×

Electronic tachograph

  • US 4,083,052 A
  • Filed: 06/16/1976
  • Issued: 04/04/1978
  • Est. Priority Date: 06/16/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. In an electronic tachograph including recording means for recording at least indications of the distance travelled by a vehicle and the speed of the vehicle, the combination comprising input means for providing distance pulses indicative of the distance travelled by a vehicle, timing means operable to provide timing pulse, first means for deriving from said timing pulses a first output indicative of time, adjustable means resposive to said timing pulses for periodically sampling said distance pulses during sampling periods of a preselected duration to provide a predetermined number of distance pulses at an output thereof during a given sampling period for a predetermined distance of travel by said vehicle, second means responsive to said predetermined pulses for deriving a second output indicative of the speed of said vehicle, and third means responsive to said predetermined pulses to provide a third output indicative of the distance travelled by said vehicle, said recording means being responsive to said first, second and third outputs for recording said indications of distance and speed for said vehicle in relation to time.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×