US317500A - Steam-actuated valve - Google Patents

Description

(No Model.)

C. H. BURTON.

. I STEAM AGT'UATED VALVE. No. 317,500. r Patented May 12, 1885 F74. l A ".s.; vvvv v mi2/@$615, Lw enor H Bluvll u, Parana Pnwmmmm wmmm. u c

UNITED STATES PATENT OFFICE.

CHARLES H. BURTON, OF CLEVELAND, OHIO.

STEAM-ACTYUATED VALVE.

SPECIFICATION forming part of Letters Patent No. 317,500, dated May 12,1885.

Application filed June 4, 1884.

To @ZZ whom it may concern.-

Be it known that I, CHARLES H. BURTON, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful. Improvements in Steam-Actuated Valves, of which the following is a specification.

This invention relates to that class of steamvalves known as steam-actuated valves; 7 and it consists in the peculiar construction and combination of parts, as hereinafter described and claimed.

In the accompanying drawings, Figure l is a vertical longitudinal section of a device embodyin g myinvention. Fig. 2 is aview, part in plan and part in section, of the same in line 2 2, Fig. l. Fig. 3 is a transverse vertical section of the same in line 3 3 of Fig. l. Fig. 4 is a view, partly in perspective and partly in section, of the cylinder and valve-cases, showing the arrangement of steam-ducts and a blind valve 7 for changing direction of steam in said ducts. Fig. 5 is a view in elevation of the blind-valve, looking in the direction of the arrow in Fig. 3, having outer wall removed to show interior.

A is a steam-cylinder. B is a steam-chest; C, the piston of steam-cylinder A. D is a cylindrical valve operating within the steamchest B. E E are steam supply or feed ports leading from the ends of the cylinder A inwardly toward the middle portion of the steamchest B. F is the exhaust. g is a port leading from the steam-chest B to the valve K, and g is another port leading from the opposite end of steamchest B to the valve K. This valve K constitutes my improvement in this present application. The parts of the device herein mentioned and preceding this valve are contained in my Patent No. 224,072, of February 3, 1880. Said valve K consists of a flat plate located in a chamber, 7c, attached to one side of steam-chest B, and slides upon the wall of said chamber next against the steamchest. Its impinging face has an S-shaped groove cut into it, the upper arm of said groove arranged to register with port g, and the lower arm arranged to register with the other port, g', and the central arm of said groove registering with a port, g2, leading from the steam-chest. The valve D in this construction is the same as that in my patent of (No model.)

the heads D D2 is made a small hole or vent, d,

through which steam may freely escape at all times, for the purpose of balancing the valve, and providing a steam-cushion at each end thereof. The two middle disks, D3 D4, are located and constructed to regulate and control the passage of steam from the steam-chest B to the cylinder A through the ports E, and also to regulate the exhaust of steam from the cylinder A.

K2 is a longitudinal stem or shaft, attached to valve K for operating the same. Motion is imparted to the valve K through the agency of the movements of boss K5, which is attached to the rod of the piston C. This boss K5, impinging alternately against the stops K3 K4, imparts an intermitting longitudinally-reciprocating motion to the valve K. The boss K5 may be substituted by a lever pivoted between piston-rod and shaft K2, and operated by stops on the piston-rod like those on shaft K2. This would require that the S-shaped groove in the face of valve K be reversed, as seen at s, Fig. 4, so that the same reciprocations of the valve K serve for changing direction of steam as by the other means.

The operation of my device is as follows: In Fig. l the parts are shonn in the position that they assume when the piston C is at its extreme left-hand throw. 1n this position steam will be fed through supply B into valve` chamber k, thence up through and over through the ducts la 7a2, into the steam-chest between the disks D D3 of the valve D, through the left-hand port E to the left face of the piston C, while the steam from the righthand face of said piston will be discharged through the exhaust by way of the right-hand port E and the space in the steam-chest between the disks D3 D4, and finally through the exhaust F. In this position of parts the portg and the upper arm of the groove in the valve K have registered, so that steam has escaped through said port from the right-hand side of the valve D, thus relieving the pressure suddenly from that end, the pressure of steam upon the opposite end having already IOO with its valve K, to the right sufficiently to bring the port g and the lower arm oi' the groove in the face of the valve K into register, at which time steam will escape andwbe discharged from the left end of the valve D, which will cause it to move to the left, causing the disk D3 to cnt ott' steam through the Ieft-hand port E, and, after it has passed over it, to permit the steam from the left ot1 the piston C to discharge through this left-hand port E, and the space between the disks D3 D4, ont through the exhaust F. Meanwhile, steam will be admitted through the suppl y B between the disks DeL D2, through the right hand port E to the right-hand face of the piston G, which will drive it to the posIton shown. in Fig. l. The holes d in the heads D D2 of the valve D should not be so large as to permit of too free passage of steam, so that when the steam is exhausted from either end the pressure elsewhere upon this valve will cause it to move in the direction of the exhaust, either to the right or left, as the case may be. In practice these holes maybe about one-sixiteenth inch in diameter for a valve two inches in diameter. It will be noticed that this valve K exposes -none of its ports to the chamber k, Where the steam first enters, and is therefore in that sense a blind valve. steam in said chamber serves to bear upon and hold the valve upon its face.

AHaving described my invention, what I claim isl. The valve K, inclosed in a steam-chamber and having grooves or channels in its face arranged to register with ports r/ g alternately, substantially -in the manner and for the purpose specilied.

2. The combination, with the main valve D, provided with the grooved pistons D D2 and intermediate pistons or disks, D2D4, ofthe auxiliary valve K, provided with S-shaped groove communicating with. the ports g g and port g2, and the cylinder A, with its ports E E and exhaust F.

GHARLES H. BURTON. Witnesses:

GEO. W. TIBBIr'rs,

M. Gr. NORTON.

The pressure of

Images