CH312272A

CH312272A - Installation for controlling an electromagnetic sound recording and reproducing apparatus.

Info

Publication number: CH312272A
Authority: CH
Inventors: Eugene Tyszkiewicz Stefan
Original assignee: Eugene Tyszkiewicz Stefan
Priority date: 1952-05-03
Filing date: 1953-05-04
Publication date: 1955-12-31

Description

Installation de commande d'un appareil electromagnetique d'enregistrement et de reproduction du son. L'invention a po#ur objet une inatallation de commande d'un appareil eleetroma.gnetique d'enregistrement et de reproduction du son. Installation of the control of an electromagnetic sound recording and reproduction device. The invention has for object a inatallation of control of an eleetroma.gnetique device for recording and reproducing sound.

Le but principal de 1'invention est de per- mettre d'utiliser un tel appareil depuis un point,eloigni par 1'intermediaire de deux con- dueteurs, tels que des fill telephoniques; et au moyen d'un mierophone, d'un ecouteur et de moyens d'interruption, par exemple un poste tetephonique atandard ayant un cadran d'appel, 1e cadran ou les moyens d'interiup- t.ion servant ä sel@eetionner les operations de 1'appareil, par exemple 1'enregistrement du son regu par 1e mierophone ou La reproduc- tion dann l'ecouteur du son enregistre. The main object of the invention is to make it possible to use such an apparatus from a remote point via two conductors, such as telephone wires; and by means of a telephone, an earpiece and interruption means, for example a standard telephone set having a call dial, the dial or the interruption means serving to select the calls. operations of the apparatus, for example the recording of the sound received by the microphone or the reproduction in the earphone of the recorded sound.

L'inatallation objet de 1'invention, dans 1a- quelle ledit appareil est agence pour enregis- trer un son recueilli par un microphone et pour reproduire 1e son enregistre dann un ecouteur associe au microphone, comprenant des moyens d'interruption aetionnes ä la main pour determiner 1'enregistrement et la repro- duction; est caracteiis'ee en ce qu'elle eom- prend deux conducteurs reliant 1'appareil au mieroplione, .ä 1'ecouteur et auxdits moyens dInterruption, ces conducteurs transportant un courant ä frequence audible de et vers 1'appareil, ainsi que des impulsiow depuis lesdits moyens d'interruption vers 1'appareil, et en ce qu'elle comprend des moyens de se- paration agences pour maintenir les impul.- sions leparees dudit courant dann 1'appareil: La figure unique du .dessiu annexe repre- sente, ä titre d'exemple, 1e schema electrique dune forme d'execution d e 1'instaillation selon 1'invention. The birth object of the invention, in which said apparatus is arranged to record a sound picked up by a microphone and to reproduce the recorded sound in an earphone associated with the microphone, comprising manually operated interrupting means to determine recording and reproduction; is characterized in that it comprises two conductors connecting the apparatus to the mieroplione, to the earphone and to the said interrupting means, these conductors carrying a current at audible frequency from and to the apparatus, as well as pulses from said interruption means to the apparatus, and in that it comprises separation means arranged to maintain the pulses separated from said current in the apparatus: The single figure of the appended drawing represents , by way of example, the electrical diagram of a form of execution of the installation according to the invention.

L'installation representee comprend un" microphone, Z.in ecoüteur et un seleeteur du type ä cadran, sous forme dun poste tele= phonique conatituant un dispositif de com- mande de 1'applareil- Sur 1e dessin, 1e poste telephonique eist delimite par 1e rectangle 11 en pöintill4, d'oü partent une paire de lignes telephoniques 12 et 13, interrompiies _pour mon(rer qii'elles s'etendent sur une 'certaine distance. 0n trouve au poste telephonique, comme elements essentiell ,de la commande ä realiser, un com= bine portatif (non represente) comprenant 1e, mierophone et 1'ecouteur, un interrupteur 1!1S du combine, dönt le contaet est coupe lorsque 1e combine repose sur son sapport, un conta^t de cadran D, äctionne :par le cadran et donnant un nombre de fermetüres etRTI ID="0001.0269" WI="8" HE="3" LX="1667" LY="2017"> d'ou:- vertures de circizit en relation avee 1'angle dopt ie cadrän a ete toilrne avant d'etre li- b6re, et une resistanee R2 en parallele sur 1e contact D pour empeeher que 1e eireuit pas= sant par le poste telephorique ne soit entiere- inent coupe quand -ce cöntact est actionne. La cöiigtruction de .l'interruptgur, 4 cadran est telle qu'en Position de repos 1e contact est ouvert. Des que lle cadran tourne, 1e contaet est Ferme et feste ferme jusqu'ä ce que 1e cadran sofft libere. Quand 1e eadran est libere, 1e_ contact s'ouvre et lorsque 1e cadran revient ä sa Position de repos; 1e contact se ferne un nombre de fois dependant de 1'angle de rota- tion du cadran. The installation shown comprises a microphone, an earpiece and a dial-type selector, in the form of a telephone set constituting a device for controlling the apparatus. In the drawing, the telephone set is delimited by the first rectangle 11 in dotted line 4, from which start a pair of telephone lines 12 and 13, interrupted so as to show that they extend over a certain distance. to produce a portable handset (not shown) comprising the first telephone and the earpiece, a switch 11S of the handset, the contact of which is cut off when the handset is resting on its connection, a dial contact D, actuates :by the dial and giving a number of closures andRTI ID="0001.0269" WI="8" HE="3" LX="1667" LY="2017"> from where:- circizit openings in relation to 1' angle adopted by the dial was twisted before being released, and a resistor R2 in parallel on contact D to prevent the circuit passing through the telephoric set from being completely cut off when this contact is actuated. The construction of the switch, 4 dial is such that in the rest position the contact is open. As soon as the dial turns, the contaet is Closed and stays closed until the dial is released. When the dial is released, the contact opens and when the dial returns to its resting position; the contact closes a number of times depending on the angle of rotation of the dial.

La ligne 14 en pointild6e entoure 1'appareil de commande qui esst utilise en cooperation avee 1'appareil pour 1'enregistrement et la. re- production eleetromagnetique du son. Les fils telephoniques 12 et 13 entrent Jans cet appa- seil et il leer est eonneete, pour les besoins de la commander une bobine de relais extra- rapide IR ä deux enroulements, de sorte qu'un courant d'excitation peut alümenter ehaque ligne au travers dun enroulement ayant une inductance telle qu'il ne se produit pas de peste importante d'energie ä frequence acous- tique. Les sourees d'alimentation de 1'appa- reil de commande sont d'un type cllassique et comprennent un transformateur T1 connecte ä un räseau d'6leatricite par 1'interm6diaire de fusibles F1 et F2 et d'un iüterrupteur S1, 1e transformateur afmentant un redresseur en pont 111R1 dopt le courant continu qu'il delivre est filtre au moyen dune self CH1 et d'un condensateur C1. La tension continue pröduite et egalisee est transmise par un con- ducteur positif 15 et par u3 .eondueteur ne- gatif de retour commun 16. Une resistance de Charge R1 en shunt ä la sortie du montage redresseur empeche la produetion de tensions de Grete exagerees. Le relais extrarapide poss'ede une paire @de contacts IR1 et IR2, dont de Premier se ferne et 1e seeond s'ouvre l.orsque le redais est exeite. Le fonctionnement des contaets s'opere avee recouvrement, en ce sens que Pendant d'excitation ou la d@sexcita- tion du relais ä grande -vritessse, les contaets IR1 et IR2 sant fernes simultianement. Le contact IR1, quand il est Ferme, permet au cöurant de passer des condueteurs 15 et 16 ä un Premier rela.is temporise ayant un en- roulement A comm.ändant trois contaets, A1, A2 et A3, parmi lesquels A1 et A2 sont fernes .et A3 oüvert quand cet enroulement est ali- mente. Le contaet A2 est conneete en serie avec 1e conta:et IR2, et ees contaets comman- dent, par leur aetion c onjugu6e, 1e Passage du courant des condueteurs 1:5 et 16 ä 1'enroule- ment PS dun setecteur rotatif. Un deuxieme relais RTI ID="0002.0277" WI="15" HE="4" LX="1241" LY="468"> temporise B lest excite par 1e contact A1. Pour ce deuxieme relais, un eontact BI se ferne, et un contact B2 s'ouvre lorsque 1'enroulement lest alimente. Le seleeteur rota- tif p,ossede aeux bras de eontact rotatifs PSA et PSB qui coop#rent respectivement avec deux rangees @de conta-ets PS1 et PS2. Tous les contacts de 1j, ramoe PS1 sont conneetes ensemble, ä l'exception dun contact PS11, pour la Position de repos du seleeteur. Dune manAre semblable, u3 contact PS21 dann la rangee PS2 West Das conneete Fans la Posi tion de repos. Un contact PS3 n'est pas ou- vert lorsque 1'enroulement PS est sous ten- sion et il sert ä faire tourner automatique- ment 1e s6leeteur rotatif jusqu'ä la posztion de repos lorsqu'un circuit se Ferme, depuis les condueteurs 15 et 16, par 1e bras PSA, connnecte Eaux contacts PS1, .1e contaet B2, 1e contact PS3 et 1'enroulement PS. Dotted line 14 surrounds the control device which is used in cooperation with the device for recording and downloading. electromagnetic reproduction of sound. Telephone wires 12 and 13 enter this apparatus and a two-winding IR high-speed relay coil is supplied for control purposes so that an excitation current can be supplied to each line at the same time. through a winding having such an inductance that no significant loss of acoustic frequency energy occurs. The power supply sources of the control apparatus are of a conventional type and comprise a transformer T1 connected to an electricity network through the intermediary of fuses F1 and F2 and a switch S1, the transformer supplying a bridge rectifier 111R1 adopts the direct current it delivers and is filtered by means of an inductor CH1 and a capacitor C1. The produced and equalized DC voltage is transmitted through a positive conductor 15 and through a common return negative conductor 16. A shunt load resistor R1 at the output of the rectifier assembly prevents the generation of excessive high voltages. The high-speed relay has a pair of contacts IR1 and IR2, the first of which closes and the second opens when the relay is activated. The operation of the contacts takes place with overlap, in the sense that During excitation or de-excitation of the high-speed relay, contacts IR1 and IR2 close simultaneously. Contact IR1, when closed, allows current to flow from conductors 15 and 16 to a First timed relay having winding A controlling three contacts, A1, A2 and A3, of which A1 and A2 are closed and A3 open when this winding is energized. Contact A2 is connected in series with contact IR2, and these contacts control, by their combined action, the passage of current from conductors 1:5 and 16 to the winding PS of a rotary selector. A second RTI relay ID="0002.0277" WI="15" HE="4" LX="1241" LY="468"> delays B ballast energized by contact A1. For this second relay, a contact BI closes, and a contact B2 opens when the ballast winding is energized. The rotary selector has two rotary contact arms PSA and PSB which cooperate respectively with two rows of contacts PS1 and PS2. All the contacts of 1j, Ramoe PS1 are connected together, with the exception of a contact PS11, for the Home position of the selector. In a similar manner, u3 contact PS21 in the PS2 West row Das connected to the Resting Position. A PS3 contact is not open when the PS winding is energized and is used to automatically rotate the rotary selector to the rest position when a circuit closes, from conductors 15 and 16, via the first arm PSA, connects Water contacts PS1, the first contact B2, the first contact PS3 and the winding PS.

Chacun des contacts 1 .ä 10 de la rangee PS2 du selecteur rotatif est conneete ä un relais separe ä maintien automatique dont un, eonneete au contaet 5, est repr ,esente par le bobinage K et les contaets K1 et K2 qui sont tour deux fernes lorsque 1e bobinage K est alimente. Chacun des autres contacts 2 ä 1.0 est conneete ä -an relais sembdable ä maintien automatique. En fait, les relais ä maintien automatique font Partie de 1'appareil d'enre- gistrement et de reproduetion et sont alimen- Ms en courant d'exeitation ä partir de cet apparevl. La connexion de retour commun pour cet appareil est montree par 1e condue- teur 17 qui est eonneet6, au travers des eon- taets A3 et B1, au bras de seleeteur rotatif PSB. La bobine K du relais ä maintien auto- matique est alimentee par 1'appareil gräce an conducteur 18 et 1e eircuit Passant par cette bobine se ferine sofft par les contacts 5, B1 et A3 ou par das contacts K1 et A13. Les con- täets K2, quand ils se Ferment,. completent u3 circuit servant ä provoquer une certaine ope- ration de 1'appareil. Each of the contacts 1 to 10 of row PS2 of the rotary selector is connected to a separate self-holding relay, one of which, given to contact 5, is represented by the coil K and the contacts K1 and K2 which are in turn two closed. when the 1st winding K is energized. Each of the other contacts 2 through 1.0 are connected to a similar self-holding relay. In fact, the self-holding relays form part of the recording and reproducing apparatus and are supplied with driving current from this apparatus. The common return connection for this apparatus is shown by conductor 17 which is connected, through contacts A3 and B1, to the rotary selector arm PSB. Coil K of the self-holding relay is supplied by the apparatus through conductor 18 and the circuit passing through this coil is terminated by contacts 5, B1 and A3 or by contacts K1 and A13. The K2 contacts, when they Close,. complete a circuit serving to bring about a certain operation of the apparatus.

Le fonctionnement est 1e suivant: Quand an d & sire commander une opera- tion partieuliere, an amene de cadran d'appel du poste teläphonique & ur la Position repre- sentant cette operation; il est suppose, par exemple, qu'on desire effectuem 1'operation cox- respondant au contaet 5 @du selecteur rotatif. La Premiere rotation du cadran ferne 1e con- tact D -pour alimenter la bobirre IR, ce qui ferne 1e contaet IRl et ouvre ie contaet IR2. La fernrleture @du contaet IR1 provoque 1'exci- tation du relais A qui ferne lies contacts Al et A2 et ouvre 1e contaet A3. La fermeture du coritaet A1 provoque l'excitation du: relais B, ce qui Fait que 1e contaet B1 se ferne et 1e contaet B2 s'ouvre. Quand än libere 1e ca- dran, il revient ä sa Position de repos en ouvrant et en fermant einq fois 1e contaet D. Les contaets IRl et IR2 du relaisextrarapide sont rapidement ouverts et fernes cinq fois, mais les bobirres de reIais A et B restent exci- t6es ä sause de leur caracteristique d'inertie. Ainsi, 1'enroulement PS regoit cinq impul- sions @de courant qui font progresser les bras PSA et PSB Das ä Das de einq positions. De Bette maniere, 1e bras PS-4 est connecte ä un contaet PSI, tandis que 1e bras PSB est cori necte au contaet 5. Apres avoir Omis cinq impulsions, 1e contaet D reste oüvert et 1e relais IR est desexcit4, ce qui ouvre. 1e contaet IRl et Ferme 1e contaet IR2. Le relais A est @ainsi :dLexcit6 une foir sa temporisation ter- minee, se qui ouvre les eontaets Al et A2 et ferne .1e contaet A3. La fermeture de ce der= nier eontact complete un circuit Passant Par la bobirre K du relais ä maintien automatique, 1e contaet B1, 1e bras PSB et 1e contaet 5, ce qui exeite ce relais et Ferme ses contacts K1 et K2. La ferm.eture du contaet K1 complete un deuxieme cirelät pour 1'exeitation de la bobirre K ä travers 1e contaet A3. Des: que 1e contaet A1 est ouvert, 1e circuit @passant par B est eoupe et apres que la temporisation de ce dernier relais est terminee, 1e co@ntact Bl s'ouvre et lle contaet B2 se ferne. L'ouverture du contaet B1 doupe lte cireuit allaut ä l'en- roulement K et Passant par 1e bras PSB et Ie contaet 5, mais 1e eircuit de maintien Das saut par les <RTI ID="0003.0280" WI="13" HE="4" LX="1265" LY="273"> contacts A3 et K1 existe tou- jours, de sorte que 1e contact K2 reste Ferme pour assurer fa continuation dIe 1'operation partimliere prevue. La fermeture :du eontact B2 alimente en courant #le contaet PS3 et la bobirre PS en provoquant .1a rotation des bras PSA et PSB jusqu'ä ce quo les bras attei- gnent la Position de repos, ce qui a lieu lors= que 1e bras. PSA atteint 1e contaet PSll et coupe 1e circuit allaut au contact PS3 et ä la bobirre PS. La produetion d'etincelles sur 1e contaet PS3 esst empech6e au moyen de la re- sistance R3 et @de la capacite C4. Urre fois ä, la Position de repos, 1e diepositif de commande est pret pour commander d'äutres operations au moyen du c'adran d'appel. Jusqu'ä ce que 1e cadran sofft deplacä, 1'operation commandee par les contaets K2 va continuer. Des qu'on Fait tourner 1e cad'ran pour une autre op6ra- tion, et que les reIais IR etA sont exeites, 1e contaet A3 s'ouvre, ce qui coupe 1e cireuit Passant par 1e contaet K1, d4sexcite 1e relais K et ouvre les contaets K1 et K2. De cette manAre, 1'op'eration partieuliere command4e par 1e contaet K1 .est arretee. En liberant 1e cadran, une autre operation Sera choisie, comme i1 a 4t4 deerit ei dessus. Pour tour les -velais de maintien, 1e circuit de retour des eontaets de maintien passe par 1:e contaet A3, de Sorte que ce eontact Deut couper n'importe quel cireuit de maintien. Gräce au dispositif de commande d4crit, il est possible d'employer un te1ephone eloign6 pour enregistrer et re- produire la Parole; an Deut supposer, par exemple, qu'on adjoigne un Service d'enregis- trement ä un central telephonique, et toute personne, par exemple un honune d'affaires ayant um telephone, pourrait faire enregistrer un memoire, :des lettres, ete., pour etre ulte- rieurement daetylographigs. En ce qui con- cerne 1'enregistrement ou la reproduction, les lignes t6lephoniques reliees au dispositif de commande sont eonnect & s au travers de con- densateurs de blocage C2 et C3 ä 1'appareil enregistreur et peuvent vehiculer les cönver- sations etablier dann un eens ou jane 1'aatre avec 1e poste telephronique. Pour l.'enregistxe- ment et Ja repreduction, los differentes ma- n(euvres qu'on peut realiser avec 1e cadran peuvent representer los operations suivantes: 1 Enregistrement de la parole .par le telephone. . Operation is as follows: When you wish to command a particular operation, bring the call dial from the telephone set to the Position representing this operation; it is assumed, for example, that you want to perform the operation corresponding to contact 5 @ of the rotary selector. The first rotation of the dial closes contact D - to power the IR coil, which closes contact IR1 and opens contact IR2. Closing @ of contact IR1 causes relay A to energize which closes contacts Al and A2 and opens contact A3. Closing coritaet A1 energizes: relay B, which means that 1st contact B1 closes and 1st contact B2 opens. When än releases the dial, it returns to its rest position by opening and closing contact D five times. relay coils A and B remain energized due to their inertia characteristic. Thus, the PS winding receives five current pulses which advance the PSA and PSB arms Das to Das five positions. In this way, arm PS-4 is connected to contact PSI, while arm PSB is connected to contact 5. After omitting five pulses, contact D remains open and relay IR is desexcit4, which opens. 1st contaet IRl and Close 1st contaet IR2. Relay A is @thus: de-energized once its time delay has elapsed, which opens contaets Al and A2 and closes contaet A3. Closing of the latter contact completes a circuit passing through winding K of the self-holding relay, contact B1, arm PSB and contact 5, which activates this relay and closes its contacts K1 and K2. Closing contact K1 completes a second circuit for executing coil K through contact A3. As soon as contact A1 is open, the circuit passing through B is cut off and after the time delay of this last relay is over, contact B1 opens and contact B2 closes. The opening of contact B1 doubles the circuit goes to winding K and Passing through arm PSB and contact 5, but the holding circuit Das jumps through <RTI ID="0003.0280" WI="13" HE ="4" LX="1265" LY="273"> contacts A3 and K1 still exist, so that contact K2 remains closed to ensure the continuation of the particular operation foreseen. The closing of contact B2 supplies current to contact PS3 and winding PS by causing the arms PSA and PSB to rotate until the arms reach the rest position, which takes place when the first arm. PSA reaches contact PSll and breaks the circuit to contact PS3 and coil PS. The production of sparks on contact PS3 is prevented by means of resistor R3 and capacitor C4. A rst time at the Home Position, the control device is ready to command other operations by means of the call dial. Until the dial is moved, the operation controlled by contacts K2 will continue. As soon as the dial is rotated for another operation, and the IR and A relays are energized, contact A3 opens, which breaks the 1st circuit Passing through the 1st contact K1, de-energizes the 1st relay K and opens the contacts K1 and K2. In this way, the partial operation commanded by contact K1 is stopped. When releasing the dial, another operation will be selected, as 4t4 deerit above. To turn the hold switches, the return circuit from the hold switches goes through contact A3, so this switch should shut off any hold switches. Thanks to the control device described, it is possible to use a remote telephone to record and reproduce the Speech; Suppose, for example, that a recording service is attached to a telephone exchange, and any person, for example a business man having a telephone, could have a memorandum, letters, etc. recorded. , to be later daetylographed. With regard to recording or reproduction, the telephone lines connected to the control device are connected through blocking capacitors C2 and C3 to the recording device and can carry the conversations established in the recording device. a eens or jane 1'atre with the 1st telephone. For recording and playback, the various operations that can be performed with the dial may represent the following operations: 1 Recording of speech by telephone.

2 Arret de 1'enregistrement. 2 Stop recording.

3 Envoi d'ün Signal repere pour marquer, sür 1e Support d'enregistrement, 1a 4in dune lottre ou: d'un paragraphe determine. 3 Sending of a Marker Signal to mark, on the Recording Medium, 1 to 4 in a given letter or paragraph.

4 Reproduetion par 1e moyen du Ule- phone, de la conversation enregistree depuis 1e dernier Signal repere. 4 Reproduction by means of the Ulephone, of the conversation recorded since the last signal detected.

Bien quo dann 1'exemple deerit, 1'appareil coopere avec un poste telephonique qui West pas du type Standard, il est clair qu'on pour- rait commander 1'appareil :ä partir .d'u.n poste telephonique au,tomatique ständard. Daus ce cas, 1'appareil enregistreur .et reproducteur peut etre mis en fonetionnement en formant par-le cadran un nombre pärticulier ä partir de tout poste telephonique ä .cadran, los ope- rätions subsequentes etant commandees par je cadran. Il faut noter quo ;los deux condueteurs qui s'etendent depuis le telephone ä travers 1e- central jusqu'ä 1'appareil ne-sont pas des conducteurs -.directs, mais quo des eon- densateurs sont interposes dang .los condüc- teurs du central. Cola si.gnifie necessairement quo los Impulsions atteignant 1'appareil lors du fonetionnement du cadran sont faibles, ce qui peut entrainer la necessite d'inclure des möyens ämplificateurs des Impulsions dans 1'appärel. Although in the above example the apparatus cooperates with a telephone set which is not of the Standard type, it is clear that the apparatus could be controlled: from a telephone set at the automatic standard. In this case, the recording and reproducing apparatus can be put into operation by dialing a particular number from any telephone set at the dial, the subsequent operations being controlled by the dial. It should be noted that the two conductors which extend from the telephone through the exchange to the apparatus are not direct conductors, but that capacitors are interposed in the conductors. from the center. This necessarily means that the pulses reaching the device when operating the dial are low, which may lead to the need to include pulse amplifier means in the device.

Claims

CLAIM: Installation for controlling an electromagnetic sound recording and reproducing device arranged to record a sound picked up by a microphone and to reproduce the recorded sound in an earphone associated with the microphone, comprising means of interrupter operated by hand to determine the recording and the reproduction, characterized in that it comprises two conductors connecting the apparatus to the microphone, to the earphone and to the said interrupting means, these conductors carrying - which transmits at audible frequency to and from the device, as well as pulses from said interrupting means to the device, and in that it comprises separation means arranged to keep the pulses separate said current in the apparatus. device, a selector arranged to energize any one of the self-holding relays, RTI ID="0004.0271" WI="5" HE="3" LX="1218" LY="929"> a motor driving the drive to a position in accordance with the pulses received from the manually operated interrupting means for operating the corresponding self-holding relay, and automatic means for returning the drive to the drive. rest position after a determined delay relative to the instant of operation.

2. Installation according to claim and sub-claim 1, characterized in that it comprises. a high-speed relay sensitive to individual pulses, and a first timer relay insensitive to individual pulses. acting on the reception of the pulses to send them to the selector and, when the pulses out cease, to switch the selector @ for automatic operation in order to bring it back to its rest position.

3. Installation according to claim and sub-claim 2, characterized in that it comprises a second timed relay ac- tionn6 by said first timed relay, and contacts connected in such a way that the first selector is brauched for exeitation of a self-holding relay only during the timing delay of said second relay.

4. Installation according to claim, characterized in that it comprises means acting on the start of the operation of the manual control to release any energized automatic holding relay.

5. Installation according to claim, characterized in that the selector is of the rotary type operating step by step thanks to a control coil, the selector comprising a row of turn contacts connected together except one for the position of at rest, and a contact directly under the control of said winding to allow the automatic rotation of the selector, the current necessary for energizing the control winding of the selector being provided by the contacts of the selector connected together, so that the rotation can continue until the unconnected contact, in the rest position, interrupts the flow of current.

6. Installation according to claim, characterized in that it comprises a direct current source directly controlled by the call dial for the relays of the control apparatus, the direct current being supplied at six lines through : at least one inductance coil and the lines supplying the recording and reproduction apparatus through blocking capacitors.