CERTAIN IMPROVEMENTS IN LOCKS APPLICABLE FOR ALL GENERAL PURPOSES, BUT PARTICULARLY ADAPTABLE FROM ADDITIONAL SECURITY TO IRON SAFES, STRONG ROOMS, OR PLACES CONSTRUCTED FOR THE STORING OF VALUABLE PROPERTY."
Year: 1873

page_text: LETTERS PATENT to Charles Barton, of West Bromwich, in the County
of Stafford, for the Invention of "CERTAIN IMPROVEMENTS IN LOCKS
APPLICABLE FOR ALL GENERAL PURPOSES, BUT PARTICULARLY ADAPTABLE FROM
ADDITIONAL SECURITY TO IRON SAFES, STRONG ROOMS, OR PLACES CONSTRUCTED
FOR THE STORING OF VALUABLE PROPERTY."
PROVISIONAL SPECIFICATION left by the said Charles Barton at the
Office of the Commissioners of Patents, with his Petition, on the
17th December 1873.
•
I, CHARLES BARTON, of West Bromwich, in the County of Stafford,
do hereby declare the nature of my said Invention for "CERTAIN IMPROVE-
MENTS IN LOCKS APPLICABLE FOR ALL GENERAL PURPOSES, BUT PARTICULARLY
ADAPTABLE FROM ADDITIONAL SECURITY TO IRON SAFES, STRONG ROOMS, OR PLACES
CONSTRUCTED FOR THE STORING OF VALUABLE PROPERTY," to be as follows (that
is to say):-
I purpose constructing the general interior mechanism of locks of
such metal or metals best calculated to resist the action of acids. This

page_text: may be effected by making the tumblers or other interior parts of a
compound of iron, copper, tin, and antimony, which when melted,
mixed, and wrought, will resist the action of acids.
In some cases the said parts may be coated exterially with lead and
platinum, or lead and tin, singly or combined, as these metals have the
quality of resisting the action of deleterious acids.
And, secondly. My improvements relate to the introduction of an
auxiliary bolt, the primary or body part of which may extend beyond
the rim of the lock so fashioned and applied that a reduced part may lay
within the lock rim while the larger part extends beyond, whereby any
undue tampering with the lock by pickers or false keys, the interior or
reduced part of the said auxiliary bolt will become separated from the
body or enlarged part before mentioned of the said bolt so as to permit
it to drop into a prescribed recess, thereby locking the bolt proper of the
lock in such a way that no process of the burglar will be able to remove
or get access to the said auxiliary bolt when once freed and dropped into
the recess for holding the bolt proper of the lock in its engaged or
extended position. This same result would also be effected if the
burglar used acids, by which the reduced and accessible part of the
auxiliary bolt projecting within the lock may be eaten away, allowing
the body of the said bolt in like manner to fall into the cavity before
described. This said auxiliary bolt is protected with a hardened steel or
other cover arranged with a spring or other equivalent means for forcing
the auxiliary bolt into the recess herein-before mentioned, and retaining
it in that position, by which means the engaging bolt of the lock will
maintain its hold, baffling the burglar even after the lock may be
destroyed by the burglar's tools or eaten away by acids injected into the
lock for the purpose of its destruction; and this general description with
suitable modifications may be embodied and applied to all locks where
great security is required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Barton in the Great Seal Patent Office
the 17th June 1874.
on.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
BARTON, of West Bromwich, in the County of Stafford, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of December, in the year of our
Lord One thousand eight hundred and seventy-three, in the thirty-sixth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Charles Barton, Her special licence that I, the
said Charles Barton, my executors, administrators, and assigns, or such
others as I, the said Charles Barton, 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 "CERTAIN IMPROVEMENTS IN LOCKS APPLICABLE FOR
ALL GENERAL PURPOSES, BUT PARTICULARLY ADAPTABLE FOR ADDITIONAL SECURITY
TO IRON SAFES, STRONG ROOMS, OR PLACES CONSTRUCTED FOR THE STORING Or
VALUABLE PROPERTY," upon the condition (amongst others) that I, the said
Charles Barton, by an instrument in writing under my hand and seal,
'should particularly describe and ascertain the nature of the said Inven-
tion, 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 immediately after the date of the said Letters
Patent.
:
NOW KNOW YE, that I, the said Charles Barton, 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) :—
I purpose constructing the general interior mechanism of master locks
manist the nation afarid
AL

page_text: In some cases the said parts may be coated on the exterior with lead
and platinum, or lead and tin, singly or combined, as these metals have
the quality of greatly resisting the action of deleterious acids.
But my improvements essentially relate to the introduction of an
auxiliary part or bolt to be worked in connection with the master lock
bolt by the action of the key, the primary or body part of which said
auxiliary bolt may extend beyond the rim of the small master lock, and
is so fashioned and applied that a reduced part may lie within the said
master lock rim while the larger part extends beyond, whereby any
undue tampering with the lock by pickers or false keys will cause the
interior or reduced part of the said auxiliary part or bolt to become
separated from the body or internal part before mentioned so as to
permit it or the part or parts in connection to drop into a prescribed
recess, thereby locking the main bolts of the locking system in such a
way that no process of the burglar can remove them or get access to the
said auxiliary parts or bolts when once freed and dropped into the recess
for holding the bolts proper of the locking system in its engaged or
extended position. This same result will also be effected if the burglar
used acids, by which the reduced and accessible portion of the auxiliary
part or bolt within the master lock may be eaten away, allowing the
body or outer part of the said bolt in like manner to fall into the cavity
before mentioned. This said auxiliary bolt is protected with a hardened
steel or other cover arranged with a spring or other equivalent means
for forcing the auxiliary bolt into the recess herein-before mentioned,
and retaining it in that position, by which means the engaging bolts of
the main locking system will maintain its hold, baffling the burglar even
after the master lock may be destroyed by the burglar's tools or eaten
away by acids injected into the lock for the purpose of its destruction;
and this general description with suitable modifications may be embodied
and applied to all locks where great security is required.
But in order more fully to explain my Invention, and the manner in
which the same may be carried into effect, I will refer to the Drawings
hereunto annexed, and to the letters and figures marked thereon.

page_text: A is the master lock as commonly used of various internal mechanism;
the bolt marked 6 locks into the strap C of the main bolts d, d, d; the
said strap C is further held by an auxiliary detent E which works
vertically between circular or other projections as atf,f. The top end of
the detent E is reduced to a round or square shank, the to pend of which
works through the cross piece g, the spiral spring / holding the detent E.
down in the position shown. The part J (partly shown in dotted lines)
passes down behind or in front of the strap C, and by a reduced part is
connected internally with the bolt 6 of the master lock; and as a con-
sequence when the bolt 6 of the master lock is drawn down by the
action of the key the part J will also be pulled down, thereby elevating
the detent E by means of the lever K working on the fulcrum 1, thus
leaving the strap C with its attendant bolts d, d, d, to be worked by a
knob and spindle, the latter passing through the front plate of the door
and follow M in the ordinary way, so that should there be any tampering
with the master lock through the keyhole either by pickers or the
injection of strong acids though the master lock be destroyed, the
spring of the detent E will hold this auxiliary fastening in position,
and by this means the bolts d, d, d, maintain their locking force and
baffle all the efforts of the burglar.
Fig. 4 is simply an end view of Fig. 1, and as in the former case the
front plate and hinge joint are not shown."
Fig. 2 is simply a repeat of as much of Figure 1 necessary for the
purpose of showing that the object there obtained may be realized by
different means and yet possess the advantage of an auxiliary detent; as
for instance the detent N is held in position by working on the fulcrum p
by the contracting force of the spiral spring q, and yet brings the detent
under control of the key by the strap 7, being connected with the master
lock bolts, that when the bolt & is turned down the detent N will be
elevated, thereby allowing the larger bolts and strap T to be drawn back
by the action of the knob and follow.
In some cases where the burglar may depend mainly upon the use of
acids for destroying the master lock as a means of getting access to the
interior, I provide one or more lateral detents, that by means of a
reduced end so adapted that it may enter a small opening in the rim of
the master lock the same will be held in position until destroyed by acid,

page_text: when the external part will be pressed down so as to hold in check the
larger or outer engaging bolts in their extended position, and this I have
represented at Fig. 3, with a portion of the frame removed for con-
venience of space. U is the master lock; V, the strap in connection
with the outer bolts, and into a recess of which the bolt of the master
lock enters when securing the safe or strong room, as explained and
exhibited in Figs. 1 and 2. W is a projection connected with the
strap V and outer bolts, thin enough to pass under the part Y when in
its normal position. This part Y is attached by rivets or otherwise to
the pendulous strap Z which is permitted to work free betwen two
adjustable centres, and is held in check at the bottom end by the
spring m, the object and purpose of which is for laterally locking the
main bolts in position, thereby frustrating the object of the burglar
when acid is.used for destroying the internal mechanism of the master
lock as the action of the acids will eat away the reduced portion or
end of the part Y, thereby permitting it to drop inward and held by
force of the spring m, bringing the end of the part Y in contact and
abutting against the corresponding face of the part W, thereby locking
or holding the main bolts in their extended position and defeating the
burglar though the bolt marked n of the master lock drop free of the
strap V from the destruction of the internal parts, and although I have
limited this lateral principle for its adaptation to one set of extended
bolts, yet the other side or bottom of the master lock frame may in like
manner be arranged for any additional outer bolts that it may be
desirable to use according to the size or extent of the safe or strong room
door, or other locking purposes to which my improvements are
applicable.
Having thus given a general description of my Invention, and the
manner in which the same may be carried into effect, I wish it under-
stood that I do not purpose confining myself to any particular mode or
mechanical arrangement for constructing or liberating the auxiliary
locking detent, as exhibited at E, N, and Y, Figures 1, 2, and 3, as the
same may be variously constructed and applied without departing from
the spirit of my Invention, which is to so combine an auxiliary detent or
detents with the construction and action of master locks that the very
not of tomnoring either by nickers or acids max frustrate the shinct

page_text: detents into operation, and which Invention I claim as new, and wish to`
protect under these my impart recited Letters Patent.
In witness whereof, I, the said Charles Barton, have hereunto
hand and seal, this Thirteenth day of June One thousand
set
my
eight hundred and seventy-four.
Witness,
JOHN EDWIN HYATT,
Clerk to Mr. J. S. Cockings,
Patent Agent,
16, Ann Street,
Birmingham.
CHARLES BARTON. (L.S.)