Patents by Inventor Hartmut K. Gehm

Hartmut K. Gehm 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).

  • Patent number: 4034280
    Abstract: Disclosed is a multiple output DC-to-DC converter. The DC input power is filtered and passed through a chopper preregulator. The chopper output is then passed through a current source inverter controlled by a squarewave generator. The resultant AC is passed through the primary winding of a transformer, with high voltages induced in a plurality of secondary windings. The high voltage secondary outputs are each solid-state rectified for passage to individual output loads. Multiple feedback loops control the operation of the chopper preregulator, one being responsive to the current through the primary winding and another responsive to the DC voltage level at a selected output.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: July 5, 1977
    Assignee: TRW Inc.
    Inventors: Donald L. Cronin, Bertrand F. Farber, Hartmut K. Gehm, Daniel S. Goldin