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Apparatus for hands-free operation of a mobile telephone unit in a car

  • US 5,490,213 A
  • Filed: 11/28/1994
  • Issued: 02/06/1996
  • Est. Priority Date: 11/28/1994
  • Status: Expired due to Fees
First Claim
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1. An apparatus for permitting hands-free operation of a mobile telephone unit in a car, comprising:

  • a wireless microphone transmitter, to be disposed in a passenger room of the car, for generating wireless outgoing signals corresponding to sounds picked up in the passenger room; and

    a main terminal including;

    a terminal housing to be disposed in the passenger room, said terminal housing confining a receiving space and having one end adapted to be inserted into a cigarette lighter socket of the car;

    a circuit board mounted in said receiving space;

    a receiver circuit mounted on said circuit board and capable of receiving said wireless outgoing signals from said transmitter;

    a connector unit including an electrical cable having one end connected electrically to said receiver circuit and an opposite end extending out of said terminal housing, and a telephone connector connected electrically to said opposite end of said electrical cable and adapted to be connected electrically to the mobile telephone unit to enable the mobile telephone unit to receive said wireless outgoing signals from said receiver circuit and transmit wirelessly said wireless outgoing signals;

    a loudspeaker mounted on said circuit board and connected electrically to said one end of said electrical cable, wireless incoming signals received by the mobile telephone unit being received by said loudspeaker via said electrical cable, said loudspeaker generating an acoustic output corresponding to the wireless incoming signals; and

    a set of electrical contacts provided on said one end of said terminal housing and connected electrically to said receiver circuit and said loudspeaker, said electrical contacts being adapted to connect electrically said receiver circuit and said loudspeaker to a car battery of the car via the cigarette lighter socket so as to permit supply of electric power to said receiver circuit and said loudspeaker.

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