AN IMPROVED JOINT FOR WATER AND OTHER PIPES
Year: 1877

page_text: LETTERS PATENT to James Robbins, of 9, Bartholomew Road, N.W., London,
for the Invention of "AN IMPROVED JOINT FOR WATER AND OTHER PIPES."
Sealed the 20th November 1877, and dated the 22nd August 1877.
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PROVISIONAL SPECIFICATION left by the said James Robbins at the Office
of the Commissioners of Patents on the 22nd August 1877.
JAMES ROBBINS, of 9, Bartholomew Road, N.W., London. "AN IMPROVED JOINT
FOR WATER AND OTHER PIPES."
My Invention consists in an improved method of making the joint between two
lengths of pipes, which may be either of earthernware, iron, lead, or any other
suitable material, and to be employed for the conducting of sewage, gas, water, or
other liquids or fluids.
Near one end of the pipe, and round the outside, a cupped or recessed collar is
formed, and the extreme end or neck is a continuation of the body of the pipe. At
the other end of the pipe is formed a socket.
*.***
.
The joint is made by forcing the projecting end or neck of one length of pipe
into the socket of the following length until it butts tight against a shoulder formed
inside the socket, at the same time the end of the socket will be forced into the
cupped or recessed collar, thus forming a firm and tight joint.
The substance used for filling in the joint will vary according to the material of
which the pipes are made.
$ 1
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page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Robbins in the Great Seal Patent Office on the 18th February
1878.
JAMES ROBBINS, of 9, Bartholomew Road, London, N.W.
FOR WATER AND OTHER PIPES."
"AN IMPROVED JOINT
My Invention consists in an improved method of making the joint between two
lengths of pipe, which may be either of earthenware, iron, lead, or any other
suitable material, and to be employed for the conducting of sewage, gas, water, or
other liquids or fluids.
Near one end of the pipe and round the outside a cupped or recessed collar is
formed, and the extreme end or neck is a continuation of the body of the pipe. At
the other end of the pipe is formed a socket.
The joint is made by forcing the projecting end or neck of one length of pipe
into the socket of the following length until it butts tight against a shoulder. formed
inside the socket, at the same time the end of the socket will be forced into the
cupped or recessed collar, thus forming a firm and tight joint.
The substance used for filling in the joint will vary according to the material of
which the pipes are made, and should be placed or poured into the cupped or
recessed collar.
In order that my Invention may be more clearly understood I shall proceed more
particularly to describe the same, and for that purpose I shall refer to the several
figures and letters on the Sheet of Drawings hereunto annexed.
Fig. 1 shows a longitudinal section of the two opposite ends of two round pipes
apart; Fig. 2 shows a longitudinal section of them jointed together; Fig. 3 shows
an elevation of the same.
A is the cupped or recessed collar formed round one end of the pipe; B is the
neck or continuation of the body of the pipe; and C is the socket formed at the
opposite end of the adjoining length of pipe. To form the joint the neck B is
forced into the socket C until it butts against the shoulder c, at the same time the.
socket Centers loosely into the recessed collar A.
Figs. 5 and 6 show the same form of joint applied to a square pipe b, b, showing
the lugs for fixing it when required.
When it may be necessary to make a joint in which the pipes may be taken
apart, the neck and the socket may be tapered to facilitate their withdrawal, as
shown in Fig. 4. For making a permanent joint these parts may be tapered in the
opposite direction, so as to form a dovetail with the substance used for filling in, as
shown in Fig. 8; and also the exterior part of the neck and the interior of the
socket may have ribs or grooves running round them, so as to give a firmer grip to
the filling-in material, as shown at d in Figs. 1, 2, 7, and 8.
In filling in the joint with any liquid material, such as asphalte or molten lead, a
hole or opening may be made through any convenient part of the recessed or cupped
collar A, or through the socket C, and through which hole the material may be
poured. Such a hole is shown at a in Figs. 1 and 2.
When a substance, such as Portland or other cement, is used for filling in it is
placed in the cupped or recessed collar before the joint is made.
Fig. 7 shows a modification of this joint, in which the principle is the same, the
cupped collar being replaced by a recess formed in the body of the pipe itself..
In the Drawings the parts which butt against one another are shown bevelled,
but they may be made in any other suitable form.
The pipes may be made of any suitable material, size, or shape.
Having now described the nature of my said Invention and the manner in which
the same is to be carried out, I wish it to be understood that what I consider to be

page_text: new, and therefore claim as my Invention, is the improved form of joint as herein
described and shown in the Drawings.
In witness whereof, I, the said James Robbins, have hereunto set my hand
and seal, the Eighteeth day of February, in the year of our Lord One
thousand eight hundred and seventy-eight.
JAMES ROBBINS. (L.S.)