Switches, Automatic Patents (Class 246/314)
  • Patent number: 7577502
    Abstract: A vital proximity detection mechanism and method for reliably determining and communicating the position of a railroad switch point relative to a normal fixed track and a reverse fixed track, wherein the mechanism includes substantial component redundancy and fault-checking features and otherwise meets promulgated safety standards for vital componentry. The mechanism includes an RF transmitter and remote status indicator unit to allow for remote adjustments of proximity sensors while monitoring the effects of such adjustments.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: August 18, 2009
    Assignee: J & A Industries, Inc.
    Inventors: William L. Henry, Stephen V. Kilgore
  • Patent number: 5451017
    Abstract: A new and improved automatic track switching control apparatus is provided for a switch assembly in a track layout for a lamp-containing model train. The automatic track switching control apparatus includes a first light sensor assembly which is supported by a base and which is located in the vicinity of a switch assembly in the track layout. The first light sensor assembly senses light emitted from a lamp on the lamp-containing model train as it approaches the switch assembly. A signal processing assembly is connected to the first light sensor assembly for receiving the electrical signal representing the approach of the lamp-containing model train to the first light sensor assembly. A switch-flipping assembly is connected to the signal processing assembly for receiving a second electrical signal for controlling switch status of the switch assembly. The signal processing assembly includes a counter assembly for counting first electrical signals provided by the first light sensor assembly.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: September 19, 1995
    Inventors: John H. Graff, Roseann Narvett