Patents Examined by Philip H. Lung
  • Patent number: 4833288
    Abstract: Induction-heated hob or cookplate has a glass-ceramic transparent top plate, one or more inductor coils below the top plate, and a support plate that has cutout or cutouts in which the inductor coil or coils are situated. The inductor coil or coils is in the form of a spiral or flat winding or a square or rectangular flat winding. A converter receives household power (e.g. 220 v, 60 Hz) and provides an alternating current of suitable frequency (e.g. 25 KHz to 30 KHz) to the inductor coils. Between the support plate and the top plate there is an intermediate complex composed, e.g., of a mica sheet and a glass fabric sheet. Markings or decoration are disposed on the underside of the top plate or on the glass fabric sheet, where they are clearly visible through the transparent top plate, but are not subject to abrasion from cooking utensils or scrubbing.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: May 23, 1989
    Assignee: Cableco
    Inventor: Michel Poumey