Method of and Apparatus for Electrical Signalling or Announcing in Connection with Telephone Circuits.
Year: 1888

page_text: Date of Application, 5th Apr., 1888
Complete Specification Left, 5th Jan., 1889
Complete Specification Accepted, 5th Apr., 1889
Method of and Apparatus for Electrical Signalling or Announcing
in Connection with Telephone Circuits.
I, PIERRE LEON KRICBOOM of Rue Royale, Brussels, Belgium, Electrician do
hereby declare the nature of this invention to be as follows:-
This invention relates to a new method of and apparatus for electrical signalling
or announcing whereby any person in possession of a private telephonic line con-
necting two buildings or establishments can be instantly informed of any attempt
at burglary or of any commencement of fire that may be taking place at either
building. It also enables a person whose dwelling is connected with a central
telephonic station to avail himself of an automatically operating apparatus for
informing such central station of any attempt at burglary or commencement of a
fire that may take place at the dwelling.
The apparatus may be applied to single or double wire circuits.
On the accompanying drawings Fig. 1 shews the invention applied to a private
telephonic line. A is the telephonic apparatus of the dwelling house; B is the
indicating apparatus, C is the telephonic apparatus of the factory or warehouse to
be protected, a being the earth wire of the telephone, the other wire b is connected
to a commutator c in connection with the line d and having a second contact which
establishes the communication with a wire leading to the indicating apparatus B.
This apparatus includes an ordinary signal bell D, a commutator E, an automatic
spring contact F and batteries G. At the factory, a commutator c¹ connects the line
either to the telephonic apparatus C, or to the apparatus H for indicating attempts
at burglary, or to the apparatus I for indicating fire, and also to the permanent
batteries J.
Under these conditions, if the commutators c c¹ are so arranged as to connect the
line on the one hand with the indicating apparatus B, and on the other hand with the
announcing apparatus H and I, the current coming from the batteries J passing
through the coils of the automatic contact F will sufficiently excite the electro inagnet
to cause the armature to be kept in contact therewith, and the current will then pass
thence to earth T through a

page_text: If now the wire of the announcing apparatus is interrupted either at H or at I, the
current from the batteries J is interrupted and the armature of F being no longer
attracted, the contact ceases and the current passing from the batteries G in passing
through the signalling bell will cause this to be sounded until it is stopped by
means of the interrupter E. It will be seen from this arrangement that when the
wire is interrupted, the signal bell can only be stopped at the dwelling house where
the signal is received.
Fig. 2 shows the arrangement of the apparatus for a dwelling house connected with a
central station. 1, is the telephonic apparatus of the house to be protected; 2, is a com-
mutator; 3 is an announcer for indicating the opening of a door, 4 is an announcer of
a fire; 5 are permanent batteries; 6 is a commutator at the central station; 7 is the
ordinary indicator board at that station; 8 is an indicator board with continuous current
according to this invention; 9 is a signalling bell; 10 are Leclanche batteries ;
11 shews the interior of the indicator board 8, and 12 is the telephonic apparatus of
the central station. If now the subscriber leaves his house and desires to place it
under the protection of the central station, he places his commutator 2 as shewn on
the drawing, and the central station places the commutator 6 also as shewn. Under
these conditions the permanent current coming from 5 passes through the announcers 4
and 3, the commutator 2, the line wire 13, the commutator 6 the board 8 where it
maintains the contact as above described between the two wires 14, 15, it then returns
to the batteries 5, passing through 6, 16, 2 and 17.
If however the wire be interrupted either at 3 or at 4, the circuit of the batteries 5
being broken the electro magnet of the board 8 ceases to be excited and consequently
the contact between 14 and 15 ceases, and the current from the batteries 10 being
established the signal bell 9 is sounded thereby while at the same time the electro
magnet 11 of the indicating board 8 is made to release a flap shewing the number
corresponding to the house from which the signal proceeds.
This arrangement is adapted for a double wire system.
If the telephonic circuit has only a single wire, the arrangenent shewn at Fig. 3 is
used. This arrangement is identical with the preceding one with the sole difference
that the circuits are completed through earth T as will be readily understood from
the drawing. As shewn in the arrangements of the apparatus 8 and 11 Fig. 3 the
indicating board contains for each subscriber one or two electro magnets which,
being excited by a constant current, attract the metal bar y, constituting the armature,
the tail y of which is acted upon by a spring a which is weaker than the attraction
of z. The bar y has a hook which retains the indicating flap u which is weighted
so as to tend to fall. Thus if the current that excites is interrupted the bar y, not
being attracted, is raised by the spring x, in turning on its pivot, and releases the
flap which falls and thus indicates the number of the subscriber, which it carries
on its inner side.
Dated thi
A
"1 1000
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Method of and Apparatus for Electrical Signalling or Announcing
in Connection with Telephone Circuits.
1, PIERRE LEON KRICBOOм of Rue Royale, Brussels, Belgium, Electrician, do
hereby declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
This invention relates to an improved mode of and apparatus for electrically
signalling or announcing in connection with telephone circuits whereby any number
of inhabitants connected to a telephonic system or any owner of a telephonic line can
be notified at once in one or other of his dwellings of any occurrence such as
burglary, fire &c. that has taken place at another locality.
It also enables a person whose dwelling is connected with a central telephonic
station to avail himself of an automatically operating apparatus for informing such
central station of any attempt at burglary or commencement of a fire that may take
place at the dwelling.
The apparatus may be applied to single or double wire circuits.
On the drawing accompanying my Provisional Specification, Fig. 1 shews the
invention applied to a private telephonic line. A is the telephonic apparatus of
the dwelling house; B is the indicating apparatus, C is the telephonic apparatus
of the factory or warehouse to be protected, a being the earth wire of the telephone; the
other wire is connected to a commutator c in connection with the line d and having
a second contact which establishes the communication with a wire leading to the
indicating apparatus B.
.
This apparatus includes an ordinary signal bell D, a commutator E, an automatic
spring contact F and batteries G. At the factory, a commutator c³ connects the line
either to the telephonic apparatus C, or to the apparatus H for indicating attempts
at burglary, or to the apparatus I for indicating fire, and also to the permanent
batteries J.
Under these conditions, if the commutators c c¹ are so arranged as to connect the
line on the one hand with the indicating apparatus B and on the other hand with the
announcing apparatus H and I, the current coming from the batteries J passing
through the coils of the automatic contact F will sufficiently excite the electro
magnet to cause the armature to be kept in contact therewith, and the current will
then pass thence to earth T through a.
If now the wire of the announcing apparatus is interrupted either at H or at I,
the current from the batteries J is interrupted and the armature of F being no longer
attracted, the contact ceases and the current passing from the batteries G in passing
through the signalling bell will cause this to be sounded until it is stopped by means
of the interrupter E. It will be seen from this arrangement that when the wire is
interrupted, the signal bell can only be stopped at the dwelling house where the signal
is received.

page_text: Fig. 2 shews the arrangement of the apparatus for a dwelling house connected
with a central station. 1, is the telephonic apparatus of the house to be protected;
2 is a commutator; 3 is an announcer for indicating the opening of a door; 4 is an
announcer of a fire; 5 are permanent batteries 6 is a commutator at the central
station; 7 is the ordinary indicator board at that station; 8 is an indicator board
with continuous current according to this invention; 9 is a signalling bell; 10 are
Leclanche batteries; 11 shews the interior of the indicator board 8, and 12 is the
telephonic apparatus of the central station.
If now the subscriber leaves his house and desires to place it under the protection
of the central station, he places his commutator 2 as shewn on the drawing accom-
panying my said Provisional Specification, and the central station places the
commutator 6 also as shewn. Under these conditions the permanent current coming
from passes through the announcers 4 and 3, the commutator 2, the line wire 13,
the commutator 6, wire 14, and the board 8, where it passes through the coil of the
electro magnet 11 and thus causes this to attract the armature 11", which holds a
flap 18 in the raised position.
From the electro magnet coil the current passes back to the batteries 5 again
through wire 15, commutator 6, wires 16, commutator 2 and wire 17.
If however the circuit of the batteries 5 be broken, either at 3 or at 4, the electro
magnet 11 will cease to be excited and the armature 11" being pulled away from
them by a spring 11b, will release the flap 18, and this in falling will firstly disclose
the number corresponding to the house from which the signal proceeds, and will also
make a contact so as to close the circuit of the batteries 10, the current from which
will actuate the signal bell 9.
This arrangement is adapted for a double wire system.
If the telephonic circuit has only a single wire, the arrangement shewn at Fig. 3
is used. This arrangement is identical with the preceding one with the sole
difference that the circuits are completed through earth T as will be readily under-
stood from the drawing. As shown in the arrangements of the apparatus 8 and 11
Fig. 3 the indicating board contains for each subscriber one or two electro magnets z
which, being excited by a constant current attract the metal bar y constituting the
armature, the tail y¹ of which is acted upon by a spring a which is weaker than the
attraction of 2.
The bar y has a hook which retains the indicating flap u which is weighted so as
to tend to fall. Thus if the current that excite z is interrupted, the bar y not being
attracted is raised by the spring x, in turning on its pivot, and releases the flap u
which falls, and thus indicates the number of the subscriber, which it carries on its
inner side.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is: --
1. The method whereby an ordinary telephonic circuit is utilized for transmitting
to any locality on the circuit, electrical signals automatically produced by means of
signalling apparatus situated at another locality on the circuit, such signals being
given by the interruption of an electric current, substantially as herein described.
2. The use for signalling upon telephone lines in the manner set forth in the
preceding claim, of electrical signalling apparatus arranged and operating substan-
tially as herein described with reference to the drawings.
Dated this 5th day of January 1889
ABEL & IMRAY,
Agents for the Applicant.