Improvements in or relating to Moulds for Casting Balls of Glass or the like Material.
Year: 1894

page_text: Date of Application, 17th July, 1894
Complete Specification Left, 17th May, 1895-Accepted, 13th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to Moulds for Casting Balls of Glass or
the like Material.
I, JOHN SLAYTOR, of 33 Hallgate, Doncaster, in the County of York,
Gentleman, do hereby declare the nature of this invention to be as follows :—
My invention relates to metal moulds used for casting balls of glass or the like
material, and more especially to such moulds as are used in the manufacture of the
balls used in glass ball stopper bottles.
Hitherto in casting such balls the runners have usually been allowed to cool with
the balls attached to them so that when the latter are knocked off an irregular
surface is left at the point of fracture which necessitates subsequent grinding.
Now my invention has for its object improvements in or relating to moulds used for
casting such balls whereby the runners may be severed from the balls immediately
the moulds have been filled with molten metal and the balls subsequently allowed
to expand to the proper form at the point of severance and thereby greatly reduce
the necessity of any subsequent grinding.
For the purposes of my invention I form the recess in the two halves of the
mould as near as possible to their upper surfaces so that when the runner is severed
from the metal forced into them from a receptacle fixed on the sliding metal plate
level with said upper surface of the mould extremely little, if any, of the runners
remains attached to the balls.
The two halves of the mould so formed I arrange in a rectangular frame, one of
the halves being secured to the frame at one end thereof, and the other half
arranged to slide therein, so that said halves may be held together or separated by
operating the sliding half by means of a screw connected to it and passing through
one end of the frame, a suitable lever cam movement, or the like.
A metal plate is arranged to slide on the upper surface of the mould and is
held in position by screws passing through slots in it into the fixed half of the
mould, or in any other manner. Openings, preferably connected together by a
channel, are formed in this plate, and through these the metal may be forced into
the mould when the plate has been moved forward as far as possible by the
aid of a lever hinged to the fixed half of the mould, or other suitable means.
When the mould has been filled the plate is moved in the opposite direction and
the runners so severed from the balls. At the same time by so moving the plate
recesses in the under side thereof are brought over the opening in the mould and
the metal allowed to slightly expand and receive the proper form at the point where
the runners were severed after which the valves of the moulds may be separated
and the cast balls allowed to drop out.
When found desirable the moulds may be made hollow and water or other fluid
arranged to circulate through them.
Dated this 17th day of Jule 190.1
CASTLE SMITH,
Invention" Office, 54 Fleet Street, London, E.C.,
Agent for the, Applicant.

page_text: Improvements in or relating to Moulds for Casting Balls of Glass or
the like Material!
I, JOHN SLAYTOR, of 33 Hallgate, Doncaster in the County of Yorks,
Gentleman, 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 :-
My invention relates to metal moulds used for casting balls and other similar.
articles of glass, or the like material and more especially to such moulds as are used
in the manufacture of the balls used in glass ball stopper bottles.
Hitherto in casting such balls the runners have usually been allowed to cool
with the balls attached to them, so that when the latter are knocked off, an
irregular surface is left at the point of fracture, which necessitates subsequent
grinding.
Now my invention has for its object improvements in or relating to moulds' used
for casting such balls, whereby the runners may be severed immediately the moulds
have been filled with molten metal; thereby greatly reducing. the necessity of any
subsequent grinding.
For the purposes of my invention I form the recess in the two halves of the
mould as near as possible to their upper surfaces, so that when the runner is severed
from the metal forced into them, from a suitable receptacle, level with said upper
surface of the mould, extremely little, if any, of the runners remain attached to the
balls.
The two halves of the mould so formed I arrange on a rectangular frame or
plate, one of the halves being secured to this frame or plate at one end thereof, and
the other half arranged to slide therein so that said halves may be held together or
separated by operating the sliding half by means of a screw connected to it, and
passing through a projection ou one end of the frame or plate, a suitable lever, cam
movement, or the like.
A metal plate is arranged to slide on the upper surface of the mould and is held
in position by screws passing through slots in it into the fixed half of the mould, or
in any other manner. Openings; preferably connected together by a channel,.are
formed in this plate, and through these the metal may be forced into the mould
when the plate has been moved in the proper direction to admit of this.
When the mould has been filled, the plate is moved in the opposite direction and
the runners so severed from the balls, and the halves of the moulds then separated
and the cast balls allowed' to drop out.
When found desirable, the moulds may be made hollow and water, or other fluid,
arranged to circulate through them.
And in order that my invention' may be more readily understood and
carried into practice I will now proceed to describe the same with reference
to the accompanying drawings, of which Fig. 1 is a front elevation; Fig. 2
a plan, and Fig. 3 a side elevation of a mould, embracing the principal features
of my invention, prepared ready for casting, and Figs: 4 and 5 enlarged details
thereof.
To the plate or base a is pivoted a frame or plate b, supporting. the fixed and
sliding halves c, c', respectively of the mould, and capable of being secured in a
vertical position, as shown, by a rod'd engaging at one end with a pin or projection
on one side of said plate b and hinged at its opposite end to the plate a.
The sliding balf of the mould is guided by pins e³ (Fig. 4), and is operated by
a lever e, passing through a rod projecting from said half, and pivoted to the
plate b at f, whilst said half is retained in position during casting by a hinged
bar g engaging with a recess in the rod f.

page_text: On the face of the mould slides a plate h, held in position by suitable guides, and
connected to, and operated by, a lever k pivoted to the plate b. This plate has
formed in it counter-sunk openings corresponding, when the plate is forced
downwards, with the entrances to the recesses in the mould, of which there may be
any suitable number.
In operation the parts are arranged as shown, the molten metal then poured into
a receptacle I placed on a plate m resting on the base a and forced through an
opening in the side of this receptacle and the openings in the plate h into the
recesses in the mould in the usual manner.
The plate his then raised, so severing the runners at the entrances to the recesses
in the mould, which are made as shallow as possible, as shown in Fig. 5, and the
plate b subsequently turned into a horizontal position, and the parts of the
mould separated to allow the objects cast to escape through an opening in
the plate b.
Where found desirable, the severing plate h may be fixed and the two halves of
the mould made adjustable; whilst a plate carrying a mould may be pivoted to two
or more sides of the base a, and the parts of the moulds, and the severing plates,
operated automatically, or in any other manner found most suitable, or other
modifications might, as will be well understood, be introduced, without departing
from the principal features of my invention, and, although I prefer the arrangement
described above, I do not therefore confine myself solely to this.
my
Baid
Having now particularly described and ascertained the nature of
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. A mould for casting balls and similar articles of glass or the like material
provided with a fixed or movable plate adapted to sever the runner or runners from
the article or articles cast after the molten glass or other material has been forced
through one or more openings in it into the mould.
2. A mould for casting balls and similar articles of glass or the like material
consisting of a base plate a a plate 6 pivoted thereto and carrying the fixed and
adjustable halves c, c', of the mould and sliding plate h the whole constructed
arranged and operated substantially as described and illustrated in the accompanying
drawings.
Dated this 17th day of May 1895.
CASTLE SMITH,
"Invention" Office, 54 Fleet Street, London, E.C.,
Agent for the Applicant.
CASTLE SMITH,
"Invention" Office, 54 Fleet Street, London, E.C.,
Agent for the Applicant.