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Combination mouse and track ball unit

  • US 5,287,090 A
  • Filed: 09/30/1992
  • Issued: 02/15/1994
  • Est. Priority Date: 09/30/1992
  • Status: Expired due to Term
First Claim
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1. A cursor control unit comprising:

  • a shell,a roller ball rotatably mounted in said shell, said roller ball extending through two openings in said shell, andshift means for elevating and lowering said shell so that said shell is usable as a mouse in a first position of said shift means and said shell is usable as a track ball in a second position of said shift means,two pickup sensors in contact with said roller ball with one of said two pickup sensors being movable,said one pickup sensor being movable between a first position for use of the shell as a track ball, a second position for use of the shell as a mouse with left-handed operators, and a third position for use of the shell as a mouse with right-handed operators.

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