Improvements in and relating to Dies for Manufacturing Sanitary Pipes with Taper Ends.
Year: 1898

page_text: Date of Application, 21st Sept., 1898-Accepted, 23rd Dec.,
1898
COMPLETE SPECIFICATION.
Improvements in and relating to Dies for Manufacturing Sanitary
Pipes with Taper Ends.
We, JOSEPH STALEY, of Mushroom Lane, Church Gresley, in the County of
Derby, Manager, and JOSEPH PARKER, of Moira, in the County of Leicester,
Engine-wright, 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:-
The object of our invention is to provide or effect certain improvements in and
relating to dies for making sanitary pipes with taper ends.
In describing our invention reference will be had to the accompanying sheet of
drawings upon which Figure 1 is a vertical section on line a, a of Figure 2, and
Figure 2 is a plan on line b, b of Figure 1 illustrating the application of our
invention.
As will be readily understood only those parts of a sanitary pipe machine as are
absolutely necessary to the illustration of our invention are shewn upon the accom-
panying sheet of drawings.
In carrying out our said invention we provide a top centre A preferably but not
necessarily of a taper cross section, this top centre is suspended from the cross-
bar or upper part of the machine by the rod or bolt B, and in any case has its
larger diameter at the bottom between which and the die plate D the clay passes
into an annular space E formed between a lower centre F and the upper parts G, G₁
of a moulding box or outside socket die, in this annular space E the taper part of
the pipe is formed, the parts G, G are surrounded with a clamp H screwed or
otherwise fixed to the underside of the die plate, the lower centre is hung from the
top centre by means of the bolt or rod K and has a slight amount of vertical play,
say for example about 3 of an inch and stopping upon a suitable stop or stops K',
it is formed of any desired taper and depth having its larger diameter at the top
where it is rebated or otherwise jointed with the top centre; the outside moulding
box or socket die is formed of the same taper as the lower centre and is in halves
hinged to the table L to open and close as desired, the lower parts of the moulding
box or outside socket die are suitably formed for making the outside of a socket
and rest upon the table L or bed plate of the inside socket die, this bed plate or
table, as is well known in sanitary pipe machines, is raised or lowered with the
assistance of balancing weights and is shewn upon the drawing (Fig. 1) in its
raised position, the meeting faces of the upper parts of the mould box or outside
socket die and clamp are formed obliquely so that when the table is raised to its
greatest height a tight joint is obtained; upon this raising of the table the top of
the inside socket die M engages the bottom centre and raises it until it forms a tight
joint with the top centre, the machine is now set in motion and the clay issues
through the die until the socket and the taper parts of the pipe are completely
formed, the table is then lowered by turning a crank or other device, and allowing
it to fall, the bottom centre stops in its descent after having assisted in forming
the taper, and the table continues its descent in the manner now well known in

page_text: such machines carrying the pipe with it which is cut off to any desired length. The
two halves of the outside socket die or mould box are now thrown back upon the
table to which they are hinged the pipe is removed from the inside socket die M
and the table is again raised as already stated the parts of the outside socket die
having been previously closed. If the inside socket die is formed separately from
the table the latter may be recessed to receive the bed of the inside socket die or
other suitable means may be provided for ensuring the said inside die being placed
centrally of the machine. The joints between the two halves of the moulding box
or outside socket die are preferably rebated as shewn upon Figure 2.
It will be understood that the tapered portion of the pipe may be made of any
length and need not necessarily bear the same proportion to its diameter as shewn
upon the drawings.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
In a machine or apparatus for making sanitary pipes with taper ends the employ-
ment of a taper bottom centre and taper mould box or outside die in segments
hinged to the table L in conjunction with a clamp H fixed to the underside of the
die plate, the whole being operated, arranged and controlled substantially as
described and illustrated.
Dated this 20th day of Con
1000