Patents Assigned to Ackeret Design & Engineering
  • Optical numerical segment display
    Patent number: 4214391
    Abstract: An optical display presenting a display field at least one digit in a seven segment arrangement, a stack of seven plate elements for each digit and arranged in a stack, a single light source directing light into the light inlet ends of all of the seven plates, a movable shutter element wth transparent and opaque areas movable across the light source and light inlets of the plates, each plate having a chamfered edge portion remote from the light inlet end and reflecting light transversely of the plate and onto the display field.
    Type: Grant
    Filed: February 13, 1978
    Date of Patent: July 29, 1980
    Assignee: Ackeret Design & Engineering
    Inventor: Walter Angst
  • Scale
    Patent number: D253523
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: November 27, 1979
    Assignee: Ackeret Design & Engineering
    Inventor: Peter Ackeret
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    Patent number: D253524
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: November 27, 1979
    Assignee: Ackeret Design & Engineering
    Inventor: Peter Ackeret