Patents Assigned to Centralab Inc.
  • Patent number: 4463234
    Abstract: A switch is disclosed having an insulating substrate with a first contact, a spacer layer with a hole aligned with the contacts, a flexible membrane with second contacts aligned with the hole and first contact, the membrane having a raised area of controlled thickness aligned with the second contact forming a force actuator, a dome enclosure with circular pockets for locating snap domes aligned with the raised area of the membrane, an overlay with cut out portions corresponding, to the snap domes and an overlay with graphic indicia covering the assembly.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: July 31, 1984
    Assignee: Centralab Inc.
    Inventor: William W. Bennewitz