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Medical instrument having a switch for controlling an external device

  • US 5,324,283 A
  • Filed: 06/01/1992
  • Issued: 06/28/1994
  • Est. Priority Date: 07/03/1991
  • Status: Expired due to Fees
First Claim
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1. A medical instrument having a switch for controlling the operation of an external device which can be switched on and off, comprising a light transmitting section which extends into the instrument, the switch being adapted to alter the transmission of light through the light transmitting section at least for the purpose of switching an external device on and off, said light transmitting section comprising optical fibers, having first ends in the medical instrument, which ends are disposed opposite to each other in spaced relationship, one of the fibers having a second end from which light is transmitted to the first end thereof, and the other optical fiber having a second end to which light is transmitted from the first end thereof, a cover plate being displaceable by means of the switch, between said first ends of the fibers to vary the transmission of light through the fibers, said cover plate comprising regions allowing the transmission of different quantities of light.

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