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Configuration for identifying a switch position of a power switch

  • US 20010039626A1
  • Filed: 05/08/2001
  • Published: 11/08/2001
  • Est. Priority Date: 05/08/2000
  • Status: Active Grant
First Claim
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1. In combination with a microprocessor-controlled appliance operating with a switch-off delay, a configuration for identifying a switch position, comprising:

  • a power switch having given switch positions and including a first switch and a second switch, said first switch being connected in series with said second switch;

    said first switch and said second switch selectively opening and closing only jointly;

    a sensor having a first input, a second input, and an output;

    said second input of said sensor to be connected to a first conductor selected from the group consisting of a first live conductor, a second live conductor, and a neutral conductor;

    said second switch having a first contact and a second contact, said first contact to be connected to a second conductor selected from the group consisting of the first live conductor, the second live conductor, and the neutral conductor;

    said second contact of said second switch being connected to said first input of said sensor for passing a measurement current to said first input of said sensor when a voltage is applied and said power switch is switched on; and

    a microprocessor operatively connected to said sensor, said output of said sensor transmitting an output signal corresponding to one of the given switch positions of said power switch to said microprocessor.

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