US877908A - Reducing-valve. - Google Patents

Description

No. 877,908. PATENTED FEB. 4, 1988. G. W. COLLIN.

REDUGING VALVE.

APPLICATION FILED AUG. 8. 1907.

GEORGE W. COLLIN, OF MANSFIELD, OHIO.

REDUGING-VALVE No. avr/,90s.

Application tiled August 8. 1907. Serial To all whom it may concern:

Be it known that I, GEORGE W. COLLIN, a citizen of the UnitedStates, and resident of Mansfield, in the county of Richmond and State of Ohio, have invented certain new and useful Improvements in Reducing- Valves, of which the following is a speciiication.

.This 'invention refers to reducing valves and especially to steam pressure reducing valves and has for its purpose to generally improve existing types of valves, and more particularly to produce an improved type of steam pressure reducing valve which is especially applicable Jfor locomotive use and to obtain a simple construction of valve that will operate quickly, effectively and have perfect drainage. In the production of automatically operated valves of this sort employing a valve that is actuated by steam alone, I find it desirable to introduce the steam so as to evenly distribute its pressure against all sides of the valve to prevent'the same from binding and failing to operate. Also to locate the steam port from high pressure side of valve to auxiliary valve upon the introductory or inlet side of valve, and further to provide for the introduction of such steam at diii1 erent points or sides of the auxiliary vvalve chamber; and final-ly to provide such auxiliary valve with a pivotal stem connection to insure its perfect seating.

With the above and other minor objects in view, I have devised the simple and novel construction shown upon the accompanying sheet of drawings forming a part of this speciiication, upon whichl similar characters of reference denote like or corresponding parts throughout the several which,

Figure l, shows a central vertical longitudinal sectional view through one oi.l my improved valves complete. Fig. 2,is a transverse cross section taken online2-2 of Fig. 1. Fig. 3, is a cross section through auxiliary valve taken on line 3-3 of Fig. l. l

Referring in detail to the characters of reference marked upon the drawings A casing as a whole, which cast in one piece and bored, tapped and finished as required. The upper end portion of this casting coni represents the main `tains achamber that is inclosed by a detachable screw plug H1.'

B1 represents a double piston valve which Specicaton'of 'Letters Patent.

is mounted within a large piston D, it reci rocates and cham s D1 and nected with the steam inlet.

which fits Patented Feb. 4, reos.

thecasing., and comprises the bore in whichv divides the same into two I1, the latter being con- The valve G connectswith the piston D and serves toengage seat C1 tom of chamber I1. ber I1 is located which is providedwith a lport F that is adapted to be lower piston F1 surrounding the contained upon the port V in bot- Beneath the said cham- .a cushion chamber E1 ened and closed by the winged stem E of the valve.

, The steam is admitted to thechanrber I1 through the nipple A1, and against the s lit- 7 ter I located central of inlet which as wi l be seen is'designed to divide the impact of steam againstl the piston valve B1, thus insu-ring an even or balanced Through the s `the vertically oca figures, and of the chamber D1 to V1 the lower part divided as at W against 'the auxiliary valve The auxiliary valve chamber V1 operation of the same litter I, as I term it, passesl 7e ted port J1 leading hom auxiliary valve chamber of said ort being also to intro uce the steam from two sides.

is also inclosed by a removable cap O, which ma be detached for cleaning or repairs. A bus 'ng L1 contained within the valve chamber serves as a guide for the the small end W1 pivotally connected by in shown in detail Fig. 3.

slide rod'L and to which of auxiliary valve K is sans of a pin K2 as The larger stem M1 of valve is slidably mounted in bearings N and N2 of casing,

thel latter being a narrow bridge extending across the diaphragm chamber X which is thus consequently open into low pressure side mounted upon serves to hold the K1 of valve. the slide rod L intermediate of bushing L1 and auxiliary valve L obviously vA spring M latter closed against its seat when not opened by the larger sprlngQ permitted by reduced pressure in system.

The end of auxili center of diaphragm ary stem M1 contacts with N1 which is held in place 1.0.0

by a bonnet P screwed to the hub of casing.

This bonnet is tension Q1 whic diaphragm spring en of the said spring Q are provided with rovided with a tubular exforms an inclosure for the Q before mentioned; The

hubs P1 and R1 at opposite ends, the former to engage the dia enga ed by an cure in position The operation o hragm while the latter 'is a 3usting screw R to be seby lock nut S.

f my valve is as follows:

Steam is admitted through the inlet A1 which in practice is connected with boiler, and is divlded by the splitter I, to divide the impact of steam on valve in high pressure chamber I1. From there the steam escapes through port D2 of piston D to upper chamber D1 and from here to the port J1 when auxiliary chamber V1 is likewise iilled. The tendency of the steam pressure under these conditions is obviously to hold bpth the piston valve and auxiliaryivalve closed. Amanualoperation of' the screlWR tends to compress the spring Q, the diaphragmorcing the auxiliary valve K open allovving an escape of steam from chamber D1 through passage J1 and chamber V3, reducing the pressure in upper chamber D1 causing the pressure in chamber I1 to lift the piston valve from its seat thus allowing aifree flow of steam through the low resslire s ide of valve t`o system. When tiie system thus becomes filled to the 'pressure desired, the service systemvvill act upon the diaphragm and force the same out against `its spring,

leaving the auxiliary valve free to lclose,

shutting off the escape of steam from ,upper chamber D1 causing it to become Yfilled and the valve body to settle down upon its seat .and close the main passageA The valve thus remains closed until the system pressure becomes reduced whereupon the same operation is repeated, and so on, the valve repeats its operations from time to time and sustains the system pressure.

Having thus described my invention what .Iclai'm and desire to secure by Leters Patent 1s:-

1. In 'a valve of the class described, the combination with a casing having a steam` "chamber therein, a valve mounted in the casing and carrying a piston, a steam inlet 1n the side of the casing having a central transverse divisional Wall arranged there across to introduce the incoming steam from opposite sides against and intermediate the piston and valve.

l 2. Ina valve of the class described, the

combination with a casing having a high ressure chamber, a cushion chamber and 0W pressure chamber, combined pistoni valvej mounted in the casing and including a piston and port closing valves to operate intermediate the several chambers, a steam inlet inside of casing having a central divi-` siona'l wall to divide the steam and introduce,I it to high pressure chamber on opposite sides' of and intermediate of, piston and valvle, a port extcndingthrough the said Wall pressure chamber, a cushion chamber and louT pressure chamber, a combined piston and valve mounted in the casing and having a piston and port, closing valves to operate intermediate the several chambers, a steam inlet inside of easing having a central divisional wall to divide the steam and introduce it to high pressure chamber on opposite sides of and intermedi te of piston and valve, an auxiliary valve, a port extending through the said division-al Wall and connecting the high pressure chamber With auxiliary valve chamber and a diaphragm for'operating `said auxiliary valve. i

4. in a valve of the class described, the combination with a casing having a steam chamber therein, a double valve mounted in the casing and earryinga piston, a steam inlet provided with a transverse divisional Wall, and extended side ports Which enter the chamber opposite but central of the valve stem. in a Way to equalize the pressure thereagainst'. f

5. In a valve of the class described, the combination With a casing having high and low pressurechambers, a cushion chamber, a combined piston and double valve mounted in the casing, an auxiliary valve chamber, a port leading from high pressure chamber to auxiliary valve chamber, an auxiliary valve, a slide rod pivotally connected to Said auxiliary valve, a spring encircling the said rod and operating against the auxiliary valve, and a diaphragm to `manipulate the auxiliary valve against lthe action of the spring.

6. rin a valve ofthe class described, the combination with a casing having a steam chamber therein, a double valvemounted in the casing and carrying a piston, a steam inlet vprovided with 'a transverse divisional Wall,

an auxiliary valve adapted to open or close the main valve and a piston actuated diaphragm for operating the auxiliary valve.

. Signed at Mansfield, in the county of Richmond and State of Ohio, this 29th day of' July, A. D., 1907.

encuen W. eoLLiN.

Witnesses:

J. ROWLAND BROWN, l. J. KELLEY.

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