Patents by Inventor Scott W. McCrea

Scott W. McCrea 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).

  • Universal battery charger
    Patent number: 5214369
    Abstract: A battery charger having an input receptacle, and different AC electrical cords pluggable therein for adapting the charger to a variety of different AC distribution systems. Portions of rectified signals are coupled by a triggerable switching device to a battery to be charged. The switching device is triggered only on a negative slope portion of the rectified signal, at a specified rectified signal amplitude, only when a battery is connected to the charger, and when the battery indeed requires charging.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: May 25, 1993
    Assignee: The Charles Machine Works, Inc.
    Inventor: Scott W. McCrea