Patents by Inventor Bernard Chappel

Bernard Chappel 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).

  • Electric transformer for microwave ovens
    Patent number: 4812798
    Abstract: The invention provides an electric transformer for microwave ovens including a conventional magnetic circuit with three columns, and electric circuits insulated by carcases and covers made from an insulating material. The secondary carcase forms a particular housing for the secondary heating winding so that the secondary high voltage winding and the secondary heating winding are partially superimposed. Thus an excellent electric insulation is provided without loss of space.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: March 14, 1989
    Assignee: Societe Pour L'Application De L'Optique et de L'Electronique a la Recherche et a L'Automatisation Optelec
    Inventor: Bernard Chappel