IMPROVE- MENTS. IN DIES FOR MOULDING PLASTIC MATERIALS
Year: 1852

page_text: LETTERS PATENT to James Armitage, of Bury, in the County of
Huntingdon, Machine Maker, and Charles Thaxter, of Fenton,
in the same County, Brick Maker, for the Invention of "IMPROVE-
MENTS. IN DIES FOR MOULDING PLASTIC MATERIALS."
Sealed the 30th April 1853, and dated the 23rd November 1852.
PROVISIONAL SPECIFICATION left by the said James Armitage
and Charles Thaxter at the Office of the Commissioners of
Patents, with their Petition, on the 23rd November 1852.
We, JAMES ARMITAGE, of Bury, in the County of Huntingdon,
Machine Maker, and CHARLES THAXTER, of Fenton, in the same
County, Brick Maker, do hereby declare the nature of the said In-
vention for "IMPROVEMENTS IN DIES FOR MOULDING PLASTIC MATERIALS,"
to be as follows:-
This Invention has special reference to the moulding of perforated
or hollow bricks for building purposes, and consists of an arrange-
ment of die whereby the required perforations are made in or
through the broad side of the brick, whilst the plugs or core pieces
which form the openings as the clay is expressed from the machine

page_text: are held in position by means of core spindles or bars of equal length.
According to one modification of this die, the perforations, 20
in number, are in two parallel rows, running from end to end of the
brick, such holes being produced by corresponding rows of cores or
plugs held up by core spindles of uniform length; such form or
arrangement of perforations may, however, be varied, as will be
obvious to the practical brick maker.
SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said James Armitage and Charles Thax-
ter in the Great Seal Patent Office on the 23rd May 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we,
JAMES ARMITAGE, of Bury, in the County of Huntingdon, Machine
Maker, and CHARLES THAXTER, of Fenton, in the same County, Brick
Maker, send greeting,
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent bearing date the Twenty third day of November, in
the year of our Lord One thousand eight hundred and fifty two, in
the sixteenth year of Her Reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said James Armitage and Charles
Thaxter, Her special license that we, the said Jaines Armitage and
Charles Thaxter, our executors, administrators, and assigns, or
such others as we, the said James Armitage and Charles Thaxter,
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,
uise, exercise, and vend within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN DIES FOR MOULDING PLASTIC MATERIALS," upon the
condition (amongst others) that we, the said James Armitage and
Charles Thaxter, by an instrument in writing under our hands and
seals, should particularly describe and ascertain the nature of the
said Invention and in what manner the same was to be performed,

page_text: and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that we, the said James Armitage and Charles
Thaxter, do hereby declare the nature of our said Invention and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being
had to the accompanying Drawing, and to the letters and figures
marked thereon (that is to say):
Our said Invention relates to an improved construction of
die for producing perforated or hollow bricks, and consists in employ-
ing a die fitted with a number of cores, which are held in proper
position by a series of core spindles of uniform length, these core
spindles being secured to suitable transverse supporting bars formed
on to, or secured to, the back of the die plate.
い。
The die is so formed, that the perforations will be made through
the broad side of the brick, the clay or other plastic material being
expressed from the machine by any of the methods at present in use.
Figure 1, on the accompanying sheet of Drawings, represents a front
elevation of an improved dic as fitted with twenty cores; Figure
2, is a corresponding vertical section of the same; and Figure 3, is a
corresponding plan. A, is the face of the die, which may be con-
structed of cast iron; a rectangular opening is cast in the centre of
it, which corresponds in size to the flat or broad side of a brick.
The plugs or cores B, B, are supported in their positions by the
core spindles C, C. These spindles are all of uniform length, and
are firmly secured at their inner extremities to the two supporting
bars D, D, formed on to the back of the die.
By the employment of dies of the construction herein.before de-
scribed, the weight of the bricks will be considerably reduced, and
their manufacture by machinery effected with greater facility and
economy than has hitherto been accomplished by the ordinary means.
Having now described and particularly ascertained the nature of
our said Invention, and the manner in which the same is or may be
used or carried into effect, we would observe, in conclusion, that we

page_text: do not confine or restrict ourselves to the precise details or arrange-
ments which we have had-occasion to describe or refer to, as many
variations may be made therefrom, without deviating from the prin-
ciples or main features of our Invention; but what we consider to be
novel and original, and, therefore, claim as the Invention secured to
us by the herein-before in part recited Letters Patent is,--
First, the application and use of dies of the general arrangement
and construction herein-before described; and,
Second, the application and use of dies containing core spindles
of uniform length as herein-before described.
In witness whereof, we, the said James Armitage and Charles
Thaxter, have hereunto set our hands and seals, the Twenty
first day of May, One thousand eight hundred and fifty
JAMES ARMITAGE.. (L. S.)
CHARLES THAXTER. (L. s.)
JAMES ARMITAGE.
(L. S.)
CHARLES THAXTER. (L. S.)