Improvements in or connected with Moulds for Casting Ribbed Metallic Plates, more especially intended for use for Casting Plates for Secondary Batteries.
Year: 1892

page_text: Date of Application, 6th Apr., 1892
Complete Specification Left, 29th June, 1892-Accepted, 30th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Moulds for Casting Ribbed
Metallic Plates, more especially intended for use for Casting
Plates for Secondary Batteries.
I ANTHONY SPENCER BOWER of St. Neots in the County of Huntingdon
Engineer do hereby declare the nature of this invention to be as follows :-
--
My invention relates to mould such as are described in the Specification of my
application for Letters Patent No. 11,630 of 8th July 1891.
According to my present invention I make the matrices of the mould so that
they can be adjusted to give any required thickness of backbone, or body part of
the plate, or to give no such backbone so that the plate then consists of a number
of strips joined together at the sides or edges of the plate which they constitute.
With this object I mount the matrices in the parts of the casing or frame of the
mould so that they can be moved inwards which movement may be effected by
screws passed through screwed holes in the parts of the casing or frame and
bearing on the backs of the matrices. In order to allow of the expansion of the
matrices which occurs when the molten metal is introduced into the mould, I
provide a rib on the portion of the casing or frame to which the parts thereof are
hinged which projection constitutes the foot of the moulding space. On either
side of this rib are spaces in which are contained strips upon which springs bear
to support the matrices so as to give a tight joint but allow the matrices to expand
when subjected to the heat of the molten metal without causing injury to the
mould.
Where feet or lugs for making the electrical connections of the plates are to be
cast on the plates, I make in the mould recesses corresponding to such feet or lugs
or both and to ensure the escape of gas or air so that no bubbles occur in the cast
plate I make a riser or risers or a passage or passages opening from the lower part
of the moulding space or from the recesses for casting the feet or lugs and running
upwards and opening at the upper part of the mould so that gas or air will pass
out by this riser or these risers. The push pieces or strips by which the cast plate.
and matrix or matrices are separated as described in my aforesaid Specification I
make with as far as practicable a continuous rib to bear against the metal of the
cast plate preferably against a thickened part of the cast metal which is cast in
an enlargement at the "get" or inlet for the molten metal and to ensure a proper
distribution of the metal into all the grooves of the matrix, or matrices I
make in the edge of the said push pieces or strips a longitudinal groove or channel
opening above all the spaces between the ribs of the matrix or matrices.
The passage for the molten metal into this groove or channel in the push piece,
or strip, I make through preferably about the centre of the rib which bears
upon the cast metal to separate the matrix or matrices and the cast plate from
each other.
I prefer to oxidize the matrices which is conveniently effected by what is known
as the Bower-Barff process.
at dan of Anvil 1800
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with Moulds for Casting Ribbed
Metallic Plates, more especially intended for use for Casting
Plates for Secondary Batteries.
I ANTHONY SPENCER BOWER of St. Neots in the County of Huntingdon
Engineer do hereby declare the nature of my said 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 moulds for casting ribbed metallic plates such as are
described in the Specification of my application for Letters Patent No. 11,630
of 8th July 1891.
In order to illustrate the improvements constituting my present invention I
will refer to the accompanying drawings which shew a mould constructed
according to my present invention.
Figure 1 is a side elevation and Figure 2 is a vertical section of the mould.
Figure 3 shews the mould opened out.
Figure 4 is a detail as hereinafter described.
According to my present invention I make the matrices of the mould, so that
it can be adjusted to give any required thickness of backbone, or body part of
the plate from which the ribs project or to give no such backbone so that the
plate then consists of a number of strips joined together at the sides or edges of
the plate which they constitute. With this object I mount the matrices 2 in the
parts of the casing or frame of the mould 1 so that they can be moved inwards;
which movement may be effected by screws 3 passed through screwed holes in the
parts of the casing or frame and bearing on the backs of the matrices. In order
to allow of the expansion of the matrices which occurs when the molten metal is
introduced into the mould, I provide a rib 4 on, the portion 5 of the casing, or
frame, to which the parts 1 thereof are hinged which projection constitutes the
foot or bottom of the moulding space. On either side of this rib are spaces in
which are contained strips 6 upon which springs 7 bear to support the matrices 2
so as to give a tight joint but allow the matrices to expand when subjected to the
heat of the molten metal without causing injury to the mould. Where feet or
lugs for making the electrical connections of the plates are to be cast on the
plates I make, in the mould recesses corresponding to such feet, or lugs, or both,
and to ensure the escape of gas or air so that no bubbles occur in the cast plate
I make a riser or risers or a passage or passages as at 8 opening from the lower
part of the moulding space or from the recesses for casting the feet or lugs and
running upwards and opening at the upper part of the mould so that gas or air
will pass out by this riser or these risers. The push pieces or strips 14 by which
the cast plate is separated from the matrix or matrices as described in my afore-
said Specification I make with (as far as practicable) a continuous rib to bear
against the metal of the cast plate preferably against a thickened part of the
cast metal which is cast in an enlargement at the "get"
" or inlet for the molten
metal and to ensure a proper distribution of the metal into all the grooves of the
matrix or matrices, I make in the edge of the said push pieces or strips, a longi-
tudinal groove or channel 9 opening above all the spaces between the ribs of the
matrix or matrices. The passage 10 for the molten metal from the "get". 11
into this groove or channel, in the push piece or strip I make through preferably
about the centre of the rib 12 which bears upon the cast metal to separate
the matrix or matrices, and the cast plate (shewn at 13) from each other.
Figure 4 is a perspective view of one of the push pieces illustrating this more
clearly.
I prefer to oxidize the matrices which is conveniently effected by what is known
as the Bower Barff process.

page_text: 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 :-
1. In moulds for casting ribbed plates a matrix or matrices mounted in a casing
or frame and capable of being adjusted in the said casing or frame, and of being
fixed in its or their adjusted position for giving different thicknesses of backbone
or body part or no backbone or body part as desired substantially as hereinbefore
described.
2. In moulds for casting ribbed plates a matrix or matrices mounted in a casing
or frame in combination with strips and springs arranged to give a tight joint but
allow of expansion of the matrix or matrices when the molten metal is introduced
substantially as herein before described.
3. In moulds for casting ribbed plates a riser or risers or passage or passages
opening from the lower part of the moulding space or recesses for casting the feet
or lugs so that gas or air will pass out and bubbles in the casting be prevented
substantially as hereinbefore described.
4. In moulds for casting ribbed plates a push piece or push pieces or strip or
strips having therein a longitudinal channel opening into the spaces between the
ribs of the matrix or matrices substantially as and for the purpose hereinbefore
described.
201 1
ITBY
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.