An Improvement in Drain-pipe Joints.
Year: 1889

page_text: Date of Application, 4th Apr., 1889
Complete Specification Left, 2nd Jan., 1890-Accepted, 15th Feb., 1890
PROVISIONAL SPECIFICATION..
An Improvement in Drain-pipe Joints.
I, WILLIAM SAMUEL EMDEN, of 10 Beaufort Buildings, Strand, in the County
of Middlesex, Manufacturers' Agent, do hereby declare the nature of this invention
to be as follows:-
My invention relates to the jointing of earthenware pipes such as are used for
drainage and like purposes. These are usually connected by spigot and faucet joints
with cement of some kind filling the annular space between the pipe and the socket
in which it is inserted. In joints made in this manner, the end surface of the
cement remains exposed over its whole annular area at the mouth of the socket,
and thus the cement is liable to disintegration which in time renders the joint
unserviceable.
In order to obviate this objection, I make the socket with an inwardly projecting
lip at its mouth, which lip nearly fits the outer periphery of the inserted pipe or
I form on the pipe a collar which nearly fits the internal periphery of the socket
at its mouth, and thus I practically close the mouth of the annular space which
contains the cement. In order to make the joint, I provide a lateral hole through
the wall of the socket on its upper side, and, having inserted the pipe and luted
round the narrow mouth of the socket, I pour liquid cement through this hole to
fill the annular space within the socket. In order to provide escape for air from
this space and to ensure the cement passing all round it, I divide the hole into two
parts by inserting a blade which lies parallel to the axis of the pipe and extends
down to the pipe; I pour the cement into the half of the hole at the one side of
this blade, so that, while the air escapes by the other half of the hole, the cement
flows quite round the pipe till it comes up to the hole, whereupon the blade is
withdrawn.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in Drain-pipe Joints.
I, WILLIAM SAMUEL EMDEN of 10 Beaufort Buildings, Strand in the County of
Middlesex, Manufacturer's Agent, 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 relates to the jointing of pipes of earthenware or like material such
as are used for drainage and like purposes. These are usually connected by spigot
and faucet joints with cement of some kind filling the annular space between the pipe
and the socket in which it is inserted. In joints made in this manner, the end surface
of the cement remains exposed over its whole annular area at the mouth of the socket,
and thus the cement is liable to disintegration which in time renders the joint
unserviceable.
In order to obviate this objection, I make the socket with an inwardly projecting
lip at its mouth, which lip nearly fits the outer periphery of the inserted pipe; or I
form on the pipe a collar which nearly fits the internal periphery of the socket at its
mouth, and thus I practically close the mouth of the annular space which contains the
cement.
Fig. 1 of the accompanying drawings shows a longitudinal section of a pipe joint
with the socket S made with an inwardly projecting lip A at its mouth nearly fitting

page_text: the outer periphery of the inserted pipe P; and Fig. 2 is a longitudinal section of a
pipe joint constructed with a collar A formed on the pipe P nearly fitting the internal
periphery of the socket S at its mouth. When it is required that the pipe or main
should have a flat bearing surface at its bottom, I construct it as shewn in Fig. 3
which is a longitudinal section and Fig. 4 which is a perspective end view of the
socket for a three bore pipe. In this case, the lower side of the joint is lap jointed as
shown at B B¹, preferably leaving a space for cement, and the remainder of its
circumference is constructed as an ordinary socket joint and provided as shewn with
an inwardly projecting lip A at the mouth of the socket S, or it may be with a collar
on the pipe P nearly fitting the internal periphery of the socket S at its mouth, as
.described above.
In order to make the joint I provide a lateral hole through the upper side of the
socket and having inserted the pipe P and luted round the narrow mouth of the
socket as at L I pour liquid cement through this hole to fill the annular space
within the socket providing a small second hole to enable the enclosed air to escape.
Or, in order to provide escape for air and to ensure the cement passing all round
the pipe, I divide the hole into two parts by inserting a blade K, as shewn in Fig. 1,
which lies parallel to the axis of the pipe and extends down to the pipe, I pour the
.cement into the half of the hole at the one side of this blade K, so that, while the air
escapes by the other half of the hole, the cement flows quite round the pipe till it
comes up to the hole, whereupon the blade is withdrawn.
Although I have described my invention as applied to drainage pipes it is equally
applicable to the jointing of pipes for other purposes.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
I claim is :-
In a drain pipe spigot and faucet joint made with cement, the use of an inwardly
projecting lip of the socket or of a collar on the pipe for nearly closing the mouth
of the annular space containing the cement, substantially as and for the purpose
herein set forth.
Dated 1000
ABEL & IMRAY,
Agents for the Applicant.