Improvements in Pipe Joints.
Year: 1894

page_text: Date of Application, 17th Oct., 1894
Complete Specification Left, 16th May, 1895-Accepted, 22nd June, 1895
Improvements in Pipe Joints.
I, CUTHBERT BURNETT of South Hetton near Sunderland in the County of
Durham Engineer do hereby declare the nature of this invention to be as
follows
-
This invention relates to improvements in the kind of pipe joint popularly known
as the Forster joint described in his Patent Specification No. 2734 of 1873 in
which the jointing of pipes with spigot and faucet is effected by the interposition
of a round rubber ring of circular section, placed in position in the joint by
rolling contact, between the spigot and faucet respectively of the two pipes to be
joined together.
It frequently happens in taking up these pipes that the ring having become
hard set and being now flattened it will not roll and so great is the force required
to separate the pipes that a considerable proportion of pipes are broken in the
attempt.
Now my invention consists in the addition of one or any desirable number of such
spigots so that in the event of the usual spigot being broken off at least one other
spigot is available for making the joint.
The bed of the part circular groove in the second spigot part from the end is
of slightly larger diameter than the groove in the first or outer spigot part and
is of about the diameter and thickness of the main body of the pipe, so that for
using the second spigot a washer of correspondingly smaller section may be
required.
Dated this 17th day of October 1894.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
Improvements in Pipe Joints.
I, CUTHBERT BURNETT, of South Hetton, near Sunderland, in the County of
Durham, Engineer, 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 improvements in the kind of pipe joint popularly
known as the Forster joint described in his Patent Specification No. 2734 of 1873
in which the jointing of pipes with spigot and faucet is effected by the interposition
of a round rubber ring of circular section, placed in position in the joint by rolling
contact between the spigot and faucet respectively of the two pipes to be joined
together.
It frequently happens in taking up these pipes that owing to the rusted condition
of the joint and the ring having become hard set and being now flattened it will not
roll, and so great is the force required to separate the pipe that a considerable
proportion of pipes are broken in the attempt.

page_text: Now my invention consists in the addition to the spigot end of one or any
desirable number of such spigots so that in the event of the usual spigot being
broken off, at least one other spigot is available for making the joint.
ог
In the accompanying drawing is shown a longitudinal section of such a spigot
pipe and joint. The spigot end of the pipe A is in this example formed with two
spigot parts in continuation, the outer one being in the faucet end or socket of the
pipe B, and the joint between them is made by the rubber ring C. The spigot
parts are both formed with the usual part circular annular recesses
groove A¹ Ax and the flanges A' A** and A* A**. The recess A** may
be made slightly shallower than the recess A' so as not to weaken the pipe
unduly; a slightly smaller rubber ring would thus be needed for the groove Aix.
When it is required to cut off the outermost spigot end this is easily effected by a
cross cut chisel. applied at a so that A forms the end of the pipe A and the spigot
end in the socket is then removed.
A new rubber ring being put in the groove A¹ and the end A³× inserted in
the socket, the rubber ring will find its place against the flange A in the
socket.
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. The application and use for pipe joints of the character described of two or
more spigots to the end of the pipe which receives upon it the rolling rubber ring
and enters the faucet or socket of the adjoining pipe, so that when such a joint
Deeds renewing the end spigot may be cut off and removed from the faucet and the
next spigot be taken into use.
2. The construction of spigot pipe shown on the drawing.
of May 1895.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.