Patents by Inventor Jon H. Grant

Jon H. Grant 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: 4020408
    Abstract: A pulse width modulated DC-to-DC power converter wherein a single ended transformer circuit includes a single switch transistor at the input and a rectifier at the output. A control circuit to the switch transistor base is powered by a drive winding on the transformer which is shunted by the primary winding of a saturable reactor. A regenerative winding opposing, and in series with, the drive winding provides the regenerative drive necessary to support oscillation of the circuit at a frequency determined by the saturation period of the saturable reactor. A resistor between the drive winding and the saturable reactor establishes both the magnitude of the drive current and the magnetizing current of the transformer. Pulse width modulation of the DC output is attained by a single, isolated DC voltage at the secondary of the saturable reactor.
    Type: Grant
    Filed: October 2, 1975
    Date of Patent: April 26, 1977
    Assignee: Etatech, Inc.
    Inventor: Jon H. Grant