Improvements in the Mode and Means of Manufacturing Pipe Joints.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Mode and Means of Manufacturing Pipe Joints.
I, THOMAS WILLIAM YARDLEY, of Weston Street, Swadlincote, Burton-on-Trent,
in the County of Derby, Architect, do hereby declare the nature of my said inven-
tion to be as follows;-
My invention has for its object improvements in the mode and means of manu-
facturing pipe joints which is specially applicable to the pipe joints as described
and claimed in the Specification of my prior Patent No. 18,238 of 1896 and by which
I am enabled to mould such joints at one operation and also to greatly reduce the
cost of manufacture.
In carrying my invention into practice I form my mould from which these
pipe joints are made with an inner core or plug which fits into the mould and this
mould is provided with a projection, the inner surface of which is recessed. Fitting
into this projection and into the recess are two or more loose rings the bore of which
exactly fit the diameter of the inner core or plug, by which means the whole of the
joint or socket can be moulded at one operation.
T 1
1007
GEORGE BARKER,
Agent for Applicant, 77, Colmore Row, Birmingham.
Improvements in the Mode and Means of Manufacturing Pipe Joints.
I, THOMAS WILLIAM YARDLEY, of Weston Street, Swadlincote, Burton-on-Trent,
in the County of Derby, Architect, do hereby declare the nature of my said inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement ;-
-
My invention has for its improvements in the mode of manufacturing pipe joints
which is specially applicable to the pipe joints as described and claimed in my
prior Specification, No. 18238%, and by which I am enabled to mould such joints
at one operation and also to greatly reduce the cost of manufacture.
In carrying my invention into practice I form my mould from which these
pipe joints are made with an inner core or plug which fits into the mould and this

page_text: mould is provided with a projection the inner surface of which is recessed. Fitting
into this projection and into the recess are two or more loose rings the bore of which
exactly fit the diameter of the inner core or plug which means the whole of the
joint or socket can be moulded at one operation.
.
In order that my invention may be more clearly understood and more easily
carried into practical effect I have appended hereunto a double sized sheet of draw-
ings upon which I have illustrated examples of my new mode of modelling and
making earthenware and other.pipes.
Figure 1 is a part sectional elevation of my die in which the socket end of a pipe
is shewn in process of manufacture.
Figure 2 is a similar view to Figure 1 only that it shews the die for forming
the complementary portion of the joint to that shewn in Figure 1.
Figure 3 is a front view of the socket portion of my joint removed from the die,
as it would appear on the pipe.
Figure 4 is a front view of the spigot or complementary portion of my joint,
removed from the die as it would appear on a pipe.
Figure 5 is an elevation of the principal die employed in making the socket
portion of the joint in the method wherein I use loose rings, which are removed to
show the shape of the die. Also shewing the chamfered are in position.
Figure 6 is a plan view of Figure 5 shewing a part section on the lines 12.
Figure 7 is an elevation of the principal die employed in making the spigot or
complementary portion of the joint. Shewing the chamfered are in section at
the line 3-4.
Figure 8 is a plan view of Figure 7.
Figure 9 shews an elevation of the rings taken from the die in Figure 5.
Figure 10 is an elevation of the other side of the rings shewing the notches 3
and which fit up against the die D.
Figures 11 & 12 shew plans of the rings where the projections are seen more
clearly.
Figure 13 is an elevation of the core usually employed in my dies although a plain
one is illustrated in Figures 1 and 2.
In making one of my improved pipe junctions, I build one portion of the joint or
socket on one of the ends of a length of pipe and the corresponding or comple-
mentary portion on the other end of the pipe so that when a number of such
lengths are put together the two opposite portions form a complete junction. In
some cases special advantages are obtained by forming both ends of the same length
of pipe alike which permits of any length of pipe being removed from a drain or
the like without disturbing the adjacent lengths.
When forming pipes with either the socket or spigot ends the mode of precedure
is exactly the same the difference in the production being governed by the shape
of the dies or patterns employed. In forming ordinary sized pipes in my dies I
should employ a die such as that shewn in Figure 7 where it is formed in one piece,
it being evident that the rings R and R¹ as shewn at Figures 11 and 12 could be
made integral with the die shewn at Figure 5. Of course rings may be employed in
all cases but I use them especially in making pipes of large diameter which would
be easily deformed in removal from the moulds. Instead of the part of the die
being formed integral with the same it might be formed inside the "clamp" or
mould.
Whether I mould a pipe with a socket or spigot end the operation is practically
the same, I will therefore describe the operation of forming a length of pipe with a
spigot end as illustrated in Figure 4 and in process of manufacture at Figure 2.
The die plate P is fixed in any suitable manner in the pipe making machine and
may have guides such as G depending therefrom. The table T which is suspended
by balance weights passing over pulleys on the chandelier principle or by any other
suitable means is then lowered away from the die plate P to a convenient position.
The chamfered arc such as or Figure 1 is then secured to the table by screws
and the like and usually only takes up the space between the projections of the die

page_text: as seen in dotted lines at Figures 6 and 8 although it may form a horse shoe shape
by continuing further as illustrated. A die similar to that shewn at Figure 7 is
then slid on to the table by means of the guide slot t¹ being pushed on and off by a
handle such as H. Of course if I were making the socket end of a pipe I should
use the socket die as seen in use at Figure 1 the rings R R¹ being integral with
the die or not. When the die is in position as clearly seen at Figures 8 and 2 I
fix the core C as shewn in Figure 13 in the centre of the die adjusting its position
vertically by the screw c¹, its bevelled base fitting into a corresponding annular
groove in the die. Or I may use a plain core such as seen in Figures 1 and 2
when making large pipes as described hereafter. The mould or clamp M is then
placed over the die as seen at Figures 1 and 2 taking on to the guide G by ears or
lugs g. The clay is now forced into the mould which is brought tight up against
the die plate Pas seen at Figures 1 and 2 until clay is seen to ooze out at the base
of the die, through the shallow grooves made therein by filing or otherwise removing
sufficient metal for a thin edge of clay to appear shewing that every depression of
the die and mould are filled with clay. The table T together with the die and
mould is then lowered to any distance according to the length of pipe required,
and as the core is stationary (although it might be made to move) the pipe is pro-
duced as the mould passes down over it or vice versa. The pipe is then cut off with
a wire level on the top of the mould and is then removed by raising the mould M
and drawing away the die D by means of the handle H when the pipe may be
lifted away.
In making very large pipes I employ a core such as illustrated in Figures 1 and 2
in conjunction with loose rings. I then make the pipe as above described and
having cut it off level with a wire or the like I raise the mould M and draw away the
die D leaving the rings R and R₁ together with the core c inside it. In this state
the pipe may be carried away without the slightest risk of deforming it as the core
and rings support its walls. The pipe is then inverted and the core and rings
removed.
Having formed a length of pipe in the above described manner another socket or
spigot end is moulded and seamed onto the end of the pipe thus finishing it. When
my pipes are put together the projecting portion on the spigot end as seen at
Figure 4 drops into the corresponding grooves as seen in the socket end at
Figure 3 the lip on the latter portion falling into the recess 35 formed in the
coverlet portion of the spigot end. Of course a smearing of clay or other cement
may be put on the bearing surfaces to ensure a perfectly watertight junction.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I claim
is:
-
CLAIMS.
First: The improvements in the mode and means for manufacturing pipe
joints consisting essentially of a mould comprising a die such as D, clamp such
as M, and a bevelled arc such as d³ all working in conjunction with guides such as G
and a core such as C either stationary or free and operated for the purpose substan-
tially as herein set forth and as shewn upon the accompanying drawings.
Second-In forming pipes with the junction ends a die formed in one or more
parts with or without a handle sliding on a table in conjunction with a bevelled
ring or arc and a stationary or movable core all surrounded by a clamp or mould
and working on guides depending from the pipe making machines for the purpose
substantially as herein set forth and as shewn upon the accompanying drawings.
Third: In forming lengths of pipes with junction ends, the loose ring or rings
together with a removable or stationary core for use in making and supporting
pipes with junction ends substantially as herein set forth and as shewn upon the
accompanying drawings.
Fourth-The method of and means for manufacturing lengths of pipes provided

page_text: with junction ends in such a manner that when the pipes are placed together they
are locked into each other at the same time any one length is removable from the
others without otherwise disturbing them.
Darcu HISTO
p
THOMAS WILLIAM YARDLEY,
By George Barker,
Fellow of the Chartered Institute of l'atent Agents,
Agent for Applicant, 77, Colmore Row, Birmingham.