Patents by Inventor S. R. Murthy Vamaraju

S. R. Murthy Vamaraju 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).

  • Constant frequency alternator
    Patent number: 4305001
    Abstract: A double induction dynamo electric machine of the exciter-generator type provides an AC electrical output that has a substantially constant frequency characteristic by using a closed frequency loop arrangement without requiring electronic controls or, in most instances, continuous application of an externally derived AC excitation signal. Moreover, the machine preferably provides such AC electrical output with a substantially constant voltage characteristic as the load current varies, without electronic voltage feedback controls.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: December 8, 1981
    Assignee: Lima Electric Company, Inc.
    Inventors: S. R. Murthy Vamaraju, Andrew F. Szippl