US587786A - Valve - Google Patents

Description

(No Model.)

0. 1-]. BROWN. VALVE. No. 587,786. Patented Au 10,1897.

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UNITED STATES PATENT OFFICE.

CHARLES E. BROWN, OF HOME, NEW YORK.

VALVE.

SPECIFICATION forming part of Letters Patent No. 587,786, dated August 10, 1897.

Application filed March 11, 1897. Serial No. 627,056. (No model.)

To all whom, it 7121a, concern:

Be it known that I, CHARLES E. BROWN, a citizen of the United States, residing at Rome, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Hy invention relates to that class of throttle-valves adapted to be instantly closed in case of accident to the machinery or other causes, and from various points in the system, either mechanically or electrically; and my invention consists, first, in the combination, in a stop or shut-off valve, of a valve seated against the pressure, a stem connecting said valve to a piston of greater area, an opening or by-pass around or throughsaid piston, and a vent pipe or valve the'area of which exceeds the area of the by-pass, whereby the opening of the vent will removethe pressurefrom one side of the piston and cause the main valve to be closed by the pressure on the piston at a speed proportionate to the area of by-pass andvent-pipe, and to certain other novel features, all hereinafter described.

In the accompanying drawings, Figure l is a sectional view of a valve with my improvements applied, showing the valve provided with wings or guides and with the valve opened and with one means of operating the valve electrically. Fig. 2 is a similar view showing another form of valve and with the valve closed, in both of which constructions an ordinary hand-wheel and screw being shown for fully or partially closing the valve. Fig. 3 is a sectional view showing the valve without a hand-wheel, adapted to be used as auxiliary to an ordinary hand-operated valve, also shown in said figure.

The casing A, except in the particulars hereinafter stated, is of the ordinary globe form, having the inlet B and outlet 0. The casing has connected thereto and preferably formed integral therewith a cylindrical portion D, having a suitable cap or cover D, secured by the usual form of flanges and bolts. The valve-seatE is formed in the diaphragm E, and is of the usual or any desired construction.

Mounted on a stem F is a valve G, constructed as shown either in Figs. 1, 2, and 3, or otherwise, as shall be found most desirable, to be seated against the pressures, and upon the other endof this stem is mounted a piston H to fit the cylindrical portion D. The piston is provided with a small by-pass, h, hereinafter referredto. A pipe D is connected to the cap or cover D, and which pipe is provided with a vent-cock D the area of outlet exceeding the area of the by-pass, for a purpose hereinafter explained.

Where the device is used as an auxiliary or supplement to an ordinary throttle-valve and its action controlled entirely by the action of the steam to open and close the same, the stem extends up beyond the valve and engages a suitable guideway D in the easing, or the arms H may be made to serve as guides, as shall be foundmost desirable.

\Vhen the device is used with a hand-wheel for wholly or partially closing the valve or releasing the same, a screw-threaded stem I is employed, passing through a suitable stuffingbox, with the lower end of the stem provided with a suitable socket or recess to receive apin 1, or a projecting portion of the valvestem passing through thevalve, and the upper end of the screw-threaded stem is provided with a hand-wheel I of any usual or desired construction.

By the construction and arrangement of parts it will be seen that as steam is admitted, the vent-cock D being closed, the valve will be raised and the steam will pass through the by-pass and under the piston and establish an equilibrium, allowing the free passage of steam, or the valve acting against the pressure of the steam is opened thereby, and an equal pressure being exerted on both sides of the piston said piston performs no function; but should a break occur in the machinery or from any cause it should become desirable to out off the steam instantly by opening the vent-pipegvhich is of larger area than the by-pass, the pressure will come on the side of the piston adjacent to the valve, and as said piston is of larger area than the main valve and the pressure is against both piston and valve the greater area will overcome the lesser and the piston will pull the valve against the seat closed, and upon again closing the cock of the vent the equilibrium Will be restored and the valve again open to action of the steam.

The pipe D may extend to different points in the system and be provided with a series of vent-cocks, the opening of any one of which will cause the same action. A wire may also be employed connected to the vent-cock and extend to different points, and by pulling on the same open the vent, or the same may be controlled electrically by a pair of electromagnets or helices, with the armature connected to the cock of the vent and a series of split circuits and push-buttons located at varions points in the system.

A whistle or other signaling device may be connected with the valve, so that when the vent-cock is actuated to cut off the steamsupply an alarm will be sounded. I

Various modifications in the means of controlling the vent-cock or the means of opening or closing the main valve. by hand may be made, as will be readily understood.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. Avalve for controlling the passage of the medium from the source of supply seated against the pressure, a piston of greater area connected to the valve, an opening or by-pass around or through said piston, and a vent pipe or valve the area of which exceeds the area of the by-pass, said valve being held open by pressure while the vent is closed or automatically closed when thevent is opened, substantially as described.

2. The combination in a valve, a valve seated against the pressure, a piston of greater area connected thereto, a by-pass' around or through said piston and a vent in combination With means disconnected from the Valve for regulating or cutting off the flow substantially as described, whereby While permitting the valve to be automatically opened and closed by pressure to be fully or partially out on by hand for the purpose set forth.

8. In a stop or shut-01f valve a valve-disk, a piston of greater area connected thereto, a. by-pass around or through said piston, a vent pipe or valve, and means for engaging the valve but disconnected therefrom for fullyor partially closing the valve by hand, substantially as set forth.

4. In a stop or shut-off valve a casing provided with the valve-seat, a valve-stem having a valve near one end and a piston at the other, a hole or by-pass in said piston, a cylindrical portion in which said piston moves closed at its outer end, a stop-cock connecting with the cylindrical portion, a screw-threaded stem to engage the end of the valve-stem but disconnected therefrom, and a hand-Wheel, substantially as described.

' In testimony whereof I affix my signature in presence of two witnesses.

CHAS. E. BROWN.

= l Vitnesses:

. JOHN S. BAKER, J. H. HELMER.

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