IMPROVEMENTS IN LOCKS FOR SAFES, STRONG ROOMS, AND OTHER PURPOSES
Year: 1865

page_text: LETTERS PATENT to Samuel Chatwood, of Bolton, in the County of
Lancaster, Safe and Lock Engineer, for the Invention of "IMPROVEMENTS
IN LOCKS FOR SAFES, STRONG ROOMS, AND OTHER PURPOSES."
Sealed the 15th September 1865, and dated the 20th March 1865.
PROVISIONAL SPECIFICATION left by the said Samuel Chatwood at the
Office of the Commissioners of Patents, with his Petition, on the
20th March, 1865.
I, SAMUEL CHATWOOD, of Bolton, in the County of Lancaster, Safe and
Lock Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN LOCKS FOR SAFES, STRONG ROOMS, AND OTHER PURPOSES," to be
as follows:-
My Invention consists, first, in lining the keyhole passage of locks with
platinum.or platinum alloy, and in coating or forming such parts of the lock
as are accessible from the keyhole passage with platinum or platinum alloy;
Price 8d.]

page_text: and, second, in closing the keyhole passage by a screw or other plug, itself
secured by means of a self-contained lock or catch, that is a lock or catch
carried in the plug, or by means of a platinum lock or lock of platinum alloy.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Samuel Chatwood in the Great Seal Patent Office on the
20th September 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAMUEL
CHATWOOD, of Bolton, in the County of Lancaster, Safe and Lock Engineer,
send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of March, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-eighth 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 "Iж-
PROVEMENTS IN LOCKS FOR SAFES, STRONG ROOMS, AND OTHER PURPOSES," upon the
condition (amongst others) that I, the said Samuel Chatwood, my executors or
administrators, by an instrument 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 perforined, 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 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 thereof, reference being had to the Drawings hereunto annexed,
that is to say :-
My present Invention consists, first, in lining the keyhole of locks with
platinum or platinum alloy, and in coating or forming such parts of locks as
are accessible from the keyhole with platinum or platinum alloy; and, second,
in closing the keyhole passage of locks by a plug, which may be of any shape

page_text: found desirable, but which I prefer to be round, on which plug I chase a
thread or worm which fits into a corresponding thread or worm in the side of
the keyhole boss. Into this plug I fit a fastener, which may be a simple
catch, bolt, or spring of any kind; I prefer, however, as shewn in Figure 2,
to use a small lock, which I make of platinum or platinum alloy.
In order the better to illustrate my Invention I annex hereto explanatory
Drawings, Figure 1 being a section of one of my "intersected steel" safes
through A, A, of Figure 2; a, a, a, a, shows the outer ductile steel plates
with section of conical holes; b, b, b, b, shows the inner steel plates; c, c, c, c,
shows the hard "intersecting cast steel" with cones filling conical holes of
plates a, a, a, a; d, d, d, d, T-iron or steel frame of safe; e, e, e, e, frame of
lock case; ffff, sliding claw bolts; g, g,g, g, L-levers connecting sliding
claw bolts; h, rack; i, pinion for giving motion to the rack; j, j, j, j, bolts
for securing the sliding claw bolts f; 4, eccentric cam lock to throw the bolts
,,,;, the small lock throwing a small bolt into the periphery of the
eccentric cam lock, also a small bolt through the spindle; m, m, m, m, slots
through which the screws which fasten the lock case to the door pass.
Figure 2 is a section through A, A, Figure 1; a, a, a, outer ductile steel
plates with conical holes; b, b, b, inner steel plates; c, c, c, "intersecting
crystalline steel"; d, 1, T-frame with projecting dovetail rib d¹ for recep-
tion of sliding claw boltsf, f.; e, e, frame of lock case; i, pinion for actuating
the sliding claw bolts; j, bolts of eccentric cam locks; k,eccentric cam lock;
1,the small lock throwing bolt into the periphery of eccentric cam lock and
small bolt into the spindle of eccentric cam lock or (if no fixed spindle is
used) over the keyhole of the same; n,n, cups or spring boxes, into which
fit spiral springs o, o, under the head of the screws p, which fasten the lock
case to the door A 3; q, steel keyhole boss with keyhole plug lock r inserted
and secured by the self-contained bolt 11 which shoots into the slot r 2 of the
boss q. Figure 3 is a plan of boss q of Figure 2 and plug r, lock inserted.
Having now described the nature of my said Invention, and the manner of
carrying the same into effect, I wish it to be understood that I do not limit
myself to the precise details or arrangements herein described, as the same
may be varied without departing from the nature of my said Invention; but
I claim,―
First, the use and application of platinum and platinum alloy in the
manufacture of locks for the purpose of protection against acids and the
blow pipe.
Second, the use and application of screw plugs to protect the keyholes of
locks or fasteners of safes, strong rooms, or doors.

page_text: Third, the use and application of plugs having catches, springs, bolts, or
locks of any kind for the purpose of protecting the keyholes of locks or
fasteners of safes, strong rooms, or doors.
In witness whereof, I, the said Samuel Chatwood, have hereunto set
my hand and seal, this Twentieth day of September, in the year of our
Lord One thousand eight hundred and sixty-five.
SAMUEL CHATWOOD. (L.S.)