Non-contact key

Details Non-contact key Non-contact key

1997-04-02

1999-07-13

Paladini, Albert W.

Electrical transmission or interconnection systems

Electromagnet or highly inductive systems

307116, 257428, 340551, 340552, 361179, G01V 308

Patent

active

059231017

ABSTRACT:
A non-contact switch movs from an off position to an on position when a lossy material enters a sensitive area of the switch. The non-contact switch comprises a transmitting element and a sensing element. The transmitting element is capable of radiating a signal. A portion of the signal passes through the sensitive area of the switch. The sensing element is capable of receiving the signal. When the received signal is less than a predetermined level, the received signal represents the lossy material entering the sensitive area of the switch.

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