IMPROVEMENTS IN ALARM BELLS OR GONGS FOR DOORS AND OTHER PLACES, AND IN MEANS FOR ACTUATING THE SAME
Year: 1882

page_text: LETTERS PATENT to Arthur William Lovell Reddie of the Office for Patents
66 Chancery Lane in the County of Middlesex, Patent Agent, for an Invention
of "IMPROVEMENTS IN ALARM BELLS OR GONGS FOR DOORS AND OTHER
PLACES, AND IN MEANS FOR ACTUATING THE SAME" Communicated to
him from abroad by Edouard Julien Masseron of Paris in the Republic of
France
PROVISIONAL SPECIFICATION left by the said Arthur William Lovell
Reddie at the Office of the Commissioners of Patents on the 27th October
1882.
ARTHUR WILLIAM LOVELL REDDIE of the Office for Patents 66 Chancery
Lane in the County of Middlesex, Patent Agent "IMPROVEMENTS IN ALARM
BELLS OR GONGS FOR DOORS AND OTHER PLACES AND IN MEANS FOR ACTUATING
THE SAME." [Communicated to him from abroad by Edouard Julien Masseron
of Paris in the Republic of France]
The present invention relates to a novel construction of alarm bell or gong which
will produce a ringing sound similar to that of an electric bell, and to means for
directly actuating such bell or gong by the turning or movement of the bolt or
catch of the door to which it may be attached or with which it may be
connected.
To this end the alarm bell or gong consists of a metal cup or shell of the usual
construction against which a rotating hammer is caused to strike a rapid succession
of blows by means of suitable gearing arranged within the metal shell of the said
bell or gong. The rotating hammer is loosely pivotted in or connected with a block
of metal keyed on the shaft of a pinion, the said pinion being connected by a
suitable train of gearing with a crank arm to which a direct pull or thrust is given
by a link rod connected with the bolt of the lock.
↓
Thus, when the handle is turned and the bolt or catch of the lock is thereby
moved, the crank arm will be moved backwards or forwards, and the gear wheels
will be set in motion, causing the pinion on the shaft to which the hammer is loosely

page_text: mounted, to rotate rapidly, say some eight or ten times, and swinging round the
said hammer against the side of the gong or bell a corresponding number of tines
in rapid succession, whereby a ringing similar to that of the electric bell will
automatically result. The gong and its fittings may be adapted to any suitable
part of the door of a room, or other object and means for temporarily disconnecting
the door bolt from the aların gong mechanism inay be provided.
The alarm gong mechanism may also be fixed in any suitable place and be operated
by the rocking of a shaft on the opening or closing of the door.
In this case a lever arm is keyed on the rocking shaft, and a rod passing through
a box containing a spiral spring is caused to engage with the link rod of the bell
mechanism above referred to. Thus when the door is opened the shaft will be
rocked through any suitable arrangement of wires or levers, and in rocking will put
a pull on the rod passing through the spring box, thereby setting the bell in action
and at the same time compressing the spring. On the door being released, the
spring will force down, or back, the link rod, and again cause the bell to ring.
This utilization of the motion of the lock bolt for directly actuating the alarm
bell or gong allows of the gong mechanism being much simplified, and while not in
the least interfering with the ordinary play of the lock, no matter of what kind it
-may be, renders the opening of the door impossible without the owner or caretaker
of the fixture, furniture, or other object, being instantly warned thereof.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arthur William Lovell Reddie in the Great Seal Patent Office on the
26th April 1883:
"
ARTHUR WILLIAM LOVELL REDDIE of the Office for Patents 66 Chancery Lane in
the County of Middlesex Patent Agent IMPROVEMENTS IN ALARM BELLS OR
GONGS FOR DOORS AND OTHER PLACES AND IN MEANS FOR ACTUATING THE SAME
a communication to me from abroad by Edward Julien Masseron of Paris in the
Republic of Franco
The present Invention refers to the adaptation of warning gongs imitating an
electric bell, to the doors of apartments or of pieces of furniture, and to the direct
actuation of such gongs by the lock bolt of the said doors so as to make use of them
as automatic and constant warning apparatus
This adaptation and direct actuation of the gong, while not in the least interfering
with the ordinary play of the lock on whatever system it may be constructed,
render the opening of the door impossible without the proprietor of the fixture
furniture, or other object, being immediately warned thereof by the noise of the
gong or bell
This utilization of the motion of the lock bolt for the purpose in view allows of
the gong mechanism being much simplified, the proper sounding of the gong being
moreover ensured by a special arrangement of clapper or hammer for causing the
gong or bell proper to ring.
The nature of the improvements in alarm gongs which by the present Invention
are now introduced with a view to their special adaptation to doors and to their
being directly actuated by the lock bolt will be readily understood on reference to
the following description and the accompanying Drawing.
Fig 1 represents a warning gong applied to a door of any kind and actuated
directly by the moving of the bolt of the lock on the said door.
Fig 2 is a corresponding plan view seen from above
The gong T is struck with a succession of very rapidly repeated blows resembling
those of an electric bell, by a haminer m pivotted to a piece p keyed on the spindle o
of a pinion r, to which is imparted a quick rotary motion by the gear wheels 1 and
3 and the pinion 2.
The spindle of the wheel 3 carries a crank n which is connected by a link rod
b to the piece c fixed on the inner end of the bolt C of the lock S.
The rectilinear movement of the bolt is thus converted into a continuous rotary
movement in one direction or the other, which allows the hammer m to strike on tho
gong T when the bolt is drawn back to open the door, or when it resumes its
normal position
It will be easily perceived that by means of this combination of lock and gong
simultaneously operated it is impossible to open the door without sounding the
gong which as above indicated is worked both by the shooting or withdrawal of
the bolt or catch.
Figures 1 and 2 show that the gong T indicated by dotted lines may equally
well be placed at T', as shewn in full lines, the connection with the mechanism of
the said gong being effected by a bar a represented in dotted lines
The situation of the gong on the door is moreover entirely optional for it is
always possible by means of connections suitably arranged to establish the desired
relation between the door bolt, or lock and the warning gong.

page_text: It may also be useful to temporarily suspend the sounding of the gong in which
case a simple hook or any other coupling fitted at a suitable point may serve to
establish or break the connection between the locking device and the bell or gong.
Thus the gong T Fig: 1 may be isolated by allowing the link rod 6 to drop to
the position shewn at b' Fig: 1, after having disconnected it from the piece c.
Fig. 3 shows an arrangement which may be easily placed on any part of a door
of any sort.
The gong T and its mechanism are mounted on a metal plate D which may be
fixed in any suitable place: on this plate is mounted a tube or guide & enclosing a
spiral spring and having a rod passing through its centre, the said rod being
connected to a lever arm fitting on a spindle on which is mounted another lever or
short arm connected with a draw bar or pulling apparatus of any description
The rod is formed with a head which bears against a shoulder on the link b, or
engages with the said link in such a manner that on moving the lock bolt, a pull is
put upon the rod in the direction of the arrow, thereby actuating the gong and at
the same time compressing the spring r. The pull on the rod & ceasing, the spring t
pushes back the link rod b causing the gong to again sound; its rotating clapper or
hammer then acting in an opposite direction.
"
Having now described the nature of this Invention for "Improvements-in alarm
as communicated to me
bells or gongs for doors, and means for actuating the same
by my Foreign Correspondent, and having explained in what manner the same may.
be carried into practical effect, I claim
First The adaptation to doors and other places of a mechanical alarm bell or
gong in which a-rotating-clapper-is-caused to strike a rapid succession of blows and
produce a ringing sound similar to that of an electric bell, and the direct actuation
of the said bell or gong by the movement of the lock bolt, door bolt, door handle, or
equivalent locking device on the door or other place, substantially as described with
reference to the drawing.
Secondly The combination with the locking bolt or other locking device on a
_door_or_other_place, of a mechanical alarm bell or gong fitted with a rotating clapper
and producing sounds similar to those of an electric bell, and links or their
equivalent directly connecting the striking apparatus of the said bell or gong with
the said locking device, substantially as and for the purpose set forth.
Thirdly The combination with a bolt or similar locking device, of a lever arm s
adapted to be automatically rocked by the movement of the said locking device, a
mechanical gong such as T with a rotary clapper producing sounds similar to those
of an electric bell, crank axle n, link rod b, connecting or pull rod and spring",
substantially as and for the purpose described with reference to Fig: 3 of the
drawing.
In witness whereof I the said Arthur William Lovell Reddie have hereunto
set my hand and seal the twentysixth day of April in the year of our
hi hundred and sighty-three