US312543A - Pressure-regulator and cut-off - Google Patents

Description

QN@ Model.) G.. WESTINGHOUSRJL PRESSURE REGULATOR AND GUT-OEE. No. 312,543. Patented Feb. 17, 1885i L: u '6, I MII|||||||||||||||||||||||||m 4:,'uxmlml mlmuul f Ruuuumlll NVENTOR;

WITNESSES:

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ATTORNEY UNITED STATES PATENT GFFICE.

GEORGE WESTINGHOUSE, JR., OF PITTSBURG, PENNSYLVANIA.

PRESSURE-REGULATOR AND cui-ovvl SPESIFICTION forming part of Lettera Patent No. 312,543, datedfFebruary 17,1885.

application mea october is, im (No model.)

through a pressure-regulator and cut-off em.

bodying my invention, a portion of the section center line; and Fig. 2, a plan or top view of the apparatus. y

The object of my invention is to afford couvenient and effective means forregulating the delivery of gas or other fluid at determined lower pressure from a source of higher pressure supply, as well as to cut oi' communication between the supply and delivery passages upon the cessation of the supply.

To these ends my'invention, generally stated, consists in the combination of a supply-valve located in the line between a supply-main and a delivery-pipe, astop device adapted to maintain said valve in open position, and a movachamber, the combined cross-section of ltheo enings. 3 being of 'limited area relatively to e supply-valve opening, for a purpose hereinafter described. 4 A ange or nozzle, 4, is formed upon the casing' 1 adjacent to its top,` for the attachment of a pipe, 5, leading from 5o a main or other source of higherpressure supbeing taken through a boss exterior to said ble abutment acting to release the valve from ply -of gas or other fluid; and a delivery-pipe, 6, for the passage of fluid to the point or points of utilization, is connected to a flange or nozzle, 7, on the casing, said pipe opening into a v space within the casing, which communicates with the opening 3' and pressure-chamber 2. v A ,supply-valve, 8, fixed upon a stem, 9, is' itted to seat over an opening in a partition, 10, extending across 4the casing 1, below the supply-opening thereof,'the valve-stem 9 passing with sufficient closeness to prevent the escape of fluid through the head llrof the casing, and having a hand-piece, 12, by which it may be raised and lowered, ou its' outer end.

As an additional preventive against the escapeof iluid from the casing, the projecting portion of the valve-stem is inc losed by a removable cap, 13, secured to the head 11 of the valve-casing'. A helical spring, 14, encircling the Valve-stem, bears at its opposite ends against the inside of the head 11 and the v back of the supply-valve 8, respectivelyfits tendency beingcto effect and maintain the seating of the valve, except when the latter is, as

presently to be described, held in open position. v

The pressure-chamber is fitted with amovable abutment adapted to be actuated in one direction by the pressure of fluid entering the chamber through theopening 3, and in the other 8o by a spring or weight. In this instance the abutment is composed of a flexible diaphragm 15, and a gravitating pressure-plate, 20. -,The diaphragm 15 is secured at and adjacentito its periphery between a ange, '16, projecting around the top ofthe pressure-chamber2,aud a cap or cover, 17,"secured by bolts ll8r and nuts 19 to the flange 16. -Pressure of fluid entering the chamber 2 through` the opening 3 will tend to elevate the diaphragm and plate 20,'acting against the downward tendency of the' gravity of the plate, and maintaining the abutment in position horizontally or. efflecting its elevation, respectively, according l as it may be sufficient in degree tobalance' or 95 to overcome thel action of gravity.

A spring may be employed in lieu of` the weight of the plate, if' desired, to effect the depression of the plate and diaphragm.

"A latchinglever, 21, pivoted by a pin, 23, iroo riod as fluid-pressure from the supply-pipe 5 is exerted upon the diaphragm 15 and pressureplate 20 by means of a cutoil' pin, 25, secured to the plate 20, and passing freely through a.guide-s'ocket, 26, in the cap 17,said pin forming a stop or bearing, against which abuts a latch, 27, which is fitted to slide longitudinally ou the free end ofthe lever 21,and is pressed outwardly thereon` by a spring, 28.

Upon the cessation of thesupply of 'fiuid through the pipe 5 and opening 3 the 4diaphragm 15 and pressure-'plate 20 are depressed by the gravity of the latter, and when the cut-4 of pin 25 moves below the level'f the latch 27, thereby clearing the same and permitting outward movement of the lever 21, the 'downward pressure of the spring 14 forces the stoppin 22 out of the inclined face of the groove 24 of the valve-stem 9 and seats the supplyvalve 8, thereby preventing accessof fluid to the delivery-pipe 6, upon the resumption of supply;` until the parts have been restored to their original position by the operator, and preventing waste and liability to accident, which would be liable to ensue in the event of a renewal of suppl y without preparation therefor t the point orpoints of utilization of the ilui The regulation of fluid-pressure in the delivery-pipe 6 is effected by a regulating-valve actuated by the movements of the diaphragm and pressure-plate in the following manner: A stem, 29, upon which is fixed a plate, 30, adapted to bear against the lower side of the diaphragm 15, passes freely through the diaphragm and pressure-p1ate, and fits at its upper end within a guide-socket, 31, on the cap 17 The lower end of the-stem 29 is coupled to the long arm of a bell-crank lever, 32, the short arm of which is pivoted toa bearing, 33, on theinside ofthe pressure-chamber 2,adja cent to the point atwhicli the valve-casing lis connected thereto. A double-beat regulating valve, 34, the faces of which are of Vsubstantially equal diameters, so as to be in equilibrium oli' pressure, is fitted to seat in openings in a chamber, 35, within the valve-casing 1, the space within said chamber communicating with the supply-valve opening and that`on its exterior with the pressure-chamber and delivery-pipe. The stem 36 ofthe regulatingvalve passes freely through the wallY of the pressure-chamber 2, and is coupled to the bellcrank lever 32 by a pin, 37, fitting slotted holes formed in the lever at the junction ot' its arms.`

Itwill be seen that opening and closure of the regulating-valve will be eected by dow nward and upward movements,respectively,of the diaphragm and pressure-plate, in accordance with and proportionately to variations of pressure in the Vfluid entering the chamber 2 through the opening 3.

In pressure-regulating devices of the usual 7 constructions heretofore employed variations of supply or consumption induce .objectionable vibratory movements ofthe regulatingvalve and the piston' or diaphragm by which itis actuated. This objection is overcome under my invention by the provision of a communication o i`.re1ativelylimited area between the regulating-valve case and the pressure-chamber, so that an appreciable time is required to eect the movement of the parts under variations of pressure of supply or demands of delivery.

To ena-ble excess of pressure in the chamber 2 to be relieved if-undnlyhigh, a series of openings, 38, is formed in the diaphragm 15, adjacent to its center, said openings registering with corresponding passages, 39, iu the pressure-plate, and being normally closed to the fluid'in the chamberv 2 by the plate 30. Upon the existence of an excess of pressure` in the chamber. 2, which may arise by leakage past the valve 34 when there is no utilization of fluid in the pipe 6, the upward movement of the diaphragm 15 will first close the regulating-valve, the stem 29 being caused ,to'follow the diaphragm by the resistance of a spring, 40 int'erposed between the plate 2O and'astop-nut, 41, fixed on the stem 29, above said plate. Upon the-closure of the regulating-valve farther upward movement of the st em29 and plate 30is prevented by the bearing Yof the valve :against its seats,and the continued movement of the diaphragm and plate 20 withdrawing the openings 38 from the plate 30, iluid escapes. through said .openings and the passages`39 into the space between the diaphragm and cap 17, from which it may be led, through a pipe connected to an opening, 42,in the cap, to any suitable point of dis` charge.

I claim herein as'my invention- 1. rlhe combination of a supply-valve governing communication between a supply and a delivery pipe, a stop device adapted to maintain said valve in open position, and a movable abutment subject on opposite sides, respectively, to the pressure of fluid delivered past theqsupply-valve and to the action of a weight or spring, and adapted to release the stop from the supply-valve by movement of the abutment eected by cessation of the fluidsupply, substantially as set forth.

2. The combination of a supply-valve governing communication between a supply and a delivery pipe, a stop device adapted to maintain said valve in open position, a movable IOO abutment subject to the Vpressure of fluid delivered by the supply-valve and to the action of a weight or spring, and provided with a bearing which holds thel stop in engagement withthe supply-valve during the .continuance of iiuidsupply, a regulating-valve governing' communicationbetween the supplyvalve and delivery-pipe, and a stem actuated by the movable abutment and coupled to said regulating-valve, substantially as set forth.

3. The combination of avalvecasing having'supply and delivery openings, a supplyvalve governing communication between said openings, a stem fixed to said valve andpassf .ing through the casing, a latclrlever pivoted to the casing and carrying a stop-pinengaging a'groove in the valve-stem, a. movable weighted abutment worki ng in a chamber communicating with the delivery-passage of the supply-valve, and aout-oil pin iixed to said abutment and bearing against the latch-1ever, substantially as set forth.`

4. The combination of a valve-casing having supply and delivery openings', a supplyvalve governing communication between said openings, a regulating-valve seated in acharnber interposed between the supply-valve and delivery-openings, -a pressure-chamber vcommunicating with the space between the-regu` lating-valve and delivery-chamber, a movable weighted abutment working in said chamber, a stop device adaptedto maintain the supplyv'a-lve in open position and to be released therefrom by the movement of said abutment, and a stem connected to said abutment and coupled to the regulating-valve, substantially as set forth.

5.' The combir'iation of a valve-casing hav ing supply and delivery openings, a pressurechamber communicating with said casing, a flexible dismhragnnl fitted in' said chamber and having one or more openings adjacent to its center, a pressure-plate resting upon the diaphragm and having passages corresponding with the openings thereof, a stem passing freely through the diaphragm and pressure plate and carrying a disk adapted to cover the openings thereof, aspring interposed between the pressure-plate and a stop on the stem, and a lever pvoted to a support on the pressurechamber and coupled to the stem and to the regulating-valve, substantially as set forth.

6.- Th'e combina-tion of a Valve-casing having supply and delivery openings, a. supplyvalve governing 'communication between said openings, a pivoted latch-lever carrying a stoppin engaging a groove in the stem of the euppl`y-valve, and a latch fitted to slide upon said lever and to bear against a cut-o' pin fixed upon an abutment which is movable'perpendicu'larly to the'lever, substantially as set forth.

7. The combination of a valve-casing, a supply-valve, and a regul'atingvalve fitting seats therein, a pressure-chambe` communicating vwith lthe valve casing, a` movable weighted abutment perforated adjacent to its center and working in said chamber, a lever'pivoted' to the casing and carrying a stop-pin engaging a groove in the supply-valve stem, aout-off pin fixed to the movable abutment and bearing 'against the free end of the. lever, a stem connected to the abutment with the capacity of a limited deg-ree of movement 'of the abutment independently of thc stem, a plate fixed on said stem and adapted to cover the perforations of the abutment, and a double-armed lever lcoupled to said stem and to the regulatingvalVe, and p ivoted to a fixed support, substantially as set forth.

In testimony whereof I have, hereunto set my hand.v

y ano. WnsrINGHoUsn, JR.

Witnesses: v

J. SNOWDEN BELL, R. H. WHITTLESEY.

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