US399565A

US399565A - bueff

Info

Publication number: US399565A
Authority: US
Publication date: 1889-03-12
Anticipated expiration: 1906-03-12

Description

I (No Model.)

B. RUEFP, PRESSURE REGULATING STOP 000K.

No. 399,565. A. Patented Mar. 12, 1889.

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EMIL RUEFF, OF NE\V YORK, N. Y.

PRESSURE-REGULATING STOP-COCK.

SPECIFICATION forming part of Letters Patent No. 399,565, dated March 12, 1889.

Application filed May 24,1888. Serial No. 274,902 (No model.)

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Be it known that I, ICMIL RUEFF, a subject of the King of Bavaria, residing at New York, in the county and State of New York, have invented new and useful Improvements in I ressuire-Regulating Stop-( ocks, of which the :t'ollowin g is a specification.

My invention relates to a pressure-regulating stopcock which is (specially intended for use .in dealing with fluids under a very high pressure-such, for instance, as liquid carbonic acid.

The object of myinvention is, iirst, to provide a perfectly-tight cock without the use of the ordinary stui'ii ng-box aboutthe exit of the valve stem from the easin g, such stu'iiingboxes invariably causin trouble by leakage when lluids under a very high pressure are passed through the stop-cock; secondly, my object is to cause the stop-cock to regulate the pressure of the fluid passing theretlnough.

The peculia r and novel construction whereby the above-stated object is aceomplislled is more fully pointed out in the following specification and claim, and illustrated in the accompanying drawings, in which- Figure 1 represents a longitudinal. section of a stop-cock constructed according to my invention. Fig. 2 is a transverse section thereof in the plane .1, 117-, Fig. l.

Similarletters indicate correspondingparts.

In the drawings, the letter A designates the upper section of the casing of my stop-cock. I is the lower section, which is provided at one end with a screw-ni mle, o, by means of which it can be connected with the flask C, which contains the liquid. carbonic acid. or other fluid under a high pressure. A screwsoeket at the upper end of the section B engages with a screw-thread, Z, at the lower end of the section A, whereby the two sectionsare united.

In the casing A B is formed the usual. receiving-channel, c, and the delivery-channel. (Z, through which. the fluid contained. in the flask 0 passes for distrilimtion.

D is the valve, which is located in the re ceiving-ehannel. c and can be moved toward and from a seat, It, fori'ned in the lower end of the section A. In the example shown in the drawings the seat is made, by preference,

hard, of vulcanized rubber, and in the form of a ring,which is set into a circular recess in the end of the section A. A suitable metallic packing-ring, d, placed in a recess in the top of the casing-section l3, bites into the ma terial of the seat E when the two sections are united and forms a perfectly tight joint, whereby leakage below the valve D is prevented.

The valve-stem 1?, attached to the valve 1), is extended upward through the casing, and in the length of the same is secured, by any suitable means, a diaphragm, G, the edge of which is secured air-tight to a suitable flange, c, on the easing-section A.

In the example shown in the drawings the diaphragm is made of soft rubber, so as to be flexible; but it may be made of sheet metal or any other suitable material. To secure it air-tight and firmly to the section A, its edges are clamped bet-ween the flange c of the same and a flanged cover, B.

The exterior portion of the valve-stem F issubjected to the action of a spiral spring, II, which is located between a shoulder, 71, on the stem and an adjusting-screw, I, which is provided with a thread engaging an internal thread in the cover 13'. By turning the screw I, the tension of the spring II on the valvestem, and consequently on the diaphragm G, can be regulated.

The exterior portion of the valve-stem is provided with a screw-thread, f, which is engaged by a hand-wheel or nut, J, resting on the top of the cover. It is evident that instead of having the spring II in engagement with the valve-stein it could be made to engage directly with the diaphragm.

It will be noticed that by turning the handwheel or nut J in one direction the valveD is moved toward its seat E and closed by the action of the screw-thread on the valve-stein F and the screw-thread in the nut or handwhecl. If the hand-wheel or nut is moved in the opposite direction the spring II forces the valve-stem downward, and consequently opens the valve.

The actionv of the diaphragm and spring G, as in ordin ary p ressu re-reducing valves, serves to close the valve when the pressure on the inside of the diaphragm that is in the lowpressure chamber L becomes greater than the pressure of the spring H on said diaphragm, and to open the said valve when the pressure again falls below the tension of the spring.

It is evident that other mechanism can be substituted in place of the hand-wheel or nut and the screw-thread for moving the valve spindle. To prevent particles of dirt or metal from entering the interior of the casing and interfering with the action of the valve D, a suitable screen, K, is formed on the lower end of the casing-section B, such screen being best in the form of a nozzle closed at its lower end and provided with perforations.

It will be readily seen that by properly securing the edges of the diaphragm G to the casing leakage cannot take place about the diaphragm, even at the excessive pressure met with in dealing with liquid carbonic acid, and consequently by using such a diaphragm in place of the usual stuffing-box for the valvestem a great advantage is gained, while at the same time the construction of the cock is simplified;

What I claim as new, and desire to secure by Letters Patent, is

The combination of the casing having the vertical receiving-channel c and the lateral delivery-channel d, the valve-seat E, located between said receiving and delivery channels,

the valve D, arranged in the casing and closing upwardly upon the valve-seat with the pressure of the fluid, and having a valve-stem, F, rising through the valve-seat and extending to the outside of the casing at the upper end thereof, alow-pressure chamber, L, in the casing above the lateral delivery-channel, a flexible diaphragm, G, closing the casing at the low-pressure chamber secured to the valvestem, and by its rising movement under the fluid-pressure lifting and closing the valve upon its seat,a spring, H, located in the valvestem and pressing upon the diaphragm to force it downward and thereby lower and open the valve, and against the pressure of which spring the valve closes on its seat, a wheel, J, outside the casing for lifting and closing the valve-stem against the pressure of the spring, the internally-screw-threaded cover B, and the tubular screw-nut I, adjustable in the cover, pressing on the upper end of the spring and through which nut and spring the valvestem passes to the hand-wheel, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses. EMIL RUEFF. [L. s.]

Witnesses:

W. C. HAUFF, E. F. KASTENHUBER.