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Патент USA US2099616

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Nov. 16, 1937.
Filed Aug. 29, 1935
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Patented Nov. 16, 1937'
Otto Muck, Marquartstein, and Ludwig F. Muller
and Paulv Zier, Munich, Germany
Application August 29, 1935, Serial. No. 38,466
In Germany April 28, 1931
34 Claims.
This invention relates to a device for time and
zone metering in telephone installations. These
‘devices are provided for recording the charges
to be made for calls, which charges are deter
-1 mined by the zone in which the called subscriber’s
' exchange is situated and by the duration of the
7 connection. The known devicesof this type use
a time switch arrangement which is constructed
as a selector and which is provided withas many
_] 3 switch arms as there are zone values.
All these
switch arms are stepped periodically during the
conversation so that at the end of the conversetion a particular contact is'marke'd by the switch
.r arm of the particular zone which was selected by
a zone determining device constructed as a simul
‘taneous movement mechanism and is then dis
covered by a meter stepping mechanism which
' leads to a simultaneous transmission of numer
ical current impulses. The time switches of these
20 known devices are thus necessarily bulky and
necessitate a considerable amount of wiring be
tween their large number of contacts and the
meter stepping mechanism.
The object of the invention is to simplify con
siderably the known arrangements for time and
zone metering.
The new meter stepping mechanism in accord
ance with the invention is energized for being
stepped forward by a time switching device at
the beginning or the end of a particular period
(01. 179-71)
trol. Likewise, the energizations produced for
the stepping can be produced by means of the
periodically stepping time switch device by acting
electrically or mechanically on the meter step
ping mechanism.
By means of the invention, a time and zone
metering device can be obtained in, which there
is no complicated wiring between the time switch
device and the meter stepping mechanism. Also,
the time switch device can itself be considerably 10
simpli?ed as it no longer has to be provided with
a number of switch members corresponding to the
number of zone values. '
In particular, the invention allows the time
switch device and also the meter stepping mech- 15
anism to be so constructed that on alteration of
thetariff, that is'to say, both when an alteration
is made to the length of time at the expiration
of which a charge is incurred and also in the units
which are used for charging for the individual 20
periods of time and for the various zones, a cor
responding adjustment of the time switch device
and/or the meter stepping mechanism can easily
be undertaken.
In order that the invention may be thoroughly 25
understood and be more readily carried into
e?fect, two examples of construction in accord
ance therewith will now be described with refer
ence to the accompanying drawings in which
Figures 1 to 10 relate to a time-zone meter in 30
of time and isprovided with devices which, at
which the meter steppingdevice is electrically
each energization, allow a stepping to take place,
influenced by a time switch device and by a zone
i the extentof which depends upon the “value”
of the connection ascertained by. a zone deter
determining device while Figures 11 to 16 relate
to a. time-zone meter in which the stepping device
mining device.‘ For [this purpose, the meter step
is in?uenced mechanically.
ping mechanism can send out current impulses
directly for in?uencing the meter at each step
ping. The individual steppings can be used, how
diagrammatic front view of the time switch de
ever, for storing the metering current impulses
which/in that case, are sent out at the end of
the/connection sent out by the return movement
Figure 2 is a diagrammatic side view of th
time switch device and the meter stepping device. 40
Figures 3 and side elevation and in
of the meter steppingjnechanism into the normal
Preferably, the meter stepping mechanism is
constructed as a rotary disc provided with devices
Figure 1 of the accompanying drawings is a
vice and the meter stepping device.
section one. of the selectors of. the zone deter- ‘
‘mining device.
Figure5 shows the circuit for the time-zone 45
Figures 6 and 7 show diagrammatically and
are arranged in a number of concentric rows cor-5
responding to the number of zone values. These ‘in two positions a control device for the meter
for ‘determining the extent of its rotation which,’
_ devices can limit the stepping oi the meter step
ping mechanism by electrical or mechanical con
stepping device.
Figures ,8 to 10 show the general front, rear 50‘
and i3 and, therefore, the disc I l are held against
rotation in either direction by the two check
and'side elevations respectively of arrangement
of the time and meter stepping devices.
Si and S2.
Figure 11 is a diagrammatic illustration of the pawls
- Stops Pl or P2 are arranged on the armature
time-zone meter of the second example or con ,levers HI and H2, one of which, on movement
of the corresponding armature lever, abuts
Figure 12 shows a section through the time
against the appropriate lever Zl or Z2 and thus
zone meter.
lifts' the check ‘pawl associated with it out of
Figure 13 shows the meter stepping mechanism. _
engagement with the appropriate wheel.
Figure 14 shows a detail of construction of a
' In ‘Figure 7, the arrangement is shown in the 10
10 mechanical zone determining device. _
position in which the armature of the magnet DR.
Figure 15 shows a contact arrangeme t of the
is about half attracted. During The ?rst part of
zone determining device, and
movement of attraction, the stop vP2 oi the
Figure f6 is a diagrammatic illustration in per- ~ the
armature lever H2 abuts against the lever Zl
spectiveloi the control device for the meter
15 stepping mechanism.
The meter stepping device (referred to in what
follows as the "tari? member”) of the example
of ,construction illustrated in Figures 1 to ill
relating to an electrically operated arrangement
20 consists of a rotatably mounted disc ll (Figures
1 and 2) which can be driven in the ‘forward
direction through'a driving member l2 andin the .
_ rearward direction through a driving member it.
A stepping magnet DV, the pawl of which can
'25 engage in teeth formed on the driving member it,
is provided for stepping the driving member lt.
A similar electromagnet DR is provided for step
ping the drivingmember it’. The two driving‘
members lt and lil whichare inthe form oi’
ratchet wheels are arranged on the sleeve it
which also'carries the disc ll. This sleeve also
carries a cam 28 through which contacts drl, t
and ll can be actuated.
with the teeth’ of the wheel l3.
As the move
ment of attraction of the armature continues,
the stop P2 clears the lever Z! and when the
armature .is fully attracted, the check pawl Si
is again free from the in?uence oi the stop P2
and engages with the teeth of the wheel l2. The
check pawl Si is thus ._ only out of engagement 25
with the wheel l3 during the stepping movement
of the pawl A2. When the armature returns to
the position shown in Figure 6, the stop P2 moves
to the right until it abuts against the lever Z!
and causes this lever to move about its pivot ZSI 30
against the action of the spring Fl. The check
pawl Sl thus remains engaged while the driving
pawl At is being disengaged.
The pawls Al and S2 are actuated by the mag
In‘Figures 6 and 7, for the sake of clearness,
I as the ratchet wheel lt is shown smaller than the
ratchet wheel it.‘ .In practice, the two wheels
are preferably of the same diameter.
and forces it bodily towards the left so thatrthe 15
check pawl SI is removed ,from the teeth of the
wheel‘ it while "the driving pawl A2 slides down
on the ?xed pin T2 and comes into‘ engagement
The 'two wheels it and ‘it are provided with the
same number of teeth. ' The toothed wheel ltl,
serves ilor ‘stepping the disc ll in the clockwise
direction and the ‘toothed wheel l3 ilor stepping
in the counter-clockwise direction. A check pawl.
Sl pivotally mounted on. the pin LSl engages
with the ratchet'wheel l2._- The tail of the pawl
net DV in the same way as are the pawls A2 and
Si by the magnet DR. ‘Whenever, the disc Ii
is stepped by one of the. wheels l2 and i3, the‘
check pawl associated with the ‘other wheel is"
always removed out of engagement with the
Sl carries a lever Zl pivotally mounted on the arrangedvso that
’ pin ZSl and connected at one end to a spring Fl
which pulls one arm of the lever-Zl against a . spending
and got, and, cot,
pin TSl on the pawl Sl and
on the rear sides
Sl to engage in the teeth of the wheel l2. The
pawl St is constructed'in the same way rela
tively to the wheel ld as is clear irom‘Flgure 6
-on the left hand side of which will be i’ound
references corresponding to those on the right
The disc vll of the tariff member (Fig. 1) has
teeth it formed in its periphery through which ‘
a contact to’ can be actuated.
A number of series of earns it are arranged on
the two faces<of the disc ll. These cams are 45
one or the other of a corre
sets of contacts 203, zo5,.z0.'l
208 arranged on the front and
of the disc can be actuated by
them according to the angular disposition of the
In the example shown in Figure l, the cams [6
are arranged on the front side of the disc H in
seven concentric rows, the cams in each of which
actuate one,oi seven'di?erent sets of contacts
A driving pawl Al pivotally mounted on the pin. ' can
cot to and, which correspond to zone values _2
‘Hill on a lever Hl forming an extension oi the \to t. Cams and contacts are arranged in simi- '7
armature otthe magnet DV is provided for stem‘ lair rows on the rear side of the disc ill (see
‘ping the ‘wheel is. The armature lever‘ Hl is
the angular distance between the,
- pivotally mounted on the pin ml and is moved
60 .on energization of, the magnet DV.’ A; spring
. <65
Figure 2) but
cams lt on corresponding circles is different on
the lront andon the rear sides of the disc ll.
normally" holds the lever Hi in the illustrated
The angular distance between two cams on one
position in which the pawl Al bears on a-pin Tl circlecorresponds
to the meter units which are
and is thus out of engagement with the‘teeth of to be registered at the beginning of a particular
the wheel it.‘ ‘The stepping mechanism tor the 1 period of time, for a call to] the zone correspond 65
wheelit consisting of the armature lever H2 and ing- to that circle. More vunits have to be regis
the driving pawl At is constructed in the same
tered on the meter-fora call 01' a certain duration
manner as that for the wheel l2 as-can clearly . to
a particularzone during the'daytime than
be seen from an inspection of the right hand ‘side ' during the night. (For example, only two thirds
of Figure 6 where the parts have been given
~70 references corresponding to those .“on; the leit
I It" is clear» that the driving pawl Al. tor the
wheel l2 lies'close to 'the checkpawl Stfor. the
wheel it and the driving pawl ‘A2 lies close- to
of the-day charge may be made at night.) The‘y’m
cams on ‘one side or the disc H‘ can thus corre
spond to the day tariff and the ‘cams on the other side of.v the disc correspond'to thev night tariff,
th relationship between thehhgtilardistances'
the check pawl Sl. The two ratchet wheels l2' on etwo sides being the-same as that between,
the units to be registered of corresponding day
while the second series of current impulses in
and night calls.
?uences the magnet DB of the selector illustrated
The cams can be ?xed in suitable holes in the .in Figures 3 and _4 which steps the switch arms
stamped-out circular sheet metal disc. In this
case, an alteration of the tariif only necessitates
of the latter through 10 steps at each energiza
tion. The third series of current impulses then
in?uences the magnet DC which steps the switch
arms of this selector through single steps. The
the replacement of a stamped disc by a new one.
switch arms of the zone determining device are
The time disc I‘! is arranged beside the tariff
10 disc H and its stepping mechanism l2 and I3 and
only diagrammatically indicated in the drawings.
disc ll.v The disc I I can, however, be made up
of a rim and a hub between which is fixed a
.has ratchet teeth I! on “its circumference in
which can engage the stepping pawl of a driving
magnet DZ. _This time disc I‘! also carries sev
eral series of cams lsparranged in concentric
circles which can actuate contacts.
db/c2-8 in Figure 5. ‘Only two such switch arms
and corresponding series of contacts are indi- cated but in practice nine are provided. a
The contacts, the references of which are un 15
In Figure 1 four sets of contacts dz3, dzl, dz5
derlined in Figure 5,v are mechanically controlled
and trz are illustrated which are controlled by
four circles of cams l9. Further sets of contacts
by one of the above-mentioned stepping switch
mechanisms. The contacts wal, 2, and 3 repre
such, for example, as the set dzl, 2 can be direct
sent contacts which are controlled by the shaft of
the 10-point stepping switch mechanism which is 20
stepped by the magnet DA. They are closed on
the return of this selectorto the normal position.
The contacts wbl and wb2 represent contacts
which are thrown by the shaft of the 110-point
selector on its leaving the normal position. The 25
contacts we! and wc2 are only actuated'by the
shaft of this selector when a stepping is effected
by the magnet DC. In the positions of rest into
which the switch arms of this selector are stepped
at various times by the magnet DB, the ‘contacts 30~
20 ly controlled by a cam disc 20 fixed to the disc
I1. The cams l9 and the cam 20 serve‘ for con
trolling the various contacts with special settings
of the time disc I‘! for carrying out the necessary
switching operations.
The switch arms 24 of the selector illustrated in 10
Figures 3 and 4 are designated db/ci and ‘
The stepping switch mechanism illustrated in
Figures 3 and-4 forms part of the zone determin
ing device. This switch mechanism comprises a
contact panel 2| with nine rows each of 110 con
tacts and a rotary selector 23 carrying nine
30 switching'arms 24 insulated from each other ar
ranged on a shaft 22. The selector 23 is pro
, vided with two stepping wheels 25 and 26. The
stepping wheel 25 has 11 teeth in which the driv
ing pawl of a magnet DB can engage. When the
wheel 25 is stepped through one tooth, the switch
arm is moved over 10 contacts of the panel 21.
The second stepping wheel 26 has 110 teeth in
which the driving pawl‘ of a magnet DC can en
gage. A-number of cam discs 21 are also con
v40 nected to theselector 23 with which sets of con
tacts wb and we are‘ in contact. These contacts
are thus controlled by the cams 21 on rotation of
the selector 23. When such a rotation is effected
by the intermittent energization of one of the
magnets DB or DC, the switch arms 24 move
freely past the contacts on the panel 2!. For .
establishing electrical contact between the switch
arms 24 and the contacts, the selector 23 is axial
ly displaced ‘by the armature of a magnet EM so
50 that the switch arms are pressed on to the-con
tacts. The armature of the magnet EM is me
chanically locked in its attracted position and is
only released again‘on energization of a mag
net AM.
For selection of one‘ of the nine switch arms 24'
of the selector 23, a usual 10-point step-by-step
‘switch is used which is constructed in the ordi
nary way of well-known preselectors and is set
by current impulses.
The circuit illustrated in Figure 5 shows the
path of the current for the various stepping mag
nets and the necessary controlling relays of a
time-zone meterwhich, for example, is connected
in the connecting line connected to the contact
65 bank of a ?rst group selector leading to a second
group selector.
It is assumed that three series of
wc remain in the normal position.
The contacts dZl-S represent contacts which
are actuated by the various cams 19 of the time
disc ll. The ?gures appended to the reference
dz indicate the positions in which these contacts I
are thrown.
The contacts dill-3 are contacts which are
reversed by the shaft M of the tariff device I I
when the latter moves out oi.’ the normal posi
When the line a, b, c is seized by a ?rst
group selector arranged in advance of it, the hold-.
ing relay C in the time-zone meter is energized
in a circuit which runs from the ?rst group se—
lector (not illustrated), through the line 0, the
contact st3, the relay 0, the contact 83, the line‘
0" to the second group selector (not-illustrated) .
The relay C thus responds and, through its‘ con
tact c2, closes the following circuit for the mag~
net DZ of the time- switch member:—
+, 10-second switch SS, contact 02, time
meter ZD, contact e4, stepping magnet DZ,—
The contact 04 closes a holding circuit for
the relay 0 so that the latter remains energized
independently of the voltage in the line 0" in the
second group’selector. The contact 05 discon
nects the line 0' from the line 0" through which,
for example, the outgoing connecting line can be
seized by the distant exchange.
The 10-second switch SS closes the circuit for
the magnet DZ every 10 seconds sothat the time 60
disc is stepped through one step every 10 seconds.
This stepping is alsoused in order toyprevent the
time-zone meter being held engaged for an un- '
necessarily long time. As, in general, no charge
is made for the time which elapses between the
seizing of the time-zone meter and the instant '
vcurrent impulses are necessary for determining
at which the called subscriber removes his re
the zone which at the same time effect the set
ting of a second, a third and a fourth group selec
' ceiver, a subscriber can, as a rule, hold a valuable
trunk line for an unrestricted period by means of
tor. The emission of these current impulses si
an incomplete dialling operation. If this waste
multaneously eifects the settingof the selector of engaged time is to be restricted to a maximum
of the zone determining device and indeed, the ' of three minutes, then at the. eighteenth step of
first series of current impulses controls the switch the time disc,‘ the contact trz is thrown by a cam ,
arm da of a 10-point stepping switch mechanism arid thus the following energizing circuit for the ,
75 which is driven by the switching magnet DA, cut-off relay S is closed:
a relay H is, also energized through its winding I
+, contacts stl, ci, 3!, vi, trz, winding I-of
relay 8,-—
and prepares the circuit for the energization of
the relay U. The relay H is slow to release and
holds its armature. attracted during the trans:
mission of current impulses.
Relay S "responds in this circuit, disconnects
' the line by the opening of its contacts si , 2, and 3
whereupon the second group selector becomes
seizable by means of the distant exchange over
- At the end of the second series of current im
the lines a’, b’, 0' through the contact s3. By
means of the contact s4, the following energizing
circuit is closedfor the relay E:
+, contacts std, cf, 34, winding III of -
pulses, which effect the stepping of the switch
arm db/c in large steps, the relay V again drops,
interrupts the holding circuit for the relay R
with its contact all and, at the same time, through 1.
relay E,_ I
its contact cl, closes the following energizing cir
while the contact 35 closes the following circuit
for the buzzer Sui :
' +, contacts std, cl, winding HI of relay B,
winding m of relay J,‘ contact s5, condenser,
buzzer Sui
cult for the relay U:
‘+, contacts. S154, cl, zl, vi. hi, winding I of
relay U, contacts wa2, e3,wc2,magnet DA,-a§ Well as the following holding circuit‘ for the 15
relay Hz-
A- deeper buzzing tone is thus produced in the
windings I, II of the relay J which lie in, the
speaker line which informs the subscriber of the
+, contacts 3“, cl, zl, M, M, M, winding 11
of relay H.contactsvl,rl,wc2.masnet DA.——
The relay U responds and, with its Contact ul.
cutting off of the connection.
The relay’ E holds up during the closing of its
contact at through its windings I, II, opens the
impulse circuit for the setting of the zone de-'
termini'ng device by means of its contact at and,
through its contact e4, brings the time disc to
rest. ‘When the ‘calling subscriber hangs up, all
switches the circuit over from the magnet DB to a.
the magnet DC.
When, during the third series of current im
pulses, the relay V again responds, the holding
circuit for the relay. H is interrupted by the con
tact of, while, on the other hand, the following _ 8
holding circuit for the relay U is closed:-— v
parts of the said switch mechanism which have
+,-contacts st4, zi, oi, f4, a2, winding II of
been displaced return into the normal position in
relay U,--
almanner which will be described in more detail
At the end of the third series of current im
later on.
pulses, the relay V drops but again in a delayed 30
The case will now be considered in which the
subscriber sends out the various series of current
impulses for making the connection within the‘
above mentioned time. ' During each, emission of
fashion and with its contact at closes the follow
ing circuit for the magnet ‘EM:--'
. ,
+, contacts st?, cl, at, of, met, 15, e5, magnet
current impulses, the relay J will be intermittently
energized through its windings I, If in the fol-
This circuit is closed during the time during which 3|
the relay ‘U is tie-energized. On being ener
lowing circuit:—
’ a-wire, relay J, windings I and If, contact
gized, the magnet EM presses the switch arms
db/c of the zone selector (which is free to move
- ,
By means of the contact ii, the current impulses
the contact bank, The armature of the magnet 40
are transmitted to the o."-wire and the selector
vof the Zone determining deviee is also Set- For
this purpose, the contact it is formed as a double
EM is mechanically locked so that the contact
remains ‘made also'when the'magnet is'no longer
make contact and closes the following circuits:—
+, contacts 012$, ‘it. $?pwire 0i"
energized. The contact wci lying in the energize,
tion circuit of the magnet EM is, similarly to the
contact wct, reversed in single steps during the 4|
stepping of the switch arm through the magnet
+, contacts daft, c?, chat», all , rt ,wct, stepping '
magnet DA,——
A contact-is now selected by the switch arm
The step-by-step enersization of the magnet ‘ db/c selected by the setting of the switch arm da,
DA and, therefore, the step-by-step stepping of this contact being connected to the zone contacts 5.
the Switch arm em 01? the ?rst Selector of the I‘ 202 to h. Only three of the zone contacts 202 to
zone determining device is edected by the (iIi-r-v set are shown, but'each of these is double, one
rent impulses, During the series of current imPulses’ the relay V is at the Same time energized
through the Contact m which 15 Slow to release and
holds its armature attracted during ‘the, pauses,
_ between time News‘ current impulses At the
and °f the ?rst’ ewes “fcumnt impulses‘ the
for the day side and the other for the night side
of the tari? switch. At this instant, the contacts
are,'however, at rest because'the disc of the tariff 5‘
switch has not yet been stepped. It is assumed
that the zone 3, for example, corresponds to the
connection determined by the three emitted
relay v drops and’ by means/of the Contact M’ - series of current impulses so that the contact 203
Switches in’me WI‘WR m the following circum-
is selected by the switch arms do and db/ci. The 0.
'+’ coptacts 8m’ c“! 2n’ N’ M’ winding 1 of
following short circuit for the winding I of the
relay R" Bantams Wm’ 83’ W02’ magnet DA'_'
rela S is now closed through the normal position
Relay R respondsand, by means of its contact
rt, switches the stepping circuit over from the
‘magnet DA to themagnet DB.
_ _ When, during the second series of current im-
w t_
of thls con 0 '—
_ I
1 ~
> \
—, contact sot, switcharms db/ci, da, contacts 1512' won’ wtndmg I °f_re1a_‘y S'_
pulses, the relay ‘V again responds, ‘the circuit
In the. absence of @1115 Short cn'cuftiv?he relay
running through the winding I of the relay R is
S wouldbe energized?hmugh its ‘111_1d1_ng I and
v interrupted by the switching over of the contact ‘ the °°nn¢°t1°n “01nd be cut_-°?- lglThls 1S always
mg and, in its place, the fonowing .holding cir__ the case whenv the selectec‘ :witch arm (112/0 70
mm; is closed through the’ winding- ]1 bf the re- comes on to a contactvwhich is connected with
Jay 3:...
, none of the zone contacts, that is to say, when a
+, contacts std, ‘Ct, at, jut,v 1-2, winding 11‘ of
. _i I‘. t‘
relay R";-
".(75,'_Dul'1ng this second series of current impulses,
connection to an exchange is selected which is not
“zoned” and thus does not exist.
In ‘this case,
the cutting on ofthe'connection will be effected 73
by the time-zone meter and the line will become
+, contacts std, cl, zl, (123, II, 125, magnet
During all the time taken by the setting of the
zone determining device, the time disc is stepped
through one step and the contacts dvl, (i122 and
every 10 seconds.
(103 are reversed.
If, after the setting of the zonev
determining device, the meter device given when
the called subscriber answers is not received
within three minutes after the seizing of the
time-zone meter, then, as has already been ex
10 plained above, the time switch, at the eighteenth
step, will actuate the contact ire by means of a
cam so that the short circuit for the winding I
of the relay S is interrupted and so that the relay
S responds and cuts off the connection.
The bringing into action of the meter when the
desired subscriber answers is effected in known
fashion by switching current on to the 1)" line in
the subsequently arranged selector. In this way
the relay is energized in the following circuit:
+, contacts 325%, c l, winding II of relay B, con
tacts 23, $2, b",—
In the known arrangements of time-zone meters,
the meter can be prevented from being brought
into operation if the calling subscriber dials
N “l” in quick succession.
This possibility is pre
vented by the special arrangement of the relay
provided for bringing the meter into opera
tion. Through a contact v2 of the relay V which
is energized during an emission of current im
30 pulses by the calling subscriber, a second winding
of the relay B is switched in in opposition to
‘the winding II of this relay connected to the b"
wire. The result of this is that with a small
alteration of the potential at the common switch
ing point of the two windings, the relay B is
made to respond with certainty.
The relay B is thus energized as a result of
the indication that the meter is to be brought
into operation and, by means of its contact bl,
closes the following energizing circuit for the
relay Z:
+, contacts st4, cl, bl, meter ZGB, relay Z,»
This relay Z is through parallel switching and
forward connection delayed in its response by
resistances so that it only responds when the
impulses for setting the meter into operation are
of su?icient length. At the same time, a test is
made through the contact M of the relay B as
to whether the day or night tariff is in operation.
During the night, the switch N is reversed so that
the following circuit is closed for the winding III
of the relay H through the contact b2:—
+, contacts n, b2, i4, winding III of relay
The disc of the tariff switch gear is thus switched
In the position l8 of the time disc, the contact
4123 is opened by a cam and the relay interrupter
is thus disconnected. The time disc is now
stepped every ten seconds through the 10-second
switch SS.
At the nineteenth step of the time disc, the
contact dzi is reversed and thus, the stepping cir
cuit controlled by the contact u3 of the relay in
terrupter is transferred from the magnet DZ to
the magnet DV which effects the forward con
nection of the tariff member. At the 20th step of
the time switch, the contact 1123 is again closed
and the relay interrupter is thus again brought
into operation. A rapid stepping of the magnet
DV and, therefore, of the tariff member is now
effected by the contact a3 and, indeed, until the
zone contact 203 mechanically selected by a cam
is reversed. When this contact is reversed, the
following circuit for the magnet DZ is closed:—
+, contacts, sill, cl, 2|, v4, 73, switch arm da,
switch arm db/c, contacts 203, 723, magnet
The time switch is thus stepped through one
step on to the twenty-?rst step at which the con
tact 1:123 is again opened so that the relay inter 3O
rupter is disconnected and no further stepping of
the tariff member takes place. At the beginning
of the conversation, the tariff member is, of
course, stepped to an extent which corresponds to
the basic charge for the selected zone.
The extent to which it is thus stepped is, for
example, that corresponding to a conversation of
a duration of up to three minutes.
At the ex
piration of three minutes, the tariff member must,
therefore, be further stepped. For this purpose, 40
the contact 1123 through which the relay inter
rupter consisting of the relays R and U is switched
is again closed, in the position 39, by the time
switch which, during this period, has been stepped
every 10 seconds by the switch SS. The contact 45
u3 then again causes an intermittent energiza
tion of the magnet DV of the tariff member which
is stepped until one of its cams reverses the se
lected zone contact 203. The following stepping
circuit for the magnet DZ of the time disc is then 50
again set up:-
+, contacts stl, cl, 2!, 114, T3, switch arm da,
switch arm db/cl, contact 203, h3, magnet
55 which maintains itself through its own contact
h2 and, with its contact h3, switches the zone
testing circuit on to the contacts 203 to 208
on the night side of the time disc. The relay Z,
by the opening of the contact 23, opens the cir
60 cuit for the relay B and also, by means of its
contact 'zl, closes a holding circuit for itself. A
relay interrupter formed by the relays R and U
is also switched in by means of the contact zl
in the following circuit:—
+, contacts‘ st4, cl, zl, 0123, r4, winding II of
relay U,—
The relay interrupter now, by means of ' the
contact 1L2, effects the accelerated stepping of
70 the time switch DZ into the position I8ythrough
the following circuit:—
+, contacts a3, f2, dzl, a2, magnet DZ,—
During the release of relay B, the stepping mag
net DV of the tariff switching mechanism is en
75 ergized once in the following circuit:—
The time disc is stepped through one step into 55
the position 40 in which the contact (Z23 is opened
so that the relay interrupter is switched out and
the stepping of the tari? members is thus inter~
, Now, at the conclusion of any minute of the con—
versation, a further charge becomes due to be
For this purpose, the time switch causes
the tariff member to be stepped in the positions
46, 53, 60, 61,14, 8|, 88, 95.
In, order to warn the speaking subscriber of 65
the further charge to which he will be liable at
the conclusion of the initial time allowance, the
following buzzing circuit is closed by a dam of the
time disc shortly before this charge becomes due,
that is to say, before the tariff member is
stepped:+, contacts std, cl, winding III of relay B,
winding III of relay J, contacts (125, th,
condenser, Su2 .
A higher buzzing tone is thus transmitted 75
through the speaker wires. The contact dad is
closed in the positions tit, d5, 52, 5t, tit, ‘it, til,
til, 94, mi. By the closing of the contact 1125, a
thermal relay Th is energized which, through the
opening of its contact th, imposes a limit on the,
duration of the signal...
At the conclusion of the maximum allowable
time of conversation, at the expiration of 12 min
utes, for example, the time disc arrives in the
10 position me. In this position, the contact trz is
fully reversed by a cam of the time disc so that
the double make contact is actuated. In this way,
the following energizing circuit is closed for the
+, contacts sit, ci, 2!, M, tg, winding II of
relay B,“
At each response the relay B closes the following
meter circuit through its contact b3:
—, meter ZS, contacts i3, b3, b-wire
In order to reach the ‘normal position, the disc
of the tariff switch mechanism has to be moved
back through the same angular amount as it was
stepped forward during the conversation.
number of times the contact tg is closed thus 10
corresponds to the number of the units of charge
chargeable in accordance with the duration of
the conversation and the selected zone.
When the tariff disc reaches its normal posi
disconnecting relay S:
tion, the contacts dvl, a302, (Z123 are again returned
+, contacts std, cl , 2i, trz, winding I of relay
into the illustrated normal position. The con
Relay S responds and, in the manner described tact dvi interrupts the stepping of the magnet
DR. The contact 11122 interrupts-the energization
above, causes the call to be cut o?‘.
If the conversation ends before the expiration circuit of the relay 0 which releases and thus 20
20 of the maximum allowable period, then, in known also de-energizes the relay ‘V. By the interrup
manner, when the calling subscriber hangs up, tion of the circuit for the relay J, the prearranged
current is switched on to the a wire in the group. ?rst group selector is disconnected in known
selector acting as a metering indicator. As a con
sequence, the relay J is energized in the circuit:—
Zz-wire, windings I and II of relay J, contacts
d122, st2,+
The relay J short circuits its winding II by
meanspf its contact l5 and thus strengthens the
current ?owing through the a-wire whereby the
30 calling subscriber, in known fashion, is prevented
from breaking the connection with the ?rst group
selector. The contact it prepares the meter re
peater _ circuit while the relay ‘Vv is energized
through the contact it if the time disc is not ex
35 actly in a position in which the tariff member
can he stepped. The following circuit is thus
+, contacts dad, i2, relay V,-—
The contact ct prepares the energization of
40 the relay B andat the same time causes the relay
F and the release magnet AM to be energized in
the following circuit:—
+, contacts std, ci, zl, ct, dot, relay F,--and
magnet AM,
+, contacts std, cl, 1122, relay F,
which again effects the energization of the relay
S, winding II. The magnet DA of the ?rst selector
of the zone determining device is now stepped ‘into
the normal position by means of the relay inter
rupter through the following circuit:—
+, contacts 213, f2, doll, wal, magnet DA,—
In the normal position, the contact wal is re
versed and thus the stepping circuit for the mag-' '
net DC is closed in the following circuit:—
-I-', contacts 113, f2, dvL'wal, wd2, magnet
When the switch arms db/c reach the normal
position, the contacts wbl and wb2 are re
versed. The following stepping circuit for the
time disc is now closed by the contact wb2:
+, contacts 11.3, f2, dull, wal, 10b2, magnet
When the time dischas also returned to the '
are removed from the contact bank and thus the
zone testing circuit is interrupted. The relay F
responds'and closes the following circuit with its
S is interrupted. All the switch' means and
relays are now back again in the normal position.
It can happen that certain exchanges only 50
have two characteristic ?gures, the dialling of
which is to determine the “value” of the zone to
‘Contact it switches the stepping circuit inter
mittently closed by the contact at over to the
magnet DR which now e?ects the step by step re
turn movement of the tariff disc into the nor
mal position. Relay S, by opening of its contacts
sll, s2, s3, cuts off the connection. The relay E
is then energized through the contact st as fol
interrupted. After release of the relay C, ,the fol
lowing energization circuit for the relay F is
On attraction of its armature, the magnet AM
releases the mechanical locking of the armature
of the magnet EM so that the switch arms db/c
contact it for the relay interrupted and for the
energization of the relay S:—
_ +, contacts sit, cl, 2i, ct, d123, fl, rt, winding
II of relay U,—and contact 'ji, winding II of
fashion so that the'circuit for the relay C is also‘ '
+, contacts stli, cl, st, winding III of relay
and maintains itself through its contact ed.
-The contact e2 opens the circuit for setting the
zone device into operation and the contact ct
interrupts the time disc stepping circuit.
70 > During’ the stepping of the tariff member into
the normal position, the contact to is mechan
ically actuated by the teeth on the periphery of
normal position, the contact (122 is opened and
thus the energization circuit for relays F and
which it belongs. ~ In this case, after the time
zone meter is seized, only the switch arm, da is
set by the emission of the second series of cur
rent impulses, the switch arms db/c being only
incompletely set by being stepped through large
steps. In order that ‘the zone may be properly
determined in this case, when the relay B and 60
therefore the relay Z have been energized, the
switch arms db/c are stepped through one addi
tional step. During the time during which the
relay B is de-energized, the following energizing
circuit for the magnet DC is closed for a short
+, contacts sit, cl, zi, dz3, fl, b5, ul, magnet‘
At this instant, the relay U still holds its arma
ture attracted because, due to the incomplete
setting of the zone determining device, it re
mains energized until energization of the relay
the tariff disc and, each time it is closed, ener- - Z.
75 gizes the relay B in the following circuit:—
The zone contact of such an exchange
is therefore always closed during the ?rst step 75
2,089,6 16
of the decade determined by the two-?gure call
If all the exchanges that can be selected have
only two-?gure call numbers as is, for example,
the case when the time-zone meter is connected
behind a second group selector of a main ex
_.change, then the selectors DA, do are dispensed
with and only a single switch arm dc/c has to be
provided. The contacts wal and we! must then
10 be bridged in the manner indicated in dotted
If a call is made within the local zone or to
a- service station, then there is no charge to be
tari? disc allows the calling subscriber to hang ‘
up in the case of error so that it is only the
charge for a local conversation which becomes
due to be made. The tariff disc is, in this case,
only stepped through a single step when the
called subscriber answers. “If, however, the call
ing subscriber delays hanging up for more than
20 seconds, then as described, the tariff disc will
be stepped tolthe basic extent determined by the
dialled zone.
In the described example of construction, the
units of charge incurred during the conversation
this case, on release of the relay V after emis
sion of the ?rst series of current impulses which
acts on the' time-zone meter, the relay E is
were stored by the tari? disc and were only trans
mitted to the calling subscriber’s meter at the end
of the connection. This is not, however, neces
sarily the case in accordance with the invention.
The switching steps can indeed. be arranged to
take place so‘ that the transmission of the meter
impulses to the calling subscriber’s meter is ef
fected when the tari? disc is stepped by the con— 20
energized in the following circuit:—-
tact tg without any storing of the meter impulses.
made according to the length of the conversation
but only a single basic charge. The'exchanges of
service stations have, for example, a l or a 0 as
the ?rst effective ?gure of their call number. , In
+, contacts std, cl, zl, vi, trz, da, winding I
of relay E,
The relay E closes a holding circuit with its
contact ei through its windings I and II and,
with its contact, e4, interrupts the stepping cir
cuit for the time disc DZ.
If then, the meter
is subsequently. brought into operation by ener
gization of the relays B and Z, as. already de
39 scribed, the magnet DV is energized once through
the contact w5 until release of the re‘ay B, so that
the tariff disc is moved one step out of the nor
mal position. When the connection is broken, the
tariff disc must, therefore, be switched- back
through one step into the normal position so that
only one unit of charge is made through the con
tact tg.
There may be regulations to the effect that
for calls between the various exchanges situated
Clearly, special metering switches can be con
nected in the various circuits of the time-zone
meter for statistical‘ purposes. Thus, when the
time-zone meter is seized by the prearranged ?rst
group selector, the lamp BL and the meter ZB are
energized through the contact cl~ so that the
number of calls is recorded.
In the circuit in which the time disc is stepped
under the'in?uence of the 10-second switch SS, is 30
connected a meter ZD which indicates the time
during which the time-zone meter remains seized.
Ameter ZGD can also be connected to this circuit
through the contact .24 of the relay Z energized
after the meter is brought into operation and
which records the duration of the conversation.
The meter ZGB lies in the energization circuit
of the relay Z and, at each energization of the re
lay Z, is energized and therefore marks up the
in a particular zone, the zone 2 for example, .
number of times the meter is eiiectively brought
only twolocal units are to be charged for an
into operation. The meter switch ZS lies in the
meter impulse circuit through which the meter
impulses are transmitted to the b~wire and marks
up the number of transmitted current impulses.
By means of these five meter switches, all infor
unrestricted time of conversation bothvduring
the day and during the night. For this purpose,
the contact .202, which is reached with a par
ticular setting of the- zone determining device,
is connected in such a way that on reversal of
this contact by means of the cam of the stepped
tariff disc, not- only is the time disc stepped
through one step for bringing the tari? disc to
rest, but the relay S is also at the same time
energized through its winding I so that no fur
ther stepping of the time disc takes place under
the in?uence of the 'lO-second switch SS. The
tariff disc cannot, therefore, be stepped further
and, at the end of the connection, only a number
of metering impulses corresponding. to this set
ting of the tariii disc, two, in the present ex
ample, can be transmitted.
mation necessary for statistical purposes can be
The general arrangement of the time and me
ter stepping device for the time and zone deter
mining device withva time and tariff device is
shown in Figures 8 to 10.
A stationary shaft W is mounted’ in two bear~
ings Li and L2 on a base plate G. The time disc
I"! is movably mounted on the shaft W in the
neighbourhood of the bearing Li and can be
stepped by means of an electromagnet DZ. On
the side faces of the time disc I1, cams iii are ar»
ranged which control the sets of contact springs
These sets of contact springs are also ?xed
on the base plate G.
The tariff disc H is arranged on the shaft V!
into its zero position by the magnet DV. In this .
zero position, the fault relay St is energized in in the neighbourhood of the bearing L2 and has
von both side faces cams it which control the sets
the following circuit:-‘
of contact springs 20. .The tariff disc H has
+, contacts std, cl, 2|, r5, ,3, winding I of
teeth i 5 on its periphery for actuating the sets
relay St,‘contact d222,
of contact springs tg. The two stepping ratchet
- Relay ‘St, with its contact stl, closes a holding
If, for any reason, the tariff disc when stepped
fails to test any zone contact at all, it is stepped
circuit through its winding II, breaks the seizing
wheels l2 and I3 are connected to the tariiT disc
circuit for the relay C by means of its contact
H through the sleeve M and are provided with
oppositely disposed teeth. The wheel 12 is
stepped by the magnet DV and the wheel l3 by
the magnet DR.
st3 and, by opening the contact std, interrupts
the basic time-zone meter circuit. This relay St
is also energized through the contact 31' when the
time~zone meter failsto act with certainty.
The stepping of the timedisc when the called
subscriber answers from position £8 to position
20 at lo-second intervals without in?uencing the
A grease cap-FB serves for lubrication of the
various hearings on the shaft W.
*In order that the space occupied .by the whole
arrangement may be made relatively small, the
base plate G is formed with cut out portions
through which the stepping wheels, the tariff
disc, the driving magnets and the sets of contact
used for the evaluation.
This is in particular
necessary when, in a network of connections, a
particular exchange can only be reached by pass
ing through a particular operator, and, for es
In the time-zone ,meter illustrated in Figures tablishinga connection to an operator’s station,
a smaller number of series of current impulses, 2
11 to 16, the stepping of the zone value is ef
for example, is required than for the determina
fected by means of a mechanical zone determin
, tion of the distant zone. For simplification‘ of
ing device.
the circuits for bringing the zone determining de
If three series of current impulses are neces
vice‘ into operation, contacts are controlled by 10
sary for determining the zone, then the zone de
termining device must be arranged so as to have the criterion carrier. As soon as the criterion
1000 different settings; A device is therefore carrier leaves its position of rest when the large
switching steps are effected by the toothed wheel
provided which will be referred to as the “crite
223, the movable stop 226 is released and rotates
rion carrier” which consists of a number of
springs project.
discs 2I3~<Figures ll and 12) mounted on a
sleeve H5. The discs are separated by distance
pieces 2M and are'?rmly pressed against a stop
on the sleeve by means of a nut 2l6. The sleeve
- H5 is connected to a toothed wheel 2l‘l from
20 which projects a pin_2|8 passing through holes
in the discs 2E3 and thus preventing them from
rotating relatively to the toothed wheel. The
toothed wheel 2lll is also connected by means
of pins M9 to a disc 220. A clock spring is ar
ranged between the toothed wheel 2i'll and the
disc 220 .and has one end ?xed to the disc 220
while the other end is hooked on to a pin 22i
which is arranged on the base plate 2M. The
plate 220 carries a further sleeve 222 on which
30 a toothed wheel 223 is ?xed. This toothed wheel
223 has 11 teeth while the toothed Wheel 2H,
has 121 teeth. The toothed wheel 223 can be
stepped by the pawl 224 of‘ a magnet not illus
trated in the drawings, while‘the toothed wheel
35 2!? can be stepped by another magnet not shown
in the drawings. The assembly constituted by
the toothed wheels 223 and 2H- and the discs
through a small angle so that the contact ow 15
is closed. The rods 2l9 which connect the disc
220 to the toothed wheel 2|‘! and the casing of
the clock spring are so arranged that in each po
sition of rest which occurs between twor large
steps of the criterion carrier, they may actuate a
contact which is not illustrated in’v the drawings.
This contact thus remains, after the displace
ment of the criterion carrier in large steps, in
the same position in. which it finds itself in the
normal position of the criterion carrier. It is only 25
when the criterion carrier is rotated by the
small step stepping e?ected through the toothed
wheel 2l'i and its associated electromagnet, by an
amount which is smaller than the angular dis
tance between two positions of rest, that the
pin 2i|9 releases the contact which moves into
its working position.
In order to prevent an undesired backward
rotation of the criterion carrier under the in?u- 1
ence of the clock spring during and after the
setting, a check pawl'may be provided which is v
in engagement with the teeth of the toothed
2 i3 is freely movable on a ?xed shaft 2i2 mount-' . wheel_2i'i.
For determining the tooth
length correspond
. ed in the base plate 2H and, in the normal posi
40 tion, is held by means of the clock spring 230.
The normal position is determined by a projec
tion 225 which abuts against a projection 22E
pivotally mounted von the base plate. As this as
sembly is displaceable on the shaft 2i2, it is
45 held against displacement by- a screw 22‘!- in
ing to the selected setting, a feeler member 32 is
This feeler can carry out two move
ments. By the ?rst movement, a disc 2i3 of the
criterion carrier is selected, that is to say, a
selection takes place from 10 groups each of 100
possible settings.) The second movement, which
serted in the free end of the shaft. A pointer takes place in a direction radial to the disc 2i3,
228 is also preferably connected to the ?xed shaft ' serves for establishing the length of the tooth
by means of the screw 221 so that the degree corresponding to a particular setting‘, selected
of displacement of the criterion carrier can be from the selected group of Y100. Aspecial guide
read off a scale arranged on the disc 229.
Each disc 2i3 has 121 teeth 3i. The teeth can
be of diiierent lengths and eight different lengths
are provided, each length corresponding to one
of the eight different zone values. The teeth are
milled over the whole circumference of the disc
while the lengths are'determined by stamping of
concentric circles in the upper surface of the
The teeth 3| of the disc 2i3 can be cut to the
required length by ‘means of a pair of nippers
or other similar tool.
As there are always sev
eral exactly similarly constructed time-zone me
is provided for making possible this two-fold
movement of the feeler member 32.
A vertical _
guide pin 34 on which is mounted a carrier 31
which can be moved downwards against the ac
tion ‘of a spring 38 issmounted in a bearing 33
?xed to the base plate 2| I. The forward end of 55
the carrier 31 is made hollow and is closed by a
screwed on cap 39. This ‘end of the carrier 31 is
also provided with a slot 40 which passes right
through it and through which passes the feeler
32. The carrier 31 is also surrounded by a pro_ 60
tecting shield 52 which is ?xed to the bearing 33
' and is slotted at 53 for the'passage of the feeler
32. The feeler 32 is formed with a bearing 4|
which slides in the hollow part of the carrier 31 A65
and is under the in?uence of a spring 42. The
ters in an exchange, it is only necessary to carry
out this work by hand on the disc ‘of one of
them- This disc can then be used as atemplate
for all the other devices which are milled in a
‘feeler 32 can thus move longitudinally relatively
simple manner as a bunch.
to the carrier 31 with the carrier in a direction
In this way, an
exact matching of the discs of all devices isob
tained so that the testing need only extend to
a single device.
at right angles to that longitudinal direction.‘
For stepping the feeler along the carrier 31, 70
a rack 43 is provided on which there isa pin 44
The provision of 121 teeth on each disc which‘
is advantageous for the stepping of the criterion which lies in the forked end 45 ‘of the feeler 32.
- The stepping pawl of an electromagnet which‘ is
tage that the position of rest between the large not illustrated can engage with the rack 43. The -
carrier in large and small steps has the advan
step stepping and the small step stepping can be
upper-part of the rack 43 has teeth 46 in which 75
a check pawl 41 which is pivotally mounted on
the pin 48 on the bearing 33 can engage. _
scribed, the tariff device-is directly and mechan- ‘
ically controlled by means of the zone determin
The rack 43 is provided’ at its right hand ‘end ing device. For this purpose, two pins 63 and
with a projection ‘49 forming a stop which, in 64 are provided on the projection 51 of the car
the normal position of the rack, holds a contact . rier 31 which are under the in?uence of springs 5
nw open. when the rack makes its ?rst step
under the action of the unillustrated electromag
net, this contact nw is closed. The stop 49 also
has resilient switch arms 58' ?xed to it which, on
10 movement of the rack, wipe over the contacts of
a stationary contact bank 5| ?xed'in a suitable
manner to the base plate 2“. In this way, a
special circuit can be closed‘ at each step made
by the rack 43. This arrangement for closing
15 various circuits plays no part in the operation oi.’
-65. Each of these pins 63 and 64 has a disc 66
or '61 ?xed to move with it. The armature 66
of an unillustrated electromagnet moves in front
of these discs and in each of its positions holds
one.of the discs 66, 61 back against the action of 10
a spring 65 so that at any time only one pin 63
or 64 can project. In Figure 12, the armature
68 lies in front of the disc 61 and, consequently,
holds back the pin 64. The pin 63, on the other
hand, is free and bears against a meter stepping 15
ticular setting of the criterion carrier.
the device for estimating the value of a par
device 69 which is constructed as a storing wheel,’
. The wheel 69 is freely mounted on’ the shaft
"I‘he setting of the feeler 32 is thus effected" by
stepping the rack 43 which carries the feeler with
it. As therack and feeler move to the right,
provided with a spring housing‘ 16 which is ?xed
on the shaft H2. The spring in this/housing 20
. the compression spring 42 is energized and the
return movement is prevented by the check pawl
41 which engagesin the teeth of the rack 46.
The ?rst step brings the feeler 32 above the ex
2l2 which traverses the base plate 2".
It is
tends to rotate the storing wheel 69 in the di
rection indicated by the arrow in Figure 13 but
‘such rotation is prevented by the check pawl 12
which is resiliently pressed into engagement with
treme left hand disc l3, the‘carrier 31 remaining the teeth 1! formed in the periphery of the stor 25
ing wheel. A pin 13 is also provided on the stor
The radial movement of the'feeler 32 is ef
ing wheel 69 which, in the normal position, bears
fected through a' projection 54 from the carrier
against a movable stop 14 mounted on' the base
plate and holds this‘st'op against the action of
at rest.
31 against which bears the armature 55 of an
unlllustrated electromagnet. When this electro
a spring 15. The projection 14‘acts on a contact 30
_ magnetis energized, the carrier 31 and the feeler 90 which is reversed when the storing wheel 61
32 are pressed downwards so that the lower end " reaches its normal position. ~An electromagnet
of the feeler moves downwards towards the cri
terion carrier. This downward movement con
Wtinues until the feeler encounters a resistance,
that is to say, until it abuts on the head of the
tooth 3| (the length of which depends upon the
unit‘ of value) of the'selected disc 213 of the ori
TM is also provided which, by means of the step
ping pawl 16 which engages in the teeth 1| of
the storing ‘wheel 69, rotates the wheel 69
against the action of the clock spring in the cas
There is a radial slot 11 in the ‘storing wheel
69 which, in the normal position of the storing
wheel, lies in front of the pins’63 and 64 onthe 40
sponds'to the particular unit of value. As is _ carrier 31. This slot does not reach quite as far
clear from the drawings, in the normal position, as the circumference of the storing wheel so
the forked projection of the feeler 32 lies on the that, in the normal position of the carrier 31,
upper surface of the shield 52 so that the feeler the upper pin 63 cannot engage in the slot. If, 7
cannot return into that position before the se
however, the carrier 31 is depressed,‘ then vthe pin 45
‘ lectlng movement is carried out.v
63 comes in front vof the opening of the slot 11
The carrier 31 projects through a slot 56 in and engages in the slot unless prevented from
the base plate 2| I and on the far side of the base doing so by the armature 68. vA number of con
plate‘ has a projection 51 which is connected to a._ centric rows of holes 18 are provided in the stor
50 rack 58 (Figure 13). A check pawl 53 ?xed on ing wheel 69, each of which corresponds to a par‘ 50.
‘the base plate 2| I engages in this rack 58 and ticular value determined by the height of the car
The length of this engaging
40 movement of the feeler member 32 thus correé
- terion
prevents the carrier 31 from being lifted by the
spring 38. The pitch of the teeth of this rack 58
corresponds exactly to the units of the value to
be determined so that it is not: necessary for the
length of the various te“eth_ in the discs 2l3 to. be
absolutely accurate as long as it is within the
limits of the length corresponding to a unit ‘of
value. ‘The correct position of the carrier 31 is,
angular distance between two neighbouring holes
in a row corresponds to a particular unit of value. 55
For example, for seven different zone values cor
responding to the selector setting, with the de
scribed arrangement, 14 di?'erent rows of holes
are provided.
The ?rst seven of these rows of
indeed, always determined by the engagement of holes correspond to the seven tariffs for the dif 60
the pawl 59 in therack 58. The rack could, nat
urally', be ?xed and the‘ check pawl be arranged»
on the projection 51'.
A bent; rod 60' carrying an indicator 6| is
?xed to the projection 51. This indicator 6|
moves over a scale 62 on the base plate 2“ so
that the determined value can be read off di
rectly. Instead of or 'in addition to a scale and
a pointer, a contact arm and as many ?xed con
tacts as there are units‘ of value couldbe pro
In that case, a-circuit would at any time
be closed corresponding to the ascertained value
through which a tariff device can be electrically
rier 31. The holes in these rows 18 are spaced
at various angles over the ‘storing wheel 69. The >
In the example of construction now being de-_
ferent zones.
The second seven rows of holes
are for the purpose of enabling a switching over
to a different tari?? to be effected at particular
times, for example, so that at night calls are
charged at a cheaper rate. The ?rst seven rows 65
of holes are selected-by the pin 63 while the sec
ond seven rows of holes are selected by the pin
64. The switching over to the alternative tari?'
is effected by putting the pin 63 into action and
the pin 64 out of action or vice-versa through 70
energization or de-energization of the unlllus
trated electromagnet controlling the arma
ture 68.
The series of holes in the storing wheel 68 are
?xed once and for all when- the tari? is ?xed. 75
Q,099,6 16
,In order to make an alteration of the tariff de
vice easy when the tariff is altered, these rows
the member 89. The time disc ‘I9 is stepped at
equal intervals of time, 5 seconds for example, by
means of the electromagnet ZM. The arrange
ment of the cam 85 on the periphery of the wheel
‘l9 thus determines the instant at which a stor
which is changed when the tariff is altered;
A time disc 19 having a’ spring housing 89' is ing of the charge that is to be made according
rotatably mounted on the shaft 2 I2. The spring to the existing tari? is to be effected by means
in this housing 89 urges the time disc 19 into its of a rotation of the storing wheel. This occurs,
for example, after the ?rst 15 seconds after the
normal position in which a pin 8! (Figure 12)
setting into operation of the wheel 19, again after 10
on this disc bears against a projection H9 con
nected to the stationary shaft. The ‘time disc I the expiration of the ?rst three minutes and then
19 has teeth round its circumference in which again after the expiration of every subsequent
a check pawl 82 can engage. ‘An electromagnet minute up to a maximum of 12 minutes.
At each of these instants, the storing wheel
ZM is also provided, the stepping pawl 89 of
which allows the disc 19 to be stepped against 69 is released and‘ is then rotated through the 15
the action of the spring in the housing 88. The angular distance between‘ the holes of the selected
stepping pawl 88 has a pin 84 which bears on a row. vIt can quite clearly be seen that in this
projection from the storing wheel check pawl ‘l2 way any desired graduation of a tariff can be
so that at each attraction of the electromagnet obtained in that, for example, by means of the
release after the ?rst 15 seconds, a stepping takes 20
ZM, this check pawl is lifted out of the teeth ‘H
of the storing wheel 69. The time disc 19 is also place to a particular extent and by means of the
provided with switch cams 86 at particular in-' release after each following minute, a stepping
takes place through a smaller amount which can
tervals on one side which act on a'cam 86 on
constantly increase.
a member 89 arranged for movement along a
In order to indicate‘to the subscriber the in 25
stationary shaft 811 against the action of a spring
stant of time at which the charge storing opera
88. When one of the cams 85 moves past the
cam 86, the member 89 is displaced towards the tion for the call is undertaken, cams 94 are
base plate for a short time. This member 89 has provided on the time disc 19 at the same intervals
of holes are preferably stamped out of a disc of
sheet steel ?xed to the storing wheel 69 and
a slotted part 99 which engages over a fixed pin ‘
30 9| (Figure 16) ‘and which lies in front of the
pins 63, B4 of the carrier 31 and limits the mové-'
' ment of these pins under the action of their
springs 65. When the member 89 returns into
the position shown in Figure v12, the effective
35 pin 69 is drawn away from the storing wheel 69.
However, before the pin 63 leaves the‘slot ‘ill
in the storing wheel, a check pawl 93, which is
visible in Figures 13 and 16, is released by a pro
jection '92 (Figure 16) of the member 99 and
40 engages in the teeth ‘ll of the storing wheel 69.
This check pawl 93' is'so arranged that its edge
is dlsplaced relatively to the forward edge of ‘the
slot ll by half a pitch of the teeth ‘ll.
as the earns 85 which can actuate contacts
through which, for example, the circuit for a 30
buzzing signal is closed. These cams 94 are set
at a small angular distance in advance of the cams
85 so' that on the periodical stepping of the
time disc 19 by means of the electromagnet ZM,
a cam 94 actuates a stationary contact about 10
seconds earlier than the next cam 85 comes into
engagement withthe cam 86 on the member 89 for
the purpose of releasing the storing wheel 69.
A further cam 95 is provided on the time disc
‘#9 which has a somewhat greater length than 40
the cam 94. ‘After. a complete rotation of the
time disc '39 which takes 12 minutes, this cam
actuates a special contact not illustrated in the
the member 89 makes its returnlmovement, the - drawings through which, for example, the con
45 pawl 93 will thus ?rst of all engage in the teeth
so that the pin 69 is removed from the slot 'l'l.
As the return movement of the member 89 under
nection can be positively broken.
' An indicator 911 is also ?xed on the shaft M2 by
means of a screw 96 and a scale is arranged onv
the time disc ‘E9 in suitable fashion‘so that the
takes place at the instant of energization of the duration of the call can be read directly at any
time by the degree of displacement of the time 50
58. magnet AM which steps the disc ‘E9, the ‘storing
‘wheel check pawl ‘i2 is lifted at‘ this instant. disc 19.
It is clear that the zone. in-which the called .
Thus, when thepin 63 comes out of the slot ill.
the storing wheel “69 is released and, under the . subscriber’s exchange is situated is ?rst of all as
action of the spring in the, housing ‘l8, moves certained by displacement of the feeler 32 along
the actionof a cam 85 on the cam 86 always
55 in the direction of the arrow through half a pitch
of the teeth 'li whereupon the movement is
stopped by the check pawl ‘l8.
' The movement of the member 89 only takes
place for a short time.
As soon as the cam 86
66 is again free, the member 89 is moved forward
the carrier 31 and by rotation of - the criterion 65
carrier in large and small steps,_and that the
value of this zone is then obtained by lowering the
feeler. ' This value is represented by the height
of the pins 83, 64 connected to the carrier 31 and
can be read off the scale 62. It is also clear that
a storing of values will be carried out by rota
tion of the storing wheels 69 in accordance with
under the action of the spring 88. In this Way,
the pin 69 is ?rst-of all released and bears
against the storing wheel under the action of
' the various intervals of time. ‘.This rotation takes
its spring 65 and thus can no longer engage in
65 the slot ll because the latter is displaced by half
a tooth pitch. On the occurrence of the further
place through an angular amount which is deter
mined by the distance between the holes of the
series of holes selected by the height of the ef-‘
fective pin. At the end of the connection, meter- ‘
forward movement of the member 89, the projec
tion 92 is removed from. beneath the check pawl ing current ‘impulses, the number of which is
93 and lifts the latter. The storing wheel 69 is , dependent upon the charge amount that has been
70 now again released and rotates until the pin 63 stored, have to be sent to the calling subscriber’s 70
remains in this position until the next cam 95
For'this purpose, pins 98 are arranged
on the stnring wheel 69 at equal distances from '
each other which can workv a contact g (Figure
13) . The number of pins in this ring is a multi
of the time disc la-ab/uts against the cam 86 on;
ple of the number of teeth ‘II on the storing wheel
engages in the next hole of the series of holes
selected by the height of the pin 63 in accordance
with the ascertained value. The storing wheel 69 '
~ meter.
a. Thisisementialinorderthatvarlouscharges
may be rounded oil. For example, if the night
._ ‘charge is only‘ twofthirds of the day charge, then
‘the angular distance betweentheholu oi the
innermost seven rows of holes wiped over by the
pin 84 must be exactly two-think of the outer
seven rows oi holes wiped over by the pin 63.
In. this way, it can be obtained that although
from instant to instant a further rotation of
the storing wheel ‘I takes place, no raising of the
charge takes place. If the number oi'pins is a
multiple oi’ the number of teeth ‘II, then the
storing wheel can he stepped through one or more
teeth without causing a new pin .8 to one under
the contact 17.,
The production of the metering current im
pulses by wiping oi the ‘pins '8 overthe rollers
99 (Figure 13) controlling the contacteg has the
advantage that the emission of current impulses
20 is eiiected with absolute accuracy and exactness,
After this return movement of the pins 0, 64,
a projection ill of the cam I02 removes the
check pawl I! out of the rack it so that the car
rier 31 is lifted under the action of the spring
N and separates the feeler 32 from the criterion
On further rotation of the shaft I ill, a cam
Ill removes the check pawl 41 out of the rack
I It so that the ieeler 32 returns into the normal
position under the action of the spring 42 in 10
which po?ticn the contact m0 is actuated by the
projection 48. . When this movement occurs, the
lower end of a pin H2 ?xed to the rack 46 en
gages under the check pawl on the criterion car
rier which has already been mentioned and which
is not shown in the drawings and which is in'
engagement with the toothed wheel 2". The
check pawl is thus displaced‘ and the criterion
carrier is consequently released and rotates un
der the in?uence of the clock spring ?xed to the 20
no distortion 'in the
on occurring as plate 120 until its projection 225 abuts against
may occur when the tra
is eiiected by the movable stop 226, that is to say, until the '
means of relays. Also, in this way, the sending normal position is reached. - In this position the
of the meter current impulses is concluded by
the time the wheel 6! has returned intojgnormal
if thebymeter
a contact itseli con
trolled by the electromagnet' which effects the
step by step return movement ‘of the storing
30 wheel 88, it might easily happen that this electro
magnet is not de-energised on reaching the nor
mal position of the storing wheel 60, and, there
fore, sends out iurther current impulses.
The electromagnet TM, the check pawl, 16 of
which engages the teeth ‘II, is, as already men
contacts w and ow are again reversed.
By means of the return of the carrier member 25
I‘! intoits normal position, a rod H3 connected
to the check pawl 82 and the free end of which
lies on the upper edge oi the rack BI, is lifted so
that the check pawl 82 is brought out of engage
ment with the time disc .18 and this disc, also 30'
under the in?uence oi the clock spring arranged
in the spring housing 80, is returned into its
normal position determined by.the stop 8i.
_ The energization oi.‘ the electromagnet AM also
6!. In order that the storing wheel '0 may be
rotated, the pin '8 or N which has been opera
has the result that 'thewhole of the hitherto dis
placed parts are returned with the storing wheel
69 into their normal positions. It is only this
storing wheel which is held in the displaced posi
‘tiveuntilthenhastobelittedoutoithe selected
tion by the check pawl I08 and the check pawl
tioned, provided for returning the storing wheel
40 series of holes. For this purpose, when the super
12. The electromagnet AM remains energized
visionvoi the connection is ended, an electromag
net AM (Figure 16) is energised, the" armature
of which has a_ projection Ill by means of which»
for the whole duration of ‘the return movement.
Thus, by means of the contact a, current impulses
are sent out until the projection ‘ll of the storing
the actuation of a contact ms and various me
wheel abuts against the movable stop 14 whereby
chanical controlling steps are elected. 'l‘he'de
vice necessary for this purpose is illustrated in
detail’ in Figure 16. It consists‘eaentially of a
shaft ill rotatably mounted in the base plate
2“ and on which the variousswitchingcamsare
?xed. A spring Ill engages with the switching
cam II! and tends to hold the shaft ill always
in a particular normal position. A pin III is
the-contact go is opened which causes the ener
gization circuit of the electromagnets AM and
TM to be broken.
' As already described, in this example of con
struction, the value of the call is determined by
means 01' a downward movement of the carrier 50
31. It may, however, be necessary that no mul- 1
tiple metering should take place in the ?rst
?xed on the switch cam I“ and lies between two ' evalution so that on the determination of only a
pins I06 oi‘ the armature Ill ‘so that on energira
55 tion of the electromagnet All, the shaft III is
rotated against the action of the spring ill.
small value, the storing wheel 89' and the time
wheel ‘I! remain in their normal position. In 5s,
order to obtain a positive dependence for this
purpose, contacts em?, eml, em2 (Figure 12) are
closed by the member ill which is connected to
the carrier member 31. The contact emll is closed
when the carrier member is lowered through one
step, the contact emi when the carrier member is
lowered through two stepsfwhile the contact
On the occurrence of this rotary movement, a
check pawl I“ is ?rst 0! all released by a pro
jection "l1 0! the cam I“ and engages in the
storing wheel teeth II. This check pawl III is
so arranged that its-position of
cut reg
isters with the holes in the rows of holes, and
thus is not displaced through half a tooth pitch em! is only closed when the carrier member is
relatively to the running edge of these holes as lowered through at least three steps. ‘For ex
65 was the above mentioned check pawl II. By
ample, the circuit for the stepping magnet ZM
the engagement of the check pawl III, the posi
oi’ the time disc 19 is ?rst of all closed by this
tion taken up by. the storing wheel ‘I is main
contact emZ so that thus a multiple metering
tained independently of the pins 83, '4.
can only take place in dependence upon the time
On further rotation of the shaft‘ III, the and the established value when the product is
70 oblique projection of a cam ll! abuts against the ' at least 3. The contact emljcan, for example, 70
member I! and p
this member towards'the effect a metering by one step which is appro
_ base plate so that the pin 03 or N is, in the al-' priate ‘for local calls while other switching func
ready described manner. brought out of engage
tions can be carried out through the contact
ment with the sel
series oi! holes in the emll.
76 storing wheel ‘9.
If special contacts are to be closed in depend 75
ence upon the rotation of the discs of the cri
terion carrier through large and small steps,
then fixed contacts lid are arranged on the cir
cumference' of the criterion carrier (Figure 15)
which can be actuated by
carrier. In their simplest
formed by stampings out
is inserted in one of the
cams of the criterion
form, these cams are
of a sheet H5 which
slits in the 'discs M3
and is connected in suitable fashion, by bending
10 for example, to the last of these discs.
In this
way, it is possible to close circuits in particular
_‘OSltl0l’iS of the criterion carrier.
By connecting the contacts, 5! which, on dis
placement of the feeler 32, are wiped over by the
.15 arm 50, to the contacts I M, it is possible, for each
of the 1000 possible settings, to actuate the cir
cuits corresponding to the setting of three selec
tors of the trunking scheme. This may be neces
sary in order, for example, to re-route the con
20 nection made by a. subscriber over'a simpler and
shorter path. '
The arrangement of the whole of the moving
parts of the described time-zone meter on one
side of a stationary base plate 2!! has the ad
'25 vantage that these parts are easily accessible and
that the degree of displacement of the individ
ual parts is visible.
The supply of current to the various electro
magnets and mechanically controlled contacts is‘
30 effected through a contact strip H6 (?gure 12)
which is arranged at the base in of the base
plate 2H. The contacts MB of this strip H8
merit of said meter stepping device and said
meter stepping device being provided with means
for limiting its such movement to an extent de
termined by the ascertained zone value and by
the time interval at that moment; the last named Ca
means'being arranged'in" several groups, each
group corresponding to a zone value and the
means within each of said groups corresponding
to a different interval of time.
4. A device for time and zone metering in tele 10
phone installations, comprising means for ascer
taining the zone value of a connection, a time
switch device constructed as a rotary disc and
a meter stepping device, the disc of said time
switch device being provided with cams arranged 15
‘at’ particular angular distances for the produc
tion of energizations'for stepping the meter step
pingmechanism at intervals of time and said
meter stepping mechanism‘ being provided with
several groups of means, each group correspond 20
ing to a zone value and each means within one
of said groups corresponding to a different inter- Y
val of time, said means being adapted to limit
the stepping of said meter stepping device to an
extent determined by the ascertained zone value 25
and by the actual interval of time. ‘
, ‘
5. A device for time and zone metering in tele
phone installations with calling and called sub
scribers, comprising means for ascertaining the _
zone value of a connection, a time switch device, 30
a movable meter stepping device,‘ means asso
/ciated with said time switch device for closing
are made, in lmown fashion, as pins so that it ’ energizing circuits for starting a- movement of
said meter stepping device at intervals of time
the arrangement l H is ?xed to a. frame, an elec
corresponding to the unit periods of conversa 35
35 gtrical connection can be‘ made without diiiiculty
tion, means associated with said time switch de
with the contact springs of a corresponding oppo
site strip. In this way, easy interchangeability vice for signalling the calling subscriber, said
meter stepping device being provided with means
of‘ the described device is obtained.
adapted to limit the movement thereof to an ex
We claim:—
1. A device for time and zone metering in tele-i tent determined by the ascertained zone value 40
and’by the time ‘interval at that moment; the
phone systems, comprising means for ascertain
ing the zone value of a connection, a time switch last named .means being arranged in several
device and a movable meter stepping device, said groups, each group corresponding to a zone value
time switch device being adapted at intervals of and the means within each of said groups corre
sponding to a ‘di?‘erent interval of time.
' time corresponding to the unit periods of con6. A, device for time and zone metering in
versation to start‘a movement. of said meter step
telephone installations, comprising means for
ping device, and said 'ineteEstepping device be
ing provided with means adapted to limit the - ascertaining the zone value of a connection, a
time switch device, a movable meterwstepping de- _
movement thereof to an extent determined by
vice, means associated with said time switch de
50 the ascertained zone value and by’tlie time inter- _
val at that moment; the last named means being vice for starting a movement of said meter step
ping device and means associated with said time
arranged in several groups, each group corre
sponding to a‘ zone value and the means within switchvdevice for signaling the calling subscriber
each of said groups corresponding to a di?erent and means for limiting the movement of said
meter stepping device to an extent determined
55 interval or time.
2. A device for‘time' and zonemetering in tele
phone systems, comprising means for ascertain
ing the zone value of a connection, a time switch
by the ascertained zone value, said signaling
means being arranged so as to be actuated be
fore- actuation of said means for starting a
device and a meter stepping 'device, said time
switch device being adapted to produce energi
movement of said meter stepping device.
zations at intervals‘ of time for stepping, said
metenstepping device, and said meter stepping
device being constructed as a‘rotary disc, said disc .
being provided with means arranged in several‘
concentric’ rows corresponding to the number of
zone values and adapted to limit the rotation of
phone installations with calling and called sub
' said disc to an angle determined by the ascer
tained zone value.
3. A device for time and zone metering in tele
70 phone installations, comprising means for ascer
taining the zone value of a connection, a time
7 switch device and a movable meter stepping de
vice, said time switch device being, provided with
means for at intervals of time corresponding to
75 the unit periods of conversation starting a move
7. A‘ device for time and zone metering in tele
scribers, comprising means for ascertaining the
zone value of a connection between a calling and
a called subscriber, a movable'meter stepping de
vice and a time switch device, said time switch
device being provided with means for starting a
movement of said meter stepping device, with
means for signaling. the calling subscriber and
with means for cutting off the connection at the
expirationof a particular period of time when
the called subscriber fails to’ reply, and said meter
stepping device being provided with means for
limiting its movement to an extent determined
by the ascertained zone value and by the actual
interval of time.
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