Patents by Inventor Gerhard Laurens Kroone

Gerhard Laurens Kroone 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 control circuit for gas discharge lamps
    Patent number: 6911778
    Abstract: The disclosure includes an ignition control circuit comprising a transformer having at its secondary side an operating winding, and at least one filament winding. In a pre-heating phase, only the filament winding, which is normally connected to the filaments of a lamp, is active. In this way, the filaments of the lamp are heated first. After a predetermined time, the secondary operating winding is switched on, by a triac. This triac is a compact component producing no or little heat. The invention provides a simple and economic ignition circuit for gas discharge lamps.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: June 28, 2005
    Assignee: Dutch Electro B.V.
    Inventor: Gerhard Laurens Kroone