Patents by Inventor Water Hirschmann

Water Hirschmann 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).

  • Power network fluorescent lamp operating circuit
    Patent number: 4775822
    Abstract: To operate a fluorescent lamp having a lamp operating voltage of to about 0 V from a power supply having a nominal voltage level below lamp operating voltage, and without use of a voltage doubler circuit or a transformer to increase the power supply voltage, the power supply voltage is rectified, chopped, and then applied to the fluorescent lamp through a voltage increasing circuit which is formed as an LC resonance circuit. The inductive component can be formed by the current limiting choke, already present in a typical fluorescent lamp circuit, and the capacitative component by a small capacitor, for example of 6 nF value, connected to the choke to form a series resonance circuit.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: October 4, 1988
    Assignee: Patent-Treuhand Gesellschaft fur Elektrische Gluhlampen GmbH
    Inventors: Eugen Statnic, Wolfgang Tausch, Water Hirschmann