US893911A - Reversible cut-out valve for steam boilers and pipes. - Google Patents

Description

PATENTED JULY 21, 1908.

. J. ERWOOD. REVERSIBLE GUT-OUT VALVE FOR STEAM BOILERS AND P IPES'.

APPLICATION FILED AUG. 31. 1907.

' i mi l I mill JOHN ERWOOD, OF CHICAGO, ILLINOIS.

REVERSIBLE CUT-OUT VALVE FOR STEAM BOILERS AND PIPES.

Specification of Letters Patent.

Patented July 21, 1908.

Application filed August 31, 1907. Serial No. 390,899.

To all whom it may concern: I

Be it known that I, JOHN ERWOOD, a citizen of the United States, residing in Chicago, in the county of Cook, in the State of Illinois, have invented certain new and useful Improvements in Reversible Cut-Out- Valves for Steam Boilers and. Pipes, of which the following is a specification.

This invention relates to automatic cutout valves intended to prevent a current of steam, gas, or liquid attaining an unrestricted velocity in either direction through a pipe on which it is placed; or to enable a current to pass through it at a desired and u fixed velocity in but one direction of either,

as the operative may desire and so adjust; and at the same time prevent a return of the current in the direction of its source of supply. I employ the term reversible in this connection to refer to a valve whose functions of permitting a current to pass through it at a governed velocity in but one direction can be reversed in either direction at the will of the o erative, without dismemberment of the va ve and by simple and immediate adjustment.

Figure 1 is a longitudinal sectional elevation of the valve body containing my inven tion, and also a side elevation of the operating levers and spring. Fig. 2 is a cross-section at 2. 2 of Fig. 1.

In the drawings, A'is a valve body fitted with a cover (B).

C and C are two opposed and renewable valve-seats set securely in body (A).

D. D are two oscillating cross shafts, on which valves E and E are suspended; said shafts assing out through the side of the body (X) by means of a stufling-box and a gland for each, as at F (Fig. 2).

G. G-are levers fixed to the shafts (D. D)

' by means of which the position of the valves are set in relationto each other, and with respect to the desired amount of lift given to the open valve.

H is an adjusting rod, susceptible to variation in its length while in action, and fixed and flexibly jointed to levers (G. G), by

means of adjustable set collars (I. I).

J. J are similar set collars also connecting levers (G. G), together by means of a spring (K) and exerting a tension thereon.

L is a cored by-pass around one of the valves, and controlled by auxiliary valve (M).

In the drawings the osition of valves is shown with E closed tiglitly on its seat, and

E thrown open. It will be noted that the length of the adjusting rod (H) determines.

the distance valve (E is raised off its seat, while the position of spring (K) tends to keep valve (E) closed, this tension being govvalves would swing open equally, while reversing the angularity of the spring from that shown in the drawings will also reverse the osition of the valves and set them as shown by the dotted lines, thus making them automatic in either direction by simply changing the position of the spring by sliding the set collars (J.-J) up or down levers (G. G). It will be seen that as valve (E) is forced open by the current passing through it, it in turn closes valve (E and in a like proportion until it is completely closed as indicated by the dotted lines, the valve action, therefore, becomes automatic. An excessive volume passing through valve (IE) will so engage valve (E in the traveling current assing around it that it will force it shut and :eep it there until the pressure is removed, at which time the spring (K) will, by its tension, throw the valves back into their original position.

It will be observed that the adjusting rod (H) can be so shortened as to throw the valves apart, in closer proximity to both faces, and so limit the amount of opening, and conse uently the current that Wlll pass through, w ile lengthening the adjusting rod will have a reverse effect. I

The aperture at the bottom of the valve casing is used for draining the casing of condensation, in a vertical position it is plugged, and in a horizontal position it is fitted with a drain pipe, to remove the entrained water of condensation lod ing in the valve casing, and is consequently c osed in the operation of the valve.

Having thus described my invention, what I claim as new therein, and desire Letters Patent thereon, is 4 1. The combination with the valve body fitted with two opposing seats, of two hinged valves set back to back and attached to two oscillatingshafts, said shafts oscillating in I 2. The combination with a valve body fitted with two seats of two hinged valves attached to two shafts and fitted with levers,

the position of the levers governed by means of a rod of variable length, pivoted upon ad justable collars and means to fix the collars in any desired position on the levers, substantially as described.

3. The combination with a valve body, fitted with two seats, of two valves, and means of attaching said valves to oscillating shafts, said shafts fitted with levers and means for adjusting and fixing the position of the levers and valves in relation to each 15' other; and an adjustablespring suspended between and attached to said levers by means of sliding collars, substantially as de scribed.

4. The combination with a valve body'fitted with two seats, of two valve faces attached to the oscillating shafts fitted with levers; means for connecting the shafts together and counterpoising the mechanism in a desired direction; and a by-pass connecting the cavity between the valves with the discharge or inlet side of the valve, substantially as described.

JOHN ERWOOD.

Witnesses EDWARD O. WENTWORTH, HENRY S. MERRILL.

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