Patents by Inventor Frederick M. Urban

Frederick M. Urban 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).

  • Control system for even lighting of surface elements in a glass cook top
    Patent number: 5652503
    Abstract: A triac-based electronic control system (20) for an electrical appliance which alternately applies and disrupts power in full cycles or full half cycles. Each zero crossing in a wave cycle is detected and this information is input into a microprocessor (U1) along with a user selected power level. The microprocessor outputs a triac control signal (36) to alternately turn ON and turn OFF power to a heater element (22) to produce a duty cycle used to achieve the desired heating level.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: July 29, 1997
    Assignee: Eaton Corporation
    Inventors: Frederick M. Urban, Robert J. Alvord