US746425A - Cut-off apparatus for gas or liquid supply pipes. - Google Patents

Description

No; 746,425. PATBNTED DEC. 8.1903. P. W. A. WIEsEBRooK.

CUT-OFP APPARATUS FOR GAS 0R LIQUID SUPPLY PIPES.-Y

APPLIGATION FILED APR. 11, 1903. No MODEL.

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UNITED STATES Patented December '-8, -1903.

nPATENT OFFICE.

FREDERICK WILLIAM A. WIESEBROCK, OF NEW YORK, N. Y., ASSIGNOR, BY

MESNE ASSIGNMENTS, TO THE EMERGENCY VALVE COMPANY, A CORPO- RATION OF NEW' YORK.

CUT-OFF APPARATUS FOR GAS QR LIQUID SUPPLY PIPES.

SPECIFICATION forming part of Letters Patent lNo. 746,425, dated December 8, 1903.

Application filed April 11, 1903.

To all whom it may concern.' l

Beit known that L'FBEDERICK WILLIAM A.

WIESEBROCK, a citizen of the United States, residing at New York city, (Bronx,) county and State of New York, have invented certain new and useful Improvements in Cut-OE Apparatus for Gas or Liquid Supply Pipes, of which the following is a specification.

This invention relates to an apparatus for Io controlling gases or liquids under pressure in supply-pipes in sucha manner that in case of breakage or leakage in the pipe-line the supply of the gas or liquid is automatically cut off. The apparatus is so constructed that I 5 the supply of the gas or liquid under normal conditions is not impaired and that in case of accident the supply is cut 0E Without subjecting the device to a violent shock.

In the accompanying drawings, Figure lis zo a vertical longitudinal section of my improved cut-o apparatus; Fig. 2, a cross-section on line 2 2, Fig. l; Fig. 3, a cross-section on line 3 3, Fig. 1'; and Fig. 4, a longitudinal sectionA of a modification of the apparatus.

The letter a. represents a flanged inlet-pipe and b a liangcd outlet-pipe arranged on opposite sides of a housing c and adapted to be tted into a length ofvpipe-line d. This pipeline conveys steam, water, or other gas or 3o liquid under pressure from a boiler or reservoir to the place of consumption.

Intermediate the inlet a and housing c is arranged a threaded ange ct" for the reception of a threaded ring e, which constitutes a valve-seat. Against this seat is adapted to bear a disk-shaped outlet-valve f, arranged within the inlet a and provided with a valvestem f', which is guided within a bearing e' of ring e and a bearing g' of a rest g.

Upon the housing c is mounted a cylinder h, containing a piston t', that has a larger surface area than the valve fand is provided with a rod fi', guided at its upper end withinthe hood h of cylinder h. The housing c is divided from the cylinder h by a partition j,

having a central openingl for the passage and guidance of the lower ,end of piston-rod 'i'. To this lower end of the piston-rod is pivoted at i2 the upper end of a link It, which passes Serial No. 152,135. (No model.)

through a slotted partf2 of stem f, Fig. 2. 5o

The lower end of 'link lo is pivotally connected by links Z to rest g and by a link m to stemf. The partition] is provided with a ductj, of small diameter, for establishing communication .between the housing c and the lower part of cylinder h beneath piston 'L'. The partition j is further provided with openings jz, controlled by upwardlyopening clackvalvesjg, located within the cylinder beneath the piston. 'The upper end of cylinder h above piston 'i has a discharge pipe or opening h2 for carrying off leakage and permitting the escape of air.

The inlet a, or pipe-section in front of the valvefcomm unicates with cylinder h beneath piston vl by a channel n, which is of larger diameter than the ductj. This channel is provided with a cock o, by which the flow of gas or liquid from the inlet to the cylinder may be controlled. Preferably the cock ois operated by a handle o', having worm o2, that engages a worm-wheel o3, fast on 'the cockspindle, so that a slow movement only can be imparted to the cock. An index p permits the position of cock o to be readily ascertained. 1

In use the apparatus is secured within the pipe d, preferably in close proximity to the boiler, reservoir, &c., so that the pressure from the boiler, &c., tends to close the valve f against its seat e. To turn on the supply, the cock o'is opened, when the steam, &c., will be admitted into the cylinder h beneath piston t'. A small portion of the steam will escape through duct j into housing c; but the main body of the steam will force the piston t' upward. As the area of the piston t' is larger than that of valvef, the upward movement of the former will through links k Z m open the latter against the boiler-pressure. The steam willnow be free to How through the open valve f, housing c, and outlet b into the service-pipe, the cock o being closed as4 soon as this flow has been established. During the normal operation of the parts the steam escaping upwardly through the @lack-valves y2 will hold the piston in its raised position, and thus hold the valve f open. If owing to breakage or leakage in the service-pipe the pressure in housing c is diminished, the full pressure still operating against valve f will be in excess of the reduced pressure against piston z', and consequently the valve Will be closed against its seat. This closing of valve f is accompanied by a descent of lpiston a', such descent being permitted by the escape of the steam from the lower part of cylinder h into the housing c through d uctj, the clackvalves t7'2 being closed through lack of pressure. By the means described a slow descent only of the piston can take place, andv consequently a correspondingly slow closing of the valve is effected, so that sudden shocks or jars to the apparatus or pipe are avoided.

In Fig. 4 the cylinderq is arranged Within the housing r, and the piston s is mounted upon the stem t' of the disk valve t. The partition u has the duct u. and clack-valve u2, as above described. The inlet QJ connects with the cylinder q back of the piston by the channel w, having cock w. The escape of air from the forward part of cylinder q is permitted by a pipe or vent q'. The operation is the same as described in relation to the main construction.

What l claim isc In a cut-off apparatus, the combination of an outlet-valve with a housing, a cylinder, an inclosed piston connected to the valve, a partition between housing and cylinder having a duct and an opening, and with a clackvalve within the cylinder adapted to control said opening, substantially as specified.

Signed by me at New York city, (Bronx,) New York, this 6th day of April, 1903.

FREDERICK WILLIAM A. WIESEBROCK.

Witnesses:

M. WIEsEBRocK, FRANK v. BRIESEN.

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