Patents Issued in May 15, 1976
  • Vehicle zero speed detection system
    Patent number: 3958783
    Abstract: A signal transmitter provides an oscillatory signal to an antenna situated along a vehicle stopping area. The antenna has incremental transpositions along its length for reversing the phase of the magnetic field produced at each transposition in response to the provision of the oscillatory signal. Signal receiving means on a vehicle sense the phase reversals of the magnetic field, and when the phase reversals are sensed at a rate proportional to a defined zero speed of the vehicle, at least one door on the vehicle is opened.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: May 15, 1976
    Assignee: Westinghouse Electric Corporation
    Inventor: Richard S. Rhoton