US1192809A - Pressure-regulating valve. - Google Patents

Description

'E. V. ANDERSON.

PRESSURE REGULATING VALVE.

APPLICATION FILED MAY 5.1915. RENEWED JUNE 14. ms.

Patented July 25, 1916.

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EDWARD V. ANDERSON,

OF MONESSEN, PENNSYLVANIA, ASSIGNOR. 0F ONE-HALF TO CHARLES E. GOLDEN, OF GRAFTON, PENNSYLVANIA.

PRESSURE-REGULATING VALVE.

Application filed'May 5, 1915, Serial No. 26,071.

To all whom it may concern:

Be itknown that I, EDWARD V. ANDERSON,

a citizen of the United'States, residing at Monessen, in the State of Pennsylvania, have invented certain new and useful Improvements in Pressure-Regulating Valves, of which the following is a specification. My invention relates more particularly tovalves designed to be opened wide immediately upon reduction of a predetermined amount of pressure on the low pressure side of the valve, as for example, in fire service pipes.

I have illustrated the improvements in a preferred form in the accompanying drawing, in which:

Figure 1 is a vertical central section of the valve with the connected operating parts; Fig. 2 represents a partial side elevation of a modified form of mounting for the regulating weight, and Fig. 3 is a section of said weight along the line (3) in Fig. 2.

As shown in the drawing, I provide a casing 4, with the central chamber divided by the perforated partition carrying a valve seat 5, and two additional chambers respectively above and below this. The main valve 6 is provided with an upward cylindrical extension 7 of the same diameter as the valve seat 5, and this cylinder fits tightly in the chamber formed by the liner 8, so that the main valve is cushioned both in openin and closing. Meantime there is no verticzfi pressure on top of the valve by reason of its being the same size as the seat. The valve stem 9 has an upward extension outside the main casing, and carries short gear 10 in mesh with two pivoted partial gears 11, mounted on the cap 4 on top of the main casing 4. The gears 10 carry extension arms 12 on which are weights 13, which may be in form of spheres, and may be fixed at any desired point by set screws 13*.

Below the main chamber of the valve casing, the valve stem 9 has an extension 14 carrying a dash-pot piston 15 operating, in a chamber 15?, and also a sealed piston 16 operating in an enlarged chamber 16 preferably formed by a liner in the main valve casing, held in place by the lower cap containing the port (17) to the atmosphere.

Normally the valve will be opened by the upward pull of the weights 13 until the Specification of Letters Patent.

square bar,

Patented July 25, 1916. Renewed June 14, 1916. Serial 110,103,693.

pressure on the outlet side to the left is sufiiciently high to prevent further rise when operating on the piston 16 through the port 16. Obviously the pressure on the low pressure side therefore will be regulated by the positionsof the weights 13, and obviously ifthe pressure on the low pressure side, and therefore on top of the piston 16, should fall below :the desired pressure, the valve will rise. It is particularly important that when the valve does open at all it should open to a considerable extent, and not merely vibrate and chatter as is so often the case with such valves. I accomplish this object by reason of the peculiar mounting of the weights for opening the valve. It will be observed that the lever arm between the center point (a) and the rack 10 is always the same, and that upon any downward movement of the weight13 the lever arm (a), (b), of this weight will lengthen to the point (0;), (c). That is to say, the valve cannot move suddenly, and when it moves at all it is subjected to a greater effort as it rises. Meantime the valve is further cushioned by the air cushion in the chamber 8, and by the water cushion inthe chamber 15 This construction has in practice shown a peculiar smoothness and certainty of operation, which has heretofore been almost unattainable in such valves, especially when used in very high pressure.

In Figs. 2 and 3 I have shown a modification in which the increase in the effort of lifting the valve is accelerated as it opens. That is the arm 18 or the rack 11 mounted on pivot 11 may be made in the form of a and the weight in the form of two disks 19 preferably carrying a roller 20, and having stop pins 21 and 22 at the limits of motion. Normally the disks 19 will lie against the pin 22, and when the valve has opened sufiiciently to move the arm 18 to the horizontal position, the disks will move out to the end of the arm against the pin 21. This form is particularly valuable where it is desired that when the valve opens at all it shall remain open.

In both forms of the device the arrangement is such that there is always a down pressure on the valve rod 9, and an up pressure on the teeth of the rack 11, so that there is no lost motion or looseness of play; and

this in connection with the constancy of the lever arm at this end of the lever is of great importance in the proper functioning of the device. Other advantages will readily occur to those familiar with the art.

Having thus described my invention and illustrated its use, what I claim is the following:

1. A valve comprising a casing, a perforated diaphragm with a valve seat, main valve having a stem extending upward and downward therefrom, a dash-pot chamber in the casing of the same size and containing the valve, dash-pot chamber on the lower end of the valve stem and a second piston operating in a cylindrical portion of said casing and subjected to low pressure, a gear and weighted lever connected to the upper end of the stem and adapted to exert constant upward pressure on the valve stem,

and to increase said pressure as the valve moves to open position.

2. A regulating valve comprising a casing having a perforated diaphragm with a valve seat, a main valve in the form of a hollow cylinder, a chamber in the casing fitting said cylinder to form a dash-pot, a second and larger cylinder also on the valve stem, and a chamber in the casing forming the closed space therewith and subjected to low pressure in the line, means to normally exert a lifting force on the valve balanced against the downward force on said latter dash-pot piston, and a device to increase the upward efiort on the valve when it attempts to rise off ,its seat, substantially as described.

In testimony whereof I have hereunder signed my name.

EDWARD V. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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