Patents by Inventor Edward P. Waszkiewicz

Edward P. Waszkiewicz 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).

  • Lamp dimmer circuit utilizing opto-isolators
    Patent number: 4395660
    Abstract: A solid-state dimmer control circuit using opto-isolators, whereby the effective power to be supplied to a load is selectively varied. The opto-isolators couple a variable pulse switching circuit to a full-wave switching circuit which includes back-to-back silicon-controlled rectifiers. The variable pulse switching circuit is connected to means for generating a selectively variable control signal that is proportional to the power to be supplied to the load. A single a.c. power source is provided both switching circuits.
    Type: Grant
    Filed: December 31, 1980
    Date of Patent: July 26, 1983
    Inventor: Edward P. Waszkiewicz