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Telephone keypad with multidirectional keys

  • US 9,141,201 B2
  • Filed: 01/08/2014
  • Issued: 09/22/2015
  • Est. Priority Date: 07/27/2005
  • Status: Expired due to Fees
First Claim
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1. An optical switch with positional detection, comprising in combination:

  • an optical switch having a switch base;

    a key cap adjoined to a key stem having a centerline perpendicular to said switch base through the center of said key stem;

    said key stem is configured to move laterally to said switch base;

    at least one emitter and at least one detector bi-lateral to said centerline;

    said at least one emitter to emit an emitted beam directed to said key stem;

    said at least one detector to detect said directed beam;

    a surface on said key stem to attenuate said directed beam when lateral applied pressure is applied to said key stem; and

    wherein the amount of said lateral applied pressure of said key stem produces an output from said optical switch including at least said lateral applied pressure.

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