IMPROVEMENTS IN THE CONSTRUCTION OF BURGLAR PROOF SAFES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I WILLIAM BEARDMORE of the firm of I & W Beardmore, of Parkhead Forge,
Glasgow, in the County of Lanark, North Britain, Iron and Steel Manufacturer do
hereby declare the nature of the said invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF BURGLAR PROOF SAFES" to be as follows:-
Tuis Invention relates to an improvement in the construction of Burglar proof
Safes whereby the cost of construction of such safes is reduced and the construction
itself simplified.-The Invention has for its object to avoid the existing practice of
constructing the outside casing of such safes of tough malleable Iron or Mild Steel,
and rendering them proof against drills, chisels and other cutting Instruments
used by burglars, in lining such safes with one or more layers of hard tool Steel.
The present Invention then consists in so manufacturing open-hearth steel that
it contains enough carbon and manganese to make it sufficiently hard to resist the
action of burglars tools, whilst being at the same time capable of being operated
upon by Machine tools whereby it is capable of being very slowly planed and
dressed into the requisite shapes and sizes and of being equally slowly drilled with
holes to receive rivets for holding the several parts of the structure together, that
is to say, a steel is produced of such sufficient hardness that whilst it is capable of
boing planed, drilled, and cut throughout a lengthened time in the course of
manufacturing a safe, yet involving by virtue of its hardness so, much time for a
burglar to operate upon that he could not succeed in breaking into a safe so
constructed. The improved Safes constructed of the improved open-hearth steel
are by virtue of the aforesaid properties of the said steel enabled to be constructed
of a single layer or thickness of such steel plates without the necessity of any
lining of hard or tool steel.-The Steel used for the purpose of this Invention has
the requisite hardness imparted to it by adding the requisite amount of spiegeleisen
or ferro-manganese to the metal before the ingots are cast.
J. H. JOHNSON, DAY & JOHNSON,
Petitioner's Agents,
115, St. Vincent Street, Glasgow.

page_text: COMPLETE SPECIFICATION,
I, WILLIAM BEARDMORE of the firm of I. & W. Beardmore, of Parkhead Forge,
Glasgow, in the County of Lanark, North Britain, Iron and Steel Manufacturer
do hereby declare the nature of my said invention for IMPROVEMENTS IN THE
CONSTRUCTION OF BURGLAR PROOF SAFES 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 an improvement in the construction of burglar proof
safes whereby the cost of construction of such safes is reduced and the construction
itself simplified. My Invention has for its object to avoid the existing practice of
constructing the outside casing of such safes of tough malleable iron or mild steel,
and rendering them proof against drills, chisels and other cutting Instruments used
by burglars, in lining such safes with one or more layers of hard tool steel.
The present Invention then consists in so manufacturing open hearth steel that
it contains enough carbon and manganese to make it sufficiently hard to resist the
action of burglars tools, whilst being at the same time capable of being operated
upon by Machine tools whereby it is capable of being very slowly planed and
dressed into the requisite shapes and sizes and of being equally slowly drilled with
holes to receive rivets for holding the several parts of the structure together, that
is to say, a steel is produced of such sufficient hardness that whilst it is capable of
being planed, drilled, and cut throughout a lengthened time in the course of
manufacturing a safe, yet involving by virtue of its hardness so much time for a
burglar to operate upon, that he could not succeed in breaking into a safe so con-
structed. The improved safes constructed of the improved open-hearth steel are by
virtue of the aforesaid properties of the said steel enabled to be constructed of a
single layer or thickness of such steel plates without the necessity of any lining of
hard or tool steel. The steel used for the purpose of my Invention has the
requisite hardness imparted to it by adding the requisito amount of spiegeleisen or
ferro-manganese to the metal before the ingots are cast.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
Constructing burglar proof safes of single layers of steel of the requisite hardness
as and for the purposes herein before described.