IMPROVEMENTS IN THE MANUFACTURE OF METALLIC SAFES. AND STRONG. ROOMS, AND. IN. APPARATUS. CONNECTED. THEREWITH
Year: 1865

page_text: LETTERS PATENT: to Samuel Chatwood, of Bolton, in the County of
Lancaster, Safe Engineer,. for. the Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF METALLIC SAFES. AND STRONG. ROOMS, AND. IN. APPARATUS.
CONNECTED. THEREWITH."
Sealed the 2nd January. 1866, and dated the 2nd September 1865.
PROVISIONAL SPECIFICATION left by the said Samuel Chatwood at
the Office of the Commissioners of Patents, with his Petition, on the
2nd September. 1865.
I, SAMUEL CHATWOOD,. of. Bolton,. in the County of Lancaster, Safe
Engineer, do hereby declare the nature of the said Invention for "IMPROVE--
MENTS IN THE MANUFACTURE OF METALLIC SAFES AND STRONG ROOMS, AND IN
APPARATUS CONNECTED THERE WITH," to be as follows:-
My Invention has for its chief object the manufacture of safes, strong.
rooms, and doors, of an arrangement. of hard or brittle metal and soft or
ductile metal, both cast of the desired form or shape, and one cast on the
other.
I run into moulds of the required form for safes or parts of safes for strong.
rooms, or parts of strong rooms, and for doors or parts of doors any hard, or
brittle metal, and produce castings having projections or indentations, or holes.
or perforations of any form or shape on or in those parts intended to be
coated over with, or cast on, or surrounded with soft or ductile metal, which
is cast on the hard or brittle metal in a molten state and in suitable moulds
for the purpose.

page_text: The arrangement of the metals may be hard or brittle inside the safe room
or door, and soft or ductile outside, or the reverse, also soft or ductile metal
between hard or brittle metal, or hard or brittle metal between soft or ductile
metal.
To prevent detrimental strain by the contraction of the metal cast on the
other metal, I take the first casting as soon as the metal is set and while it is
still in a hot state, and place it-in-a-mould prepared for it, and-run the other
metal in a molten state upon it, so that when they cool together the tensile
property of the last-named metal will not be much decreased in any of its
parts or fractured by contraction.
The metals I prefer for the hard or brittle castings, before named, are
compounds of iron and carbon or steel; of iron, carbon, and manganese; of
iron and titanium; and those for the soft or ductile portions are decarbonized
iron or iron and carbon or steel.
My improvements in apparatus consist in casting any of the ordinary
apparatus connected with safes or, strong rooms of soft ductile metal.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Samuel Chatwood in the Great Seal Patent Office on the
1st March 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAMUEL
CHATWOOD, of Bolton, in the County of Lancaster, Safe Engineer, send
greeting.
.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of September, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Samuel Chatwood, Her special licence that I, the said Samuel
Chatwood, my executors, administrators, and assigns, or such others as I,
the said Samuel Chatwood, my 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 "IMPROVE-
MENTS IN THE MANUFACTURE OF METALLIC SAFES AND STRONG ROOMS, AND IN
APPARATUS CONNECTED THEREWITH," upon the condition (amongst others) that
I, the said Samuel Chatwood, my executors or administrators, by an instru-

page_text: ment in writing under my, or their, or one of their hands and seals, 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 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 Samuel Chatwood, 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 (that is. to say):-
My Invention has for its. chief object the manufacture of safes, strong
rooms, and doors, of any arrangement of hard or brittle metal and soft or
ductile metal, both cast of the desired form or shape, and one cast on the
other.
I run into moulds of the required form for safes or parts of safes for strong
rooms, or parts of strong. rooms, and for doors or parts of doors any hard or
brittle metal, and produce castings having projections or indentations or holes
or perforations of any form or shape on or in those parts intended to be coated
over with, or cast on or surrounded with soft or ductile metal which is cast on
the hard or brittle metal in a molten state and in suitable moulds for the
purpose.
The arrangement of the metals may be hard or brittle inside the safe,
room, or door, and soft or ductile outside, or the reverse, also soft or ductile
metal between hard or brittle metal, or hard or brittle metal between soft or
ductile metal.
To prevent detremental strain by the contraction of the metal cast on the
other metal, I take the first casting as soon as the metal is set and while it is
still-in-a-hot-state, and place it in a mould prepared for it, and run the other
metal in a molten state upon it, so that when they cool together the tensile
property of the last named metal will not be much decreased in any of its
parts or fractured by contraction.
The metals I prefer for the hard or brittle castings, before-named, are
compounds of iron and carbon or steel; of iron, carbon, and manganese; of
iron and titanium; and those for the soft or ductile portions are decarbonized
iron, or iron and carbon or steel.
My improvements in apparatus consists in casting any of the ordinary
apparatus connected with safes or strong rooms of soft or ductile metal.
Having thus described the nature of my said Invention, and the manner in
which the same is to be performed, I wish it to be understood that I do not
limit myself to the precise details and arrangements herein set forth, as the

page_text: same may be varied without departing from the nature and object of my said
Invention.
What I claim as my Invention is the manufacture of safes, strong rooms,.
.doors, and apparatus connected therewith of the metal or metals herein stated,
and the arrangement of the metals and the combination of parts and processes
of manufacture, herein stated and described. ;
In witness whereof, I, the said Samuel Chatwood, have hereunto set
my hand and seal, this Twenty-seventh day of February, in the year of
our Lord One thousand eight hundred and sixty-six.
Witness,
THOMAS BALDWIN.
SAMUEL CHATWOOD. (LS.)