Year: 1898

page_text: I, LOUIS SNOECK, of 123, Rue Joseph II., Brussels, Belgium, Officer, do hereby
leclare the nature of this invention to be as follows:-
The present invention relates to a safety and warning apparatus instantane- .
ously applicable to all doors and distinguished by a bell which rings with the least
attempt at fracture.
The apparatus is composed of a metallic box, preferably of aluminium, com-
prising an ordinary clock-work bell. This box is fixed to the stem of the door-
handle as follows: the box carries at its lower part a cross-piece provided with a
circular arched incision; another cross-piece connected with the first by two pack-
ing-screws and also provided with an analogous incision may approach the first
by tightening the screws, securing the box on the stem of the door-handle which
is thus packed between the two crosspieces.
This securing arrangement of the apparatus may vary indefinitely.
In any case, the lifting lever of the bell projects on the outside of the box and
is terminated by a hook to which the end of a chain is fixed, the said chain pass-
ing through the bow of the key, introduced into the lock, below the door handle,
so that the bow is placed vertically; this chain terminates by a small steel-plate
which can enter more or less far into a screw-mortice made in a slide-loop, fixed
to the end of a small chain, connected with the box of the bell: the object of
a certain tension to the chain.
this arrangement is to give
The key being turned or pushed from the outside, the chain undergoes an over-
tension and, drawing the lever of the bell, disengages the said bell and causes
it to ring.
Another arrangement consists in suspending the bell-box to the stem of the
door-handle through the intermediary of two plates secured to a crosspiece, the
said crosspiece being conected with the crosspiece of the box in the same way as
with the first arrangement; but the stem of the handle being here substituted,
between the two crosspieces, by an axle placed for the purpose; the stem of the
door-handle, fixed higher above, supports the bell by means of a key placed in
holes, made in the two suspension plates, these plates having holes placed at
intervals to raise or lower the bell according to the position of the key-hole with
respect to the door-handle; to the plates a pulley is fixed, over which a chain
extends, one of the ends of which operating the bell-lever, the said chain coming
into contact with the box of the key, fitted into the lock, in such a way that
5 the bow is horizontal: the least movement of the key will produce an increase of
tension of the chain, disengaging the clock-work by drawing the lever.
A further arrangement consists in the fact that the box intended to contain the
apparatus has the form of a wedge on one of its small faces: the bell-supporter
is secured to this box by two metallic plates which are subjected in the botton
11. hav or in the ground.
P

page_text: A lever is pivotally fixed on an axle secured to a crosspiece connecting the two
abovementioned plates, the said lever carrying, at the ends of its larger branch, a
metal roller and a hook; another hook is secured to the end of the smaller
branch; to each of these hooks is attached a small chain extending to the bell-
lever; the roller or pulley of the larger lever-branch is in contact with the door;
this door opening the roller is pushed to the right, the chain stretches and dis-
engages the alarm.
Should the burglar notice the existence of the apparatus and push the door, the
chain will again stretch and the bell will ring.
Dated this 26th day of April 1898.
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.
8.
I, LOUIS SNOECK, of 123, Rue Joseph II., Brussels, Belgium, Officer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
The object of the present invention is to provide an alarm which can be instan-
taneously applied to a door or a series of doors or to windows or the like and
which is characterized by bells which ring very readily whenever motion is com-
municated either to the door handle or knob or the key of the lock or, as the case
may be, by raising the window sash.
The drawings annexed show, by way of example, a few practical arrangements
based upon the principle of the invention.
On the drawings:-
Figs. 1, 2 and 3 represent in elevation three different views of one arrange-
ment of the apparatus.
Fig. 4 is a plan of the cross-piece for fixing the apparatus to the handle of a
door.
Fig. 5 is a diagram showing two positions of the working chains for two
corresponding positions of the knob of the door.
Figs. 6, 7, and 8 show different arrangements for fixing the apparatus to the
knob of a door.
Figs. 9 and 10 represent in front and side elevation respectively a modified
arrangement of the apparatus. Whilst Fig. 11 shows in elevation another modi-
fied arrangement.
The apparatus consists of a metal box a, made by preference of aluminium,
on which is fitted a bell 6 having any ordinary and well known clockwork ringing
mechanism attached. The ringing mechanism is set in action by the pulling
downwards of the lever c which is provided with a hook 1 (see Figs 1, 2 and 3),
The lower part of the box has a semi-circular groove which rests on the spindle d
of the door handle on which the apparatus is to be fitted. The box is fitted to
said handled by means of a flat cross-piece having two notches f, f, therein (see
Fig. 4). Two pinching screws e, el pass through the notches in the cross piece g
and screw into lugs made on the bottom of the box a. By screwing up these
pinching screws the apparatus is tightly secured to the door handle and any
movement of the latter causes a corresponding movement of the box a. One end
of a chain, cord, or the like, h, h', is fastened to the hook 1 of the disengaging
lever c whilst the other end is fastened to the hook of a small stirrup shaped

page_text: ece of metal 2 loosely secured to the lower end of the adjusung
ain, cord or the like h, h¹ passes through the operating ring k of the key of the
ck which is placed in the position shown for locking or unlocking and as far
to the lock as possible. The tension given to the chain, cord or the like, h, h¹
an be adjusted and varied by means of the adjusting screw i.
When the key is in the lock and the keyhole thereof closed, in consequence of
he vertical position of the ring of the key, any effort whatever to make the
ey turn, or to push it out of the lock, will produce an increased tension on the
hain h, thereby causing the position of the lever c to be altered and the ring-
ng mechanism to be put in operation and in this way warn the inhabitants of the
house.
The same effect is produced if the position of the door handle is altered; in
fact, if, say the handle is turned and the line of the hooks 1, 2, comes into the
position 11, 21 as shown in the diagrammatic view Fig. 5, then as will be seen,
the lines 1, 3 and 3, 21 are greater than 1, 3 and 3, 2, therefore, the tension of the
chain is increased and the ringing mechanism is set in action.
The box a containing the ringing mechanism can be fixed on the handle of the
door in various ways.
Figs. 6, 7 and 8 show three different methods of fixing.
The
In the method shown at Fig. 6 a curved spring is used, the arms of which
can be brought, more or less, close to each other by means of a rack m.
teeth of the rack m engaging with the arm of the spring 1 fixes the box a on
the spindle of the door handle.
Fig. 7 shows an arrangement in which the box a is secured to the door handle
The lever o is pivotted at n tó
by means of the lever o and pinching screw p.
the box a and when the pinching screw, by means of its milled head, is screwed
upwards the box a is securely fixed to the door handle.
In the arrangement shown at Fig. 8 the box a is fixed on the handle by means
of a piece of flexible steel q having two teeth r, rl which catch on the teeth of
By pressing the box a down-
two racks s, s¹, fixed at each side of the box a.
wards the apparatus can be securely fixed to the door handle.
A modified arrangement of the apparatus is shown at Figs. 9 and 10 in which
the device for holding the alarm is made with two blades u, u provided at their
upper ends with holes into which can be fitted a key provided with a snug w.
With this arrangement the apparatus can be raised or lowered as desired. The
blades u,
u are connected, at their lower ends by means of a plate carrying an
axle t on which the box a of the ringing apparatus is fixed. The alarm holder
has also a pulley y which is supported by an elbowed piece z fixed to a cross bar.
The chain, cord, or the like, h, h¹, of the ringing apparatus passes over this pulley
The box a being fixed on the axle t and the cord, chain or the like h, stretched
When in this
over the pulley y, the apparatus is placed in such a manner that the two
blades u, u have the spindle d of the door handle between them.
position the height of the pulley y is such as to allow of the ring of the key
when the latter is placed in position in the lock, bearing lightly on the chain
45 cord, or the like h, h¹, so that any displacement of the key will induce an increase
or tension on the chain, cord, or the like h, h¹ and consequently cause the lever
to be moved, thus setting in motion the ringing mechanism.
0
In thi
Fig. 11 illustrates another method of carrying out the invention.
arrangement the box b¹, supports the apparatus. The alarm holder or box a
50 fixed to the box 61 by means of blades a¹, a¹, which pass through the box bon
of said blades being prolonged sufficiently far to go into the ground. A lever e
pivotted at 2, to a fixed cross piece c¹ has, at the extremity of its longer arm,
metal roller or cylinder d' and between the cross piece c¹ and the roller d',
hook gl and also at the extremity of its shorter arm, another hook gl. From the
55 hooks g, g¹ two chains, cords, or the like, 1, 2, and 2, 3, extend to the lever
When the door f¹ is opened the roller is moved to the right, and the chai
1

page_text: cord, or the like, 2, 3, stretched and the alarm set agoing. If the burglar
observes the box and draws the door to, the weight of the long arm of the lever e
forces the roller d¹ downwards thereby causing the alarm mechanism to be set in
motion by means of the chain, cord, or the like, 1, 2.
The arrangement shown at Fig. 11 can be readily applied to windows or the
like. When it is desired to do this, all that is necessary is to give more of a
bend to the lever and to lengthen its long arm; or, in place of doing this, a
metal shaft or lengthening bar may be added to the lever to enable the
roller d to rest against the window sash. When the sash is raised motion is
communicated to the chain, cord, or the like 2, 3, and the alarm thereby set
agoing.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I consider novel and desire to claim is:-
1. A burglar alarm characterized by a box containing an ordinary clockwork
alarm apparatus which is fitted to the door handle by means of an appropriate
device and specially by such devices as are shown at Figs. 2, 6, 7 and 8, and
which can be set in action by means of a hooked lever having a chain or equiva-
lent, whose tension is regulated, attached to it said chain passing through the
handle of the key inserted in the lock in such manner that, at the least dis-
placement of the key or turning of the door handle the chain will be pulled so as
to actuate the hooked lever and set the alarm mechanism in action, substantially
as hereinbefore described with reference to the drawings annexed.
2. A modification of the apparatus claimed in Claim 1, characterized by the
suspension of the box containing the alarm apparatus from the spindle of the
door knob by means of two blades and a key which can be passed through any
two of a series of holes made in the blades so as to permit of a vertical adjust-
ment of the apparatus in order that the tension of a chain or equivalent (h, h₁)
passed over a pulley can be regulated, said chain being caused, by the turning of
the door key, to disengage the hooked lever of the alarm apparatus, substantially
as hereinbefore described with reference to Figs 9 and 10 of the drawings anexed.
3. The modification of the apparatus claimed in Claim 1, having a lever with
arms of unequal length fulcrumed upon a support secured to two blades which
carry the alarm mechanism, said lever having, at the end of its long arm, a
roller which rests against the door and also two hooks from which chains, or equiva-
lent, extend to the disengaging lever of the alarm apparatus so that said appa-
ratus is set in action whenever the door is moved, substantially as hereinbefore
described with reference to Fig. 11 of the drawings annexed.
Dated this 26th day of January 1899.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.