Patents Assigned to Railroad Transportation Communication Technologies (RTCT) LLC
  • Rail communications system
    Patent number: 6830224
    Abstract: A method and apparatus for transmitting an information carrying signal, such as an electromagnetic frequency signal or an acoustic signal, through the tracks of a railroad to a remote position on the track where the information is extracted. The extracted information can be used to relate speed and location of trains, location of obstructions, and/or track conditions. The in situ track (10) is evaluated using an autoranging digital multimeter which establishes the resistance between two opposite rails (12, 14).
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: December 14, 2004
    Assignee: Railroad Transportation Communication Technologies (RTCT) LLC
    Inventors: Henry B. Lewin, Alfred D. Granite