AN IMPROVED ALARUM APPARATUS OR THIEF DETECTOR.
Year: 1875

page_text: LETTERS PATENT to William Edward Gedge, of No. 11, Wellington
.
339
Street, Strand, in the County of Middlesex, Patent Agent, for the
Invention of "AN IMPROVED ALARUM APPARATUS OR THIEF DETECTOR.'
-A communication from abroad by Victor Pérard, of 64, Faubourg
St
Martin Paris France
Sealed the 2nd June 1876, and dated the 6th December 1875.
PROVISIONAL SPECIFICATION left by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition,
on the 6th December 1875.
I, WILLIAM EDWARD GEDGE, of No. 11, Wellington Street, Strand,
in the County of Middlesex, Patent Agent, do hereby declare the nature
of the said Invention for "AN IMPROVED ALARUM APPARATUS OR THIEF
DETECTOR,' a communication to me from abroad by Victor Pérard, of 64,
Faubourg St. Martin, Paris, France, to be as follows:-
> "
The means hitherto employed to prevent the opening of a door, a
drawer, a trunk, and smilar objects are generally of casy application as
fixtures, but cannot be instantly placed, removed, and carried about.
-

page_text: The apparatus the subject of this Invention possesses these advantages
and will be found particularly useful for securing the doors of rooms in
hotels against stealthy entrance. This apparatus will give to its
possessor absolute security that no entrance can be effected into his
chamber without his being warned and awakened.
The characteristic feature of this apparatus is a starting or disengaging
gear which sets in motion a striking work analogous to that of the
ordinary electro-magnetic ringing apparatus. The throwing out of gear
takes place each time that the door or other object to which the
apparatus is applied is pushed, continues as long as the pressure exists,
and stops when it ceases.
The arrangement of the apparatus gives the additional advantage that
it acts as a stay, opposing the opening of the door.
The accompanying Sheet of Drawing shows an apparatus embodying
this Invention; it is composed as follows:-A barrel or spring box A con-
taining a spiral spring is set between two plates B. One of these plates
has two points or pins intended to penetrate into the floor like cramp
irons. The barrel A gears with the toothed gearing 1, 2, 3; the last
pinion 3 turns with considerable rapidity and actuates a small excentric C
which carries a small rod or stud working in a longitudinal slot on the
rod D of a hammer or striker. This rod and consequently the hammer
is carried on a pivot or spindle at the upper part; when the excentric
rotates the hammer executes a series of rapid oscillations, their object
being to cause the bell E to vibrate.
The striking apparatus would work directly the spring was wound up
if it were not arrested by a stop; this stop is formed by the rod F which
opposes the oscillation of the pivot of the striker. The removal of this
obstacle in any manner immediately sets the striker at work. This
arrangement is utilised thus:-The rod F is fixed to a small sliding
plate G held in position by a spiral spring.
If the plate G is pushed the spring yields and the rod F lowers,
liberating the spindle of the hammer which then begins to oscillate
until the pressure is discontinued when the rod F again rises and stops
its movement. The plate G has at the top a point which enters the
wood work of the door.

page_text: The apparatus being buttressed against the door, if the door is pushed
the pressure causes the points to penetrate into the flooring, thus
opposing the opening, this same pressure freeing the hammer which
oscillating rapidly strikes the bell and gives the alarm.
The apparatus being buttressed against the door, if the door is pushed
the pressure causes the points to penetrate into the flooring, thus
opposing the opening, this same pressure freeing the hammer which
oscillating rapidly strikes the bell and gives the alarm.
This apparatus may with slight modifications be applied to drawers,
portmanteaus, cases, trunks, and wherever its application may be found
useful.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Edward Gedge in the Great Seal Patent
Office on the 6th June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD GEDGE, of No. 11, Wellington Street, Strand, in the County of
Middlesex, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixth day of December, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Edward Gedge, Her special
licence, that I, the said William Edward Gedge, my executors, admini-
strators, and assigns, or such others as I, the said William Edward
Gedge, 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 ALARUM APPARAtus or ⚫ THIEF DETECTOR,' a communication to
me from abroad by Victor Pérard, of 64, Faubourg St. Martin, Paris,
France," upon the condition (amongst others) that I, the said William
Edward Gedge, 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 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.
3 33

page_text: NOW KNOW YE, that I, the said William Edward Gedge, 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 :-
The means hitherto employed to prevent the opening of a door, a
drawer, a trunk, and similar objects are generally of easy application as
fixtures, but cannot be instantly placed, removed, and carried about.
The apparatus the subject of this Invention possesses these advantages
and will be found particularly useful for securing the doors of rooms in
hotels against stealthy entrance. This apparatus will give to its
possessor absolute security that no entrance can be effected into his
chamber without his being warned and awakened.
The characteristic feature of this apparatus is a starting disengaging
gear which sets in motion a striking work analogous to that of the
ordinary electro-magnetic ringing apparatus. The throwing out of gear
takes place each time that the door or other object to which the
apparatus is applied is pushed, continues as long as the pressure exists,
and stops when it ceases.
The arrangement of the apparatus gives the additional advantage that
it acts as a stay, opposing the opening of the door.
The accompanying Sheet of Drawing shows an apparatus embodying
this Invention; it is composed as follows (see Figures 1, 2, 3) :-
A barrel or spring box A containing a spiral spring is set between two
plates B. One of these plates has two points or pins intended to
penetrate into the floor like cramp irons. The barrel A gears with the :
toothed gearing 1, 2, 3; the last pinion 3 turns with considerable
rapidity and actuates a small eccentric C which carries a small rod or
stud working in a longitudinal slot in the rod D of a hammer or striker.
This rod and consequently the hammer is carried on a pivot or spindle
at the upper part; when the eccentric rotates the hammer executes a
series of rapid oscillations, their object being to cause the bell E to
vibrate.
The striking apparatus would work directly the spring was wound up
if it were not arrested by a stop; this stop is formed by the rod F which
opposes the oscillation of the pivot of the striker. The removal of this
obstacle in any manner immediately sets the striker at work. This

page_text: arrangement is utilized thus:-The rod F is fixed to a small sliding
plate G held in position by a spiral spring.
If the plate G is pushed the spring yields and the rod Flowers,
liberating the spindle of the hammer which then begins to oscillate until
the pressure is discontinued, when the rod F again rises and stops its
movement. The plate G has at the top a point which enters the wood
work of the door.
The apparatus being buttressed against the door, if the door is pushed
the pressure causes the points to penetrate into the flooring, thus
opposing the opening; this same pressure freeing the hammer which
oscillating rapidly strikes the bell and gives the alarm.
This apparatus may with slight modifycations be applied to drawers,
portmanteaus, cases, trunks, and wherever its application may be found.
useful.
The ordinary alarms applied to doors generally strike but once, and
may not be heard, in which case the call which has sounded is of no
avail.
The apparatus shown, Figures 4, 5, and 6 of the accompanying Sheet
of Drawing, produces a continuous call or alarm so long as the door is
not entirely closed. This arrangement will be found particularly
advantageous when the person applying it is compelled to quit for a
few moments the apartment where it is applied, the alarm sounding
directly the door is opened again, and continuing to sound so long as the
door remains open, indicates to the person on returning that there is
somebody within the room, which announcement could not be given by
an ordinary alarm striking but once. This apparatus fixes into the door
as at Figure 6.
The rod D which gives a come-and-go motion by means of the
cccentric C is arrested in its movement by the pressure of the spring M
which it carries, and which rests against the door casing when the door
is closed. When the door is opened the pressure being removed the rod
is free and continues to work until the door is again closed.
Having now described and ascertained the nature of the Invention
communicated to me as aforesaid, and in what manner the same is or
may be performed, I claim as secured to me by the herein-before in part
recited Letters Patent, the use of an alarm apparatus with cscapement

page_text: obtained by pressure upon a door, drawer, or other object upon and
against which it may be fixed or applied, substantially as herein-before
described and shown on the accompanying Sheet of Drawing.
In witness whereof, I, the said William Edward Gedge, have
hereunto set my hand and seal, this Sixth day of June, in
the year of our Lord One thousand eight hundred and seventy-
six.