IMPROVEMENTS IN THE JOINTING OF SANITARY AND OTHER PIPES
Year: 1884

page_text: I, CHARLES WALL of Ashburnham Works Lots Road Chelsea S.W Builder do
hereby declare the nature of iny invention for IMPROVEMENTS IN THE JOINTING
OF SANITARY AND OTHER PIPES to be as follows:—
The jointing consists of a primary and secondary joints.
The primary joint is a semi circular groove formed in each sectional end of
a.pipo and jointed with tempered clay.
The secondary joint is a square annular groove inside the collar, and a wider one
outside the spigot but in a corresponding position to the groove in the collar, and
is jointed with any mastic material as asphalt bitumen or Portland cement
sulphur & which is poured thro' a hole formed in the collar and communicating
with both grooves.

page_text: I CHARLES WALL of Ashburnham Works Lots Road Chelsea in the County of
Middlesex Builder, do hereby declare the nature of my invention for IMPROVE-
MENTS IN THE JOINTING OF SANITARY AND OTHER PIPES, and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:—
This joint is for pipes with spigot and socketed ends and the pipes can be made
in any convenient lengths and sizes. My Invention consists of an improved
method of making a joint between two pipes, made either of earthenware iron,
lead, or any other suitable material, to be used for conveying liquids or gases, (for
sanitary uses I prefer earthenware to iron on account of being cleaner and not
liable to corrosion) and consists of a compound joint viz primary & secondary.
The primary joint is a semi circular groove formed in each sectional end of a
pipe and jointed with tempered clay, cement or other suitable material, so that
when the opposite ends of the pipes are brought together, a water tight joint is
formed, which also prevents the material used in making the secondary joint
finding its way into the pipes.
The secondary joint consists of a square annular groove, formed inside the collar
or socket, and a wider one formed near the end of the spigot, so as to be in a
I relative position to the one in the socket.
The groove round the spigot end being wider than the one in the socket, insures
the same area of both grooves being in a relative position in case the spigot should
be pushed too far home or not far enough.
A grouting hole is formed thro the socket communicating with both these
grooves, and the joint is formed by pouring thro this hole, liquid cement, molten
asphalte, bitumen, sulphur, or any other suitable material.
As regards pipes made of metal the primary joint can be made of clay, or other
suitable material, and the secondary joint of sulphur, Spences metal, or any other
material that will not contract in setting, according to the circumstances under
which they are used.
These pipes can be laid or fixed deviating from a straight line without any
detriment to the joint, and being a compound joint, will resist quite as much
pressure as the pipe.
The joint can be made easier and quicker than the ordinary method of jointing
and is a perfect joint.
In order that my Invention may be more clearly understood, I shall refer to the
several Figures & letters, on the sheet of drawings hereunto annexed.
Fig 1 shews a longitudinal section of the two opposite ends of two round pipes
jointed together.
Fig 2 shews a longitudinal section of two opposite ends of a pipe apart.
Fig 3, is an elevation shewing grouting hole C.

page_text: Figs 4 & 5 are elevations of two opposite ends of a pipe shewing groove D & E
for the primary joint.
A. Is the primary joint.
B. The secondary joint.
C. The grouting hole.
D & E. The semicircular grooves in the ends of a pipe
F. Is the square groove within the socket of the pipe.
G. The square groove round the spigot of the pipe.
Having now particularly described and ascertained the nature of my Invention
and in what manner the same is to be performed I declare what I claim is
1st Grooves D & E on the ends of the pipe forming the primary joint A.
2nd The wide square groove G round the spigot of the pipe and the relative
groove F round the inside of the socket forming the secondary joint.
3rd The combination of the primary joint A with the secondary joint B as and
for the purposes herein specified.