US698703A - Pressure-regulator. - Google Patents

Description

No. 698,703. Patented Apr. 29,1902.

. c. GuLLANn.

PRESSURE REGULATOR.

(Application med my'm. 1901.)

'part as controlling the main passage-way be- UNiTEn VSrn'frns CHARLES GULLAND, OF PITTSBURG, PENNSYLVANIA.Y

PRESSURE-REGULATOR.

SPECIFICATION forming part of Letters *Patent No. 698,703, dated April 29, 1902.

Application filed May s1, 1901.

To all whom, it may concern,.-

Be it known that I, CHARLES GULLAND, a citizen of the United States, residing at Pittsburg, Allegheny county, Pennsylvania, have invented certain new and useful Improvements in Pressure-Reducing and Stop Valves, of which the following is aspeccation.

My invention relates to a pressure-reduc-V ing and stop valve adapted especially to the type of valve in connection with which the improvement is shown.

In the accompanying drawings, Figure l is asectional view of the invention. Figs. 2 and 3 are views of a modication. Fig. 4 is a de-f tail of Fig. 1 enlarged.

In the figures a valve is shown in the lower tween the inlet and outlet. It comprises a stationary piston A, having openings through its walls, and controlling these openings is a movable cap B, which is kept to its seat by the pressure which normally lls the chamber C above the cap. As soon as the pressure in the chamber C is released the high pressure throws the cap open instantly, and its closing is effected gradually by the iilling ofthe chamber O from the pressure side. It is the object of the present invention to automatically control the opening of this valve bya predetermined pressure on the low-pressure side, so that the valve will open according to requirement insteadof being opened by the manual operation of a valve or button controlling the outlet from the chamber C, as has been shown heretofore in patents issued to me. In addition to the automatic action I have also made provision for a temporary closing ot' the valve manually without requiring any readjustment of the spring, which is set for action under a predetermined pressure on the low-pressure side.

The inlet to the chamber C is shown at a and leads out of a valve-chamber b, into which leads the inlet c from the high-pressure side. Double-acting balanced valve 61,3 with an upper and lower face, works between similar seats, and in the upper position of the valve the passage a to the chamber C is in communication with the valve-chamber h, and hence with the high pressure, and in thisk position the chamber C communicates with the high pressure and the cap Bis kept closed.

Serial No. 62,591. (No model.)

When, however, the valve d drops to its lowest position, it closes the passage from the chamber b, and the port a from the chamber C is then putin communication with the lowpressure side, (indicated by the passage e,) and as soon as this is done the live pressure acts upon the under face of the cap B and forces the pressure from the chamber() out through the channel e. The normal position of the valve d is that shown, and it is kept in this position by a spring f, which bears upon the iiange g, located just beneath a diaphragm h. The chamberv beneath the diaphragm is in communication with the passage e by a port e', and this equalizes the pressure and balances the valve d, so farl as the pressure i-s concerned,the spring f being effective to keep the'valve in its raised position or with the communication open from the high-pressure side to the chamber C. The valve d has an upwardly-projecting stem Zc,which bears against a diaphragmV Z, and this 'supports a disk m, carried by a hollow threaded stem fn, which has a threaded connection with a stem o, this stem terminating in a handle p. A casing D is iittedl to contain these las t-named parts and inoloses the diaphragm and the hollow stem, and this casing has an extension E threaded into it at its upper end forming a cap, and between the upper end of the cap E and the disk m is located a spring F, which is adjusted as to its tension so as to be kept inactive until a predetermined pressure has been reached on the low-pressure side, the diaphragm Z being exposed to this pressure.` As soon as the pressure falls to the limit, so as to be overcome by the spring F, it exerts suiicient power on the valve d to overcome the pressure of the spring f, thus closing the valve and opening communication from the chamber C to the lowpressure side.

The cap E corresponds in its threaded connection to the threaded connection between the stem o and the hollow stem m. The stem o passes through an opening in the center of the cap E, this opening being squared,and the adjacent part of the stem is squared to t the hole, so as to turn with the cap. The stem o has a circular part above the squared part, and this receives a sleeve q, loosely Iitted to the circular extension r of the stem o, the sleeve carrying the handles p. A ilanged cap ICO s holds the sleeve in place. The handles rest upon a flange t of the cap E, this flange having a cam-shaped upper edge, the normal position of the handle being at the low part of the cam by reason ofthe tension of the spring. It is my object to regulate the tension of the spring F to a nicety to meet the normal conditions; but it will be understood that there may be occasions when it is desirable to operate the valve manually and when it would not operate at that particular time automatically, and while it is desirable to provide for the manual action it is not desirable to interfere with the tension of the spring, and the construction just described provides for the manual action of the valve Without interfering in any wise or altering the tension of the Spring, which has been permanently set to meet the conditions existing. Supposing it becomes necessary to close the main valve and at a time when the low-pressure is insufficient to compress the spring F to allow it to close automatically, it will only be necessary to turn the handles p with a sufficient pressure upon them to cause them to ride up the cam, and this will have the effect of moving the stem o upwardly, which in turn raises the disk m, allowing the valve CZ to be seated by its spring f, thus closing the .main valve and keeping it closed as long as thisrelation of the parts continues. This manual action does not affect the spring E, but simply raises the disk fm positively.

Fig. 2 shows a modification of the casing inclosing the spring F. In this figure instead of the two-part casing adjustable one Within the other I provide a single casing D', which incloses the spring F', this spring being held within the casing between an adjustable disk E and a cylindrical block fm', located in the lower part of the casing D and supported or connected to the diaphragm l'. The casing D is provided with cam-slots and handies p, projecting through these slots', being screwed into the block 'm'. It will be seen that the tension of the spring F can be accurately adjusted by turning the screw o against the plate E', so as to set the action at a predetermined pressure; but when it is desired to stop the flow of the water before the low pressure does this automaticallyitis only necessary to turn the handles p', lifting the block m', taking the load from the stem 7c of the valve CZ, and thus the springf will actuate the Valve to close the opening to the lowpressure side, and thus check the flow. This modification, it will be seen, also provides for the manual action of the valve without interfering with the tension of the spring F', which has been set for automatic action at a predetermined pressure.

Referring to Fig. 1, it will be noticed that I vary the construction somewhat from the form of valve heretofore shown by me in that the stationary piston or abutment A has openings in its upper face, so that the low-pressure can assist through these openings to raise the piston-cap B. Heretofore an airchamber has been provided between the top of the stationary piston and the under face of the piston-cap; but I change this in the present construction.

l. In combination with a main valve controlling the main passage, said valve being normally closed by the pressure, a doubleacting balanced valve controlling the inlet and outlet from the pressure-chamber above the main valve, a springf for exerting aconstant pressure on the balanced valve and means for automatically actuating said valve against the pressure of the spring fon the decrease of pressure to allo-w the main valve to open, substantially as described.

2. In combination with a main valve controlling the main passage normally closed by the pressure, a valve controlling the inlet and exit of pressure, a spring set to operate at a predetermined pressure to cause the opening of the main valve, and manually-operating means adapted to be actuated to effect the temporary closing of the main valve without interfering with the predetermined tension of the spring, substantially as described.

3. In combination with a main valve controlling the main passage normally closed by the pressure, a balanced double-acting valve under spring tension controlling the'inlet and exit of pressure to said main valve, a spring set at a certain tension for causing the actuation of said controlling-valve, to close the same and to permit the opening of the main valve at a predetermined pressure on the lowpressure side and manually-operated means for effecting the temporary closing of the main valve through the action of the control ling-Valve without interfering with the tension of the mainspring, substantially as described.

In testimony whereof Il aflix my signature in presence of two witnesses.

CHARLES GULLAND.

Witnesses:

JAMES SMITH, CARL WENDELL HOLMES.

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