IMPROVEMENTS IN THE MANUFACTURE OF PATTERN OR MOULDING PLATES PROVISIONAL SPECIFICATION USED IN MAKING MOULDS FOR CASTING ME
Year: 1874

page_text: LETTERS PATENT to Arthur Chamberlain, of Birmingham, in the
County of Warwick, Manufacturer, and James Smith, of Bir-
mingham, aforesaid, Foreman of Brass Workers, for the Invention
of "IMPROVEMENTS IN THE MANUFACTURE OF PATTERN OR MOULDING PLATES
PROVISIONAL SPECIFICATION left by the said Arthur Chamberlain and -
James Smith at the Office of the Commissioners of Patents, with
their Petition, on the 2nd May 1874.
We, ARTHUR CHAMBERLAIN, of Birmingham, in the County. of
Warwick, Manufacturer, and JAMES SMITH, of Birmingham, aforesaid,
Foreman of Brass Workers, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE MANUFACTURE OF PATTERN OR MOULDING
PLATES USED IN MAKING MOULDS FOR CASTING METALS," to be as follows:-
The said pattern or moulding plates consist of plates having on one
or both faces a series of half patterns of the articles. to be cast, the said
pattern or moulding plates being ordinarily made by taking a plate and

page_text: fixing upon its face or faces the half patterns. In this the ordinary
method of producing the said pattern or moulding plates the adjusting
of the position of the half patterns on the plates is attended with
difficulty, and hence there is sometimes a want of uniformity between
two half moulds of the same articles made from different pattern plates,
or from patterns on the opposite sides of the same plate.
Our Invention consists in manufacturing the said pattern or moulding
plates in the manner herein-after described, whereby the said plates are
readily and economically made, and the half patterns upon them are
very accurately arranged.
According to our Invention we make the said pattern or moulding
plates either by casting both the plate and the patterns in one piece or
by casting the patterns upon a prepared plate.
When the patterns are to be cast upon a plate we take a copper or
other metallic plate, the surface of which has been tinned, and we mould
in an ordinary sand mould the half patterns of the articles to be cast.
The tinned plate being placed in the mould box with the half mould
upon it fused tin or an alloy of tin and lead or other easily fused metal
or alloy is run into the mould. There is thereby produced a pattern or
moulding plate having on one face the half patterns of the articles to
be cast, together with the necessary "gets," the cast patterns and "gets"
adhering firmly to the tinned surface of the plate. Or half patterns on
opposite sides of the plate may be cast simultaneously in a similar way.
The half patterns may be made of iron instead of tin or other soft metal.
In this case an uncoated iron plate is used, and on this iron plate the
half patterns and "gets are cast. After the casting process the plate
with the slightly attached castings upon it is plunged for a short time
in a bath of melted tin, whereby the whole becomes coated with tin and
the patterns are firmly attached to the plates.
"
When we make the plate and patterns in one piece by casting, the
half patterns are moulded, as before described, and placed in an open
casting box. By pouring fused metal into the said open box a plate
of the required thickness with the half patterns upon one face of it is
produced. When the half patterns are to be produced on opposite sides
of the cast plate two half moulds are taken and so adjusted that the
distance between them is equal to the thickness of the plate to be cast..

page_text: By the casting process a pattern or moulding plate is produced having the
half patterns on opposite sides.
Our Invention is particularly applicable to the making of the pattern
or moulding plates used in moulding the half moulds in which small
articles are cast, such as are commonly cast by brass founders, iron
founders, gas and water fittings manufacturers, and others.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Arthur Chamberlain and James Smith in the
Great Seal Patent Office on the 24th October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ARTHUR
CHAMBERLAIN, of Birmingham, in the County of Warwick, Manu-
facturer, and JAMES SMITH, of Birmingham, aforesaid, Foreman of Brass
Workers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by. Her
Letters Patent, bearing date the Second day of May, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Arthur Chamberlain and James Smith,
Her special. license that we, the said Arthur Chamberlain and James
Smith, our executors, administrators, and assigns, or such others as
we, the said Arthur Chamberlain and James Smith, our executors,
administrators, and assigns, should at any time agree with and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE MANU-
FACTURE OF PATTERN OR MOULDING PLATES USED IN MAKING MOULDS FOR CASTING
METALS," upon the condition (amongst others) that we, the said Arthur
Chamberlain and James Smith, our executors or administrators, by an
instrument in writing under our or their hands and seals, or under
the hand and seal of one of us or them, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the

page_text: Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Arthur Chamberlain, on behalf of
myself and the said James Smith, do hereby declare the nature of the
said Invention, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following state-
ment thereof, that is to say:-
The said pattern or moulding plates consist of plates having on one
or both faces a series of half patterns of the articles to be cast, the said
pattern or moulding plates being ordinarily made by taking a plate and
fixing upon its face or faces the half patterns. In this, the ordinary
method of producing the said pattern or moulding plates, the adjusting
of the position of the half patterns on the plates is attended with
difficulty, and hence there is sometimes a want of uniformity between
two half moulds of the same articles made from different pattern plates,
from patterns on the opposite sides of the same plate..
ΟΙ
Our Invention consists in manufacturing the said pattern or moulding
plates in the manner herein-after described, whereby the said plates are
readily and economically made, and the half patterns upon them are
very accurately arranged.
According to our Invention we make the said pattern or moulding
plates either by casting both the plate and the patterns in one piece
or by casting the pattern upon a plate.
When the pattern or moulding plate is to be made by casting the
patterns upon the face or faces of a plate we take a copper or other
metallic plate, the surface of which has been tinned, and we mould in:
an ordinary sand mould the half patterns of the articles to be cast.
The tinned plate being placed in the mould box with the half mould
upon it, fused tin or an alloy of tin and lead or other easily fused metal.
or alloy is run into the mould. There is thereby produced a pattern a
or moulding plate having on one face the half patterns of the articles
to be cast, together with the necessary "gets," the cast patterns and
gets adhering firmly to the tinned surface of the plate. Or half patterns
on opposite sides of the plate may be cast simultaneously in a similar
way. Or instead of casting the half patterns simultaneously on opposite
sides of the plate the half patterns cast on one side of the plate may be
used for moulding the half patterns to be cast on the opposite side of

page_text: LIVICS Care made at the corners of the plate a for the purpos
after explained.
Figure 5 represents in plan one of the half moulding boxes which.
we employ in moulding with a pattern or moulding plate made according
to our Invention.
Figure 6 represents partly in section and partly in elevation the two
half moulding boxes, and shows the position of the pattern plate
between them; and Figure 7 represents a complete mould ready for
casting.
In order to obtain great accuracy the half moulds moulded from the
pattern plate å, Figure 6, the faces of the moulding boxes which bear
against the said pattern plate are planed very truly, and in addition to
the ordinary pegs and snugs at e on the half moulding boxes f, g, for
holding them firmly together during the moulding and casting operations,
we make in the corners of the half moulding box f holes i which take
upon studs or projections k on the corners of the other half moulding
box g (see Figure 7). When the pattern or moulding plate d is placed
upon the lower half mould g, as in Figure 6, the studs or projections /
take into the holes c, Figure 5, in the corners of the said pattern plate,
and the position of the said pattern or moulding plate is thereby
accurately and readily determined. When the pattern plate has thus
been fitted upon the half moulding box the upper half moulding box
is placed upon it and fixed by the pegs and snugs at e, when sand is
rammed in the said half moulding box fand the pattern moulded from
the upper side of the pattern plate d in the ordinary manner.
9
Having moulded the required number of half moulds from the upper
face of the pattern plate d the moulding boxes are inverted and half
moulds are now moulded from the opposite face of the pattern plate d.
Figure 7 represents in section two half moulds, made as described,.
combined together for casting, the ordinary cores having been placed in
those parts of the mould which require to be cored.
Our Invention is particularly applicable to the making of the pattern
or moulding plates used in moulding the half moulds in which small
articles are cast, such as are commonly cast by brass founders, iron
founders, gas and water fittings manufacturers, and others.

page_text: Having now described the nature of our Invention, and the manner
in which the same is to be performed, we wish it to be understood that
we do not limit ourselves to the precise details herein described, as the
same may be varied without departing from the nature of our Invention,
but we claim as our Invention the improvements in the manufacture of
pattern or moulding plates used in making moulds for casting metals,
herein before described and illustrated in the accompanying Drawings,
that is to say, making the said pattern or moulding plates by casting
the half patterns upon one face or upon both faces of a metallic plate,
substantially as described, or by casting both the plate and half patterns
in one piece, the said half patterns being made on one or on opposite
sides of the cast plate, substantially as described.
In witness whereof, I, the said Arthur Chamberlain, have here-
unto set my hand and seal, this Twenty-first day of October, in
the year of our Lord One thousand eight hundred and seventy-
four.
Witness,
GEORGE SHAW.
ARTHUR CHAMBERLAIN. (L.S.)