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System for indicating operation time of motor vehicles and the like

  • US 4,616,208 A
  • Filed: 02/17/1983
  • Issued: 10/07/1986
  • Est. Priority Date: 03/26/1982
  • Status: Expired due to Fees
First Claim
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1. A system for informing a driver of a vehicle of elapsed driving time, said system comprising:

  • means for detecting starting and stopping of the driving of the vehicle;

    a first timer for counting a limit driving time period;

    first electric circuit means connecting said detecting means to said first timer, causing the first timer to start operating to count driving time in response to detection of the starting of the driving of the vehicle by said detecting means;

    a second timer for counting a rest time period;

    second electric circuit means connecting said detecting means to said second timer, causing the second timer to start operating to count rest time in respect to detection of stopping of driving of the vehicle by said detecting means;

    warning means for generating and emitting a warning;

    third electric circuit means connecting said first timer to said warning means, causing the warning means to generate and emit a warning in respect to completion of the counting of said limit driving time period by said first timer;

    fourth electric circuit means connecting said second timer to said warning means, causing the warning means to become inoperative in response to completion of the counting of said rest time period by said second timer; and

    fifth electric circuit means connecting said detecting means to said first and second timers permitting the counting operation of the first timer to continue and causing the counting operation of the second timer to be nullified in response to detection, by said detecting means, of restarting of the driving of the vehicle before completion of the counting of said rest time period by the second timer.

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