×

Warning device in a motor vehicle for detection of unintentional change of course

  • US 5,225,827 A
  • Filed: 04/16/1991
  • Issued: 07/06/1993
  • Est. Priority Date: 10/24/1988
  • Status: Expired due to Fees
First Claim
Patent Images

1. A warning device in a motor vehicle for issuing warning signals in case the vehicle will unintentionally deviate from a proper roadway and thereby cross the center or the edge line of the roadway, comprising an optical light transmitter for emitting light towards the roadway, a light receiver for detecting the light reflected by a white-painted road line on the roadway and for converting the light into an acoustic and/or optical warning signal, clearly perceivable to the driver, wherein the light transmitter and light receiver are operated by IR light, the light transmitter being an IR transmitting diode emitting a pulsed IR light;

  • wherein upon an intentional crossing of the road line, the function of the warning device will be interrupted by use of a control or a direction indicator and remain interrupted during a predetermined fixed or a variable period of time after the control is released or an actuator of the direction indicator is brought back to neutral;

    the duration of the warning signal being adjustable by the control; and

    the acoustic warning signal being produced by buzzers which are constructed so as to issue signals with distinctly separable frequencies for the left-hand and right-hand side of the motor vehicle, respectively.

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