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Motor vehicle time speed recorder

  • US 5,639,967 A
  • Filed: 12/11/1995
  • Issued: 06/17/1997
  • Est. Priority Date: 12/11/1995
  • Status: Expired due to Fees
First Claim
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1. A method of using a motor vehicle time speed recorder, the motor vehicle having a battery, a speedometer, and an ignition switch, comprising the steps of:

  • a) initializing a set time, so that a continuously running clock motor of a time means of said motor vehicle time speed recorder is set to correspond to the actual time and that the position of a clock signal pen of said motor vehicle time speed recorder is properly set so as to assure that said continuously running clock motor is set to correspond to the actual time and that the position of said clock signal pen is properly set, since the battery of the motor vehicle may have run down or may have become completely dead, which will alter results;

    b) causing said clock signal pen, by said continuously running clock motor, to draw a substantially sinusoidal time curve on a roll of recording paper tape time portion of a roll of recording paper tape of said motor vehicle time speed recorder when the motor vehicle is moving since said continuously running clock motor revolves once every twenty four hours and an elongated rod of said time means is pivotally mounted to a perimeter of a circular disk of said time means and when the motor vehicle is not moving, said clock signal pen draws only one oscillating vertical line on said roll of recording paper tape time portion each time the ignition switch of the motor vehicle is in the off position, so that said roll of recording paper tape is not advanced and unnecessarily used when the motor vehicle is not running;

    c) causing a speed signal pen of said motor vehicle time speed recorder, by a speed signal from the speedometer of the motor vehicle, to draw a speed curve on a roll of recording paper tape speed portion of said roll of recording paper tape below and synchronized with said substantial sinusoidal time curve; and

    d) advancing said roll of recording paper tape through an elongated slot in a front of a hollow parallelepiped-shaped housing, by said tape motor, so that said substantially sinusoidal time curve and said speed curve can be compared and the speed for a particular time can be determined.

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