US1486677A - Valve - Google Patents

Description

March lll 1924. L??

H. W. oDoWD VALVE Filed Oct. l5. 3.9231

4,0 /7 ipa/L9 f kip, M/ "H 4Q rml 1 Q QH 3 ATTX Patented Mar. ll, i924.

l l traten raraar errata,

HENRY W. ODOWD, OF J CITY, NEW JERSEY, ASSIGNOR TU CRANE j COMPANY, A CORPQRATION F NEW YORK.

VALVE.

Application med October 15, 1921. Serial No. 507,935.

To all whom it may concern:

Be it known that HENRY W. ODOWD, a citizen of the United States, residing at J ersey City, county of Hudson, and State of a New Jersey, have invented certain new and useful Improvements in Valves, of which the following is a specification.

This invention relates to valves, and ha reference more particularly to the type of lo plug valve which is used to control the discharge of gas into the air chamber and the mixing chamber of the burners of gas stoves. Such valves embody usually a valve casing with a'passage through it terminating y lo in a discharge nozzle, for the flow of gas, in

which casing a valve is mounted to control the How through the passage. A cap is mounted on the end of the nozzle so that it can be adjusted axially thereon, and the cap 2o is provided with a discharge aperture and with. an internal tapered chamber, which latter inA the adjustments of the cap, cooperates with a projection or plug on the valve casin in controlling the discharge of the 2t gas t rough the aperture.- In theI use of the valve, the cap projects into an air chamber'v or casing havin openings for the ingress of air, which c amber leads to a mixing chamber which in turn leads to the burner. 3o rlhe stream of .gas issuing under pressure from the aperture in the cap, acts to entrain the air through the openings in the air chamber, and the mixed air or gas is projected through the mixing chamber and is thus supplied in proper proportions to the burner.

The aim of the present invention is to ininimize the friction-on the gas in its flow' through the cap, so that the gas will How ao with a maximum velocity and will issue from the discharge aperture at such speed and in such form as to operate with the most effective entraining action on the air, and with this and other objects in view the invention consists in an improved form of the plu or projection on the outer end of the disc arge nozzle, and in an improved relation of this plu to the chamber in the cap .which improve features will be fully described in the specification tofollow, and the novel parts set forth in the appended claims.

The invention consistsy also in the details of; construction and combination of parts hereinafter described and claimed.-

ing drawings:

yjusted to nearly closed position.

Fig 3 is an elevation of the end of the discharge nozzle with the cap removed.

Referring to the drawings:

The valve shown by way of example as embodying the present invention, consists of a valve casing l provided with oppositely extending aligned threaded nozzles 2 and 3 through which a continuous passage d extends or the How of the gas, the nozzle 2 being adapted to be connected with any suit able source of gas supply. A valve proper 5 is mounted in the casing and is formed as usual to be turned on its seat so as to control the How of the gas through the passage d.

A cap 6 is screwed onto the threaded nozzle 3 so that it can be adjusted axially thereof for the purpose resently to be described, and it is forme with an internal chamber 7 which taperstowardsthe outer end of the cap where it communicates with a discharge aperture 8 in the end of the cap. The wall ofthe chamber 7 is adapted to cooperate in the axial adjustments of the cap= with a member 9 projecting axially from the end of the nozzle 3 over the discharge end ot the passage therein, and by such cooperation acting to control the discharge ot the gas through the aperture in the cap. 'lihe member 9 in the resent instance is in the ilorm of a cylindrical plug having its outer end fiatand ydisposed in a planeat right angles to the axis oit the tapered chamber in the cap, the said plug extending axially from a bridge piece l0 on the end ot the nozzle, which bridge piece extends across the center of the .discharge end of the passage d Jso as to leave dischar e openings 4in-4f at the sides of the bridge piece. 'llhe gas from passage d will How outwardly laterally at its discharge end through the two passages j da-d and then around the bridge piece and plug and into the tapered chamber 7, and will nd its exit through the discharge aperture in the cap. Due to the cylindrical form of the plug with its dat end, when-the cap is screwed back on the nozzle 3, the plug will extend into the tapered chamber i110 titi lil@

in the cap and the annular space between the end of the plug and the Wall of the chamber will gradually contract until 1t 1s fully closed by the engagement of the wall of the chamber with the corner edge of the plug, whereby' the flow of gas will be checke When so engaged the plug w1ll contact wlth the Wall of the chamber in a single clrcumferentialline. Due to this form' and relation of the parts, the gas will be subjected to a minimum of friction in its passage between the plug and interior of the cap, it being observed that the longitudinal surface of the plug and longitudinal surface of the wall of the chamber in the cap, will form an angle with each other and consequently the gas will not be subjected in its flow to undue friction which would `result if these surfaces were parallel to each other as is characteristic of constructions wherein the plug is in the form of a needle or tapered to correspond to the tapered chamber. In such cases the as, as the assage is more and more constricted by the Increasing penetration of thetapered plug into the tapered chamber in the adjustments of the cap, is compelled to pursue an extended course between the arallel surfaces and is consequently subJected to a great amount of fric.- tion, which retards its speed. In-the construction illustrated, the gas in passing between the plug and wall of the chamber 1s subjected to friction only at a single line coincident with the outer end of the plu and consequently the speed of the gas wil not be materially lessened and it will issue from the discharge aperture in the cap at a maximum speed and under the most favorable conditions to effectively entrain the air into the air chamber of the burner.

While in the drawingsvthe plug is shown as of cylindrical form, it will be understood that it may be given other forms without departing from the limits of the invention, the essence of the invention in this respect residing in such a relative form of the plug and chamber in the cap that the annular passage between the plug and the cap at the point of greatest restriction, will be confined to a circumferential line or limited area.

In the use of the device the cap projects into the usual casing 11 of the air chamber, which casin is provided with openings 12 through which the air is entrained b-y the stream of gas flowing from the discharge aperture in the cap, the latter being formed at its inner end with a hexagonal or other form of head for screwing the same on the nozzle and thereby effecting its axial adjustment. In the action of the device, the gas flowing along the opposite sides of the brid e piece and between the angularly relate longitudinal surfaces ofthe lug and the tapered chamber, will unite in t e chamber beyond the outer end of the plug and will issue at high velocity from the discharge aperture in the ca in acolumn of rod-like cylindrical form w ich is most favorable for the effective entraining of the air, there being no tendency ofthe gas in its issuance from the aperture to spread into a conical or fan-like form and thereby interfere with its entraining action.

In the accompanying drawings and foreoing description t e invention has been set forth in the particular detailed form which has been found in practice to answer to a satisfactory degree the ends to be attained,

but it will be understood that these details- 1. In combination with a valve casing.

having a passage therethrough provided with a vdischarge end, a valvevmounted in said casing to control the flow of -luid through the passage, a cap applied to the casing over the discharge end of the passage and adjustable axially of the passage,

said cap being formed with a discharge aperture and with a chamber tapering towards said aperture, and a plug on the casing at the discharge end of said passage provided with a Hat end disposed in'a plane atright angles to the axis of the passage, said end of the plug being adapted in the adjustments of the cap, to cooperate with the tapered chamber in controlling the discharge of the Huid through the aperture.

2. In combination with a valve easing havin ,a passage therthrough provided with a disc arge end, a valve mounted inthe casing to control the flow of fluid through said passage, a cap applied to the casing over the discharge end of the passage and adjustable axlally of the passage, said cap being formed with a discharge aperture and with a chamber tapering towards the aperture, and a cylindrical plu on the casing at the discharge end o? the passage, adapted in the adjustments of the cap to cooperate with the tapered chamber in controlling the discharge of thelluid through the aperture.

' 3. In combination with a valve casing having a passage therethrough provided with a discharge end, a valve mounted in said casing to control the iow of fluid through the passage, a cap applied to the casing over the discharge end of the passage and adjustable axially of the passage, said cap being formed with a discharge aperture and with a chamber taperrasee?? ing towards said aperture, a bridge piecel on the casing extending across the center of the passage at its discharge end, thereby leaving discharge openings for the fluid at the opposite sides of the bridge piece, and a plug extending axially from the bridge piece and adapted in the adjustments of the cap to cooperate with the tapered chamber in controlling the discharge of the Huid through the aperture, the longitudinal surfaces of the plug and chamber bein disposed in angular relations to each ot er.

4. In combination with a valve casin having a vpassage therethrough provide with a dischargeend, a valve mounted in said casing to control the flow of fluid through the passage, a cap applied to the casing-over the discharge end of the passage, and adjustable axiallyA or the passage, said cap being formed with a discharge aperture and with a chamber tapering towards the aperture, and a cylindrical plug on the casing at the discharge end of the passage provided with a iiat end disposed in a plane at right angles to the axis of the passage, said flat end of the plug being adapted in the adjustments of the cap,

to cooperate with the tapered chamber in controlling the discharge of the duid through the aperture. Y

`5. ln combination withavalve casing havin a passage therethrough provided with a ischarge end, a valve mounted in the casing to control the low of uid through the passage, a cap applied to the casing over the discharge end of the passage and adjustable axially', said cap being formed with a discharge aperture and with a chamber whose walls converge towards said aperture, and a member on the casin rojecting axially from the discharge endg ol) the passage and having its terminal end formed with a circumferential edge portion adapted to cooperate with the converging walls of the chamber in forming a circular constricted passage between the two, the relation of said circumferential edge portion to the converging walls being such that in the adjustment of the cap said circumferential edge portion will engage the converging walls 1n a circumferential line of Contact.

lln testimony whereof, ll have aixed my signature hereto.

HENRY W. DOVVD.

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