Patents Assigned to Gelcore Company
  • Method and device to emulate a railway searchlight signal with light emitting diodes
    Patent number: 6642666
    Abstract: A railway searchlight signal uses a printed circuit board populated by three arrays (green, red and yellow) of LEDs. The LEDs are lit by a standard color light power supply unit (PSU). As only one array of LEDs is lit at a time, an interface between the PSU and the LEDs is provided to select which LED array to couple with the PSU. External repeater contacts provide information on which aspect is displayed. This searchlight system design is failsafe in that no single failure of a component will produce a less restrictive aspect.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: November 4, 2003
    Assignee: Gelcore Company
    Inventor: Nicolas St-Germain