CH270703A - Additional device for amplifying telephone calls. - Google Patents

Additional device for amplifying telephone calls.

Info

Publication number
CH270703A
CH270703A CH270703DA CH270703A CH 270703 A CH270703 A CH 270703A CH 270703D A CH270703D A CH 270703DA CH 270703 A CH270703 A CH 270703A
Authority
CH
Switzerland
Prior art keywords
additional device
telephone calls
telephone set
telephone
amplifying
Prior art date
Application number
Other languages
German (de)
Inventor
Bopp Gottfried
Original Assignee
Bopp Gottfried
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bopp Gottfried filed Critical Bopp Gottfried
Publication of CH270703A publication Critical patent/CH270703A/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/21Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/60Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Description

  

  <B>Zusatzgerät zur</B>     Verstärkung   <B>von</B>     Telephongesprächen.       Gegenstand dieser Erfindung ist ein mit  einem     Telephonapparat    induktiv koppelbares  Zusatzgerät zur     Verstärkung    von     Telephon-          gesprächen.     



  Die Erfindung soll mehreren Personen ein  Mithören eines     Telephongespräches    sowie  eine bequeme Benutzung des     Telephonappa-          rates    ermöglichen, ohne die Notwendigkeit,       das        Mikrotelephon    in der Hand halten zu       müssen.     



  Dies ist dadurch erreicht, dass gemäss der  Erfindung in ein gemeinsames, in der Nähe  des     Telephonapparates    aufzustellendes Ge  häuse eine     Induktionspule,    ein mit dieser ver  bundener Verstärker und ein an letzterem       angeschlossener    dynamischer Lautsprecher  eingebaut sind, wobei die Induktionsspule  dazu bestimmt ist, vom     Streufluss    eines Or  gans des     Telephonapparates    beeinflusst zu  werden.  



  Die Zeichnung veranschaulicht, teils sche  matisch, eine beispielsweise Ausführungsform  des Erfindungsgegenstandes.  



       Fig.    1 zeigt einen     Tischtelephonapparat,     zu dessen Gesprächsverstärkung das Gerät  dient, mit gestrichelt angedeutetem Mikro  telephon.  



       Fig.    2 stellt das Gerätegehäuse mit dem  zwecks Gesprächsverstärkung daraufgelegten       Mikrotelephon    dar.  



       Fig.    3 ist das Schaltschema dieses Gerätes.  Die zum Auflegen des Hörers M des       Telephon-Handapparates    6 bestimmte obere         Wandungsplatte    des Gerätegehäuses 1 be  steht aus einem nicht     magnetisierbaren    Mate  rial, z.

   B. aus einem     Kunstpressstoff.    In  diesem Gehäuse 1 sind, wie aus dem Schema  in     Fig.    3 ersichtlich ist, eine Induktionsspule  8, ein von der     Gleichrichterröhre    5 für den  Heizstrom und den Röhren 2 und 3 gebil  detes     Verstärkeraggregat    für die vom Hörer M  des     Telephonapparates    in der Spule 8 indu  zierten Ströme sowie ein an sich bekannter,  in der Zeichnung nicht dargestellter dynami  scher Lautsprecher eingebaut.

   4 ist die Zulei  tung für den     Anschluss    des     Verstärkeraggre-          gates    an ein Wechselstromnetz und 9 der dazu  gehörige, durch einen Knopf am Gerätegehäuse       betätigbare    Schalter. Mit 11 ist der zwischen  das     Verstärkeraggregat    2, 3, 5 und die zu  dem im Gehäuse angeordneten Lautsprecher  12     (Fig.    2) führende Leitung L eingebaute       Ausgangstranformator    bezeichnet. Der Dreh  knopf 10 am Gerätegehäuse dient für die an  sich bekannte     Tonstärkeregulierung.     



  An Stelle der     Gleichrichterröhre    5 könnte  dieses Gerät mit einem     Selengleichrichter    aus  gerüstet sein; es könnte aber auch für Bat  teriebetrieb gebaut     sein.  



  <B> Additional device for </B> reinforcement <B> of </B> telephone calls. The subject of this invention is an additional device that can be inductively coupled to a telephone set for amplifying telephone calls.



  The invention is intended to enable several people to listen in on a telephone conversation and to use the telephone set conveniently without the need to hold the microphone in their hands.



  This is achieved in that, according to the invention, in a common housing to be set up in the vicinity of the telephone set, an induction coil, an amplifier connected to this and a dynamic loudspeaker connected to the latter are built in, the induction coil being intended to remove a leakage flux Organ of the telephone set to be influenced.



  The drawing illustrates, partly cal matic, an example embodiment of the subject invention.



       Fig. 1 shows a desk phone, the device is used to amplify the conversation, with a broken line micro-phone.



       Fig. 2 shows the device housing with the microphone placed on it for the purpose of enhancing the conversation.



       Fig. 3 is the circuit diagram of this device. For hanging up the listener M of the telephone handset 6 certain upper wall plate of the device housing 1 be available from a non-magnetizable Mate rial, z.

   B. from a plastic. In this housing 1, as can be seen from the diagram in Fig. 3, an induction coil 8, one of the rectifier tube 5 for the heating current and the tubes 2 and 3 gebil detes amplifier unit for the from the listener M of the telephone set in the coil 8 indu adorned currents as well as a known, not shown in the drawing dynami cal loudspeaker installed.

   4 is the supply line for connecting the amplifier unit to an alternating current network and 9 is the associated switch which can be operated by a button on the device housing. 11 with the output transformer installed between the amplifier unit 2, 3, 5 and the line L leading to the loudspeaker 12 (FIG. 2) arranged in the housing is designated. The rotary knob 10 on the device housing is used for the known volume control.



  Instead of the rectifier tube 5, this device could be equipped with a selenium rectifier; but it could also be built for battery operation.

 

Claims (1)

PATENTANSPRUCH: Mit einem Telephonapparat induktiv kop pelbares Zusatzgerät zur Verstärkung von Telephongesprächen, dadumch gekennzeichr net, dass in einem gemeinsamen, in der Nähe des Telephonapparates aufzustellenden Ge- häuse eine Induktionsspule, ein mit dieser verbundener Verstärker und ein an letzterem angeschlossener dynamischer Lautsprecher eingebaut sind, wobei die Induktionsspule dazu bestimmt ist, PATENT CLAIM: Additional device that can be inductively coupled to a telephone set for amplifying telephone calls, marked by the fact that an induction coil, an amplifier connected to it and a dynamic loudspeaker connected to the latter are installed in a common housing to be set up in the vicinity of the telephone set, where the induction coil is designed to vom Streufluss eines Or- gans des Telephonapparates beeinflusst zu werden. to be influenced by the leakage flux of an organ of the telephone set.
CH270703D 1949-07-19 1948-10-02 Additional device for amplifying telephone calls. CH270703A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH278196T 1949-07-19
CH270703T 1949-07-19

Publications (1)

Publication Number Publication Date
CH270703A true CH270703A (en) 1950-09-15

Family

ID=25731233

Family Applications (2)

Application Number Title Priority Date Filing Date
CH270703D CH270703A (en) 1949-07-19 1948-10-02 Additional device for amplifying telephone calls.
CH278196D CH278196A (en) 1949-07-19 1949-07-19 Additional device for amplifying telephone calls.

Family Applications After (1)

Application Number Title Priority Date Filing Date
CH278196D CH278196A (en) 1949-07-19 1949-07-19 Additional device for amplifying telephone calls.

Country Status (1)

Country Link
CH (2) CH270703A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1112126B (en) * 1960-04-30 1961-08-03 Krone Kg Additional device for telephones

Also Published As

Publication number Publication date
CH278196A (en) 1951-09-30

Similar Documents

Publication Publication Date Title
GB858678A (en) Loudspeaking telephone using transistors
CH270703A (en) Additional device for amplifying telephone calls.
DE1244870C2 (en) Multi-frequency signaling device with a double resonance circuit made up of one capacitance and inductivities that can be switched on as required
US2093675A (en) Automatic telephone secretary
DE912941C (en) Circuit arrangement for calling microphone units with audio frequency current
DE1100088B (en) Arrangement for remote control of dictation machines via telephone lines
CH369172A (en) Telephone subscriber station
GB352179A (en) Speech-translating method and apparatus therefor
DE352660C (en) Circuit arrangement for line selectors, in which the line selector switches interact with special group switches
AT256948B (en) Intercom
AT135118B (en) Voters for broadcast receiving stations.
GB542257A (en) Improvements in valve operated variable reactors
AT153773B (en) Device for listening in to high-frequency currents.
GB779156A (en) A remote control device for use with apparatus incorporating a loud speaker
DE94897C (en)
DE29702769U1 (en) House intercom with integrated cordless telephone for connecting calls between the house intercom and any other telephone
DE556887C (en) Telephone receiver arranged within an air cushion
AT228848B (en) Circuit arrangement for tone-frequency touch dialing with voice-protected receivers
DE336208C (en) Device for amplifying telephone currents
DE2105502A1 (en) Toy phone
AT106096B (en) Device for detecting hidden metal parts.
GB939176A (en) Improvements in or relating to telephone subscriber&#39;s apparatus
CH240686A (en) Switching device in an electro-acoustic transmission system.
AT236466B (en) Circuit arrangement for a relay-free, button-controlled intercom system for the traffic type &#34;everyone with everyone&#34;
AT136837B (en) Telephone handset with number switch.