US794288A - Pressure-regulating valve. - Google Patents

Description

No. 794.288- PATENTED JULY 11, 1905.

F. G. FEW.

PRESSURE REGULATING VALVE.

APPLICATION FILED JAR. 11 1905.

InVE EF NiTED STATES Patented July 11, 1905.

PATENT OFFICE.

FREDERICK C. FEW, OF ALBANY, NEW YORK, ASSIGNOR OF ONE-HALF TO PELATIAH J. MARSH, OF TROY, NEWV YORK.

PRESSURE-REGULATING VALVE.

SPECIFICATION forming part of Letters Patent No. 794,288, dated July 11, 1905.

Application filed January 11, 1905. Serial No. M0527."

To all whom, it may concern.-

Be it known that I, FREDERICK C. FEW, a citi- Zen of the United States of America, and a resident of the city and county of Albany, State of New York, have invented certain new and useful Improvements in Pressure Regulating Valves, of which the following is a specification.

My invention relates to valves; and the object of my invention is to provide a pressureregulating valve and shut-ofl in which the operating parts of the valve are removable and so constructed and connected up that the valve will automatically close itself when the pressure of the supply system equals a predetermined degree, together with such elements and combinations as are hereinafter more particularly claimed. I accomplish this object by means of the mechanism illustrated in the accompanying drawings, in which Figure 1 is a vertical section. Fig. 2 is a cross-section along the lines a a on Fig. 1. Fig. 3 is a cross-section through the valve along the lines 6 Z) on Fig. 1.

Similar letters refer to similar parts throughout the several views.

The casing A is provided with the ports B and C, the fluid entering by port B following the direction of the arrows through the port B to the opening C, through the .port (Z into the annular opening D, from whence it will escape through the port C to the working system. (Not shown.)

It is understood that as the fluid enters the port B in the casing it is first received into the annular chamber B, from which there are a series of ports I) 7), through which the fluid passes, as stated.

For the purpose of regulating the flow through the casing A, I provide a valve F, so arranged that the ports 6 b may be partially or wholly closed thereby. For this purpose a portion Gr of the valve is constructed at such an angle that it will seat with the port Z) when the valve is raised.

I preferably arrange for removing the portion G of the valve when the same becomes worn without materially disturbing the other portions of the fitting. To accomplish this,

I arrange at the base of the valve fitting or casing a nut H, which is secured to the casing by means of screw-threads at h. I then may unscrew from the stud J the plate K, with which the operating portions G are connected and by means of which said portions are held firmly in position. Then when the nut H is removed and the plate K taken out the 0perating-piece G falls out and may be replaced by another operating portion. This is an important part of my invention. It is well known that the great fault and trouble with regulating-valves is occasioned by the leakage at the operating parts thereof and the impossibility of correcting the defect because of the inaccessibility of the injured part. The passage of live steam in close contact with a good valve-closing surface will soon cut the surface, rendering it unequal, and therefore cause a leakage, which steadily increases because of further wear and action by the steam.

The removable portion G is preferably provided with a beveled side g, engaging with the stem L of the valve in such a manner that the pressure of the plate K against the bottom of the removable portion G will hold said portion G between the stem L and the plate K, as shown in Fig. 1.

To the valve-stem L, I arrange a lever M, to the end of which is a handle N, by the operation of which the valve may be by hand opened and closed and its positionregulated. It is an advantage to be able to regulate by hand a pressure-regulating valve by which the distance of the valve-seat from the valveclosing surface may be determined and changed to correspond to the various requirements.

Fulcrumed to the frame 0, attached to the casing A, is one end of the lever P, carrying the weight R, which weight is adjustable on the lever. The lever P preferably passes through the lever M. Thus the weight R on the lever P tends to prevent the valve from raising, and the amount of pressure upon the valve depends upon the position of the weight R on the lever.

The pressure of the fluid in the working system will be carried to the bottom of the valve and against the plate K in the manner indicated by arrows in Fig. 1, the tendency of said back pressure being to close the ports 6 by raising the portion G and bring that in contact therewith. When ports Z) are closed, they will remain so until the pressure beneath the valve is less than that against the portion Cr, when the valve will slowly open automatically.

I am aware that valves automatically regulated by the pressure on the working system have been in use for a long time. I do not, however, know of any automatically-operating regulating-valve in which the operatingsurfaces of the valve are renewable. Nor do I know of any automatically-operating regulating-valve in which there is provided a handregulator for the purpose of changing the degree of movement of the valve-stem. I also am unaware of any automatically-regulated valve constructed in such a manner that the operating parts may be readily removed.

By adjusting the size of the cylindrical openings in the casing A in such a manner that the relation of the portion communicating with the inflowing fluid to that portion communicating with the work to be performed shall be known the exact pressure of the passage of fluid may be determined without spring, weight, or other adjustment.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A pressure-regulating valve comprising a casing; an annular space within said casing a chamber within which the valve-pistonreciprocates; ports connecting said annular space with said chamber; a"valvestem; renewable operating-surfaces connected with said valvestem, adapted to close said ports; a means for removably securing said renewable surfaces in contact with said valve-piston; a means for exerting pressure on the valve-stem, all substantially as described.

2. A pressure-regulating valve comprising a casing; an'annular space within said casing; a chamber within which the valve-piston reciprocates; ports connecting said annular space with said chamber; valve-stem; renewable operating-surfaces connected with said valvestem adapted to close said ports; a means for removably securing said renewable surfaces in contact with said valve piston; with a weighted lever arranged in connection with said valve-stem, all substantially as described.

Signed at Albany, New York, this 22d day of December, 1904.

FREDERICK C. FEW. Witnesses: Y

FREDERICK W. CAMERON, HENRY F. CAMERON.

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