Improvements in Apparatus for Moulding Pipes
Year: 1898

page_text: Date of Application, 28th Oct., 1898-Accepted, 3rd Dec., 1898
Improvements in Apparatus for Moulding Pipes
We, HEMAN COULTHURST, JESHURUN COULTHURST, and ARMENA COULTHURST, all of
Robert Street Foundry, Darwen, in the County of Lancaster, Engineers, 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 construction of apparatus for
making socketed pipes of earthenware, and more especially such apparatus as is
described and shown on the Specification and drawings of the Letters Patent No. 16 of
the year 1896, granted to us and bearing date January 1st the objects of the present
invention being first to improve the means for locking the table whilst the socket is
being moulded and secondly (and chiefly) to improve the means for counter-balancing
the table and socket head of such or similar apparatus.
Our invention will be readily understood on reference to the accompanying
sheet of drawings on which
Fig. 1 is a front view of so much of the pipe moulding apparatus as is
necessary to illustrate the invention.
Fig. 2 is a partial front view of the table and locking apparatus drawn to a larger
scale.
Fig. 3 is a horizontal section taken just below the table and
Fig. 4 is an enlarged' section of one arm of the balance wheel showing the method
of affixing the counterbalance weight thereto.
a are four vertical columns supporting the entablature 6 which carries the inverted
steam cylinder c above, and the clay cylinder c¹ below.
To the entablature are also fixed two hanging rods d which form guides upon
which the table e rises and falls, the said table e being provided at each end with a
boss ex bored out to fit the corresponding guide rod d.
To each end of the table is secured a strong wire rope or leather strap or band f
which passes over a pulley g and to its other end is attached a rod carrying counter-
balance weights (not shewn) which are preferably made in removable sections.
These are principally for counterbalancing the weight of the table e and socket
head.
The straps are each bolted to their pulleys g so that they cannot slip, and to one
of the arms gx thereof (which is slotted) is attached a counterbalance weight h which
is preferably made in two parts bolted together as shown at Fig. 4.
At the lower end of each boss ex of the table is fitted a loose collar i, held (say by
a pair of half rings ix fixed to the table e) so that the said collar i is capable of being
turned about one quarter round by means of a handle k (see Figs. 2 and 3) attached
to one collar, the two collars being connected together by a rod and the lower face
of the collars being formed slightly wedge shaped like the thread of a screw for
a purpose hereinafter described.
Firmly fixed in the front and back of each hanging rod d is a long key or
feather m the top end of which is either rounded or wedge shaped to correspond with
the face of the collar i (see Fig. 2) the top of these keys being in such a position
that when the collars are just above the keys m the top of the table e is in

page_text: contact with the bottom of the die, and on turning the collars i round, the
table e will be locked in this position.
When the socket of the pipe has been formed in the usual manner the table is
unlocked by turning the collars i round so as to bring the grooves ¹ inside the
collars opposite to the keys or feathers m and the table e can now descend whilst the
body of the pipe is being formed, it being understood that the interior of each boss ex
is provided with two corresponding grooves to allow of their passage over the keys or
feathers m, these grooves last named being preferably prolonged vertically above the
bosses ex to the collars or bosses exx (see Fig. 2) to guide and keep the table e
steady when it is pushed down.
It will be seen that as the table descends the straps f will cause the wheels or
pulleys to revolve and raise up the weights h, and as these weights gradually rise
into the horizontal position their resistance to the fall of the table e will increase in
about the same ratio as the weight of the pipe on the table increases, so as to act as a
counterbalance to the accumulating weight of the pipe as it is formed.
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
First: In apparatus for moulding pipes the improved method of locking the table
by means of rotatable wedge shaped collars acting against the upper ends of feathers
or keys fixed in both sides of the hanging rods which guide the table, and
Secondly: The combination with the straps or wire ropes which connect the
balance weights to the table, of two wheels or pulleys over which the straps or ropes
pass, and to which they are bolted or otherwise fastened, with weights attached to
one of the arms thereof so as to offer an increased resistance to the descent of the.
table as the weight of the pipe thereon accumulates.
All constructed and arranged substantially as herein before described and illustrated
by the drawings annexed.
Dated this 27th day of October 1800;
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.