Year: 1885

page_text: I OLIVER TITCHENER, of 8 Wilmington Street, Clerkenwell in the county of
Middlesex Type Founders' Tool Maker do hereby declare the nature of this
invention to be as follows:
This invention relates to further improvements in the machines for casting
hollow quods or quotations for which Letters Patent were granted to me dated
the 1st day of April 1884 N° 5,795.
In constructing such machines I have found that by the employment of powerful
springs for keeping the core firmly pressed to the face of the mould in order to
resist the force of the metal and to allow of it being set flat to the face of the
mould as described in the specification of my said former Letters Patent considerable
resistance was offered to the operation of the machine which consequently required
a large expenditure of power to work the same.
Now my present improvements consist in producing the necessary pressure to
resist the force of the metal by the employment of a lining bar such as is usually
employed in machines for casting type whereby much weaker springs can be used
for setting the core in position.
.
For this purpose I mount the. lining bar on the machine in the manner usual
with machines for casting type and on a suitable part of the side frame of the
machine is placed a pivoting stop actuated by a cam on the driving shaft of the
machine in such a manner as to raise it to receive the tail of the lining bar when
the mould is closed and thereby cause the necessary pressure on the core;
immediately however the metal has been forced into the mould the said stop is
allowed by the cam to fall and release the lining bar which is then free to move to
the required extent to allow the core to be fully withdrawn from the mould.
By this means only a slight momentary resistance is offered to the action of the
machine in resisting the pressure of the metal and ordinary lining springs such as
are used in type casting machines will be found of sufficient strength to set the
core in its proper position.

page_text: ↓
Improvements in or Applicable to Type-casting Machines.
I OLIVER TITCHENER of 3 Wilmington Street, Clerkenwell, in the county of
Middlesex, Type Founders' Tool Maker 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 further improvements in the machines for casting
hollow quods or quotations for which Letters Patent were granted to me dated
the 1st day of April 1884 N° 5,795.
In constructing such machines I have found that by the employment of powerful
springs for keeping the core firmly pressed to the face of the mould in order to
resist the force of the metal and to allow of it being set flat to the face of the
mould as described in the specification of my said former Letters Patent con-
siderable resistance was offered to the operation of the machine which consequently
required a large expenditure of power to work the same.
Now my present improvements consist in producing the necessary pressure to
resist the force of the metal by the employment of a lining bar such as is usually
employed when casting type whereby much weaker springs can be used for setting
the core in position.
For this purpose I mount the lining bar on the machine in the manner usual
with machines for casting type and on a suitable part of the side frame of the
machine is placed a pivotting stop actuated by a cam on the driving shaft of the
machine in such a manner as to raise it to receive the tail of the lining bar when
the mould is closed and thereby cause the necessary pressure on the core;
immediately however the metal has been forced into the mould the said stop is
allowed by the cam to fall and release the lining bar which is then free to move
to the required extent to allow the core to be fully withdrawn from the mould.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 is a front
elevation and figure 2 a section on line A, B of figure 1 shewing the bottom mould
block of a type casting machine suitable for casting hollow quods or quotations
and having my present improvements applied thereto; figure 3 is a sectional side
elevation of part of figure 1. Similar letters in all the figures represent similar
parts.
a, represents the lining bar such as is usually employed in machines for casting
type and which by my improvements I am enabled to employ when casting hollow
quods and quotations in order to produce the necessary pressure to resist the force
of the metal in the mould; b, is the spring for setting the core o, in position,
which spring by the use of the said lining bar a, can be employed of much less
strength than was necessary in the machine for casting hollow quods and
quotations described in the specification of my said former Letters Patent; the
lining bar is mounted on a pivot d, to the bottom mould block in the manner
usual with machines for casting type; e, is the pivotting stop mounted on the side
frame (not shewn in the drawing) of the machine, f, being the pivot of the same;
g, is the cam fixed on the driving shaft h, of the machine for actuating the stop e,

page_text: which is formed at its heaviest end with an upward projection i, for receiving the
screwj, or other suitable projection on the tail of the lining bar a, when the mould
is closed and the stop e, has been raised by the cam g, into the position shewn in
full lines in figure 3 thereby causing the necessary pressure on the core c; the
dotted lines in figure 3 shew the position of the parts immediately after the metal
has been forced into the mould when the end of the stop e, having the projection i,
is allowed to fall by the cam g, as it rotates and the lining bar a, is thereby
released from contact with the spring b, for the purpose herein before described; as
the cam g, continues to rotate the pivotting stop e, will be again gradually brought
into position to receive the tail of the lining bar a, as the mould is being closed
and so on.
By my improvements only a slight momentary resistance is offered to the action
of the machine in resisting the pressure of the metal and ordinary lining springs b,
such as are used when casting type will be found of sufficient strength to set the
core c, in its proper position.
my
Having now particularly described and ascertained the nature of said
invention and in what manner the same is to be performed I declare that what
I claim is:
1. In a type casting machine when used for casting hollow quods or quotations
the employment of a lining bar in combination with suitable means such as those
described for allowing the said bar to move to the required extent to permit the
core to be fully withdrawn from the mould substantially as hereinbefore described.
2. In a type casting machine adapted for use for casting hollow quods and
quotations the combination with a lining bar of a pivotting stop operated by a
cam on the driving shaft of the machine substantially as and for the purpose
herein before described and represented in figures 1 and 3 of the accompanying
drawing.