FR2427014A1 - AUTOMATIC SWITCHING TWO-WAY RADIO-ELECTRIC COMMUNICATION KIT - Google Patents

AUTOMATIC SWITCHING TWO-WAY RADIO-ELECTRIC COMMUNICATION KIT

Info

Publication number
FR2427014A1
FR2427014A1 FR7913223A FR7913223A FR2427014A1 FR 2427014 A1 FR2427014 A1 FR 2427014A1 FR 7913223 A FR7913223 A FR 7913223A FR 7913223 A FR7913223 A FR 7913223A FR 2427014 A1 FR2427014 A1 FR 2427014A1
Authority
FR
France
Prior art keywords
microphone
way radio
transmitter circuit
automatic switching
voice
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR7913223A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WHITE MAYNARD
Original Assignee
WHITE MAYNARD
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
Priority claimed from US05/909,685 external-priority patent/US4166978A/en
Application filed by WHITE MAYNARD filed Critical WHITE MAYNARD
Publication of FR2427014A1 publication Critical patent/FR2427014A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/30—Mounting radio sets or communication systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne les ensembles de communication radioélectrique bidirectionnelle, destinés à être montés dans un casque. L'ensemble selon l'invention comprend un circuit émetteur qui ne fonctionne pas normalement et dont le fonctionnement est déclenché par une voix, et un circuit récepteur qui fonctionne normalement. Le circuit émetteur comprend un microphone et un commutateur électronique qui commande le fonctionnement du circuit émetteur et l'arrêt du circuit récepteur en présence d'un signal de sortie du microphone, la commutation inverse étant réalisée pratiquement dès que le microphone ne transmet plus de signal, et en particulier à la moindre pause de la voix de la personne qui parle. Les communications bidirectionnelles sont ainsi assurées presqu'en temps réel, un utilisateur pouvant interrompre l'autre. Application aux ensembles de communication pour pompiers, ouvriers du bâtiment et de l'industrie, etc.The invention relates to two-way radio communication assemblies, intended to be mounted in a helmet. The assembly according to the invention comprises a transmitter circuit which does not operate normally and whose operation is triggered by a voice, and a receiver circuit which operates normally. The transmitter circuit comprises a microphone and an electronic switch which controls the operation of the transmitter circuit and the shutdown of the receiver circuit in the presence of an output signal from the microphone, the reverse switching being carried out practically as soon as the microphone no longer transmits a signal. , and in particular at the slightest pause in the voice of the person speaking. Bidirectional communications are thus ensured almost in real time, one user being able to interrupt the other. Application to communication sets for firefighters, construction and industrial workers, etc.

FR7913223A 1978-05-25 1979-05-23 AUTOMATIC SWITCHING TWO-WAY RADIO-ELECTRIC COMMUNICATION KIT Withdrawn FR2427014A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/909,685 US4166978A (en) 1976-09-07 1978-05-25 Two-way voice controlled communication system

Publications (1)

Publication Number Publication Date
FR2427014A1 true FR2427014A1 (en) 1979-12-21

Family

ID=25427662

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7913223A Withdrawn FR2427014A1 (en) 1978-05-25 1979-05-23 AUTOMATIC SWITCHING TWO-WAY RADIO-ELECTRIC COMMUNICATION KIT

Country Status (8)

Country Link
JP (1) JPS54154212A (en)
BR (1) BR7901085A (en)
CA (1) CA1116239A (en)
DE (1) DE2920834A1 (en)
FR (1) FR2427014A1 (en)
GB (1) GB2021902B (en)
IT (1) IT1116191B (en)
MX (1) MX145103A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271247B (en) * 1992-10-05 1997-02-19 Motorola Israel Ltd A radio telephone for a vehicle
DE9409319U1 (en) * 1994-06-08 1995-07-06 Berlin, Florence, Genf Transceiver
WO2008119866A1 (en) * 2007-03-30 2008-10-09 Savox Communications Oy Ab (Ltd) A radio communication device

Also Published As

Publication number Publication date
BR7901085A (en) 1979-11-20
GB2021902B (en) 1982-08-25
MX145103A (en) 1982-01-05
CA1116239A (en) 1982-01-12
DE2920834A1 (en) 1979-11-29
JPS54154212A (en) 1979-12-05
GB2021902A (en) 1979-12-05
IT7949130A0 (en) 1979-05-22
IT1116191B (en) 1986-02-10

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Legal Events

Date Code Title Description
ST Notification of lapse