Patents by Inventor Douglas John Greenland

Douglas John Greenland has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Safe and reliable power supply for xenon arc lamp
    Patent number: 6181077
    Abstract: A power supply for a xenon arc lamp that will automatically shut down if the lamp current is too high, the lamp voltage is too high, or the lamp requires too many trigger pulses to ignite it. Such conditions indicate faults in the lamp itself and should not be operated this way for safety. Lamp-on and end-of-lamp-life indications are provided to the operator for maintenance. The cooling fan power supply must be normal or the lamp will be shut off or not started. In combination, such provide a lamp system that can safely operate at very high powers.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: January 30, 2001
    Assignee: EG&G ILC Technology, Inc.
    Inventor: Douglas John Greenland