AN IMPROVED ALARUM APPARATUS WHICH MAY BE EMPLOYED IN CONNECTION WITH LOCKS OR OTHER FASTENINGS
Year: 1863

page_text: LETTERS PATENT to Thomas Critchley Barraclough, of Manchester, in
the County of Lancaster, Engineer, for the Invention of "AN IMPROVED
ALARUM APPARATUS WHICH MAY BE EMPLOYED IN CONNECTION WITH LOCKS OR
OTHER FASTENINGS."-A communication from abroad by George Henry
Sanborn, of Boston, U. S. A.
Sealed the 14th July 1863, and dated the 15th January 1863.
PROVISIONAL SPECIFICATION left by the said Thomas Critchley Barra-
clough at the Office of the Commissioners of Patents, with his Petition,
on the 15th January 1863.
I, THOMAS CRITCHLEY BARRACLOUGH, of Manchester, in the County of
Lancaster, Engineer, do hereby declare the nature of the said Invention for
"AN IMPROVED ALARUM APPARATUS WHICH MAY BE EMPLOYED IN CONNECTION WITH
LOCKS OR OTHER FASTENINGS," (a communication to me from abroad by George
Henry Sanborn, of Boston, U. S. A.) to be as follows:-
The improvement consists, first, in a novel arrangement and construction
of mechanism designed to give alarum or signal by means of a bell which is
struck by a hammer connected by mechanism with the latch and handle when
opening or closing doors, drawers, "tills," or other such means of enclosure or
security.
A second part of the Invention consists in the application or combination
of the said alarum apparatus with locks or other similar fastenings. In
the Drawing attached, which is illustrative of the alarum combined with a
lock, a is the latch which is withdrawn either by key or handle b, and which

page_text: in moving the latch also draws back the sliding piece c and plate hinged
thereto, the projection on which, in passing, comes in contact with the
hammer tail piece d, and lifting the hammer, and causing it to fall and striko
the bell. When the bell is not required to ring it may be disconnected from
the latch by turning the "ward" or finger e, as shewn, and depressing the
hinged plate c so as to keep it out of contact with the tail piece of the
hammer, and thus the lock or latch may be used without giving alarm if
required. In adapting the Invention to drawers or "tills," a slight modification
will be necessary.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Critchley Barraclough in the Great Seal Patent
Office on the 15th July 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
CRITCHLEY BARRACLOUGH, of Manchester, in the County of Lancaster, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifteenth day of January, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-sixth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Thomas Critchley Barraclough, Her special license that I, the said Thomas
Critchley Barraclough, my executors, administrators, and assigns, or such others
as I, the said Thomas Critchley Barraclough, 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 "AN IMPROVED ALARM APPARATUS WHICH MAY BE EMPLOYED IN
CONNECTION WITH LOCKS OR OTHER FASTENINGS," which has been communicated
to me from abroad by George Henry Sanborn, of Boston, in the United
States of America, upon the condition (amongst others) that I, the said
Thomas Critchley Barraclough, my executors or administrators, by an instru
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 immediately after the date of the said Letters Patent.

page_text: NOW KNOW YE, that I, the said Thomas Critchley Barraclough, do
hereby declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement and accompanying Drawings (that is to say) :-
The improvement consists, first, in a novel arrangement and construction
of mechanism designed to give alarm or-signal by means of a bell, which is
struck by a hammer connected by mechanism with the latch and handle
when opening or closing doors, (drawers, tills,) or other such means of
enclosure or security in conjunction with a disengaging gear.
A second part of the Invention consists in the application or combination of
the said alarum apparatus with locks or other similar fastenings, and in an
arrangement of apparatus whereby the said alarum may be disconnected from
the lock when its use is not required.
In order that the Invention may be better understood and explained in
detail, I have hereunto attached a Sheet of Drawings made about the
full size.
'
Fig. 1 is a plan view representing an alarm apparatus combined with a
door, lock, or fastening, and acting in connection with the lock, the dotted
lines shewing the position of the parts when disconnected from the lock and
no alarm effected, the covering. plate being removed to exhibit the internal
construction; Fig. 2 is an end view representing the alarm apparatus as it
may be applied to a drawer or "till," shewn in section.
In Fig. 1, a is the latch or door fastening, which may be withdrawn by
means of the handle lever b, or by means of a key, whereby the spring a' is
compressed, and the latch or bolt released. By this action the sliding piece c
and plate c' hinged thereto are also drawn back; the projection on the hinged
plate c¹ being pressed by the spring d is thus brought into contact with the
hammer tail piece e, thereby lifting the hammer, which, on its descent, is caused
to strike the bell by means of the spring g.
When the bell is not required to
ring, it may be disconnected from the latch by turning the ward or finger h
upwards, thereby raising the hinged plate c¹, as shewn in dotted lines, so as to
keep it out of contact with the hammer tail piece, and thus the lock may be
used without giving alarm, if required.
In adapting the Invention to drawers or "tills," when no key is used, the
end of the latch is formed, as shewn in Fig. 2, so that in opening the drawer
it will become depressed by the fixed projection i on the drawer framing, and
thus give alarm, or it may be applied, as in Fig. 1, to act with a key or
handle.
Having now described the nature of the said Invention, together with the

page_text: method of carrying the same into practical effect, I wish it to be distinctly
understood that I claim the novel construction and arrangement of mechanism
for effecting a self-acting alarum which may be disengaged and made not to
ring in connection with locks or fastenings for doors, drawers, "tills," or
other means of enclosure or security, and the adaptation of an arrangement of
mechanism for disconnecting the alarum from the lock or fastening when
required, as herein-before described, set forth, and fully illustrated in the
Drawings attached.
In witness whereof, I, the said Thomas Critchley Barraclough, have
hereunto set my hand and seal, this Thirteenth day of July, in the
year of our Lord One thousand eight hundred and sixty-three.
THOMAS CRITCHLEY BARRACLOUGH. (L.S.)