Improvements in Machines for Manufacturing Drain, Sewer, and like Pipes.
Year: 1894

page_text: Date of Application, 7th Dec., 1894-Accepted, 12th Jan., 1895
COMPLETE SPECIFICATION.
Improvements in Machines for Manufacturing Drain, Sewer, and
like Pipes.
I, RICHARD AMES, of 2 Clifton Crescent, Wilford Road, in the Town and
County of the Town of Nottingham, Architect, 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, reference being had
to the accompanying drawings and to the letters and figures marked thereon, that
is to say:
My invention relates to improvements in machines for manufacturing drain,
sewer, and like pipes, and is designed to enable the sealing chambers, or undercut
recesses, and the rest pieces or studs referred to in the Specification No. 3802º, to
be formed expeditiously, and at a single operation.
In carrying out my invention I provide the die, which may be used in any type
of pipe machine, with a detachable ring of suitable material, preferably brass,
divided into segments, and corresponding, in cross section, to the shape of the
sealing chambers or undercut recesses required. These segments are so divided
that one of them can be easily withdrawn after the moulding operation, thus
enabling the others to be readily manipulated to effect their removal.
Suitable recesses are provided in the die for the formation of the rest pieces or
studs, and an annular rib is formed on the base or flange of such die to produce a
suitable groove or channel on the face of the socket which is to constitute a key
for the cement fillet applied to the face of such socket.
And in order that my invention may be readily understood, I will describe the
same fully, with reference to the accompanying drawings, in which :-
Fig. 1 represents a central section taken on the line x, x, of Fig. 2, and showing
the die and ring in position inside the socket of a newly moulded pipe; the other
parts of the pipe machine being of the ordinary construction, are omitted.
Fig. 2 is a plan of the die and ring removed from the socket of the pipe, the
portion forming the rest pieces or studs being shown in a vertical section, taken on
the line y, y, of Fig. 1, and
Fig. 3 shows, half in section and half in elevation, the ring detached from
the die.
a is the socket of the newly formed pipe; b is the die; and b¹, b', recesses
therein for the formation of the rest pieces or studs. 62 is the rib on the flange
to form the groove or channel in the face of the socket. c is the detachable
and divided ring, with which the die is provided, for forming the sealing chamber
or undercut recess, and e' is the removable segment of such ring. This segmnient
has its edges parallel or preferably converging slightly towards the outside of the
ring, so that it can, after the moulding operation, and the withdrawal of the die,
be readily drawn inwards to release the other segments of the ring from the
sealing chamber or undercut recess. On its underside, this ring has a groove or
recess into which fits a tongue or fillet & on the die, for the purpose of keeping the
portions of the ring in position during the moulding operation. Dovetails, pegs,
or other suitable means may, if desired, be adopted for attaching the rings to
the die.
The working is as follows:-The ring is placed on the die, and the latter
brought up to its proper position in the machine. The plastic material for the pipe
is then forced into the machine in the usual manner, completely filling the space

page_text: between the die and ring and the outer part of the machine, which forms the
external shape of the socket, thus forming the socket as shown at a. The die b is
then withdrawn, leaving the ring c embedded in the sealing chamber, or other
undercut part of the socket. To remove this ring, it is only necessary to withdraw
the segment c¹ by an inward pull. Space is thus left for the easy manipulation of
the other segments for the purpose of their removal.
It will be obvious that a similar arrangement of detachable and divided ring
may be employed to form the sealing chamber or undercut recess in the collar
on the spigot, when such is employed, as is referred to in the Specification
previously mentioned.
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. In machines for manufacturing drain, sewer, and like pipes, the employment
of a ring divided into segments, to form the sealing chambers or undercut recesses
in the pipes, and corresponding in section to the shape desired to be given to such
sealing chambers, or undercut recesses, substantially as set forth.
2. In machines for manufacturing drain, sewer, and like pipes, the combination
with a die having recesses to form rest pieces or studs, of a suitably shaped
detachable ring made in segments, one of said segments being so shaped that, on its
withdrawal, the remaining ones can be readily removed, substantially as described.
3. My improvements in machines for manufacturing drain, sewer, and like pipes,
whereby I am enabled to form such pipes with the sealing chambers or undercut
recesses, and with rest pieces or studs, at a single operation, substantially as herein-
before described and shown with reference to the accompanying drawings.
Dated this 7th day of December 1894.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.