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Ergonomic keyboard entry system

  • US 5,790,103 A
  • Filed: 10/04/1995
  • Issued: 08/04/1998
  • Est. Priority Date: 10/04/1995
  • Status: Expired due to Fees
First Claim
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1. An ergonomic keyboard entry system, comprising:

  • a longitudinally extended base;

    a plurality of multifunction character keys coupled to said base, said plurality of multifunction character keys including a set of six or less first multifunction character keys, five of said set of first multifunction character keys being irregularly arranged on said base to be located under finger tips of a first bent human hand, said irregular arrangement of said five first multifunction character keys being disposed about a first axis extending at a first predetermined angle with respect to said longitudinal direction, each of said set of first multifunction character keys being operative to generate an alphabetic character output function; and

    ,a plurality of control keys coupled to said base, said plurality of control keys including a set of five or less first control keys irregularly arranged on said base to be located under finger tips of a second bent human hand, said irregular arrangement of said set of first control keys being disposed about a second axis extending at a second predetermined angle with respect to said longitudinal direction, each of said set of first control keys being operative to generate a predetermined assignment of output functions to said plurality of multifunction character keys, each of said plurality of multifunction character keys designates a base character output function responsive to an absence of simultaneous operation of any of said set of first control keys, at least a portion of said plurality of multifunction character keys designate at least four alternate character output functions responsive to operation of a respective one of said first control keys simultaneous therewith for each said alternate character output function, each of said set of first control keys having an indicia indication disposed at a predetermined position thereon, said predetermined position being different for each of said set of first control keys.

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