Magnetic Patents (Class 246/265)
  • Patent number: 5806810
    Abstract: A railroad frog assembly is provided with a switched magnet that immediately retains a frog flexible wing rail in its open position in response to a railcar wheel passing through the frog assembly, and that delayably releases the frog flexible wing rail from its open position for subsequent closure by an included frog compression spring.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: September 15, 1998
    Assignee: ABC Rail Products Corporation
    Inventors: Kieth Young, Stephen R. Kuhn
  • Patent number: 4924776
    Abstract: A switch for a floor transportation system is described, whereby a guide rail is provided below the floor level. A guide pin extends into this guide rail. In front of this guide pin, a guide shoe of ferromagnetic material is pivotally provided. In the area of the switch, the side walls of the guide rail are provided with electromagnets which pull the guide shoe toward the one or the other wall area so that the guide shoe and the guide pin can be directed into one or the other branch rail of a guide rail fork.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: May 15, 1990
    Inventor: Georg Uttscheid