Discriminates Vehicle Direction Patents (Class 340/935)
  • Interrogator-responder communication system
    Patent number: 4912471
    Abstract: An interrogator-responder communication system in which responders are carried by vehicles (such as railroad vehicles) travelling along a route and in which an interrogating station situated along the route operates each passing responder to recall data from a memory in the passing responder. In one embodiment, the responder is equipped to receive data transmitted from a transmit station and to store the received data, for later recall, in a non-volatile, electrically erasable read/write memory.
    Type: Grant
    Filed: November 3, 1983
    Date of Patent: March 27, 1990
    Assignee: Mitron Systems Corporation
    Inventors: Robert M. Tyburski, Robert W. Shillady
  • Detection system
    Patent number: 4727372
    Abstract: A railway detection system in which the presence of a train is detected by means of first inductive loop apparatus. When the train is detected second inductive loop apparatus is enabled to detect the passage of wheels of the train.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: February 23, 1988
    Assignee: Electromatic (Proprietary) Limited
    Inventor: David A. Buttemer
  • Load sensing apparatus with capacitive and inductive sensors
    Patent number: 4520885
    Abstract: A load-sensing mat comprising a pair of superposed spaced capacitance plates held together in a mat by resilient material. The load-sensing mat also contains a conductive loop for inductance dependent load detection.
    Type: Grant
    Filed: August 5, 1982
    Date of Patent: June 4, 1985
    Assignee: Yoshida Kogyo K.K.
    Inventor: Peter Jeffrey