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Safety switching apparatus

  • US 20050205767A1
  • Filed: 05/24/2005
  • Published: 09/22/2005
  • Est. Priority Date: 01/23/2002
  • Status: Abandoned Application
First Claim
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1. An optical waveguide for safety switching apparatus controlled by changes in the intensity of light passing through the optical wave guide comprising:

  • a crystal-clear silicon gel light-guiding core having a refraction coefficient and a hose shaped outer wall of crystal-clear elastomeric thermoplastic material encompassing said light-guiding core, said outer wall having a lower refraction coefficient than said light-guiding core and said light-guiding core and said outer wall being flexible thereby permitting flexing of said wave guide to change the intensity of light passing through said waveguide.

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