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Navigational information announcing system for motor vehicle

  • US 4,291,373 A
  • Filed: 01/19/1979
  • Issued: 09/22/1981
  • Est. Priority Date: 01/20/1978
  • Status: Expired due to Term
First Claim
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1. A navigational information announcing system for a motor vehicle comprising:

  • (a) first means for producing a first signal indicative of a measured distance travelled by a motor vehicle;

    (b) a tape player for reproducing first and second data respectively pre-recorded on a magnetic tape, said tape player including a tape driving mechanism, said first datum including plural pieces of distance information along a predetermined course, said second datum including plural pieces of navigational information in audio form;

    (c) second means responsive to said first datum, said second means producing a second signal upon termination of reproduction of one of said plural pieces of distance information and a third signal indicative of a reference distance expressed by said one piece of distance information;

    (d) third means for producing a fourth signal when said measured distance indicated by said first signal has a predetermined relationship with respect to said reference distance indicated by said third signal;

    (e) fourth means for controlling said tape driving mechanism of said tape player, said fourth means causing said tape driving mechanism to establish a pause operation in response to said second signal and to re-establish a normal playback operation in response to said fourth signal so as to reproduce one of said pieces of navigational information;

    said second means comprising;

    (a) a detector responsive to said first datum which is pre-recorded in the form of binary coded data;

    (b) a series-parallel converter responsive to the output data of said detector, said series-parallel converter producing a binary coded datum in parallel form, said series-parallel converter producing a memory control signal when series-parallel conversion of a predetermined number of bits is completed; and

    (c) a memory responsive to the output data of said series-parallel converter, said data being stored in response to said memory control signal.

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