DE284180C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

, .- Jüi 284180 - ■ CLASS 21 a. GROUP

rrtit call distribution. -t-

Patented in the German Empire on September 14, 1913.

The invention relates to circuit arrangements for semi-automatic telephone systems with Call distribution in which the female officers' seats are connected by ring lines Groups are arranged. The peculiarity of the invention is that the Switching devices of each office group, which allow the setting of service voters on waiting contacts when all officers are occupied

ίο and their expiry when they become free cause of a civil servant are connected to each other by a ring line. Through this it is achieved that when one station or a unit is switched off, several Service stations the associated switching unit or the waiting device of the service voter group depends on the corresponding positions of other groups.

Two exemplary embodiments of the invention are shown in the drawing.

For the three service voter groups DPF] to DW ₁ , DWh to DWj ₁ , DWih to DW ₁₁₁ and the associated office groups P ₁ to P ₁₀ , P ₁₁ to P ₂₀ , P21 to P ₃₀ (of which only two in each Group are shown) are drawn in each case only the test contact set together with the associated test contact arm, while the associated speech lines and contact sets, which have nothing to do with the invention and are designed in the usual way, have been omitted for the sake of simplicity. Likewise, the switching device for the service selectors has been omitted and only the test relay T connected to the test wire c is indicated for some of the service selectors.

The contact sets of a group of service voters are switched in multiple ways, namely, as the drawing shows, interlaced. There are always different contacts of the different service voters with one and the same line C ₁ ', ca, C ₃ ' ... connected. Therefore, several service voters who start from the same contact arm position at the same time can still touch different connection lines in the same moments. The last contact 0 of each service voter is designed as a waiting contact. The waiting contacts of a service voter group are connected to a common line β and can be connected to potential by a normally closed contact u of a relay U.

When a potential waiting contact is touched, the test relays of the service voters can respond and cause the relevant voter arms to be shut down. Each relay U ₁ . . . keeps his contact κ / when he is excited. . . opened so that the associated line e is disconnected from earth. The relays Ui. . . are excited as long as f /. . . through one of the working contacts gi ■ ■ ■ from each office • assigned relay Gi. . . (The mode of operation of the relay G is given below) Earth potential is applied. .

Two voter setting devices (keyboards T ₁ , T ₂ ...) Are allocated to each service voter position P ₁ , P _{2 ....} The assignment of the

Statures T ₁ ... takes place via contacts m _x
as soon as the officer has taken her seat and closed the microphone circuit. A relay R ₁ is parallel to each keyboard T _{1 ....} . . switched, which is excited with the assignment of the associated keyboard and a normally closed contact ^ ₁ ... opens. The corresponding office places P ₁ , P ₁₁ , P ₂₁ ; P ₂ , P ₁₂ . . . of the various groups I, II, III are connected to one another by ring lines h, i , which are closed by the drop in microphone contacts Ot ₁ ... On the one hand, the feed lines coming from the service voter contacts and, on the other hand, the mating contacts of the microphone contacts of the corresponding office of the preceding group are connected to the pivot points of the microphone contacts. The relays G ₁ , G ₂ ... of the corresponding office positions P ₁ , P ₁₁ , P ₂₁ ; P ₂ , P _12, P ₂₂ .. are on common lines k . . . These are m'l at every office via a microphone idle contact. . . mi'i ... out which, when the office station is switched on, applies the line k to ground potential via the normally closed contacts connected in parallel (e.g. r _v r _{2 of} the relays R ₁ , R ₂ at the station P _1). When the office stations are switched off, their associated microphone contacts m ", m'l ... establish the connection with the continuation of the relevant line k . ...

The switching processes in the distribution of calls to the office positions play out as follows:

If a subscriber takes his handset off the hook to call the office, it will his station is connected to a service selector via selection. This service voter will caused to start until its test arm comes to an unoccupied contact.

His test relay T responds and initiates the shutdown of the voter on the line concerned.

It is initially assumed that female officials are involved in all official posts.

Then all microphone contacts m _{x are turned over} . This means that all connecting lines h, i, k. . . between the individual offices -. pruppen I, II, III interrupted. A service - selector DW is therefore only capable of connections

(e.g. the service selector DW \ via c [, el or: c ₃ 'or c [ ...) with the keyboards T ₁ , T ₂ . ... ■ to establish the corresponding exchange group I. The keyboards T ₁ . . . the office positions should still be unoccupied. If, for example, the service selector DW] is prompted to start up by a call, his test relay P responds at the first step via earth, T, c, ei W ₁ , T ₁ , battery, earth . The service selector DWi is shut down. The relay Ji _1, which is connected in parallel, also responds and opens its normally closed contact r _v In the same way is then the assignment of the keyboard T ₂ of the same place P ₁ by a different service selector on.

The relay G _{1 of} the place P ₁ responds to earth, r ₂ , m'l, G ₁ , battery, earth. The relay G ₁ keeps its normally open contact ^ ₁ closed. If both keyboards T ₁ , T _{2 of} a location P _{1 are} occupied, the two relays R ₁ , R ₂ connected in parallel with the keyboards are energized, their normally closed contacts P ₁ , r _{2 are} interrupted, the circuit of relay G _{1 is} open and the earth is connected switched off at contact ^ ₁ from line / 7.

If all the places in a group (e.g. I) have been occupied in this way, the relevant control relay Ui is de-energized because its feed line fi no longer has ground potential. Its contact uj therefore applies potential to the line ei.

Now runs at one of the service selectors, z. B. · · DWj, despite the fact that all keyboards of the corresponding office group are occupied, the service selector DW) rotates until its test arm touches the waiting contact 0. (Several duty selectors can therefore run on waiting contacts 0. ) Then the test relay T switches off the rotary magnet of the duty selector DW \ through its excitation via earth, T, c, test arm ei, ui, battery, earth. If a keyboard of this place group, z. B. T ₁ free, the relay R _{1 is} de-energized and its contact Y ₁ closes. As a result, the relay G ₁ receives power, responds and connects the line fi to earth via its contact gi. The relay Ui receives power, opens his. Contact uj so that all waiting contacts 0 der

Service selector DW \ of the same location group

be shut off from the earth. The test relay T of the duty voter DWj who has accrued the waiting contact is de-energized and thereby causes the relevant rotary magnet to be switched on. This switches his service selector on until a test arm hits the feed line C ₁ 'of the keyboard T ₁ that has become free again. The test relay T of the service selector DW) responds again. If the test arms of several service selectors DW) ... of an office group are on their waiting contacts and several keyboards of this group are free, the test magnets T of the voters on the waiting contacts 0 are de-energized by the grounding of the relay Uq - and cause the latter to call in the manner indicated above. As a result of the above-mentioned ei entanglement of the keyboards T ... ₁ lines carrying C ₁ ', el ... can remain standing on the same supply line never -two voters.

Is only one office group, e.g. B. the the

Group I, switched on, the microphone contacts m are only turned at the places in this group; however, the ring lines h, i, k are in the places of all other groups. .. closed. The keyboards T ₁ .... made available to group I also to service voters of group II, III ...; z. B. the service selector DWm of group III can use the keyboard T ₁ of group I.

ίο assign a call by his isolating relay T via earth, T, test arm, c '[', m ₂₁ , in _iv M ₁ , T ₁ , (R ₁ ), battery, earth -is excited and the shutdown of the selector DWm on the line c'i '.

As long as keyboards are still free in the activated group I, any of the contacts g is located . (as described above) Earth on line / 7. The relay Ui is energized and switches off the battery from the supply line 0 / to the waiting contacts 0 of service dialer group I. Since the common ring lines of relay G are nowhere interrupted outside of group I (apart from contacts ml... ), The corresponding relays G ₁₁ , G _{21 of} all other groups are also energized in parallel with relay G _{1 of group I} . The relay G ₁₁ causes the excitation of the relay Un of group II by closing its contact gn , the relay G ₂₁ by closing its contact gm the excitation of the relay Um of group III and so on.

In all groups, the waiting contacts are switched off from potential as long as as in the activated group I still keypads free and therefore relay G energized are. The relays G are only activated when all the keyboards of the activated group I are occupied this and the other groups II, III. . .

de-energized and thus also all relays U "de-energized and switched on by the closure of all rest contacts u the waiting contacts of all service voter groups.

If the two groups I and III are now switched on, then, as after Above can be seen, the calls from the service selector group II the keyboards of the Place group I, · the keyboards of place group III but only those in the service voter group III record incoming calls.

If there are more than three place groups, the resulting unevenness of the distribution according to FIG. 2 can be eliminated by connecting the office place groups to one another in groups by special ring lines intended for these groups. For example, service voter groups I and III are interconnected by a ring line y and service dialer groups II and IV are interconnected by a ring line ζ. All calls from service dialer groups I and II, but all calls from service station groups IH and IV will therefore flow to office group I and office group III. If, for example, the I. seat group is no longer sufficient with increasing traffic, the connected seat group III is added. On the other hand, if seat group II is no longer sufficient, the fourth seat group is switched on.

Claims (6)

Patent Claims: 1. Circuit arrangement for semi-automatically operated telephone systems with call distribution, in which the officers' seats in groups connected by ■ ring lines. are arranged, characterized in that the switching devices (relay G) of each office group, which cause the setting of service voters (DW) ...) to .Wartekontakte (0) and their re-expiry when an officer becomes vacant, through each other a ring line (k ...) are connected. 2. Circuit arrangement according to Claim 1, characterized in that the ring lines (k ...) Connecting the switching devices (relay G) are parallel to the ring lines (Ji, i ...) Connecting the test wires to one another. 3. Circuit arrangement according to Claimi , characterized in that the ring lines (k ...) Connecting the switching devices (g) are subdivided by interruption contacts (m'l.) At the offices. 4. Circuit arrangement according to claim 1 1 °° to 3, characterized by such a mutual connection of the 'office groups. (I, II, III) that when switching on all official station pruppen the waiting contacts (0) of the service selector (DW]...) of each group are already switched on when all officers of the group concerned are occupied and the service voters of a group are only expired from the waiting contacts when an officer of the group concerned becomes free. ■ 5. Circuit arrangement according to claim 1 to 3, characterized in that at the activation of a smaller number of office station groups the activation of the waiting contacts (0) for an office station group only when the officers are occupied by other groups and the service elector of one expires again Group already takes place in other groups when officers become vacant. 6 circuit arrangement according to claim ι and 5, characterized in that the place groups by groups for this Groups certain special ring lines are connected to one another (e.g. group I with III and II with IV), so that an even distribution of service voter groups among those already activated Office groups takes place. For this purpose ι sheet of drawings.