US400532A

US400532A - Service-pipe connection for gas-mains

Info

Publication number: US400532A
Authority: US
Publication date: 1889-04-02
Anticipated expiration: 1906-04-02

Description

. UNIT D STA TE'SPATENT OFFICE.

GEORGE WESTINGHOUSE, JR, OF IITTSBURG, PENNSYLVANIA.

SERVICE-PIPE CONNECTlO N FOR GAS-MAINS= SPECIFICATION forming part of Letters Patent No. 400,532, dated April 2, 1889.

Application filed September 13 1888. Serial No. 285,334. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE WESTINGHOUSE, J r., a citizen of the United States, residing at Pittsburg, inthe county of Allegheny and State of Pennsylvania, have invented or discovered a certain new and useful Improvement in Service-Pipe Connections for Gas-Wlains, of which improvement the following is a specification.

My present invention is an improvement upon that for which Letters Patent of the United States No. 329,405 were granted and issued to Junius A. McCormick, under date of October 27, 1885; and its object is to admit of the convenient attachment of service-pipes for the delivery of gas from a main without involving the necessity: of. perforating the main therefor, or the liability of injury to the service-pipes or their connections by subsequent variations of level in the main.

To this end my invention, generally stated, consists in the combinatiomwith a pipe-joint, of an inclosing-casing adapted to receive a liquid packing, a supply-pipe leading from the main into said casing, and a service pipe or pipes leading out of said casing. The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a longitudinal central section through a joint of a gas-main embodying my invention; Fig. 2, a plan or top view of the same, and Fig. 3 :15]; vertical transverse section at the line x as of The joint illustrated is of the bowl-andspigot type, the beaded end of one pipe-section, 1, entering a bowl or enlargement, 3, on

the adjacent end of the next section,'2, and

' suitable packing, l, being placed around the section 1 within the bowl. The joint is inclosed by a casing, 5, made in two sections,v

end packing 16. The joint between the bowl 3 and the opposite end of the casing is made tight by packing 7. A gas-supply pipe, 8, of

supplied to the interior'of the casing through a pipe, 10, connected to an opening in the upper end of the casing and closed by a tight removable plug. There being an equilibrium of pressure in the main and in the interior of the casing, the hydraulic seal formed by the liquid packing of the latter will effectually prevent leakage of gas from the main.

In order to admit of the delivery of gas from the main without direct connection thereto or forming openings and joints therein for the purpose, as well as to obviate the objections heretofore experienced by accidentalchanges of level in the main, as by settling or otherwise, I form'an opening in one or both of the end wallsof the casing 5*above the level at which the liquid packing thereof is maintained, and connect a service-pipe, 11, to each of said openings, which are preferably threaded to engage corresponding external screwthreads on the service-pipes 11. The latter may extend in line with the main for any desired distance, and through elbows 12 are led off laterally to the points of delivery of the gas. Either or both of the delivery-pipe openings in the casing are closed by temporary 'plugs'13 when the main is laid and the joint made, if it is not required to make a servicepipe connection or connections at that time.

It will be seen that under the above construction the service-pipes can accommodate themselves to variations in level of the main which may from time to time occur, without liability to breakage or strain or the creation of leakage by reason of the range of adjustment admitted by their screwconnections and by their own elasticity, as also that a material advantage is attained in obviating the necessity of boring the main, as heretofore, for the attachment of servicepipes.

I "claim as my invention and desire to secure by Letters Pat-en?- l. The combination of two pipcsections forming a joint, a casing closed at its ends around the pipe-sections adjacent to the joint and forming an annular chamber inclosing the same, and having a communicating vertical chamber provided with one or more end openings, and a gas-su pply pipe wholly within said casing and leading directly from the adjacent pipe-section into the upper portion of said vertical chamber, substantially as set forth.

2. The combination of two pipe-sections forming a joint, an inclosing-casing, a liquid packing or hydraulic seal inclosed in the cas ing, a gas-supply pipe wholly within said casing and leading from one of the pipe-sections into the casing above the level of the packing, and a service-pipe leading out of the casing above the level of the packing, substantially as set forth.

one. wns'rm'enousn, JR.

W itn esscs:

J. SNoWDEN BELL, R. H. WHITTLEsnY.