Improvements in Apparatus for Moulding Pipes.
Year: 1896

page_text: Date of Application, 1st Jan, 1896
Complete Specification Left, 1st Oct., 1896-Accepted, 7th Nov., 1896
PROVISIONAL SPECIFICATION.
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 to be as
follows:-
This invention relates to improvements in the construction of apparatus for
moulding socketed pipes of earthenware.
The main framing of the improved apparatus consists principally of four vertical
columns bedded upon masonry and supporting by means of two horizontal beams
or girders the entablature which supports the inverted steam cylinder above and
the clay cylinder below. To the entablature are also fixed two hanging rods
which form guides upon which the table rises and falls, the said table being
provided at each end with a boss bored out to fit the guide rod.
To each end of the table is secured a strong leather strap which passes over
carrier pulleys above and its other end passing down between two of the columns
is attached to a box which is constructed to slide up and down between the two
columns. The weight of the two boxes is about sufficient to counterbalance that of
the table, and socket head.
When commencing to mould a pipe the table and socket head are supported and
held in position by means of two cotters which pass horizontally through slots made
in the hanging rods or guides. Each cotter is made with a tail piece in the former
of a toothed rack, and the cotters are inserted or withdrawn by means of two pinions
keyed upon the same shaft which is provided at one end with a hand wheel for
turning the same.
The socket of the pipe having been formed by the die core and socket head in
the usual manner, the cotters are withdrawn and as the body of the pipe is being
made the table is allowed to descend, the gradually increasing weight above the
table being counterbalanced in the following manner.
Between each pair of columns, above the balance box before inentioned, is fixed
a horizontal rod or bar provided with several hooks to each of which is attached
the upper end of a chain. The lower ends of these chains rest on the bottom of
the boxes when the table is at its highest point; and it will be evident that as the
table descends with its gradually increasing load of clay the boxes in rising will
gradually take up the links of the chains and as they thus accumulate the
weight of the balance box will increase in the same ratio and the balance be
maintained.
The same effect may be produced by dispensing with the fixed bar at the top
and hanging the chains onto the balance boxes (or onto bars similarly mounted and
supported by the strap connected to the table) in such a way that the greater part
of their length rests upon the ground. Then as the table descends and lifts the
boxes or bars the links of the accumulating chains are taken up one after the other
and the balance is thus preserved.
Lever brakes are also provided which act upon the surface of two drums fixed
on the friction pulley spindles so as to enable the attendant to control the descent
of the table by means of hand straps attached to the levers.

page_text: The ends of the brake levers converge and are connected to the same strap cord
or chain so that both brakes can be applied simultaneously.
Dated this 31st day of December 1895.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.
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
moulding socketed pipes of earthenware; and the same will be readily understood
on reference to the accompanying sheet of drawings of which
Fig. 1 is a face view partly in section and Fig. 2 a side elevation of a machine
for moulding pipes constructed according to our invention.
Fig. 3 is a detached part hereafter more particularly referred to.
The main framing of the improved apparatus consists principally of four vertical
columns a bedded upon masonry and supporting by menus of two horizontal beams
or girders the entablature which supports the inverted steam cylinder e above
and the clay cylinder e 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 el bored out to fit the corresponding guide
rod d.
To each end of the table e is secured a strong leather strap which passes over
carrier pulleys above and its other end passing down between two of the
columns a is attached to a box g which is constructed to slide up and down between
the two columns a. The weight of the two boxes y is about sufficient to counter-
balance that of the table e and socket head e².
When commencing to mould a pipe the table e and socket head e² are supported
and held in position by means of two cotters h which pass horizontally through
slots made in the hanging rods or guides d. Each cotter h is made with a tail
piece in the form of a toothed rack, and the cotters are inserted or
withdrawn by means of two pinions keyed upon the same shaft which is
provided at one end with a hand wheel 2 for turning the same (see also detached
view Fig. 3).
The cotters h should be suitably inclined as shewn to enable them to be
withdrawn from beneath the bosses e¹ the lower parts of which are similarly
inclined.
The socket of the pipe having been formed by the die core and socket head in
the usual manner, the cotters are withdrawn and as the body of the pipe is being
made the table e is allowed to descend, the gradually increasing weight above the
table being counterbalanced in the following manner.
Between each pair of columns a above the balance box y before mentioned, is
fixed a horizontal rod or bar k provided with several hooks to each of which is
attached the upper end of a chain (see left hand side of Fig. 1). The lower
ends of these chains & rest on the bottom of the boxes y when the table is at its
highest point as shewn; and it will be evident that as the table e descends with its
gradually increasing load of clay the boxes g in rising will gradually take up the
links of the chains and as they thus accumulate, the weight of the balance box g
will increase in the same ratio and the balance be maintained.

page_text: The same effect may be produced by dispensing with the fixed bar k at the top
and hanging the chains onto the balance boxes 9 (or onto bars similarly mounted
and supported by the strap connected to the table e) in such a way that the
greater part of their length rests upon the ground. Then as the table descends and
lifts the boxes or bars the links of the accumulating chains are taken up one after
the other aud the balance is thus preserved. This will be evident without further
illustration.
Lever brakes are also provided which act upon the surface of two drums
fixed on the friction pulley spindles f2 so as to enable the attendant to control the
descent of the table. This inay be effected by means of hand straps attached to
the levers, the ends of which may converge and be connected to the same strap.
cord or chain so that both brakes can be applied simultaneously.
Or the levers may be made as seen at 12 on the drawings the lower end being
pivotted to a nut upon a rod 13 having a right or left hand screw thread at its ends
and thus by means of a chain 14 and pulley 15 the rod 13 can be turned and the
levers 12 moved inwards or outwards to take off or put on the brake band l.
It will be evident that the improvements above described (with the exception of
the counter-balancing of the table and socket head) are equally applicable to the
moulding of other articles at present moulded by similar means.
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:-
1. The general arrangement of clay moulding apparatus above described with
table guided by hanging rods substantially as hereinbefore described and illustrated
by the annexed drawings.
2. The means for locking the table of clay moulding apparatus above described
consisting of the cotters, racks, pinions and other adjuncts, substantially as herein-
before described and illustrated by the drawings annexed.
3. The means for counterbalancing the table and socket head (or its equivalent)
of clay moulding apparatus above described, consisting of the straps, guide pulleys,
weight boxes or bars and chains or other accumulating weights substantially as
herein before described and illustrated by the annexed drawings.
4. The improved machine constructed and arranged substantially as hereinbelore
described with reference to the annexed sheet of drawings.
Dated this 30th day of September 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants