Improvements in Machinery and Apparatus for Casting and Moulding Metals.
Year: 1890

page_text: Date of Application, 7th July, 1890
Complete Specification Left, 7th Apr., 1891-Accepted, 30th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Machinery and Apparatus for Casting and
Moulding Metals.
WILLIAM HENRY THOMPSON Engineer Church Lane Old Charlton Kent do
hereby declare the nature of this invention to be as follows:-
My invention has for its object improvements in machinery or apparatus for
casting and moulding metals and is more particularly adapted to the production of
castings of a spherical or globular form by imparting such a movement to a mould
charged with molten or liquid metal as to cause the heavier part of such metal to
impinge on the surface of the mould with a pressure according to the velocity of
the motion or movement imparted to it and so operate as to force the air scoria
and other lighter bodies or impurities to the centre or interior surface of the
casting.
In carrying my invention into practice the mould (or frame on which it may be
carried) is operated by forming a working connection with two rotating semicircular
frames or carriages to which it is connected by being provided with four trunnions
or studs arranged equidistant and at points opposite each other, two of the trunnions
that are at opposite points are held in bearings arranged on one of the semi-circular
frames and the other two trunnions are similarly connected to the second semi-
circular frame aforesd. both of these frames or carriages are provided with shafts
arranged at suitable angles and mounted on convenient bearings and fitted with
pulleys or other driving mechanism for imparting to them the necessary rotating
motion which by their connection with the mould at its cardinal points will impart
to it such a circular and radial movement on its several axis or trunnions as will
cause the molten or liquid metal to impinge on its surface as aforesd.
The trunnions carriage frames or shafts may be arranged at or adjustable to any
point or angle or be of any form most suitable for meeting variations in the
character of the castings or for obtaining the best working results.
In another arrangement of my invention I employ a vertical frame (hereinafter
called the main frame) in which is arranged two bearings carrying a vertical shaft
the upper end of which extends beyond the bearing so as to admit of its being fitted
with a semi-circular frame or carriage provided with two bearings arranged
horizontally or at right angles with those carrying the vertical shaft. The mould
or the frame carrying the mould is arranged with two trunnions or studs (herein-
after called the trunnions) which take their bearing in the aforsd. horizontal
bearings and support the mould in such a manner as to admit of its having a rotary
motion imparted to it by a bevel wheel attached to one of the aforsd. trunnions and
gearing into and running round a fixed bevel wheel or circular rack attached to the
main frame. The lower end of the aforsd. vertical shaft is fitted with a bevel or
mitre wheel gearing into a similar wheel on the end of an horizontal shaft which is
provided with suitable bearings and driving pulley for transmitting a rotating
motion (through the medium of the sd. mitre wheels) to the aforsd. vertical shaft
which by its connection with the mould or the frame supporting the mould causes
it to be carried round and so revolving the sd. mould on its vertical axis which
motion causes the bevel wheel aforsd. attached to one of the trunnions to act on the
fixed wheel or rack in such a manner as to impart a rotating motion to the mould
on its horizontal axis the combined movements revolving the mould on both its axis
at the same time in such a manner that the force resulting from its circular motions
will cause the molten or liquid metal with which the mould is charged to impinge
on its surface as aforesd.

page_text: When it is found desirable to encase the mould while it is in operation I arrange
the carriage or frame supporting it in the form of a basin with a moveable cover of
similar formation.
The mould may be made in two parts dividing it at or as near the centre line as
convenient having a lug or projection on each side forming part of the trunnion or
trunnions in such a manner that a ring or collar may be set over with a nut working
on a thread on the trunnion or other suitable device for keeping the mould closed
or sealed while in operation--the aforsd. mould may be arranged in several parts
and closed or sealed by pressure being brought to act on the mechanism or
trunnions so as to keep the mould sealed or closed while in operation—it may
also be sealed or closed by a suitable arrangement of screw dogs metal bands
or bolts.
1000
COMPLETE SPECIFICATION.
Improvements in Machinery and Apparatus for Casting and
Moulding Metals.
WILLIAM HENRY THOMPSON Engineer 155 Fenchurch Street London 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 has for its object improvements in machinery or apparatus for
casting or moulding metals and is more particularly adapted to the production of
casting of a spherical or globular form by imparting such a movement to a mould
charged with molten or liquid metal as to cause the heavier part of such metal to
impinge on the surface of the mould with a pressure according to the velocity of
the motion or movement imparted to it and so operate as to force the air scoria and
other objectionable matter or lighter bodies or impurities to the centre or interior
surface of the casting.
In carrying my invention into practice the mould (or the frame on which it may
be carried) is operated by forming a working connection with two rotating semi-
circular frames or carriages to which it is connected by being provided with four
trunnions or studs arranged equidistant and at points opposite each other two of
the trunnions that are at opposite points are held in bearings arranged on one of
the semicircular frames and the other two trunnions are similarly connected to the
second semicircular frame aforesd. both of which frames or carriages are provided
with shafts arranged at suitable angles and mounted on convenient bearings and
fitted with pulleys or other driving mechanism for imparting to them the necessary
rotating motion which by their connection with the moulds at its cardinal points
will impart to it such a circular and radial movements on its several axis or
trunnions as will cause the molten or liquid metal to impinge on its surface as
aforesd.
The trunnions carriage frames or shafts may be arranged at or adjustable to any
point or angle or be of any form most suitable for mecting variations in the
character of the castings or for obtaining the best working results.
In another arrangement of my invention I employ a vertical frame (hereinafter
called the main frame) in which is arranged two bearing carrying a vertical shaft
the upper end of which extends beyond the bearing so as to admit of it being fitted
with a semicircular frame or carriage provided with two bearings arranged
horizontally or at right angles with those carrying the vertical shaft. The mould
or the frame carrying the mould is arranged with two trunnions or studs (herein-
after called the trunnions) which take their bearings in the aforesd. horizontal
bearings and supports the mould in such a manner as to admit of its having a
rotary motion imparted to it by a bevel wheel attached to one of the aforesd.

page_text: trunnions and gearing into and running round a fixed bevel wheel or circular rack
attached to the main frame. The lower end of the vertical shaft is fitted with a
bevel or mitre wheel gearing into a similar wheel on the end of an horizontal shaft
which is provided with suitable bearings and driving pulleys for transmitting a
rotating motion (through the medium of the said mitre wheels) to the aforesd.
vertical shaft which by its connection with the mould or the frame supporting the
mould causes it to be carried round and so revolving the mould on its vertical axis
which motion causes the bevel wheel aforesd. attached to one of the trunnions to
act on the fixed wheel or rack in such a manner as to impart a rotating motion to
the mould on its horizontal axis the combined movements revolving the mould on
both its axis at the same time so that the force resulting from its circular motions
will cause the molten or liquid metal with which the moulds is charged to impinge
on its surface as aforesd.
When it is found desirable to encase the mould while in operation I arrange the
carriage or frame supporting it in the form of a basin with a movable cover of
similar formation.
The mould may be made in two parts dividing it at or as near the centre line as
convenient and having a lug or projection on each side forming part of the trunnion
or trunnions in such a manner that a ring or collar may be set over it with a nut
working on a thread on the trunnion or other suitable device for keeping the mould
closed or sealed while in operation.
The mould may be arranged in several parts and closed or sealed by pressure
being brought to act on the mechanism or trunnions so as to keep the mould sealed
or closed while in operation it may also be sealed or closed by a suitable
arrangement or screw dog or bolts.
Fig. 2 & plan or machine.
Fig. 3 section of mould at A.
Fig. 4 plan of upper and under surface of lower portion of mould at A.
Fig. 5 is upper and under surface of mould at B.
Fig. 6 is upper and under surface of mould at C.
The trunnions or studs (which may be cast with the mould) are shown
at D & D 1-E & El the semicircular frames or carriages-F and F1 are the
shafts G & G 1 the bearings-H driving pulley-I lower portion of cover―J the
upper portion of cover the object of which is to provide a protection for the operative
against any leakage that might occur at the mould.
The operation is as follows-A rotary motion is imparted to the shaft F and the
carriage or frame E by means of a belt on pulley H causing the mould to revolve
and receive a further axial or rotating movement by means of its connection with
the frame or carriage E1 and shaft F1-the speed at which it is driven being
sufficient to insure the molten metal with which the mould is charged impinging on
its surface the motion being kept up until the metal is set or cooled when it is
released as a casting by removing the bolts M-and slacking the nuts L & so as to
radiate the carriage or frame E clear of the mould.
Sheet 2 Fig. 1 is an elevation and Fig. 2 a plan of a machine for imparting a
rotary motion to the mould on two axis.
The operation is as follows-A rotary motion is imparted to the vertical shaft B
by means of the bevel wheels C & C 1 and pulleys D & D 1 the carriage carrying
the mould on the upper end of the vertical shaft is arranged with two bearings
& G 1 in which the trunnions N N of the mould take their bearing having a rotary
motion imparted to them by their connection with the bevel wheel gearing into
the circular rack E in such a manner that while it is carried round with the vertical
shaft and carriage it imparts a rotary motion to the mould on its horizontal axis
which thus receives a revolving motion on both its axis at the same time the object

page_text: of which is to cause the molten metal to impinge on its surface as hereinbefore
mentioned the casting being released by running back the nuts I-I and so
releasing the collars J which hold the two halves of the mould together as shown
in enlarged view Fig. 3.
Fig. 4 is a diagram showing the method of sealing the mould by radiating its
two halves and thrusting or holding them together by means of the pressure of
two set screws D & D 1.
Having now described and ascertained the nature of my invention and in what
manner the same is to be performed I declare what I claim is
The arrangement and combination of machinery or apparatus for supporting or
holding in position and imparting an axial or rotating motion to a mould or moulds―
also, encasing such mould or moulds when in operation-substantially in the manner
and for the purposes herein described and shown in Sheets 1 and 2 of the drawings
hereto annexed.
WM. H. THOMPSON.