Patents Assigned to Trio Engineering Inc.
  • Multi-bulb light source
    Patent number: 4821154
    Abstract: A light source for use in traffic signals has a plurality of light bulbs, in which each bulb is used in turn until it burns out, at which time power is switched to an operable bulb. By means of lenses and mirrors in the light source, a substantially identical pattern of light rays is produced regardless of which bulb is lit.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: April 11, 1989
    Assignee: Trio Engineering Inc.
    Inventors: Ireneusz J. Kotecki, Slawomir Patocki