Patents Assigned to Multipoint Control Systems
  • Constant-current light-sensing system
    Patent number: 5055669
    Abstract: A constant-current light sensing system employs a constant-current diode in series with the power lead to a photoconductive cell. This diode provides a substantially fixed current through the cell and enables the system to be designed such that it can make maximum use of the linear portions of the cell's output response curve, and maximum use of the range of a potentiometer's settings. The cell used in conjunction with the system is received in a housing that is easily mountable to a wall or ceiling surface by an adhesive material.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: October 8, 1991
    Assignee: Multipoint Control Systems
    Inventors: Frederick H. Blake, C. David Long