Improvements in Machines for Making Sanitary and Drain Pipes, Retorts, and like Articles.
Year: 1887

page_text: Date of Application, 13th Oct, 1887
Complete Specification Left, 13th July, 1888
Complete Specification Accepted, 17th Aug., 1888
PROVISIONAL SPECIFICATION.
Improvements in Machines for Making Sanitary and Drain Pipes,
Retorts, and like Articles.
We, JOHN CRAVEN and BENJAMIN CRAVEN, both of Wakefield in the County of
York Engineers, do hereby declare the nature of this Invention which has been
communicated to us from abroad by James Horsley Craven residing at Adelaide
in the Colony of South Australia Engineer, to be as follows:-
The object of this Invention is to provide machines for making sanitary and drain
pipes, retorts and the like wherein the pressure on the clay or other matter pressed
through the forming parts or dies of the machine is subjected to a steadier pressure
than in the ordinary steam actuated machines, the arrangement according to this
Invention also presenting the advantages of safety and economy and reduction in
size of the actuating cylinder-According to this Invention a small cylinder is
arranged above the forming parts of the machine the said cylinder containing a
differential piston or ram and in connection with this cylinder are inlet and outlet
pipes or passages for water oil or air under pressure supplied from an accumulator
or storage of the fluid under pressure or by a pump or equivalent means of obtaining
the requisite hydraulic or air pressure in the cylinder, a heavy pressure being
exercised to press down the piston or ram to force the clay or the like through
the forming parts or dies of the machine and a light pressure being exercised to
raise the said piston or ram gently. The pressure is admitted above and below the
piston or ram at the proper times which may be conveniently effected by a cock
operated by a hand lever or otherwise and alternately opening the inlet and outlet
pipes or passages to either end of the cylinder so as to admit the liquid or air
and allow it to exhaust as required. The said piston or ram has connected to it a
plunger projecting from the lower end of the cylinder and having at its lower end
the part which presses on the clay or the like. In this plunger so projecting there
is a central hole which works over the central guide rod which supports the inner
forming part die or core.

page_text: The Invention is not limited to the precise details described, for instance, the
apparatus may operate horizontally or at an angle instead of vertically and the piston
or ram may be returned by an auxiliary ram provided with a crosshead and coupling
rods connected to, the plunger which acts on the clay or the like.
Dated this 13th day of October 1887
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C.,
Agents for the said John Craven
and Benjamin Craven.
COMPLETE SPECIFICATION.
Improvements in Machines for Making Sanitary and Drain Pipes,
Retorts, and like Articles.
We JOHN CRAVEN and BENJAMIN CRAVEN both of Wakefield in the County of
York Engineers do hereby declare the nature of this Invention which has been
communicated to us from abroad by James Horsley Craven residing at Adelaide
in the Colony of South Australia Engineer and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
The object of this Invention is to provide machines for making sanitary and drain
pipes retorts and the like wherein the clay or other matter pressed through the
forming parts or dies of the machine is subjected to a steadier pressure than in the
ordinary steam actuated machines the said pressure being effected according to this
invention by means of a liquid or of air under pressure the arrangement also
presenting the advantages of safety and economy and reduction in size of the actuating
cylinder. We will describe this invention with reference to the accompanying
drawings whereon Figure 1 is an elevation and Figure 2 a vertical section. According
to this Invention a small cylinder A is arranged above the clay receiver G of the
machine the said cylinder A containing a differential piston or ram B and in
connection with this cylinder A are inlet and outlet pipes or passages marked C
and D respectively for water oil or air under pressure supplied from an accumulator 3
or storage of the fluid under pressure or by a pump or equivalent means of obtaining
the requisite hydraulic or air pressure in the cylinder A. a heavy pressure being
exercised to press down the piston or ram to force the clay or the like through the
forming parts or dies of the machine and a light pressure being exercised to raise the
said piston or ram gently. The pressure is admitted above and below the piston or a

page_text: ram and exhausted from the opposite side thereof at the proper times by the pipes E
and F which may be conveniently effected by a cock H operated by a hand lever h
connected by the rod 2 with the fever ³ of the cock alternately opening the inlet and
outlet pipes or passages to either end of the cylinder A so as to admit the liquid or air
and allow it to exhaust as required. The said piston or ram B has connected to it a
plunger J projecting from the lower end of the cylinder A and having at its lower
end the part K which presses on the clay or the like. In this plunger so projecting
there is a central hole bored to allow of its sliding up and down on the central guide
rod L which supports the inner forming part die or core as shown clearly in
Figure 2.
The Invention is not limited to the precise details described, for instance, the
apparatus may operate horizontally or in position other than vertically as shown and
the piston or ram may be returned by an auxiliary ram provided with a cross head
and coupling rods or chains pulleys and balance weights connected to the plunger
which acts on the clay or the like and the means for operating the cock or valve at H
may be other than the precise arrangement shown.
We have shown the cylinder A as being supported by a framing M from a beam N
which carries the clay receiver G and forming parts, but the parts may be supported
any
other suitable way.
in
P is the handle for releasing the die, but these and other adjuncts which are or
may be provided and which we have not described may be of the ordinary or any
suitable kind.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
First. In machines for making sanitary and drain-pipes, retorts and like articles,
the employment of water or other liquid or air under pressure for exerting the
moulding force substantially as herein before described.
Second. The arrangement and combination of parts constituting the machine for
moulding sanitary and drain-pipes, retorts and the like, substantially as herein before
described and illustrated in the accompanying Drawings.
Third. In machines for moulding sanitary and drain-pipes, retorts and the like, the
combination with the piston of the power cylinder and with the central guide rod L
of the part K, which presses on the material of which the pipes or the like are made,
the said part K being connected to the piston of the power cylinder and being guided
and kept in proper position by the said rod L substantially as hereinbefore described
and illustrated by the accompanying Drawings.
Dated this 13th day of July 1888