DE437334C - Circuit arrangement for making connections of various values in telephone systems with dialer operation - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
November 23, 1926

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21a ³ GROUP

(S 63176 Vlllfiia?)

Siemens & Halske Akt-Ges. in Berlin-Siemensstadt *).

Circuit arrangement "for the production of connections of different values in telephone systems with dialer operation.

Patented in the German Empire on June 17, 1923.

There are known circuit arrangements in which the certain connections Validity required testing equipment not the line selector, but one of them Voters are assigned to upstream connection level. The known arrangements can only be used for systems with individual lines, as the test equipment at the upstream connection level can only be switched on after the setting of the line selector has been completed.

The present invention is now aimed at systems with multiple connections to enable the application of an arrangement

*) The patent seeker stated as the inventor:

Alfred Scheimert in Charlottenburg.

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at which test facilities are used for connections of a certain value a connection stage upstream of the line selector take effect, which is what it is achieved that when establishing a connection of a certain valence, z. B. high-quality long-distance connection, to one Multiple connection switching means become effective, which are the setting elements of the line selector for the selection of a free line of the multiple connection under the influence of switching devices of an upstream connection stage bring.

The arrangement according to the invention also makes it possible, for example, that the setting members of the line selector for the purpose of making local calls in the known manner from this selector self-assigned facilities are mastered and only in the case of special operating connections, z. B. in the high-quality long-distance connections, those switchings made through which the adjusting members are placed under the influence of those upstream Connection stage are brought to which the switching means to carry out the particular, during manufacture and the existence of special operating connections arranged switching operations to be carried out are.

In the drawings, an embodiment of the invention is shown.

Fig. 1 shows schematically the arrangement of the selector for establishing local and long-distance connections in a telephone system. Local connections between the subscriber TIn ₁ and the multiple line MA are established by setting the following selectors:

First selection /. VW, second selection II. VW, first local group selector /. GWo, second local group voter II. GWo and line voter LW. If the multiple connection MA is requested from the remote office, the officer in the remote office FA plugs a free jack Kl using her plug Fst. A preselector I. FVW adjusts itself in a known manner to a free subordinate voter, namely to one that can only be used for long-distance connections first group voter I. GWf. This first remote group selector is set to a specific contact group by number current surges and is now looking for a free second remote group selector in this group, namely the group dialer pair II. GW fa and II. GWJb. Both group selectors are set at the same time. A free line selector LW is assigned via group selector II. GW fa. After setting the line selector, the II. GW fa is switched off and the II. GW fb is switched on. This is done by switching contacts, one of which is shown in Fig. 1 and designated _{M 1.} The final establishment of the long-distance connection as well as the speech itself takes place via the group selector II. GW fb .

First, consider the case that a local connection is to be established with the multiple connection and, due to the fact that all second group dialers II. GW 0 serving only local traffic, the local connection to be established must run via a remote group dialer 17. GW fa.

The individual switching operations are explained using Figs. 3 and 4.

After the group selector pair II. GW fα and II. GW fb has been assigned by an upstream first group selector, not shown, both group selectors II. GWfa and II. GW fb are set.

When a free line selector LW is found, the following test circuit is established: Earth, windings I and II of test relay P ₁ , contact 6 C ₁ , switching arm 7, contact 23, wire 24, control switch contact 25 (Fig. 4), position i, winding I. of relay C ₂ , battery, earth. The relay P ₁ stops the group selector pair, blocks the line selector found and switches the speech wires 9 and 11 to the contacts 27 P ₁ , 28 P ₁ via the normally closed contacts 29 Ji ₁ and 30 U ₁ , the wires 31 and 32, the switching arms 33 and 34, the contacts 35 and 36 to the wires 37 and 38 leading to the line selector LW , to which the bridge relays A ₂ and B _{2 are} connected via the control switch contacts 39 and 40 (Fig. 4) in positions 1 and 2 of the control switch , The line selector is set by the series of current impulses to be transmitted by the calling station. The control switch that is in position 2 to turn the line selector at the end of the series of impulses is moved to position 3 after control relay B ₂ has dropped out and from here to position 4. The first contact on the line selector assigned to a multiple subscriber is an empty contact. to which no line is connected. The control switch remains temporarily in position 4 since the relay U ₂ , which is equipped with delayed armature drop-out, was energized in position 3 via contact 59. A contact 54 mk is now provided on the line selector, which is closed as soon as the line selector is set to the empty contact of a multiple connection. This contact excites the relay ^: earth, contacts 51 ^ ₂ , g, multiple contact 54 mk, control switch

Contact io6 position 4, relay A ₂ , resistor 107, battery, earth. The relay A ₂ switches on the winding I of the delay relay U ₂ : earth, contacts 108 a ₂ , 109 b ₂ , winding I of the relay U ₂ , resistor 48, battery, earth. The relay U ₂ is therefore kept energized and the control switch initially remains in position 4. Furthermore, the relay A ₂ also closes its contact 53 a ₂ and

xo thereby switches on the rotary solenoid D ₃ : earth, contacts 51 />. ,, 52 g-, 53 a., control switch contact 55 position 4, rotary solenoid D ₃ , battery, earth.

The line selector is switched to the next line. At the same time, however, the magnet D ₃ by means of its contact UOd ₃ shorts the relay A, which drops out and interrupts the circuit for the rotary magnet D ₃ by opening the contact 53 a ₂ .

The rotary magnet D ₃ drops out, removes the short circuit around the winding I of the relay A ₂ , so that it can respond again and _{close the circuit for the rotary magnet D 3} again. This game is repeated until a free line to the selected multiple connection is found. In this case, the relay P ₂ responds prevented by interruption of the contact 51. p _2, the re-energization of the relay A ₂ and D ₃ of the rotary magnet and initiates the other, necessary for the completion of the \ ^r Getting Connected switching operations.

In the following, the switching operations that occur when establishing remote connections will now be explained. The remote officer (FA) introduces the plug F st (Fig. 2) into a free latch Kl , whereby the relay CF _{1 is} energized, which stimulates the preselector I. /. GW f sets. The first group selector LGWf, the second group selector II.GWfa, II.GWfb and the line selector LW are set one after the other by the series of current impulses to be transmitted by the officer. No line is connected to the first contact 220 of a multiple connection. This empty contact 220 is used to check whether there are still free lines to the multiple connection. Earth is connected to this contact as long as any line is still free. If all lines of the multiple connection are busy, the relays 65 I, 65 II etc. assigned to these lines are energized either in outgoing or incoming connections. _{The relay F 4 is} energized via the contacts 221/65 ', 232 / 65- ", etc., which separates V ₁ earth from the empty contact 220 by opening the contact 223.

When the control switch in the line selector reaches position 3 after the end of the impulse series for setting the line selector to the idle contact 220, the relay B ₂ is energized in the following circuit, since the battery is automatically connected to a wire by the impulse transmitter: Earth, Battery, impulse transmitter Nu in the official's cord circuit (Fig. 2), contacts 1121, 121 and 122, tip 123 of the plug Fst, latch spring 124, switch arm 125, contacts 126, 119 ^ ₃ , switch arm 127, contact 128, wire 129 to Fig. 3, wire 9, contacts 27 p _v . 29 U ₁ , wire 31, switching arm 33 of group selector II. GW fa, contact 35, wire 37 for Fig. 4, contact 130 g, control switch contact 131 position 3, winding I of relay B ₂ , earth. The relay B ₂ opens its contact 42 b “ and thereby prevents the control switch from being switched beyond position 3. In addition, the relay B ₂ energized a relay G in the following way: Earth. Contacts 132 b ₂ , 133/2) Control holder contact 134 position 3, relay G, battery, earth. Relay G responds, interrupts the excitation circuit for relay B ₂ at contact 130 g, which at the same time as switching on relay G has closed the following circuit: earth, winding I of relay B ₂ , control switch contact 131 and 135 position 3, contact 136 b ₂ , wire 137, contact 138 (Fig. 3) and switching arm 139 of group selector II. GW fb, contacts 140 p _v 14If ₁ , winding I of relay U ₁₁ battery, earth.

The relay G in the line selector has switched on its response via its contact 142 g in a holding circuit which remains closed in positions 3 to 5 of the control switch. In the second group selector, the relay U ₁ responds and turns on via its contact 144 .U ₁ in the following holding circuit: earth, contacts 143 C ₁ , 144Ii ₁ , winding II of relay U ₁ , battery, earth. Relay U ₁ switches on a delay _{relay F 1} : earth, contact 158 U ₁ , 1 59 X ₁ , relay V ₁ , battery, earth, which prepares the circuit of ReIaIsX ₁ at contact 160 V ₁ . Furthermore, the. Cores 31 and 32. and the switching arms 33 and 34 of the group selector II. GW fα from the incoming line by opening the contacts 29 U _x and 30 U ₁ and the incoming line via the contacts 145 M ₁ and 146 U ₁ to the Group selector II. GW fb switched. The test relay P ₁ , which is connected to the test arm 7 of the IL GW fα , is not disconnected and keeps the group selector set.

The connection to the desired participant is now established so far that the

Remote operator can complete the connection at any time. If this is to be done, the remote operator presses the test button PT (Fig. 2), thereby interrupting contacts 121 and 147, whereby earth at contact 148 is connected to a wire of the voice line. This creates the following circuit: Earth, contact 148 of the test button PT _3, contact 149 of the button TT, contact 150 of the plug Fst, pawl spring 151, switching arm 152, contacts 153 and 120 p, _it switching arm 154, contact 155, wire 156 to Fig. 3,

Cores, contacts 28 P ₁ , 146 BED

re

P _{1 1}

lais F ₁ , battery, earth. The relay F ₁ responds and interrupts the holding circuit for the relay B ₂ in the line selector via the wire 137, the switching arm 139 and the winding I of the relay U ₁ (Fig. 4). The relay B ₂ drops out and causes the control switch to be switched to position 4. Here it stops because the relay U ₂ , which has been energized in position 3, is equipped with a delayed armature drop-out. As a result of the excitation of relay F ₁ , ReIaIsX _{1 is} excited via its winding I via contact 161 Z _1. A preliminary check is now carried out to determine whether there are still free lines to the multiple connection. If this is the case, the relay O ₁ is excited via its winding I as follows: earth, battery, winding I of relay O ₁ , contacts 163 V ₁ , 162 X ₁ , 195 hr ₂ , switching arm 164, contact 200, line 201, switch arm 74 (Fig. 4), empty contact 220, contact 223 z / ₄ , earth. The relay O ₁ responds and opens the short circuit around its holding winding II at contact 226 O ₁ . At the same time, however, the following circuit is also closed: Earth, contact 327 X ₁ , windings II and III of relay X ₁ , winding II of relay O ₁ , contact 229 Hr ₁ , 196 hr ₂ , switching arm 205, contact 204, wire 203, contacts 230 «, (Fig. 4), 328 g ·, 54 mk, control switch contact 106 position 4, relay A ₂ , resistor 107, battery, earth. Relay A ₂ responds while relays X ₁ and O _{1 are} kept energized. The relay A ₂ closes its contact 53 a ₂ and thereby connects the rotary magnet D ₃ parallel to its own winding. However, due to the high-resistance winding II, this cannot respond to _{relay X 1 at first.} The relay A _{2 also} keeps the relay U ₂ energized by closing the contact 108 a ₂ , so that the control switch _{remains in position 4 (contact 60M 2} remains open). Since the relay O _{1 was} energized, the relay HR _{2 is switched} on to the test arm 139 via the contact 227 O ₁ . The test is now carried out on a free line.

If the delay relay V ₁ in the second group selector, whose circuit was _{interrupted when ReIaIsX 1 was} excited at contact 159 X ₁ , the high-resistance winding II of relay X _{1 is} short-circuited at contact 231 V _1. The rotary magnet D ₃ (Fig. 4) can now be excited by the earth connected via the contact 327 X ₁ (Fig. 3). The rotary magnet D ₃ switches the line selector to the next contact, short-circuits relay A ₂ at contact 110 d _s , which opens contact 53 a _2. The rotary magnet D ₃ falls off. This game is repeated until a free line is found, whereupon the relay HR ₂ responds, switches itself on via its winding II and the contacts 182 hr ₂ , 140 P ₁ and 183 hr ₂ in a holding circuit and at the same time through the The earth connected via contact 182 hr ₂ marks the line found as remote. It can happen that while searching for a free multiple connection line, the last free line is taken into use from the other side. If the line selector reaches the last line, the contact 54 mk is opened, with the result that the relays O ₁ and X ₁ drop out. The relay X ₁ acts as a delay relay due to the short circuit in winding II. As a result, contact 166 X ₁ remains closed for a short time after contact 165 O _{1 has been closed.} If the last line is occupied, relay HR ₂ cannot respond, only relay HR ₁ after contact 168 O _{1 has closed} . HR ₁ switches on a buzzer via its contact 180 Hr ₁ , through which the remote officer is made aware of the presence of the location. The interconnection of the speech wires for the purpose of notifying the speaking participants by the telecommunications officer takes place through the relay HR ₁ . The separation of the local connection and the final establishment of the long-distance connection takes place under the influence of the long-distance official. If, on the other hand, the last line of the multiple connection is remote, the relay HR ₁ cannot respond and the officer receives the remote busy signal _{via contact 174 Ar 1.}

If, when the line selector is set to the idle contact of the multiple connection, there are no free lines, the earth is disconnected from contact 220 and the relay O ₁ cannot respond as a result. The relay HR ₁ therefore remains switched on via the contacts 165 O ₁ , 166 X ₁ , 167 Ur ₁ , 168 O ₁ and 140 ^ ₁ on the test arm 139. It responds as soon as' the line selector LW reaches a locally manned line, sets the line selector through sub-

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break the circuit via the relays X ₁ and A ₂ and give the remote operator the busy signal.

Claims (10)

Patent claims: 1. Circuit arrangement for making connections of various values in telephone systems with dialer operation, in which certain connections are made ίο valence (remote connections) test devices are switched on at a connection stage upstream of the line selectors, characterized in that when a connection of a certain valence (remote connection) is established to a multiple connection, switching means (G, U ₂ ) become effective, which the setting elements (D ₃ ) of the selector (LW) to select a free line of the multiple ao specialist connection under the influence of switching devices (V ₁ , HR ₁ , HR ₂ ) of an upstream connection stage (//. GW fb) . 2. Circuit arrangement according to claim i, characterized in that when a multiple connection line group is reached (e.g. after setting to an empty contact 220) the test device (P ₂ ) of the line selector (LW) is disabled and that switching devices (O ₁ , X ₁ ) of an upstream selector (J /. GW fb ) switch on the test equipment (HR ₁ , HR ₂ ) assigned to it. 3. Circuit arrangement according to claim 2 for self-connecting telephone systems, in which the selector is set to an empty contact (220) assigned to the multiple line group, characterized in that an auxiliary switching means (preliminary test relay O ₁ ) of the upstream connection stage (//. GW fb) via the empty contact ( 220) is influenced and the test equipment (HR ₁ , HR ₂ ) is switched on in a manner corresponding to the busy state of the multiple connection lines. 4. Circuit arrangement according to claim 3, characterized in that when there are still free multiple connection lines (223 C ₄ closed) the auxiliary _{switching means (O 1} ) switches on a test relay (HR ₂ ) which comes into effect only when a free line is reached. 5. Circuit arrangement according to claim 3, characterized in that when all multiple connection lines (223 W ₄ open) are occupied, the auxiliary _{switching means (O 1} ) a relay (HR ₁ ) turns on. 6. Circuit arrangement according to claim 4, characterized in that in those cases in which the free lines present when setting the selector (LW) on the empty contact (220) are occupied during the selection movement by other selectors (LW ₁ ) , when setting of the selector (LW) to the last multiple connection line (contact 54 mk open) the test device (HR ₁ , HR ₂ ) is switched, and instead of the test relay (HR ₂ ) that only comes into effect when the line is free, the connection of the value of an existing one Connection (local or remote connection) detecting test relay (HR ₁ ) takes place. 7. Circuit arrangement according to claim ι, characterized in that when setting on a contact (220) of a multiple connection line group, a circuit for the setting members (A ₂ , D ₃ ) of the selector (LW) is prepared, which is only triggered by one of the calling station Switching process (F _x energized, X ₁ winding II short-circuited at 231 V ₁ ) comes into effect. 8. Circuit arrangement according to claim 7, characterized in that the circuit for the surge generator (A ₂ ) and the setting magnet (D ₃ ) of the selector (LW) is closed on the upstream selector. 9. Circuit arrangement according to claim 8, characterized in that the circuit runs over one of the speech wires (230). 10. Circuit arrangement according to claim 9, characterized in that the surge generator (A ₂ ) and the adjusting magnet (D ₈ ) are connected in parallel to the line (203) leading to the upstream selector and control each other in a manner known per se (110 d, S3a- ₂ ). In addition 3 sheets of drawings.