US258500A - Balanced valve and operating mechanism - Google Patents

Description

(No ModeL) G. W. STORER.

BALANCED VALVE AND OPERATING MEGHANISM.

Patented May 23, 1882.

Ila/9.

FIGCJ,

Nv PETERa Phom-Umo m her, wash'm mn, D. c.

UNTTED STATES PATENT @FFICIE.

GEORGE W. STORIIR, OF PHILADELPHIA, PENNSYLVANIA.

BALANCED VALVE'AND OPERATING MECHANISM.

SPECIFICATION formingpart of Letters Patent No. 258,500, dated May 23, 1882.

Application filed January 13, 1882. (No model.)

.To all whom it may concern:

Be it known that I, GEORGE W. S'roRER, a citizen of the United States, residingin Philadelphia, Pennsylvania, have invented certain Improvements in Balanced Valves and Means for Operating the Same, of which the following is a specification.

The object of my invention is to so construct a valve that the same can be readily operated by an electro-magnet; and this object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure l is a vertical section of a valve constructed according to my invention, the valve being closed, Fig. 2, a similar section, showing the valve open; Fig. 3, a sectional plan on the line 1 2; Fig. 4, a view of my invention in connection with another form of valve, and Fig. 5 a modified form of the valve shown in Fig. 1.

In operating, by means ofan elcctro-magnet, an ordinary steam-valve having a stem projecting through the casing, difliculty has been experienced, owing to the fact that such a valve is not perfectly balanced when open, the area of one face of the valve in such case being reduced to the extent of the area of the stem, so that in order to insure the closing of the valve the latter must be made so heavy or must be acted upon by such a strong spring that the magnet will not open it, the friction between the stem and stuffing-box also retarding the opening of the valve.

In carrying out my invention I discard the usual form of valve having a stem projecting through the casing.

The valve shown in Figs. 1, 2, 3, and 5 consists of a double shell, A A, the inner shell, A, having a branch, (L, and inclosing what is in the present instance the inlet-chamber B, the

outlet-chamber B being contained between the inner shell, A, and outer shell, A, and the latter having a discharge-branch, b. This arrangement may be reversed, however, without affecting the operation of the valve, which consists of a pair of connected pistons, 61, adapted to opposite ports 6, formed in the inner shell, A. The stem f of the valve has at the upper end a bar or plate, 9, which is contained within a chamber, F, the latter being inclosed by a steam-tight box, Gr, located on the top of the valve-casing, and forming in effect part of said casing, the chamber F communicating with the chamber B through a passage, 2'. It will thus be seen that no part of the valve projects through the casing, so that when the valve is opened said valve and its connections are entirely surrounded by steam, which exerts a uniform pressure on all parts of the valve, and thus insures the perfect balance of the same. The valve is also exactly balanced when closed, as the inner faces of the opposite pistons, to which alone steam then has access, have the same area exposed to pressure.

In order to actuate the valve, I employ an electro magnet, J, the poles of which in the present instance project through the top of the box G, the bar or plate g on the stem of the valve constituting the armature of the magnet, so that when a current is passed through the coils of the magnet said armature will be attracted and the valve will be opened, as shown in Fig. 2, the valve closing by its own weight when the current ceases to pass through the coils of the magnet.

A light spring may be used to facilitate the closing of the valve, and in cases where the valve is arranged horizontally instead of vertically such a spring will be necessary in order to insure the closing of the valve when the electrical circuit through the magnet is broken.

In Fig. 5 I have shown amoditication of my invention in which the valve-stem, armature, and chamber F are dispensed with, the electro-maguet being applied directly to the easing A. and acting directly upon the valve.

In order to prevent contact of the valve or armature with the poles of the magnet, I propose to employ a bar, 00, such as shown in Figs. 1 and 2, or pins, such as shown in Fig. 5.

In Fig. 4 I have shown myinvention as applied to another form of valve, the stem of which terminates in a tight chamber, to which steam has access when the valveis open through a central opening formed in the valve and stem, the result in this case being the same as in the valve shown in Figs. 1 and 2--that is to say, equal area exposed to steam on both sides of the valve, whether the said valve is open or closed.

Although I have described my invention as applied to a steamvalve, it will be evident that it may be used in connection with valves for air, gas, or liquid under pressure, and in some cases the poles of the magnet need not project through the valvecasin I claim as my invention- 1. The combination ofa valve-casing, a valve,

7 or valve and stem, contained wholly within said casing, and presenting to pressure, when either closed or open, opposite faces of the same area, and an electro-magnet adapted to actuate the valve, all substantially as set forth.

2. The combination of the valvecasing, the valve contained wholly within the casing, and

presenting to pressure, when either closed or open, opposite faces of the same area, and an electromagnet having a pole or poles projecting through the casing and adapted to act upon the valve or upon an armature connected thereto, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE W. STORER.

Witnesses:

HARRY DnURY, H ARRY SMITH.

Images