Improved Core and Spring for Making Sockets in Sanitary Pipes.
Year: 1894

page_text: Date of Application, 20th Sept., 1894
Complete Specification Left, 23rd Jan., 1895-Accepted, 18th May, 1895
PROVISIONAL SPECIFICATION.
Improved Core and Spring for Making Sockets in Sanitary Pipes.
WILLIAM INGHAM of Stainforth, Horsforth near Leeds, Sanitary Pipe
Manufacturer and BENJAMIN LANGTON of 1, Barras Garth Road, Wortley, near
Leeds Mechanic, do hereby declare the nature of this invention to be as
follows:-
Our invention consists of the addition of a flat steel or other metal spring to
core boxes of machines for making fire clay socket pipes.
Fig. 1 elevation shews the spring A half down the core box partially expanded
E represents the core box and C the bottom plate connected by rods B passing
through flange of core box E and attached to spring A.
Fig. 2 is a plan.
Fig. 3 is a perspective drawing shewing the spring A at the top of the core box
ready to receive the clay the bottom plate C attached to rods B comes in contact
with bed plate on machine when the socket is made and forces the spring back to
its normal position at the top of the core box.
In all machines not having our improved spring the clay falls down into the
socket core box as the pipe is being made and the consequence is cracked and bad
sockets the object of our improved spring is to act as a buffer to the clay whilst
being forced into the socket core box E. The core box E being tapered as the
spring is forced down whilst each socket is being made the spring gradually opens
but all the time having an upward or resisting pressure against the clay thus causing
the sockets to be solid and free from cracks.
Dated this 10th day of January 1895.
BECK & INCHBULD,
Agents.
Improved Core and Spring for Making Sockets in Sanitary Pipes.
WILLIAM INGHAM of Stain forth, Horsforth near Leeds Sanitary Pipe
Manufacturer and BENJAMIN LANGTON of 1, Barras Garth Road, Wortley, near
Leeds Mechanic, 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 consists of the addition of a round flat spring of steel or other
metal of suitable thickness and rather narrower than the thickness of the socket
of the pipe to be drawn, to prevent its locking or jambing between the part of the
core-box determining the inside diameter of the socket of the pipe and that part
of the size die determining the outside diameter thereof. The joint of the spring
is a half lap butt as shewn in the drawing accompanying the Provisional Specification
filed with this application for Patent. Letters of reference in this Specification
correspond with those in Provisional Specification and drawing aforesaid.
Fig. 1. shews the spring A. half way down the core-box E. which is tapered and
gradually expands the spring A. as is forced by the pressure of the clay on to
1

page_text: the increasing diameter of the core-box E. A bottom-plate C. having a recess in
the centre to clear the balanced ram carrying the core-box E. is attached by means
of rods B.
Fig. 2. is a plan;
Fig. 3. is a perspective view shewing the spring A. at the top of the core-box E.
in its normal position. In this position when attached to a clay cylinder of a pipe
drawing machine with size-die for determining the outside diameter of the pipe and
its socket it is ready to receive the clay from the cylinder above to form the socket
of the pipe. Pins projecting from the circumference of the flange on the bottom of
the core-box E. are, by a partial rotation of the core-box, brought to rest on the
☐ shaped heads of clutch bolts projecting downwards from the bottom of the
cylinder, size-die or other suitable part of the machine, thereby holding the core-
box E. firmly to the size-die. As the clay is pressed in to form the socket of the
pipe, the friction of the spring A. on the tapered surface of the core-box E., which
determines the inside diameter of the socket of the pipe, offers sufficient resistance
to keep it dense, close and solid, and thus avoid the cracked sockets which have
hitherto been so numerous on the smalle. sizes of pipes made by the old method,
owing to the clay not being evenly pressed in all round. When the pipe is drawn
to the requisite length, cut off and remove the bottom plate C. comes in contact
with the bed-plate of the machine and jerks the core-box E. down bringing the
spring A. to its normal position at the top again. In this position the whole is
raised to the bottom of the size-die again and secured by means of pins and clutch
bolts as before described ready for drawing the next pipe. Machines fitted with
this spring turn out twice as many pipes as without it, in addition to a saving
of 70 to 75% of oil used for lubricating the core-box.
Having thus fully described the nature and object of this my said invention I
would have it understood that what I claim is :-
:-
1. The spring A. as and for the purpose herein substantially set forth.
2. The combination of the spring A. with rods B. bottom plate C. and core-
box E. as and for the purpose herein substantially set forth.
Dated this Twenty-first day of February 1895.
BECK & INCHBOLD,
Agents.