Improvements in or relating to Pipe Joints.
Year: 1893

page_text: Date of Application, 25th Aug., 1893
Complete Specification Left, 5th May, 1894-Accepted, 30th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Pipe Joints.
1, WILLIAM BEATTIE, Sanitary Engineer, of 191 Victoria Street, West-
minster, S.W., do hereby declare the nature of this invention to be as follows:-
This invention relates to joints for pipes, particularly drain pipes and may be
carried out in the following manner :-One end of the pipe I prefer to form with an
enlargement or trumpet-mouth consisting inside of a cylindrical portion concentric
with the interior of the pipe, but larger to about the diameter of the outside of the
main portion of the pipe. Beyond this parallel enlargement the socket is enlarged
conically like a trumpet mouth the conical portion being preferably grooved or
roughened so as to afford a suitable holding for the cement, metal or other material
employed to make the joint tight. If desired the open end of the socket may be
reduced in diameter beyond the conical portion so as to afford a further holding for
the jointing material; in this case it is not necessary that the enlargement should
be conical so long as it provides a sufficient space for the jointing material.
The spigot end of the pipe is parallel and may be left plain for a suitable distance
from the end corresponding with the parallel portion of the socket; beyond this
distance I prefer to roughen it for a distance corresponding with the roughened
portion of the socket or a little more so as to provide a holding for the cement upon
the spigot as well as the socket. For special work the jointing surfaces where the
spigot and socket touch each other may be made accurate fits and even ground in
so as to produce virtually a tight joint, the cement, metal or other filling material
securing the pipes together as well as where necessary providing the requisite
tightness of joint.
It will readily be seen that such a joint as this is peculiarly applicable and
extremely useful for short lengths of pipe such as drain pipes in which with
the usual arrangements the pipe is apt to fall in making the joint thus leaving an
irregular surface upon the bottom which is very undesirable besides presenting the
sharp edge of the pipe at the top which is equally objectionable in case the liquid
in the pipe is running full bore. With this improved joint the two pipes are
always in accurate alignment as the inside pipe is so supported that it cannot fall.
Dated this 25th day of August 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Pipe Joints.
1, WILLIAM BEATTIE, Sanitary Engineer, of 191 Victoria Street, West-
minster, S.W., 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 :-
.
This invention relates to joints for pipes, particularly drain pipes and may be
carried out in the manner hereinafter described and illustrated in the accompanying
drawings in which :-
Figure 1 is a longitudinal section of a portion of a drain pipe constructed
according to this invention, the two joints there represented being shown one with
and the other without cement.

page_text: Figure 2 is a similar view of a modification.
Figure 3 shows a further modification.
Like letters indicate like parts throughout the drawings.
One end of each length or section A of the pipe I prefer to form with a socket
or trumpet-mouth B consisting inside of a cylindrical portion B¹ concentric with
the interior of the pipe A, but larger to about the diameter of the outside of the
main portion of the pipe. Beyond this parallel enlargement the socket B is
enlarged conically like a trumpet mouth as at B' the conical portion being
preferably, as shown in Figure 1 grooved or roughened as at B2 so as to afford a
suitable holding for the cement, metal or other material C employed to make the
joint tight. If desired the open end of the socket B may be reduced in diameter as
at B Figure 2 beyond the conical portion B' so as to afford a further holding for
the jointing material C; in this case it is not necessary that the interior of the
socket B should be conical so long as it provides a sufficient space for the jointing
material. It may for example be cylindrical as shown in Figure 3.
The spigot end of the pipe A is parallel and may be left plain for a suitable
distance from the end corresponding with the parallel portion of the socket;
beyond this distance I prefer to roughen it as at A' for a distance corresponding
with the roughened portion B3 of the socket B or a little more so as to provide
a holding for the cement C upon, the spigot as well as the socket. For special
work the jointing surfaces where the spigot and socket touch each other may be
made accurate fits and even ground in so as to produce virtually a tight joint, the
cement, metal or other filling material C securing the pipes together as well as
where necessary providing the requisite tightness of joint.
It will readily be seen that such a joint as this is peculiarly applicable and
extremely useful for short lengths of pipe such as drain pipes in which, with the
usual arrangements, the pipe is apt to fall in making the joint thus leaving an
irregular surface upon the bottom which is very undesirable besides presenting the
sharp edge of the pipe at the top which is equally objectionable in case the liquid
in the pipe is running full bore. With this improved joint the two pipes are
always in accurate alignment as the inside pipe is so supported that it cannot fall.
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 a pipe joint comprising a socket and spigot or spigot end forming the
interior of the socket of different diameters at different parts one part corresponding
approximately with the external diameter of and forming a bearing for the spigot
or spigot end and another larger to accommodate the jointing material between it
and the spigot end substantially as described.
2. Maintaining the alignment of two pipes at the joint by forming the socket
with a portion concentric with the bore of the pipe and into wbich the next length
of pipe fits substantially as described and illustrated in the accompanying
drawings.
3. A pipe joint constructed substantially as described and illustrated in Figure 1
of the accompanying drawings.
4. A pipe joint constructed substantially as described and illustrated in Figure 2
of the accompanying drawings.
5. A pipe joint constructed substantially as described and illustrated in Figure 3
of the accompanying drawings.
Dated this 4th day of May 1894.
WILLIAM BEATTIE,
W. P. Thompson & Boult,
Agents for the Applicant.