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COMMUNICATION SYSTEM FOR HELMETED MOTORCYCLE RIDERS

  • US 3,586,977 A
  • Filed: 01/02/1969
  • Issued: 06/22/1971
  • Est. Priority Date: 01/02/1969
  • Status: Expired due to Term
First Claim
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1. A communications system for two riders on a motorcycle, comprising a pair of helmets wearable by the respective riders;

  • two pairs of earphones, each pair of earphones being mounted inside opposite walls of a different helmet;

    two junction boxes respectively mounted on exterior walls of the helmets, each junction box having a plurality of sockets connected to wiring inside the junction box;

    two throat microphones;

    spring clip means detachably mounting each microphone on a chin strap of a different helmet for direct contact with the throat of the rider;

    a waist belt for one rider;

    a radio receiver mounted on said belt for operation by said one rider;

    said radio receiver having a transistorized audio amplifier stage, said audio amplifier stage having input and output ends;

    switch means connected to the input end of said amplifier stage;

    other sockets at the radio receiver connected to the output end of the audio amplifier stage and to said switch means;

    wiring interconnecting each pair of earphones with the wiring inside a junction box on one of the helmets;

    first cable means connected between the throat microphones and a first two sockets at the respective junction boxes;

    second cable means connected between a second two sockets at the respective junction boxes;

    third cable means connected between the socket at the radio receiver and a third socket of one of the junction boxes at said one helmet, whereby the microphones can apply audio signals via said switch means to the audio amplifier stage, and whereby the earphones are connected in circuit with the output of the amplifier stage to reproduce amplified audio signals audibly;

    quick disconnect plugs at ends of said first, second and third cable means engageable in said first two sockets, said second two sockets, said third socket and the socket of the radio receiver;

    said switch means comprising a two-position switch, said radio receiver having a transistorized detector stage producing audio frequency radio broadcast signals, said switch being so arranged that in one position thereof it applies audio signals from the microphones to the input end of the audio amplifier stage, and in a second position thereof it applies audio frequency broadcast signals from the detector stage to the input end of the audio amplifier stage, whereby the earphones will selectively reproduce the audio signals from the microphones and the audio signals from the detector stage depending on the setting of said switch.

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