Patents Assigned to Establissements Jean Charvet
  • Patent number: 4996405
    Abstract: A portable electric hotplate is heated by an inductive heating power source having a glass ceramic plate and a primary induction coil. The hotplate has an outer heat conductive casing, the top of which forms a hotplate and the base of which is made from a dielectric material. The top surface of the hotplate is heated by an electrical resistor embedded therein adjacent the top surface, which resistor is connector to a secondary inductive circuit mounted adjacent the dielectric base of the hotplate. The hotplate secondary circuit has an induction coil which serves as the secondary for the electromagnetic field emitted by the primary induction coil in the heating power source. The secondary coil is connected in parallel with a capacitor and the two are connected in series to the electrical resistor embedded in the top surface of the hotplate.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: February 26, 1991
    Assignees: Cableco, Establissements Jean Charvet
    Inventors: Michel Poumey, Jacques Charvet