Patents by Inventor Edgar S. R. Cockram

Edgar S. R. Cockram 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).

  • Ignition device for a gas discharge lamp
    Patent number: 5004960
    Abstract: The invention provides an ignition device for a gas discharge lamp. The device comprises a voltage multiplier which is connected to an AC mains source. A pulse generator is connected to the voltage multiplier and produces a trigger pulse when the source voltage exceeds a predetermined threshold. The output of the pulse generator is applied to a resonant network including a step-up transformer, which applies high voltage ignition pulses to the lamp. A delay circuit synchronizes the ignition pulses with the peaks of the AC mains waveform.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: April 2, 1991
    Assignee: Actronic Lighting CC
    Inventors: David J. Cockram, Edgar S. R. Cockram