Patents by Inventor Robert C. Devy

Robert C. Devy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fail-safe cab signal process for transmitting information by high-voltage pulsed track circuits, and apparatus for carrying the process into effect
    Patent number: 4081160
    Abstract: A method and apparatus is provided for communicating information in the form of plural items of data between a first station and a rail vehicle by transmission of pulses at predetermined repetition rates along railway tracks including a transmitting station for generating the information pulses having control apparatus receiving a particular data item as an input for selecting a repetition rate to represent the data item for transmission and generating apparatus connected to the control apparatus for generating the information pulses. The information pulses are coupled to railway tracks which transmit the generated information. A receiving station receives the information pulses from the tracks and includes sensing apparatus for sensing the information pulses and apparatus for removing interference signals received along with the information pulses, the interference signals being attributable to a number of causes which include unbalanced traction return currents and/or transmission interference.
    Type: Grant
    Filed: September 28, 1976
    Date of Patent: March 28, 1978
    Assignee: Jeumont-Schneider
    Inventors: Robert C. Devy, Jean P. Salmon