Improvements in Machines for the Manufacture of Sanitary Pipes, Chimney Pots and other similar Articles.
Year: 1895

page_text: Date of Application, 4th Sept., 1895
Complete Saanifination Lott 2nd An 1806 Accented 2nd May 1896
PROVISIONAL SPECIFICATION.
Improvements in Machines for the Manufacture of Sanitary Pipes,
Chimney Pots and other similar Articles.
We, ARTHUR SABINE and TIMOTHY SABINE of The Vulcan Iron Works,
Swadlincote in the County of Derby, Engineers, do hereby declare the nature of
this invention to be as follows:-
The object of our invention is to effect certain improvements in the class of
machines hitherto manufactured according to Letters Patent No. 1179 of 1878.
:
The first portion of our invention refers to the vertical screw or worm and to the
cylinder or casing in which the said screw or worm revolves. The blade of this
screw has hitherto been made of equal or very nearly equal thickness throughout,
the result of which is that the clay or other plastic material near the vertical shaft
of the screw moves round with it and therefore does not effectually perform the
work required by our present invention we form the blade of the screw of a wedge
section wider at the root or near the central shaft than it is on the outer edge, we
find that by so forming it the clay does not move round with it and we may
consequently employ a smaller screw to do the same amount of work, the said screw
being made of varying pitch in a similar way to those in the old machines, and may
be either single or double. The casing or cylinder in which the screw revolves has
hitherto been made in one piece the whole of which has had to be discarded when
the barrel in which the worm or screw part revolves, has become unduly worn; it
is evident that there is less wear on the upper part of the casing in which the
knives revolve than that in which the worm revolves, we therefore by our present
invention construct this casing in two parts, bolted or secured together by any
suitable means, so that the unworn part may still be retained when the worm barrel
or cylinder has to be discarded. In the old type of machine the inside of the worm
casing was provided with diagonal ribs to assist in preventing the clay from rising
out of the cylinder, these ribs did not effectually accomplish the desired end and
moreover were quickly worn away, by our present invention we substitute vertical
ribs for them the cross section of cylinder resembling a series of teeth set askew so
that as the worm revolves the clay is impinged on the sharp edge of the said ribs ;
a concentric internal rib or collar is placed inside the cylinder at the top of the
worm to assist in preventing the clay rising out of the same, and a corresponding
internal rib or collar is also placed at the bottom of the said casing.
Again, in the old type of inachine a platform with the lower part of the moulding
box descends with pipe, chimney pot or the like as it is passing through the die, the
said platform being provided with balance weights and adapted to descend as soon
as the rod upon which it is placed becomes disengaged from the cranked shaft, as
however the descent of the platform has hitherto been started by the weight or
pressure from the pipe or the like as it issues through the die, the sockets of the
said pipes or the like are frequently much injured thereby we therefore by
our present invention start the platform in its descent by means of two or more
springs or cushions of any suitable kind the tension of which tends to press the
table or platform downwards, and immediately the crank is turned give the platform
a slight start downwards, eases the mould out of the socket of the pipe and so
preserve the said socket intact; we may fix these springs at the head of the guide
rods or in any other suitable position and may adjust the tension as desired.
:

page_text: The gear at the top of these machines has hitherto been left unprotected and
accidents have resulted in consequence when the machines are being fed with
clay, we now case the whole of this gear in with a suitable cover or box and provide
any suitable bearings at the sides or ends for the pulley shaft.
Dated this 3rd day of September 1895.
W. SWINDELL,
Agent for the Applicants.
Improvements in Machines for the Manufacture of Sanitary Pipes,
Chimney Pots, and other similar Articles.
We, ARTHUR SABINE and TIMOTHY SABINE of The Vulcan Iron Works,
Swadlincote, in the County of Derby, 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 :--
The object of our invention is to effect certain improvements in the class of
machines hitherto manufactured according to Letters Patent No. 1179 of 1878.
In describing our invention reference will be had to the accompanying sheet of
drawings upon which :-
Figure 1 is a sectional elevation of a machine constructed according to our present
invention.
Figure 2 is an enlarged sectional plan on line a-a of Figure 1 of the cylinder or
worm casing, the worm itself in this view not being shewn.
Figure 3 is an enlarged section on line b-b of Figure 1 through the web of the
worm.
The first portion of our invention refers to the vertical screw or worm and to the
cylinder or casing in which the said screw or worm revolves. The blade of this
screw has hitherto been made of equal or very nearly equal thickness throughout,
the result of which is that the clay or other plastic material near the vertical shaft
of the screw moves round with it, and therefore it does not effectually perform the
work required; by our present invention we form the blade A of the screw of a
wedge section wider at the root or near the central shaft B than it is on the outer
edge, this will be seen more clearly in the section Figure 3. We find that by so
forming it the clay does not move round with it and we may consequently employ
a smaller screw to do the same amount of work, the said screw being made of
varying pitch in a similar way to those in the old machines, and may be of either
single or double thread. The casing or cylinder C in which the screw revolves has
hitherto been made in one piece with the casing D in which the knives revolve the
whole of which has had to be discarded when the barrel C in which the worm or
screw part revolves, has become unduly worn; it is evident that there is less wear
in the upper casing D in which the knives revolve than that in which the worm
revolves, we therefore by our present invention construct this casing in two
parts C and D, bolted or secured together by any suitable means, so that the
unworn part may still be retained when the worn barrel or cylinder has to be
discarded. We may however for some purposes and especially in small machines
still construct or form them in one piece. In the old type of machine the inside of
the worm casing was provided with diagonal ribs to assist in preventing the clay
from rising out of the cylinder, these ribs did not effectually accomplish the desired
end and moreover were quickly worn away, by our present invention we substitute
vertical ribs E for them, the cross section of cylinder resembling a series of teeth
set askew as seen in Figure 2 so that as the worm revolves in the direction of the
arrow (Figure 2) the clay is impinged on the sharp edge of the said ribs E; a
concentric internal rib or collar F is placed inside the cylinder at the top of the

page_text: worm to assist in preventing the clay rising out of the same, and a corresponding
internal rib or collar G is also placed at the bottom of the said casing. We
may if desired in the case of long barrels introduce a central annular rib or
collar, partly for strengthening purposes and partly for centreing the worm by
giving intermediate full bearing surface, this is indicated by dotted lines on
Figure 1.
Again, in the old type of machine a platform H with the lower part I of the
moulding box descends with the pipe, chimney pot or the like as it is passing
through the die K, the said platform being provided with balance weights L and
adapted to descend as soon as the rod M. upon which it is placed becomes disengaged
from the cranked shaft N, as however the descent of the platform has hitherto been
started by the weight or pressure from the pipe or the like as it issues through the
die the sockets of the said pipes or the like are frequently much injured thereby,
we therefore by our present invention start the platform in its descent by means of
two or more springs or cushions O of any suitable kind the tension of which tends
to press the table or platform downwards, and immediately the crank N is turned
give the said platform a slight start downwards, cases the mould out of the socket
of the pipe, and so preserve the said socket intact; we may fix these springs at the
head of the guide rods P or in any other suitable position and may adjust the
tension as desired.
The gear Q, R, at the top of these machines has hitherto been left unprotected
and accidents have resulted in consequence when the machines are being fed with
clay, we now case the whole of this gear in with a suitable cover or box S and
provide any suitable bearings at the sides or ends for the pulley shaft; we do not
however wish to claim novelty in this respect.
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 improved section of worm blade, the said blade being thicker at the root
or near the central shaft than on the outer edge, substantially as and for the
purposes described and illustrated.
2. A worm casing or cylinder with vertical internal ribs such as E, and collars
such as F and G, substantially as and for the purposes described and illustrated.
3. The worm casing C and knife casing D in separate castings or portions bolted
or otherwise secured together.
4. The worm casing C with vertical ribs E and internal collars F and G in one
casting or piece with the knife casing D substantially as described.
5. The springs O substantially as and for the purposes described and illustrated..
6. The whole substantially as and for the purposes described and illustrated.
W. SWINDELL,
Imperial Chambers, Albert Street, Derby, Agent for the Applicants.