A New or Improved Apparatus for Indicating the Time and Number of Telephonic Communications.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
A New or Improved Apparatus for Indicating the Time and Number
of Telephonic Communications.
We, ERICH KOSANKE, CARL FUHR and BRUNO KRAUSSE, Watchmakers all
of Wilmersdorf near Berlin in the Empire of Germany, do hereby declare the
nature of this invention to be as follows:-
The present invention has for its object to provide an apparatus for indicating
the time and number of telephonic communications, which apparatus may be set
in operation or disconnected by the participants themselves, thereby dispensing
with the control or assistance on the part of the operating officials.
The apparatus is represented in the annexed drawings, in which Fig. 1 is a rear
view; Fig. 2 a top view; Fig. 3 a section on line A-B of Fig. 1 as seen from
the right; Fig. 4 a section on line A-B of Fig. 1 as seen from the left; Fig. 5 a
front view; Fig. 6 is a diagram showing the manner of arranging the inserting
device, with telephone.
The apparatus consists of a clockwork 1 and a numbering arrangement 2, both 1
and 2 being, as hereinafter described, actuated by the electrical part of the apparatus
connected with the conductors of the telephone. On the shaft 3 of the spring 4
of the clockwork 1 is mounted a one armed lever 5 (Fig. 1) the limit of the move-
ments of which is determined partly by the contact spring 7 secured to the
contact 6, and partly by the springs 10 and 11 attached to the contacts 8 and 9
respectively. The one extremity of spring 7 lies against a contact piece 12, while
the extremities of springs 10 und 11 rest each on a separate contact piece 13 and 14
respectively.
may be
The balance or pendulum 15 of the clockwork 1 is so arranged that it
kept in a position shown in Fig. 1 by the arm 16 of the armature 17 of an electro-
magnet 18 arranged above spring 15. Said armature supports another arm 25
which engages with the wheel 29 by means of latch 27, said wheel being at
the same time prevented from moving backward. 19 is another electro-magnet
(Figs. 1 and 2) the armature 20 of which engages by means of the arm 21 with a
spring 22, while its arm 23 rests against a contact spring 24, the latter being,
according to its position, in or out of connection with the contact plate 25.
30 is a third electro-magnet (Figs. 1, 2 and 4) the armature 32 of which engages
with the contact spring 24 by means of an arm 33 (Fig. 2). 34 is a circuit closer
which, although surrounded by the conductors, is insensible to the circuit.
The manner in which the apparatus described operates, is hereinafter demon
strated with the aid of the diagram Fig. 6 by explaining the successive stages of
operation when a subscriber calls or is called. The contact springs 7, 10 and 11
are represented so as not to be in contact with their respective opposite contact
pieces.
In order to call the station or a subscriber, the lever 5 is turned in the direction
of the arrow, thus assuming the position shown in Fig. 1 on the right. The
conductor of the calling person attached to the contact pieces 6 and 12 will then
be interrupted, the spring 4 of the clockwork 1, keyed to the same shaft 3 by means
of lever will be stretched, and finally the ground connection of the calling

page_text: conductors passing through the electro-magnet 19 as indicated in dotted lines,
will be established by the spring 10 being pressed against the contact piece 13.
On the call generator 35 being set in action by the calling person, the electro-
magnet 19 actuated by the calling circuit will pull its armature 20 (Fig. 2) thus
disengaging the contact spring 24, that is connected with the ground conductor,
from the contact plate 25, to which latter is attached the conducting wire.
Consequently the direct ground connection of the conductor is interrupted and
the circuit running from the direction of the calling person compelled to pass the
circuit closer. The person called on taking off his receiver 36 from the hook 37,
will, through the contact arm 38 passing, on the hook 37 being raised by the
spring 39, the contact 40, cominunicate for a moment the strong current of his
local battery 41 to the conductor, said current acting upon the circuit closer 34 in
such manner that the circuit of the local battery of the calling person running
through the electro-magnet 18, is closed. The armature 17 of the electro-
magnet 18 is then pulled and kept in position by the spring 22, whereby the
balance or pendulum 15 hitherto stopped by the arm 16 of the armature 17 is
released, and further, the inserting latch 27 of the arm 26 turns the wheel.29 one
tooth's length, so that a communication is registered, while the clockwork 1 set in
operation by the disengagement of the pendulum indicates the hour of the dialogue
in minutes and seconds.
When a communication is finished, the calling person gives a sign to that effect
by turning the crank of the call generator 35 whereby in the manner described
the electro-magnet 19 is acted upon by the calling current, and its armature 20
draws backward the spring 22 by means of the arm 21 (Fig. 2) so that the
'armature 17 of the electro-magnet 18 again presses against the pendulum thereby
stopping the clock. The arm 26 of the armature 17 glides with the inserting
latch 27 over the next tooth of the wheel 29 to register the next conversation.
Having given the sign of conclusion the calling person moves the lever 5 back
in the position shown in Fig. 1 on the left, whereby the clockwork 1 is relaxed and
on the contact spring 7 being pressed against the contact piece 12 the circuit
restored for another call.
It is evident from the foregoing description that the subscriber can never be
called unless he moves the lever arm 5 backward, as otherwise his circuit would be
disconnected, and it is further evident that he himself cannot call another person
without having beforehand wound the clockwork.
As moreover the said clockwork and the registering device are set in action
upon the receiver being taken off the hook by the person called, a conversation
cannot take place in the absence of the latter and therefore never be registered.
On the other hand, the calling subscriber is always able to bring to an end any
conversation and arrest the clockwork of the apparatus by giving the sign of
conclusion by turning the lever 5 back to its former position.
For the person called the successive stages during the action of calling are the
following: In consequence of the preceding operation of the apparatus, the circuit
with the exception of the ground connection is interrupted, the lever 5 thus being
in position as shown in Fig. 1 on the left. When the act of calling is performed
the circuit runs through the electro-magnet 30 the armature 32 of which is
attracted and the contact between the spring 24 and the plate 25 restored by the
arm 33 of said armature, whereby the circuit with the ground is connected. As
the contact springs 10 and 11 do not rest on the contact pieces 13 and 14, the call
generator 35 and the circuit closer 34 as well as the two electro-magnets 18 and 19
are disconnected from the circuit, the result being that for the person called a
conversation cannot be registered. On the latter taking off the receiver 36 the
aim 38 of the hook 37 passes the contact 40 thereby closing for a moment the
circuit of the local battery 41 with the result that in the manner described a
strong current is passed to the apparatus of the calling person the circuit closer 34
of which is set in action.
Ou the conversation being finished the person called replaces his receiver

page_text: without however giving the sign of conclusion as his call generator 35 is
disconnected from the circuit.
Dated this 26th day of June 1895.
HERBERT HADDAN & Co.,
Agents for the Applicants.
A New or Improved Apparatus for Indicating the Time and Number
of Telephonic Communications.
We ERICH KOSANKE, CARL FUHR and BRUNO KRAUSSE, Watch Makers of
Wilmersdorf, near Berlin in the Empire of Germany, 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 :-
The present invention has for its object to provide an apparatus for indicating
the time and number of telephonic communications, which apparatus may be set
in operation or disconnected by the subscribers themselves thereby dispensing with
the control or assistance on the part of the operating officials.
The apparatus is represented in the drawings filed with our Provisional
Specification in which :-
Fig. 1 is a rear view; Fig. 2 a top view; Fig. 3 a section on line A-B' of
Fig. 1 as seen from the right, Fig. 4 a section on line A-B of Fig. 1 as seen from
the left Fig. 5 a front view; Fig. 6 is a diagram showing the manner of arranging
the inserting device, with telephone.
The apparatus consists of a clockwork mechanism 1 and a numbering arrange-
ment 2 both 1 and 2 being, as hereinafter described, actuated by the electrical
part of the apparatus connected with the conductors of the telephone. On the
shaft 3 of the spring 4 of the clockwork is mounted a one armed lever 5 (Fig. 1)
the limit of the movements of which is determined partly by the contact spring 7
secured to the contact 6 and partly by the springs 10 and 11 attached respectively
to the contacts 8 and 9: The one extremity of spring 7 lies against a contact
piece 12, while the extremities of springs 10 and 11 rest each on a separate contact
piece 13 and 14 respectively.
The balance or pendulum 15 of the clockwork 1 is so arranged, that it may be
kept in a position shown in Fig. 1 by the arm 16 of the armature 17 of an electro-
magnet 18 arranged above spring 15. Said armature supports an arm 25 which
engages with the wheel 29 by means of a latch 27, said wheel being at the same
time prevented from moving backward. 19 is another electro magnet (Figs. 1
and 2) the armature 20 of which engages by means of the arm 21 with a spring 22,
while its arm 23.rests against a contact spring 24, the latter being, according to
its position, in or out of connection with the contact plate 25. 30 is a third electro-
magnet (Figs. 1, 2 and 4) the armature 32 of which engages with the contact
spring 24 by means of an arm 33 (Fig. 2). 34 is a circuit closer which, although
surrounded by the conductors, is insensible to the circuit.
The manner in which the apparatus described operates is hereinafter demon-
strated with the aid of the diagram Fig. 6 by explaining the successive stages of
operation when a subscriber calls or is called. The contact springs 7, 10 and 11
are represented so as not to be in contact with their respective opposite contact-
pieces.
In order to call the station or a subscriber, the lever 5 is turned in the direction
of the arrow, thus assuming the position shown in Fig. 1 on the right. The
conductor of the calling person attached to the contact pieces 6 and 12 will then
be interrupted, the spring 4 of the clockwork 1, keyed to the same shaft 3 by

page_text: means of lever 5, will be stretched and finally the earth connection of the
calling conductors passing through the electromagnet 19, as indicated in dotted
lines, will be established by the spring 10 being pressed against the contact
piece 13.
On the call generator 35 being set in action by the calling person, the
electro-magnet 19 actuated by the inducting circuit, will pull its armature 20
(Fig. 2) thus disengaging the contact spring 24 that is connected with the earth
conductor from the contact plate 25, to which latter is attached the conducting
wire. Consequently the direct earth connection of the conductor is interrupted
and the circuit running from the direction of the calling person compelled to pass
the circuit closer. The person called on taking off his receiver 36 from the hook 37
will, through the contact arm 38 passing on the hook 37 being raised by the
spring 39 and the contact 40, communicate for a moment the strong current of his
local battery 41 to the conductor, said current acting upon the circuit closer 34 in
such manner that the circuit of the local battery of the calling person running
through the electro-magnet 18 is closed. The armature 17 of the electro magnet 18
is then pulled and kept in position by the spring 22 whereby the balance or
pendulum 15 hitherto stopped by the arm 16 of the armature 17 is released and
further, the inserting latch 27 of the arm 26 turns the wheel 29 one tooth's length,
so that a communication is registered, while the clockwork 1 set in operation by
the disengagement of the pendulum indicates the hour of the dialogue in minutes
and seconds.
When a communication is finished, the calling person gives a sign to that effect
by turning the crank of the call generator 35 whereby in the manner described,
the electro magnet 19 is acted upon by the calling current, and its armature 20 draws
backwards the spring 22 by means of the arm 21 (Fig. 2) so that the armature 17
of the electromagnet 18 again presses against the pendulum thereby stopping the
clock. The arm 26 of the armature 17 glides with the inserting latch 27 over the
next tooth of wheel 29 to register the next conversation.
Having given the sign of conclusion, the calling person moves the lever 5, back
in the position shown in Fig. 1 on the left, whereby the clockwork 1 is relaxed
and on the contact spring 7 being pressed against the contact piece 12, the circuit
restored for another call.
It is evident from the foregoing description that the subscriber can never be
called unless he moves the lever arm 5 backward, as otherwise his circuit would be
disconnected and it is further evident that he himself cannot call another person
without having beforehand wound up the clockwork.
As moreover the said clockwork and the registering device are set in action
upon the receiver being taken off the hook by the person called, a conversation
cannot take place in the absence of the latter and therefore never be registered.
On the other hand the calling subscriber is always able to bring to an end any
conversation and arrest the clockwork of the apparatus by giving the sign of
conclusion and by turning the lever 5 back to its former position.
For the person called the successive stages during the action of calling are the
following:-
In consequence of the preceding operation of the apparatus the circuit, with
the exception of the earth counection is interrupted, the lever 5 thus being in
position as shown in Fig. 1 on the left. When the act of calling is performed the
circuit runs through the electromagnet 30 the armature 32 of which is attracted,
and the contract between the spring 24 and the plate 25 restored by the arm 33 of
said armature, whereby the circuit with the earth is connected. As the contact
springs 10 and 11 do not rest on the contact pieces 13 and 14 the call generator 35
and the circuit closer 34 as well as the two electro magnets 18 and 19 are
disconnected from the circuit, the result being that for the person called a con-
versation cannot be registered. On the latter taking off the receiver 36 the
arm 38 of the hook 37 passes the contact 40 thereby closing for a moment the
circuit of the local battery 41 with the result that in the manner described a

page_text: strong current is passed to the apparatus of the calling person the circuit closer 34-
of which is set in action.
On the conversation being finished the person called replaces his receiver without.
however giving the sign of conclusion as his call generator 35 is disconnected from.
the circuit.
•
Having now particularly described and ascertained the nature of this inven-.
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. An apparatus for giving the duration, time and number of telephonic con-
versations comprising the clockwork 1 and registering device 2 capable of being
set in function by a person called actuating the electro magnet or solenoid 18.
inserted in the circuit, said clockwork 1, when the conversation is finished, being
capable of being stopped by the calling person on actuating the electromagnet or
solenoid inserted in the circuit.
2. In an apparatus as described the lever 5 or other equivalent means serving-
to close or interrupt the call and conversation circuit and also to interrupt and.
close the alarm circuit whereby the clockwork 1 is respectively wound or
relaxed.
.
3. With an apparatus as described the arrangement of the electro magnet or
solenoid 30 in the alarm circuit of the calling person whereby the circuit of the
called person that had been interrupted by lever 5 in its initial position is.
closed.
Dated this 2nd day of March 1896.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C.,
Agents to Applicants.