Stub Patents (Class 246/445)
  • Patent number: 5193767
    Abstract: A switch track apparatus for a girder type track comprises a movable girder composed of at least one girder portion shiftable between a plurality of positions on a fixed supporting member and of at least one drive device for driving the movable girder. The drive device is supported on a side surface of the movable girder substantially within a thickness of the movable girder.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: March 16, 1993
    Assignee: HSST Corporation
    Inventor: Kiyoshi Mihirogi
  • Patent number: 4534527
    Abstract: An improved railroad stub switch is described in which the axial rail tension or compression forces due to temperature fluctuations are transmitted through the switch by means of radius arms connected to both the switch and fixed rails, thereby eliminating the need for expensive expansion joints at the switch. In a preferred embodiment, interlocking point shoes are also employed so as to hold the butt ends in vertical and horizontal register and transmit a signal to the trailing side rail of the impending approach of a load from the approach side rail, thereby reducing batter on the trailing side rail.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: August 13, 1985
    Assignee: Canadian Patents & Development Limited
    Inventors: Lawrence A. J. van Eyken, Semion Perlin