US305131A - Balanced rotaky valve - Google Patents

Description

(NO Model.) '2 Sheets-Sheet 1.

, H. G. BEER.

- BALANCED ROTARY VALVE.

No. 305,131. Patented Sept. 16, 1884.

(No Model.) 2 SheetsSheet 2.

H. G. BEHR BALANCED ROTARY ,VALVE.

No. 305,131. Patented Sept. 16, 1884.

NrTED STATES YATENT OFFICE...

HANS C. BEHR, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF W. I. SALKELD, OF SAME PLACE. I

BALANCED ROTARY VALVE.

SPECIFICATION forming part of Letters Patent No. 305,131, dated September 16, 1884.

Application filed January 17, 1884. (X model.)

To aZZ whom it may concern.-

Be it known that I, HANS C. BEHR, of the city and county of San Francisco, and State of California, have invented an Improvement ilrBalanced Rotary Valves; and I hereby de,- clare the following to be a full, clear, and exact description thereof.

My invention relates to certain improvements in that class of valves which fit a concave cylindrical seat and vibrate or oscillate about their longitudinal axes to open or close the steam-ports in the valve-face, and which are best known as Corliss valves.

It consists of avalv e supported upon a trunnion-bar which is adjustably j ournaled in the heads of the valve-chamber, springs by which the valve is kept in contact with the valvc--- seat, but is allowed to rise under aback-pressure greater than that within the chamber, and a means for adjusting the trunnion-bar, all of which will be more fully explained by reference to the accompanying drawings, in which Figure 1 is a section taken transversely across the valve-chamber, valve, and trunnion-bar. Fig. 2 is a longitudinal vertical section of the valve-chamber and valve transverse to the axis of the cylinder and through the steam-port. Fig. 3 is a section transverse to the trunnions exterior to the valve-chest cover, showing the head of the latter. Fig. 4 is a section taken transversely across the valve chamber, showing the steam-port A open.

A is the steam-port leading from the valve chamber to the cylinder B, and it is shown covered by the valve C in its closed position. This valve is rotated upon axial trunnions D, like the ordinary Corliss valve, to open and close it, the trunnions' turning in bearings in the valve-chest covers H, and having a rocker arm, J, attached to one end and a pin, Y, upon the arm, by which connection is made to valvegear, in the usual manner.

The valve C is made hollow, with a rectangular opening extending axially through it, and is mounted upon the rectangular trunnion-bar G. The opening in the valve through.

which the trunnion-bar extends is larger than the bar in the direction vertical to the valveface, and the bar is provided with springs F .the chamber where they lie.

below,which press upon the lower part of the valve, and thus hold it down so that its upper part rests upon the top of the bar. These springs permit the valve to rise from its seat under any excess of pressure within the cylinder over that above the valve. This raising of the steam-valve under compression, or when there is water in the cylinder, often prevents fracture of cylindenheads or other damage to the engine. The valve-chest covers H project into the valve-chest a short distance, this part being of less diameter than the inside of This projecting part is held and adjusted by set-screws I, which pass through the flange U of the valx echest, as shown in Fig. 2. The covers are secured to the valve-chest flanges by screw-bolts a a. The holes in the covers through which these bolts pass are 'made larger than the diameter of the bolts, and with their greatest enlargement in the direction parallel to a line drawn through the center of the valve and the port A, because the greatest adj ustmentis required in this direction.

It will be evident that the valve may be raised or lowered with the covers by means of the set-screws I, and adjusted so that the steam-pressure upon the back of the valve will be thrown upon the trunnions D,and not upon the valve-seat; or, in other words, the valveface and valve seat will not be in actual contact, but will still be close enough together (as in the case of adjustable conical valves rigidly connected with the ban) and the resistance to motion would in such a case be only as much as in the ordinary Corliss valve.

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

1. A valve fitting a concave cylindrical adjustment it could never bind upon its seat, a

valve-seat so as to open and close the steamport by oscillation about its axis, and having a longitudinal rectangular opening, in combination with a rectangular trunnion-bar passing through it, and upon the top of which the upper side of the valve-opening rests, trunnions or journals upon which the bar turns, adjusted by radial screws, and an arm or device connected with one of the trunnions, by which it may be oscillated, substantially as herein described.

2. A valve fitting a concave cylindrical valve-seat so as to open or close the steamport by oscillation about its axis, and having a longitudinal rectangular opening through it, in combination with a rectangular trunnionbar extending through it, trunnions or journals upon the ends passing into the valvechamber heads, and radial screws by which the heads or trunnion journal-boxes may be moved and the valve adjusted with reference to the seat, substantially as herein described.

3. A valve fitting a concave cylindrical valve-seat so as to open or close the steamport by oscillation about its axis, and having a longitudinal rectangular opening through it, and a loosely-fitting rectangular trunnion-bar extending through it and journaled at its ends in trunnions adjustable by radial screws, in combination with springs F, so placed as to hold the valve down upon the bar, substantially as herein described.

4. A valve fitting a concave cylindrical valve-seat, and having a rectangular opening through it, a trunnion-bar extending through its interior, and having trunnions extending into the valve-chest covers, said covers being secured to the valve-chest by bolts of smaller diameter than the bolt-holes through the covers, in combination with radial adjustingscrews, by which the covers may be moved and adjusted, substantially as herein described.

5. In a cylindrical valve fitting a cone spouding valve-seat, and having a rectangular opening for a trunnion bar extending through it, the adjustable trunnions, as and for the purpose specified.

In witness whereof I have hereunto set my hand.

.HANS O. BEHR.

\Vitnesses:

S. H. NoURsE, 0. D. COLE.

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