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Circular tactile keypad

  • US 5,479,163 A
  • Filed: 08/04/1994
  • Issued: 12/26/1995
  • Est. Priority Date: 08/04/1994
  • Status: Expired due to Term
First Claim
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1. A digital keypad, comprising:

  • a controller for signalling an electrical device;

    a keypad on said controller;

    a plurality of manually-operated key switches on a face of said keypad, said switches including switches marked with indicia 1-9 located about the circumference of a circle in clock-face arrangement, being radially spaced 30-degrees apart, and having the indicia "6" at the bottom of said circle; and

    a plurality of fixed ridges on the face of said keypad, each ridge being elongate and located along a radius from the center of said circle to one of said switches.

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