US786667A - Emergency throttle-valve. - Google Patents

Description

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PATBNTED APR. 4, 1905.

PATENTED APR, 4, 1905.

L. NEUMANN. EMERGENCY THROTTLE VALVE.

APPLIOATION FILED APR.23,1904.

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m WL .Y W u L UNITED y STATns To all whom it' may concern:

l direction ot' the passage of the steam.

many, residing at Gleiwitz, in the Kingdom of Prussia, German Empire, have invented new and useiul Improvements in Emergency Throttlc-Valves, of which the following is a specilication.

My invention relates to a valve adapted to close automatically in the event of, the pipe in which it is fitted breaking, thus avoiding the danger which would otherwise be incurred, owing to the escape of the steam. Said valve is ot' the clack type and adapted to close in the It is connected by a two-armed lever arranged in the easing with a piston moving in a cylinder cast in one piece with the valve-casing and connected at one end to the feed side and at the other end to the delivery side of the valve.

rlhe two-armed lever is carried by a pin passing through the wall of the'easing and suportin" a weivhted lever actin@ to kee i the l: b b

valve open.

One advantage ot' this valve is that it can be arranged in every horizontal or vertical position and that by means ot' the lever provided outside the valve-casing it can be easily ascertained whether the-valve is 1n order or not,

while the combination of the piston with the valve adapted to close. in the direction of the passage of the steam prevents the latter from f being operated by smallvariations in the consumption of the steam or from being closed with a shock likely Ato injure the plant in the event of the pipe breaking.

n the accompanying drawings, illustrating i. my invention, Figure l is a longitudinal secl tion of the valve; and Figs. 2, 3, and 4f, crosssections on the line A B, C D, and E F, respectively, of Fig. 1.

E In the casing a, which is interposed in the g steam-pipe, preferably close to the boiler, is provided a valve d, which is guided by a rod 1; L c and limited in stroke by a stop e. With ythe rod is connected one arm of the twoarmed lever f, which is situated inside the casing and turns on a spindle g, one end ot' i which projects through a stuffing-box in the l side of the casing and carries a counter- Patented April 4, 1905.

PaTeN'i @Fries LUDWIG NEUMANN, OF GLEllV'lTZ, GERMANY.

EMERGENCY TH ROT'TLE`\!i\LVEx SPECFICATION forming part of Letters Patent N 0. 786,667, dated April. 4, 1905.

lipplicatinn filed April Z3, 1904. Serial No. 204,542.

l weighted lever .7.1- ',lheother arm ot thelever f is jointed to a piston-rod 2', connected with the piston Said piston moves in the cylinder Z and is always exposed on one side through the opening 0 to the pressure ot' the steam on the lfeed side ot the valve (see Fig. l) and on the other side through the passages a (see Fig. 2) to the pressure ol the steam on the delivery side of said valve. As above inentoned, as long as the pipe is in order the valve (Z is kept open by the forces acting thereon. The components of these forces are, lirst, the pressure of the steam on both sides of said valve (Z, which produces equilibrium; second. the pressure ot' the steam on both sides ot' said piston 1, which likewise produces equilibrium, and, third, the weight on the lever L. W hen the pipe in which the valve is contained breaks, the pressure on the delivery side of the valve and in the passages a, Fig. 2, connecting the back part of the cylinder Z with the pipe on the delivery side of the valve (Z, is reduced, so that the piston is moved bythe steam actingon thc other side thereot` toward the right hand, Fig. l, and the valve d is moved bythe lever f toward its seat. As a consequence the steam passing through the valve is throttled to such an extent that the valve is advanced with great force and closed. At the same time, however, the piston .7s is also moved, owing to its connection with the valve d through the lever f. `When the source of danger has been removed, the cock m, Fig. 4t, is opened, and the steam thus allowed to pass through the channel n and act on the back of said piston and valve Cl. The Valve can therefore now be easily opened by correspondingly moving' 'the lever 7i.

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

1. rlhe combination with a claek -valve adapted to close in the direction ot the steam passing therethrough, oit a cylinder-casing cast in one piece with the casing ot' saidvalvc, a steam connection between one end of said cylinder and the `t'eed side of said clack-valve, a steam connection between the opposite end ot' saidcylindenand the delivery side of said valve, a piston in said cylinder, a two-armed lever inside Seid velve-cesing and connecting said valve and piston.y a pin passing through seid valve-*easing and carrying' said tWoarn1ed lever, e one-armed lever carried by said pin outside Said easing, end a Weight on said oneurned lever acting to .keep seid valve open, substantially as set forth.

2. The combination with a olaoli Valve adapted to close in the direction of the Steam passing tlierethroug'h, of a cylinderesing east in one piece with the casing' of seid valve, a steam connection between one end or' said Cylinder and the 'feed side of seid @lack-valve, a steam connection between the opposite end of said cylinder1 and the delivery side of seid vulve, a piston in Said Cylinder, e two-armed lever inside seid valve-casing and connecting said valve und piston, e pin passing through said valve-easing and carrying said two-armed lever, u one-armed lever carried by Said pin outside Seid easing and a weight on said onezzrmed lever acting to keep Seid Valve ogen, a channel connecting the feed side of seid valve with the end ot' Suid cylinder in oonneetion with the delivery side of seid Valve, e eocl adapted to open and close said ehe-nneL sub stantially es set forth.

3. rEhe combination with elaek -velv adapted to close in the direction of the steal; passing therethrough, of a cylindercasini; communicating' with the Casing of said Valve a piston in seid cylinder, a steam oouneeti 1 between one end of said cylinder and the feel( side o"y said @leek-Valve, a steam oonneetioi between the opposite end of seid cylinder, an( the delivery side of said valve, means Withil the easing for Connecting` said valve and pis ton together and adapting them to move si multaneously in opposite direotionsend meenf for operating said Valve and piston from the outside of the easing In witness whereof I have hereunto signe/C my name in the presence of two Subscribing Witnesses. Y

LUDWIG NEUMANN. Ntnessesz HERMANN TEIDEL, W; Perser-L

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