A Novel or Improved Joint for Sanitary Pipes constructed on the Spigot and Socket principle.
Year: 1898

page_text: A Novel or Improved Joint for Sanitary Pipes constructed on the
Spigot and Socket principle.
I, JOSEPH HOPPER, of 82, Charles Street, Hull, in the County of York, Plumber,
do hereby declare the nature of this invention to be as follows:
This invention relates to spigot and socket joints for pipes which are usually
constructed of earthenware, stoneware, and the like material to be used for
sewerage or the like purposes in which a liquid tight connection at the joint is
essential.
Hitherto cement has been mostly used as the jointing material for ordinary
pipe joints in which case if the ground breaks away beneath any of the pipes
the unsupported joints of the pipe are broken by the weight of the pipes them-
selves.
The object of my invention is to design a joint whereby a perfectly tight and
reliable joint is more quickly obtained by very simple means, and one which
will prevent the joints of the pipe being broken if the ground breaks away be-
neath them, the improved joint being specially adapted for sanitary pipes.
In carrying my invention into effect I furnish the spigot end of the pipe with
two lugs cast on or forming part thereof corresponding to which two slots are
recessed in the usual shoulder or enlargement of the socket end of the pipe.
These slots communicate with an annular undercut recess or tapered groove
formed in the shoulder or enlargement of the socket into which the two lugs
on the spigot are inserted and given a partial turn which in one direction locks
the spigot and socket ends of the pipe together in a manner due to the taper of
the groove. But in order to prevent leakage from the joint so formed I provide
between the end of the spigot and the ledge of the socket a packing preferably of
clay, or india-rubber or the like material may be used. so that when the ends are
locked together the packing is pressed up and a liquid tight joint is made.
When the joint is made or packed inside with cement as with an ordinary
joint a ragged edge of cement is often left to project into the pipe which form's
an obstruction for dirt to accumulate and stop up the pipe, but if this obstructing
ledge consists of clay as with my improved joint as soon as the ragged edge of
the clay gets soaked it is washed away down the pipe and does not cause the dirt
to accumulate. A similar joint could be used for iron pipes.
1000

page_text: A Novel or Improved Joint for Sanitary Pipes constructed on the
Spigot and Socket principle.
I, JOSEPHI HOPPER, of 82, Charles Street, Hull, in the County of York, Plumber,
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 spigot and socket joints for pipes which are usually
constructed of earthenware, stoneware, and the like material to be used for
sewerage or the like purposes in which a liquid tight connection at the joint is
essential.
Hitherto cement has been mostly used as the jointing material for ordinary
pipe joints, in which case if the ground breaks away beneath any of the pipes
the unsupported joints of the pipe are broken by the weight of the pipes them-
selves.
The object of my invention is to design a joint whereby a perfectly tight and
reliable joint is more quickly obtained by very simple means, and one which
will prevent the joints of the pipe being broken if the ground breaks away be-
neath them, the improved joint being specially adapted for sanitary pipes.
And in order that my invention may be clearly understood and readily carried
into effect, I will proceed to describe the same with reference to the annexed
sheet of drawings, in which Fig. 1 is a longitudinal sectional view of a pipe
joint constructed in accordance with my invention; corresponding to which
Figs. 2 and 3 are end elevations of the socket and spigot ends of the pipe respec-
tively; and Fig. 4 is a detail view of the spigot end of the pipe shewing the
tapered lugs cast thereon.
As shown in the drawing I furnish the spigot end a of the pipe with two
lugs a¹ a cast on or forming part thereof, corresponding to which two slots b1b2
are recessed in the usual shoulder or enlargement of the socket end 6 of the
pipe. These slots communicate with annular undercut recesses or tapered
grooves 34 formed in the shoulder or enlargement of the socket into which
the two lugs a¹a² on the spigot are inserted and given a partial turn which in
one direction locks the spigot and socket ends of the pipe together in a manner
due to the taper of the grooves 636. But in order to prevent leakage from the
joint so formed I provide between the end of the spigot and the ledge of the
socket a packing preferably of clay, or indiarubber or the like material may
be used, so that when the ends are locked together the packing is pressed up and
a liquid tight joint is made.
When the joint is made or packed inside with cement as with an ordinary
joint a ragged edge of cement is often left to project into the pipe which forms
an obstruction for dirt to accumulate and stop up the pipe, but if this obstructing
ledge consists of clay as with my improved joint, as soon as the ragged edge of
the clay becomes soaked it is washed away down the pipe and does not cause the
dirt to accumulate.
It is obvious from the above description that a similar joint could be used for
iron pipes.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
In the construction of the joints of pipes of the kind herein referred to the

page_text: use of tapered lugs cast on the spigot end of one pipe engaging with undercut
recesses or tapered grooves in the socket end of the other pipe so that a partial
turn of the spigot securely interlocks the spigot and socket ends of the joint
together, with or without a packing of clay, indiarubber or the like compressible
material, substantially as and for the purpose as hereinbefore described with
reference to the accompanying drawing.
G. J. CLARKSON,
Chartered Patent Agent, Stockton-on-Tees and Hull,
Agent for the Applicant.