US813771A - Wicket-valve. - Google Patents

Description

J. F. BUSH. WIGKBT VALVE.

APPLICATION IILED JULY 1.

PATENTED FEB. 2'7, 1906.

UNITED STATES PATENT OFFICE.

WlCKET-VALVE.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed July 1,1904. Serial No. 215.0%.

T 0 all whom iv may concern.-

Be it known that I, J AMES F. BUsH, a citizen of the United States of America, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Wicket- Valves, of which the following is a specification.

This invention relates to valve constructions, and specifically to certain improvements in wicket-valves, the object of the invention being to provide means, associated with a valve of this type whereby one side of the valve may be forced against its seat after it has been swung closed, whereby leakage may be prevented and strain, due to the pressure of the water, may be taken off from that side of the valve which swings in the direction of the flow of water when the valve is open.

The invention consists in the construction described in the following specification and summarized in the claims forming a part thereof.

In the accompanying drawings, Figure 1 is a sectional elevation of a conduit and a valve I therein of the-type specified having the invention applied thereto. Fig. 2 is a transverse section of the conduit on line 1 1, Fig. 1; and Fig. 3 is a sectional plan view of the valve-locking devices on line 3 3, Fig. 2.

Referring to these drawings, it indicates an iron conduit, and b the valve, which is a suitably-trussed iron disk fitting closely within the conduit, asshown in Fig. 1, and is se cured to a shaft 0, extending diametrically through the conduit, to which shaft a suitable device, as a hand-wheel, (not shown in the drawings,) may be applied, whereby the valve may be rotated with the shaft to locate it substantially in the plane of the axis of the conduit to permit an unobstructed passage of the water through the latter.

In valves of this type a seat (1 is provided extending half-way around the valve on one side thereof, and another seat e, similar to the first, is disposed in the same position relative to the other side of the valve, whereby when the valve is closed one half thereof will bear along the edge thereof against the seat (1 and the other half against the seat 6, these seats being provided with a suitable packing or facing ring As usual in valves of this type, the seat is made by casting the same integral with the conduit a, as shown in Fig; 1 of the drawings. Assuming that the water flows in the direction of the arrow indicated in Fig. 1, it is evident that one-half of the area of the valve b will be subjected to a pressure which will tend to spring the outer edge of that part of the valve away from its seat, thus permitting more or less leakage, whereby as the water used for power purposes is frequently foul a deposit of sediment may be formed to a greater or less extent between the valve and its seat on that portion thereof which the pressure of water tends to force away from its seat. To overcome this objection to this type of valve, a screw-operated shaft 9 is mounted in the conduit in the position shown in the drawingsthat is, about vertically over the center of the shaft 0 at right angles thereto. This shaft has its inner end tapered, as at h, and extends through a boss (1 on the outside of the conduit and is provided with a packing-gland j, the outer end of the shaft extending through a yoke m and having a screw engagement therewith, said outer end being provided with a hand-Wheel 0, whereby it may be screwed in or out.

The yoke m may be secured to the conduit in any suitable manner, as by bolts shown in the drawings.

The shaft g is so loce ted that the tapered end thereof as it is screwed in toward the conduit will engage the edge of the valve, as shown in Fig. 1, whereby the continued screwing inward of the shaft will force that edge of the valve tightly against its seat, and thus prevent all possibility of leakage, and will force out to a great extent any deposit which may have accumulated on the seat during such time as the valve has remained open.

It is to be noted also that this forcing of the edge of the valve against its seat by means of the tapered shaft (Z will operate to force the opposite edge of the valve also against its seat, thus insuring a tight fit between these parts, even though the packing or facing ring should have become more or less worn.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. The combination with a conduit having a two-part flange on the inner wall thereof located partly on one side and partly on the other side of a plane vertical to the axis of the conduit, and constituting an abutment for the edges of the opposites of the valve, a wicket -valve pivotally supported at oppo- ITO site points thereon substantially in the plane of said flanges, and a screw-operated shaft having a tapered point extending through the wall of the conduit to bear against the back side of the valve to force the latter to a seat against said flanges.

2. The combination with a conduit having a two-part flange on the inner Wall thereof located partly on one side and partly on the other side of a plane vertical to the axis of the conduit, and constituting an abutment for the edges of the opposites of the valve, a

Wicket-valve pivotally supported at oppm site points thereon substantially in the plane of said flanges, a screw-operated shaft having a tapered point extending through the Wall of the conduit to bear against the back side of the valve to force the latter to a seat againstsaid flanges, and a packing-gland for said shaft.

JAMES F. BUSH. Witnesses:

M.-W. PHELPs, H. L. THOMAS.

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