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Патент USA US2104998

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Jan. 11, 1938.
F_ |_||_|_ ET AL
Filed Oct. 25, 1935
EMER GE/VCY 5734710”
FIG. 2
x T/W
Patented Jan. 11, 1938
2,1 42,998
Friedrich Lill and Benedikt Kudrna, Vienna,
Austria, assigncrs to Siemens & Halske Ak
tiengesellschaft, Wernerwerk, Siemensstadt,
near Berlin, Germany
Application October 25, 1935, Serial No. 46,672
In Austria October 31, 1934 >
10 Claims. (Cl. 179-5)
The invention relates to an impulse sender for the impulse sender from executing more than one
setting up telephone calls automatically by means rotation is removed from engagement so that the
of a single operation of the setting device. In impulse sender is free to rotate. This switching
an impulse sender of this type it is usual to pro
5 vide a disc, or the like, which can be displaced
along an axle and which serves as a setting mem~
her and according to the position in which it is
set effects the necessary impulse control. The
number of impulses to be transmitted is con
0 trolled by camsor the like, on the axle whose rela
tive position in each cam sequence varies accord
ing to the number ‘of the subscriber to be called.
When the disc has been set on one of the cam
sequences the latter is set in rotation together
with the other cam sequences by means of a
spring drive or the like and in conjunction with
the setting member effects the control of the im
pulse contact. Patent 1,965,122 issued July 3,
1934 to L. Kardorif shows an example of one form
20 of this structure.
The invention proposes to use such an impulse
sender both for calling the various subscribers
of the system in which case the setting member
is pushed to the appropriate position and the ap
25 paratus is then operated and released by hand,
and also for transmitting impulse ‘trains for' the
purpose of calling particular stations e. g. police
station, ?re station, etc., in which case the trans
mission of these impulses is effected independ
39 ently of the actual position of the setting member
without the apparatus being operated by hand
since in this case its release is remotely controlled
by means of keys or emergencycontacts _e. g.
means when operated switches over from the im
pulse contact which can be set by means of a
slider, to rigidly mounted contacts over which the
necessary succession of impulses for calling up
the police, ?re station, etc., are transmitted.
The drawing, Figs. 1 and 2, represents an em
bodiment of the invention. The invention is,
however, not limited to this embodiment. The
device shown is one in which only one particular
station is called by means of the electrical re
mote control, this being the police. It is clearly
possible to call a number of such stations e. g.
?re station, police station,v in a simple manner,
in which case, through operating diiferent keys,
various ?xed contacts are operated by means of
various electromagnetic switching means. Fig. 1
shows the general mechanical construction of
‘the impulse sender. The impulse sender con
sists of a displaceable contact lk (Fig. 2) on a
setting member such as 3 of the patent which,
with the cooperation of contact 32‘ (Fig. 2) trans
mits particular impulse trains to the exchange, 25
according to the setting taken up during the mo
tion of the impulse sender over cam discs such
as I‘! of the patent which are fastened to a shaft
I, with the object of effecting a simpler and more
rapid establishment of calls to stations which are
often in demand. The driving shaft l is asso
ciated with a driving spring which is not shown
which permanently strives to rotate the shaft 5
‘burglar alarm contacts. ‘This is of‘ great advan
35 tage since the transmission of the communicating
carrying the impulse cam discs, in the opposite
impulse‘ trains can be governed from any desired
toothed gearing (not shown). This rotation is
prevented by means of a disc 2, mounted on the
spot, independently of the position of ‘the impulse
The known impulse senders whose manner of
40 operation is described in the aforesaid patent
have the property that the driving springs, after
each operation and subsequent release, possess a
residual tension which is capable of producing
several complete rotations of the impulse sender.
This residual tension in the driving spring is now
used to effect the sending of impulses for the
special purposes such as calling up the police
or ?re station, etc. for which a special constant
succession of impulses must be transmitted.
A further characteristic of the invention resides
in that the release of the impulse sender for the
purpose of giving out the aforementioned de?nite
succession of impulses is remotely controlled by
means of an electromagnetic switching means
(relay) in that the locking pawl which prevents
direction, to that in which it is drivenby a '
shaft I, which possesses a slot 3 in which the nose
,5 of a pawl 4 engages. The pawl 4 which is
pivoted at its axis of rotation 6 is pressed into
the locking slot 3 by a spring ID. The corre
sponding elements of the aforesaid patent are
disc l3, shaft '1, slot 43, and pawl l2.
The mechanical release of the impulse sender
takes place, after the setting member correspond 45
ing to member 3 of the patent has been displaced,
by means of a lever such as 2 which rotates a
driving shaft 1 in the direction opposite to that
shown, whereby the locking pawl 5 is raised by
means of the screw 3 on the shaft i thus re
leasing the disc 2.
In the patent this is ac
complished by lever 2 engaging shaft II to dis
engage pawl ! 2 from disc 1 3.
The driving sprmg
is wound up at the same time.
During the mo
tion or the impulse sender the driving shaft 1 55
the b-lead over a second winding BII, contact
9b, ‘and contact l2ko of the impulse sender which
remains closed throughout the motion of the
rotates back into its original position, so that
after a single rotation of the disc 2 has taken
place the locking lever 4 is again operated into
the notch 3 by means of the. spring l0, and brings.
the impulse sender to rest.
Contact 1km‘ transmits the impulses
necessary for characterizing the calling'station
and for calling‘the police station over the a-lead,
The remotely controlled operation by’ means
of electro-magnetic.switching means (relay) is
operated'contacts 2b and 3a; contact ‘Ham, and
contact Bi or contacts wand 81‘. The selector
and connector are thereby operated to establish
10 subjected to current the projection 9 associated-.1 1 the emergency connection. Contact Ik which
with the armature moves downwardywhereupon l, is. operated mechanically remains inoperative
effected by a projection 9 associated with the ar
mature of relay B‘ (Fig. 2). When relay B is
during this transmission. After the impulse
' sender has come to're'st contact- l2ko opens and
the locking lever 4 disengages from notch 3 and
releases the impulse sender.
relay VB deenergizes-
Fig. 2 indicates the electrical arrangements.
15 The impulse sender possesses yet another con-V ‘
If the key Tisidepressed a second time after
the energizing' of relay B, contact Ilb prevents
tact 1km: Withdrawn from_the subscriber’s in
?uence, which in association with.’ contact 82' ' (the impulse- transmission which has already com-V
transmits the impulse trains necessary for se'-' ,menced,‘ from being interrupted.
lecting the particular station. The transmission
of the impulse trains characterizing the calling
subscriber is necessary so that the calling sub
scriber need not take up the receiver and yet the
called station will be informed as to which sub
scriber is in danger. During the motion of the
25 impulse sender contact lZko of the latter is per
manently closed-7 and characterizes the normal
station is connected for a normal call,.the latter 20
is. interrupted by the low resistance earthingw of
the b-lead iover relay A, and the same operations
are brought into play' as have already been de
If the key T is depressed while the impulse
sender is in operation .for setting up a normal
call, the partial connection already 'e?ected is
A and B bring about the operation of the ap
propriate contacts. All further details, such as
'30 the selecting switches or devices in the exchange,
brokendown by the earthing through low re;
35 nection with a subscriber which is provided for
by‘ the impulse sender, he takes up the receiver
thereby closing the usual subscriber’s loop cir
cuit to the preselector which operates in thewell
known manner to seize an idle. selector. He
40 then sets the.’ displaceablecontact lk over the
appropriate cam disc, and then operates the driv
ing device of the impulse sender whereby the
necessary loop interruptionsfor establishingthe
desired connectionby operation of the’ selector
45 and connector in the exchange are transmitted
over line a. contacts 217-, Ht, 6b, 82‘, and line h,
during the motion of the impulse sender thus
produced. 7The contacts 11cm: and mm which
areoperated mechanically remain electrically in
operative during this process.
If, however, the subscriber, who is in di?icul
ties, wishes, for example, to call the police, he
has merely transitorily to operate the key T which
is placed many desired locationand is connect;
-55 ed to the impulse sender by a line. A circuit is
V vc0
relay A, b-lead, and battery in the exchange, re.
lay A remains energized and the earth connected
to the exchange is maintained until the impulse >
121cc opens and the operations‘already' described
take place.
In anclaimed
v for
" ' establishing
' q tele
phone calls in which a setting member is em
ployed for selecting any desired station to be
called, means for operating said impulse sender 110
after said setting member has been operated to
establish a callto another station, and means for
operating said impulse sender to establish a call
to a different station independent of the operated
position of said setting member.
2. In an impulse sender for establishing tele
phone calls in which a manually operated setting
member isnused for selecting any desired called
station, manually operated. means for operating
said impulse. sender afterisaid setting member
has been set to'a desired station for establishing
a; call to that stationhand remotely controlled
means for operating said impulse sender to es
tablish an emergency call independent of the
operatedposition of said Setting member.
3., In an impulse sender for establishing tele
thereby completed for relay A: earth T, lib,
relay A, b-lead, and byway ofia relay in the phone callsin which ‘a setting member is manu
ally operated to a position corresponding to a
exchange which preselector is shown. diagram
matically, to. battery. This results in the opera desired called station, manually'operated means
tion of .thepreselector to select an idle selector for starting the operation of said impulse sender
switch. Relay B whichv is connected up in par-7
allel to the b-lead over: earth, operated contact
30., winding I of relay B, contact ‘17cm, operated
sistance.‘ , Over earthycontacts l27co, Ida, lib,
sender reaches its. normal position when ‘contact
If the subscriberwishes to establish a con
' position. of the impulse sender. The two relays
are shown diagrammatically while thegdetails
which are not essential for'understanding the
_If the key‘? is depressed. while the subscriber’s
to establish a’ connection with the station on
which saidsetting member has been set, remote
ly controlled means for starting ,the'operatio'n ofv
contact 5a,. is so adjusted, that it cannot ener
said impulse sender to establish a'connection with ‘
gize over the line resistance in parallel with the 'an‘emergency station independent of the' oper-"‘
low resistance relay A, so long as the key remains ated position of said setting member, and'circuit
depressed. As soon. as the key is released relay means for disconnecting an existing connection
B, energizes on account of the disconnection of ,with'a called station or one being set up ‘to a '
the parallel low resistance circuit of relay A; called station at atime when the remotely con
Relay A is slow to release on account of the pos
trolled means operates the impulse sender.
session of a copper slug. Relay B energizes and
4. Inan impulse sender as claimed in claim 3,
by the movement of its armature effects the me
means'forregistering the remote control opera
chanical release of the impulse sender in the tion of the impulse sender in case the impulse
manner already described. After the deener
sender is being operated for another call until
gizing of relay A relay B remains connected to it has reached- its normal position.
' 75
5. In an impulse sender for establishing calls
between stations having a setting member which
is moved to a position corresponding to a desired
station and in which a driving spring in said
sender supplies the motive power, manually oper
ated means for tensioning said spring and start
ing the operation of said impulse sender to estab
lish a call to the station selected by said setting
member, remotely controlled means for starting
10 the operation of said impulse sender to establish a
call to an emergency station independent of the
setting of said setting member, the residual ten
sion stored in said driving spring after each man
ual operation of said impulse sender being e?ec
tive to operate said sender when remotely con
6. In an impulse sender as claimed in claim 2
in which impulse contacts for calling other sta
tions and emergency contacts are provided and
20 in which said remotely controlled means includes
an electromagnet that e?ects the disconnection
of the impulse sending contacts for calling other
stations and connects up other impulse sending
contacts for establishing other emergency calls.
7. In an impulse sender as claimed in claim 3
in which after the impulse sender has been oper
ated in response to the remote control and dis
connected an existing connection the connection
of the calling telephone is reestablished.
8. In a telephone system, an impulse sender for
transmitting regular call numbers to connect with
called telephone lines and also for transmitting
emergency call numbers in which the sender is
transmit an emergency call independent of the
setting 01' the sender and independent of a pre~
viously established connection to a regular line.
9. In a telephone system, an impulse sender
having a set of impulse contacts for establishing 5
connections with regular called telephone lines
and another set of impulse contacts for estab
lishing a connection with an emergency line,
means in said sender for connecting said regular
impulse contacts for operation and for then op 10
erating them to establish a connection with a
called telephone line, a relay in said sender hav
ing a set of contacts for connecting said other set
of impulse contacts for operation, and remotely
controlled means for operating said relay.
10. In a telephone system, an impulse sender
having a set of regular impulse contacts for es
tablishing connections with called telephone lines
and another set of impulse springs for establish
ing a connection with a single special line, cir 20
cuit connections extending from each of said set
of impulse contacts to the telephone line, switch
ing springs manually operated to connect said
regular impulse contacts to the line to establish
a connection with a called line, a relay in said 25
sender, contacts operated by said relay to con
nect said other set of impulse contacts to the line
to establish a connection with said single special
line, said relay contacts also operated to discon
nect said switching springs from the line to in
terrupt any established telephone connection, an
emergency key located remote from said sender,
and means responsive to the operation of said
manually set to transmit regular call numbers to ‘ key for operating said relay.
35 connect with a called line, and separate means
for controlling said sender to automatically
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