US533864A - Pressure-regulator - Google Patents

Description

(No Model.)

J. DE G. RRASSINGTON.

, PRESSURE REGULATOR.

Patented Feb. 12, 1895.

' INVENT. @I6/@ml WITNESSES :Y

' UNITED STATES PATENT OFFICE.

JOHN DE GROAT BRASSINGTON, OF PORT RICHMOND, NEW YORK.

4PREssuRIE-RecoLAT-0R,

sPEcIFIcATIoN forming perfor Leners Patent No. 533,864, rated February 12, 1895.

Application filled March 25, 1 892. Serial No. 426,334. (No model.) I

To allwhom it may concern: t

' Be it known that I, JOHN DE GEOAT BRAss- INGTON, a citizen of the United States, residing in Port Richmond, yin the county of Richmond and Statefof New York, have invented certain new and useful Improvements in Pressure-Regulators, of whichthe following is aspecitication.

`This invention relates to `pressure regulators of,the class having ingress and egress passages v and a valve automatically controlling communication, between said passages actuated automatically by the pressure at the egress side of the regulator.

My invention aims to provide an improved regulator acting on this principle which will be simple of construction, which will operateV freely-and with the minimum of friction'al retardatiomand which can be adjusted to remain entirely open until 'amaximum egress pressure is reached, and which will not chatter. in use. f t

To this end in carrying out my invention I provide certain improvements in the construction andarrangement of such regulators wh ich will be hereinafter fully set forth.

In the accompanying drawings, Figure lis an axial section of a pressure regulator con-x structed according to the preferred form of my invention. Fig. 2 is a separate plan view of the compression spring, and Fig. 3 isa plan View of the spring used for opening the valve in this instance.

Referring to the drawings let A indicate the valve shell; B, the ingress passage thereof; C, the egress passage; D, the valve as a whole; E, the piston; F, the cylinder therefor; I, the conduit between the egress passage and cylinder; J, the auxiliary Valve chamber; K, the auxiliary valve therein; L, the stem of the latter; M, its spring; N, its adjusting handle, and O the cap closing the top of chamber J Aand through which the stem w operates.

The shell Amay be of any suitable or convenient construction, but I prefer to construct it as shown as a single integral casting. Preferably itis constructed with a projecting valve 1 seat a, betweentheingress and'egress passages., thisaseatibeing here. shown as tapered, and axially above said seat with a cylindrical guiding chamber band thereabove with an enlarged cylinder F'into which said chamber b opens, a shoulder c intervening between the cylinder and chamber. The duct I, preferably consists of a vertical conduit d rising from thepassage C to the auxiliary chamber J, and a horizontal passage e communicating between the latter and the cylinder F. The

The sh'ell A is cast in one integral piece by 65 providing a core .corresponding to the interiors of the passages B and C, guiding chamber b, cylinder F, ducts e and d, and valve chamber J. This Icore can be conveniently formed in one piece, and its ends can projectfor support in the' mold beyond the end of the valve chamber J, cylinder F and passages B and C. By disposing the duct d and valve chamber J in .the same axial plane, on substantially the same axis, and the cylinder F andiguiding chamber b on the same axis and parallel with that of the duct and valve charnber, vthis coring `is rendered simple and convenientJ The valve D and the piston E may each be of any desired construction and may be connected together in such manner as conven- Preferably the valve is sub- Y ience dictates. stantially balanced, and is constructed with a head f having a tapered seating end g, fitting the'seat-ct, a reduced middle portion withinthe passage B, and a cylindrical packed portion h, fitted to slide in and be guided by the guiding chamber b. Preferably the vvalve is constructed to seat im passably against the seat d and to move axially away therefrom in opening. It is packed at its upper end, preferably by a packing ring z', with suflicient tightness to prevent leaking at this end, but in such manner as to reduce to the minimum frictional retardation of its movement in the chamber b.

The piston E is preferably constructed with IOC) joint. Preferably the piston and valve are connected together by a stem Q shown as formed integrally with the disk 7o, depending therefrom into the chamber b and having a head n, clamped to the valve head f byabolt p in such manner as toA secure the packing ring t' between the portion 7L of the valve head and the head n.

Any suitable or convenient means may be provided for giving the valve a normal tendency to open. I prefer to employ the leaf spring R, which in the construction shown is a four armed spring, having a central aperture q, embracing the stem Q, and bearing at its center against the disk 7a, and at its extremities against the shoulder c, the spring acting when expanded to ,force the piston and valve away from the valve seat.

Preferably an orifice S through the shell A affords communication between the exterior and the interior of the cylinder F below the piston E. This orifice constitutes a duct whereby atmospheric communication is afforded to prevent abnormal pressure beneath the piston as it descends, or vacuum as it rises.

According to the construction described the valve D will normally stand open, permitting iiow through ingress passage B to egress passage C, and the pressure in the latter will rise through duct I, and act in cylinderF against piston E, tending to close the valve against the spring R. As the egress pressure increases the valve will be forced toward its seat and at the predetermined limitof egress pressure the valve will be tightly seated against this seat by reason of the pressure against the piston E overcoming the resistance of the spring R. As the pressure falls at the egress side the spring will again open the valve.

I will now describe my improved auxiliary valve. The function of this is to control the operation of the main valve B, to maintain it completely open until the egress pressure ar rives at a predetermined limit, and also where the regulator is to be thrown `out of operation as such, to cut olic communication between the egress passage and the piston, whereupon the valve will be balanced and maintained open by the provision tending normally to open it.

Preferably the auxiliary valve in action operates automatically as heretofore to close communication between the egress passage and the piston until a certain limit of egress pressure is reached, whereupon it automatically opens, andthe pressure rushing into the cylinder F acts against the piston E and closes the valve D quickly.

In the'construction shown, the auxiliary valve K is a piston valve constructed with a head r, surrounded by a packing ring s and working vertically in the auxiliary valve chamber J, operating as it passes the duct e to close the latter and thereby interrupt communication through the conduit I. Preferably the valve K is constructed with a disk t clamped against the head o by a bolt u, and serving to secure the packing ring s in place. Preferably the valve K has a stem L for guiding it, that shown being a cylindrical stem entering a recess T in the handle N, guided thereby,andilimited in its outward movement by abutting against the end u of such recess, which thereby serves as a stop.

vPreferably the valve K isa spring actuated valve. In the construction shown a spring M mounted above the valve within the chamber J tends to force the valve downward against the egress pressure and thereby to seat it. The construction of spring shown is that I prefer to use. It preferably consists of separate elastic leaf like pieces U U, and interposed inelastic disks V V. AThe piecesU are shown asmm constructed with four arms, and these pieces and the pieces V are each provided With central perforations fu. All the pieces of the spring are separate and independent, whereby it can readily be repaired by substituting a perfect for an imperfect piece and its length can be altered by adding to or removing the requisite number of pieces.

In the construction shown the pieces of the spring M are passed over the stem L of the valve with their central perforations v embracing the latter.

The regulating handle N is constructed to be adjustable toward and from the valve to adjust the position of the latter and to control its operating tension. Preferably the stem w of the handle is screw threaded, passing through a screw threaded aperture in the cap O and its end a: bears against the spring M whereby as the handle is adjusted, it compresses or expands the spring to increase or diminish its tension on the valve. When the handle is screwed inwardly its stop u by abutting against the stem L forces the valve closed and prevents its opening until readjusted, thereby entirely disconnecting the cylinder F and piston E from the egress passage, whereupon the regulator ceases to act as such, and even pressure exists in both passages, the valve D remaining open under tension of its spring R.

In operation the handle of the auxiliary valve will be adjusted so that the latter will remain closed until a predetermined limit of egress pressure is reached. Until this time the piston E and Valve D will be open and removed from the action of the egress pressure. As soon as the auxiliary valve opens the egress pressure will act against the piston E, to con trol the valve D, and if stronger thanthe tension of the spring Rwill quickly close the latter without intermediate oscillation thereof.

It will be seen that my invention provides an improved pressure regulator which can be readily thrown into or out of action and conveniently controlled, which is simple in construction, and in which there is but two packed surfaces affording frictional retardation to the operation of the valve, and which will not chatter.

IOO

IIO

It will be understood that my invention is not limited to the eXact adaptation or construction described and shown, and that it may be variously applied and moditied'as cirl egress passage C and the outer end of'said cylinder, in combination with valve D fitting said cylindrical guiding chamber, constructed with seating end g for engaging said seat, a reduced niddle portion above said end and opposite the ingress passage, cylindrical porl tion h above said passage, and the piston E in said cylinder. constructed with depending stem Q entering said guiding chamber and carrying at its lower end head nclamped to said valve by screwvp, all substantially'as and for the purpose set forth. p

2. VIn a pressure regulator, the combination with the integral shell A having ingress passage B, egress passage C, valve seat a, cylin- Vcap' O, and acting against said spring to control its tension, and having recess T in its der F, duct d communicating with said egress passage, valve chamber J at top of said duct, duct e between said valve chamber and said cylinder, and guiding chamber b beneath said cylinder, valve D in said guiding chamber for controlling communication through the regulator, piston E in said cylinder for controlling said valve under the egress pressure, valve K in said valve chamber for controlling communication through said ducts to said cylinder, upwardly extending stem L for said valve K, a spring, as M, surrounding said stem, inclosed in said valve chamber and acting. tomove said valve against the egress pressure, cap O, closing the top of said valve chamber, and `handle N for controlling said valve K, constructed with exteriorly screwthreaded stem'wadjustably traversing said end engaging the end of said valve stem L, all constructed substantially as and for the 'purpose setY forth.

JOHN DE GROAI BRASSINGTON,

Witnesses:

GEORGE H. FRAsER, CHARLES K. FRASER.

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