Patents by Inventor Toy Dowdell, Jr.

Toy Dowdell, Jr. 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).

  • Alternator test apparatus and method
    Patent number: 4178546
    Abstract: An automobile alternator test apparatus tests for the presence of a failed diode by detecting a frequency component (a subharmonic component) in the alternator output ripple voltage produced by the failed diode. The subharmonic frequency component is detected by a tracking filter that is slaved to the subharmonic frequency of the ripple frequency voltage produced by the failed diode. The output signal of the slaved filter indicates the presence of the failed diode.
    Type: Grant
    Filed: January 6, 1978
    Date of Patent: December 11, 1979
    Assignee: RCA Corporation
    Inventors: Leonard R. Hulls, Toy Dowdell, Jr.