IMPROVEMENTS IN THE CONSTRUCTION OF SAFES, STRONG ROOMS, AND OTHER SIMILAR DEPOSITORIES, AND IN THE LOCKS. THEREOF
Year: 1865

page_text: PROVISIONAL SPECIFICATION left by Claude Parigot and Antoine
Grivel at the Office of the Commissioners of Patents, with their Petition,
on the 26th September 1865.
We, CLAUDE PARIGOT and ANTOINE GRIVEL the younger, both of Davies
Street, Berkeley Square, in the County of Middlesex, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF
SAFES, STRONG ROOMS, AND OTHER SIMILAR DEPOSITORIES, AND IN THE LOCKS.
THEREOF," to be as follows:-
This Invention has for its object, first, a better and more effectual method
of securing the doors of safes, strong rooms, and other similar depositories to
the surrounding sides, frames, or cases thereof than heretofore; secondly, to
prevent the doors being bored or perforated through by instruments; and,
thirdly, an improved method of constructing the locks of such said dépositories
so as to ensure the said locks against being picked or opened by other instru-
ments than the proper keys thereof.
The following are examples of the means by which we propose to effect the
above-mentioned objects:-First, as regards the mode of securing the doors
to the surrounding sides, frames, or cases of the safe or depository, the same
may be effected according to this Invention as follows; and we would here

page_text: remark that the description of lock we propose to employ in combination
with the mechanism which we shall presently describe is a lock without a
key, and for which Letters Patent, bearing date the 7th February, A.D. 1863,
numbered 347, were granted to us, the said Claude Parigot and Antoine
Grivel. We employ a lock of the above construction in combination with
the following mechanism, that is to say, according to the present Invention
we employ four or more bolts, each taking into one of the four sides of the
case or frame of the safe, strong room, or other depository. These bolts are
put in motion simultaneously by an excentric mounted on a rod, which
occupies the position that a key would upon the said rod; tubes of metal are
placed one over the other, and to the under part of each of such said tubes three
discs of metal are fixed, two of which are serrated on their edges in opposite
directions; the third of the aforesaid discs, which is situated between the two
other discs, is loose, and has a groove or slot, in which takes a projecting piece
fixed on each of the bolts each time the door of the depository is opened,
there being as many of such said projecting pieces as there are discs in the lock.
Upon the outer ends of the aforesaid tubes which carry the discs are placed
index hands pointing to a circular line of numerals, as described in the former
Specification of the Patent of the 7th February 1863 aforesaid. By the above
means the sides of the case or frame of the safe, strong room, or other
depository are securely connected to the door thereof in such a manner as to
prevent the sides being separated from the door by levers or wedges, the
bolts being so formed as to take or hook either into holes in the inside
of the case of the safe or into projecting pieces of metal jointed or otherwise
connected thereto. Or instead of the foregoing arrangement, projecting
pieces of metal may be fixed inside the door, and as the door closes the said
pieces be made to enter holes made in the inside of the safe crosswise of the
bolts.
Another method consists in fixing catches or studs in holes or to the sides
of the safe, so that as the bolts of the lock are shot out in the act of locking,
the said bolts coming into contact with the said catches or studs will securely
connect such said pieces to the several bolts of the lock, and thus prevent the
sides being separated from the door.
We now proceed to describe the means by which we propose to prevent
the perforation of the doors of safes, strong rooms, or other like depositories
as follows: We propose to adapt either between the inner and outer plates
of metal of which the door is formed, or on the outside thereof, a plate of
tempered steel cut similar to a file, the effect of which is to destroy the edge

page_text: of any tool which comes into contact therewith, and thereby to effectually
prevent perforation of the metal of which the door of the safe is composed,
and this applies to every portion of safes, whether constructed according to this
Invention or otherwise.