Patents Assigned to Coberly & Associates
  • Constant intensity light source
    Patent number: 4190795
    Abstract: A power apparatus to maintain a lamp at constant intensity by varying power to the lamp in response to changes in the voltage across a light sensing element. That voltage is automatically compared to a preset reference voltage and the output to the lamp is varied such that any difference in those voltages is eliminated.
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: February 26, 1980
    Assignee: Coberly & Associates
    Inventor: Stephen M. Schultheis