Improvements in the Construction of the Joints of Drain and other Pipes.
Year: 1896

page_text: Date of Application, 10th Mar., 1896-Accepted, 9th May, 1896
COMPLETE SPECIFICATION.
Improvements in the Construction of the Joints of Drain and
other Pipes.
I, JOSEPH THOMAS BRISCOE Laurel Dene, Southbury Road Enfield Architect
and Surveyor do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My invention consists in the application of india-rubber or other flexible, com-
pressible and elastic material to the joints of drain and other pipes with the object
of making a perfectly watertight joint independent of any cement or other jointing
material to be used in conjunction therewith.
The india-rubber or other flexible, compressible and elastic material may be of
various sections, and may occupy a variety of positions. It is compressed by means
of three or more interlocking teeth provided at equidistant points on the interior of
the socket end of the pipe, and three or more interlocking teeth provided at
equidistant points on the exterior of the spigot end of the pipe; the teeth being
of such a bevelled form and occupying such a position, that when the spigot end of
one pipe is inserted into the socket end of another pipe, a slight turn causes the
teeth to interlock and forces the flexible, compressible and elastic material against
the opposing faces provided on the spigot and socket of the pipes, making by
compression a perfectly watertight joint.
A reference to the accompanying drawings and the following description thereof
will make explicit my invention.
The same letters of reference correspond to similar parts in all the figures.
Figures Nos. 1, 2, 3 and 4 show one form of the application, in which india-rubber
is applied in round section to the inside of the socket and on the outside of the
spigot ends of the pipes making when put together a double seal.
Figure No. 1 is a longitudinal section through the joint.
Figure No. 2 is a cross section through the joint.
Figure No. 3 is a view of the socket end of the pipe.
Figure No. 4 is a view of the spigot end of the pipe.
A is the india-rubber forming the inner seal; in this case fixed on the inside of
the socket of the pipe.
A₁ is the india-rubber forming the outer seal; in this case fixed on the outside
of the spigot end of the pipe by means of a hollow moulded shoulder "a."
a the shoulder provided on the spigot end of the pipe.
B; B; B the interlocking teeth provided on the outside of the spigot end of
the pipe.
B₁; B₁ B₁ the interlocking teeth provided on the inside of the socket.
C; C, grouting holes provided for the application of cement or other jointing
material to be used in conjunction with the india-rubber.
Figure No. 5 shows another form of application, india-rubber of round section
being fixed on the outside extremity of the spigot end, for the inner seal, and on
the hollow moulded shoulder "a" provided for it on the outside of the spigot end
of the pipe for the outer seal.
Figure No. 6 illustrates another form of application; india-rubber of round
section being fixed on the inside of the socket for the inner seal, and on the outside
extremity of the socket end of the pipe for the outer seal, the shoulder "a" on the
spigot end being of deeper section to meet it.

page_text: Figure No. 7 illustrates another form of application; a flat section of india rubber
being employed. A bead is provided on the inside of the socket on which the
-india-rubber forming the inner seal is fixed, the end of the spigot being shaped to
fit it. The shoulder "a" provided on the outside of the spigot is rounded or
beaded, on which is fixed the flat section of india-rubber forming the outer seal, the
abutting edge of the socket being shaped to fit it.
Figure No. 8 shows the application similar to Figures Nos. 1 to 4, but with the
inner seal only, the outer seal and shoulder "a" on the spigot end of the pipe being
omitted.
The same method of applying the single seal only, appertains to the other
illustrations also.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In joints of drain and other pipes the method of applying india-rubber or
other flexible, compressible and elastic material compressed in laying or fixing by
means of interlocking teeth or like device, provided on the pipes, substantially.as
and for the purpose herein before described.
2. In joints of drain and other pipes, the providing of teeth, which I term
interlocking teeth on the inside of the socket and on the outside of the spigot ends
of the pipes, of such form and occupying such positions that when the spigot end
of one pipe is inserted into the socket end of another pipe and turned slightly, the
pipes are interlocked and held firmly together, at the same time bringing them
-closer together, and compressing the india-rubber or other flexible, compressible and
elastic jointing material hetween them.
3. In joints of drain and other pipes, the hollow moulds and beads by which the
india-rubber or other flexible, compressible and elastic material is fixed firmly in
its positions for use, substantially as and for the purpose hereinbefore described.
Dated this Ninth day of March 1896.
JOS. T. BRISCOE.