Patents Assigned to Bernz-O-Matic Corporation
  • Smoke detector and alarm
    Patent number: 3936814
    Abstract: A smoke detector and alarm utilizing two photo resistors, one of which is used to detect smoke in an enclosed chamber and the other of which is used to compensate for line voltage variations and the effect of such variations on the smoke detecting photo resistor, and to supervise or monitor the light source so as to detect and signal light source failure in a distinct way.
    Type: Grant
    Filed: April 29, 1974
    Date of Patent: February 3, 1976
    Assignee: Bernz-O-Matic Corporation
    Inventors: Otto Muller-Girard, Chester W. Bray