AN IMPROVED METHOD OF MAKING WATER- TIGHT JOINTS TO STONEWARE OR OTHER PIPES
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by Henry Malcolm Ramsay at the
Office of the Commissioners of Patents, with his Petition, on the
11th November 1874.
I, HENRY MALCOLM RAMSAY, of Amyand Park Road, Twickenham,
in the County of Middlesex, Civil Engineer, do hereby declare the
nature of the said Invention for "AN IMPROVED METHOD OF MAKING WATER-
TIGHT JOINTS TO STONEWARE OR OTHER PIPES," to be as follows:-
The Invention consists in the constructing, forming, and laying
grooved butt (in some cases grooved and rebated or half socket) stone-
ware or other pipes for sewerage works or other purposes in such manner
as to make perfect water-tight joints in the construction of such works.
In applying my Invention I construct or manufacture the body of a
pipe (any size) for the above-mentioned uses of the ordinary thickness
with grooved butt ends or otherwise as before described, each end to a
certain distance or length being made of double the thickness of the
body, the 12 inch pipes being say 2 inches, and so on in propor-
tion. In these ends I form a groove or sinking (varying of course in
width and depth the sizes of pipes) for the reception of a tongue or

page_text: ring of special form, which I make in cast or sheet lead, zino,
galvanized iron, or other material to the requisite width and thickness
suitable and fitting to the grooves or sinking.
In applying the above method of jointing I prefer a tongue or
ring be fitted and fixed in one end of each pipe before laying in 1
work, the tongue or ring being secured in groove or sinking by running
in with lead hot bituminous mastic asphalte, cement, or other substance,
the fastening material as described being dressed or rammed in.
In proceeding to construct or lay down works a pipe tongued at one
end (as before mentioned) to be laid in position in trench, the groove or
sinking of the following pipe as also face to end of pipe first laid being
fitted or charged with hot mastic or other substance previously referred
to, to be then laid in position and pushed home to joint, and the work of
laying so continued. As these description of pipes are required and
used only in localities where the subsoil is charged with water above
pipe levels, necessarily involving unsound foundation, it is under such
circumstances compulsory to provide or form a sound foundation for
joints or pipes in concrete or the like to bed on; for preference I con-
struct, provide, and lay at each joint and half pipe, sleeper and cap
blocks for receiving and covering at each such joints, which will not
only secure impervious and imperishable joints, but also ensure a true
and uniform line of barrel throughout, and prevent dislocation and
consequent leakage at the joints upon the work being fitted in and
rammed over, a result as to leakage which no existing system of jointing
provides against.
*
I may prefer in some cases that a tongue should be cast in lead in the
groove at one end of each pipe, screwed or finished wedge shape, the
groove at opposite end of pipe being bushed with lead or otherwise pre-
pared to receive either screw or wedged-shaped tongue. All the above
to be run in the requisite moulds or mandrils of cast iron.