Patents by Inventor Alfred D. Gronner

Alfred D. Gronner 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).

  • Current transformer input system for AC conversion devices
    Patent number: 4270061
    Abstract: An improved input system for isolating resolver or synchro outputs from inputs to demodulators or analog-to-digital converters uses current transformers rather than voltage transformers. The resistances of resistors connected in series with the primary windings of the isolation transformers are adjusted to standardize the input currents of the transformers.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: May 26, 1981
    Assignee: The Singer Company
    Inventors: Alfred D. Gronner, David J. Simon