to said axial passageway and thereby vary the now of gas through said insert.

4. In a gas valve of the type comprising a valve body, a gas inlet passageway including a pair o! relatively small diameter passageways communicating with a relatively large diameter opening threaded at one end, one of said passageways being coaxial with respect to said opening and located at the unthreaded end of said opening, a shoulder formed by the junction oi' said opening and said one passageway, and the other passageway communicating with the unthreaded portion of said opening near the shoulder, a gas flow adjusting mechanism including in combination, a tubular insert internally and externally threaded at one end and having its opposite end reduced to a diameter. intermediate that of the said opening and said one passagei way, said insert being moimted in said 'opening .ing communication between the interioroi said insert and said one passageway, the inner end oi said axial passageway denning a valve seat, said insert having also a passageway l extending nu van :a reduced diameter end abutting l tnrougna siaewsu tumor si the unthreaded reduced diameter end, and a valve member threaded at its outer end mounted in the threaded end of said insert, said valve member having an unthreaded inner end closely fitting within said tubular member and terminating in an end cut oir at right angles to the axis of the member, whereby said valve member may be moved axially of said insert rst to vary the eiiective size of the passageway extending through the sidewall of the insert and then- `the eifective size of the axial passageway-in said insert.

f 'GEORGEF.'1UR.1-U?.R..v

'VINCENT C. PETERSON.

DONALD W. ROSS. v

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