Controlled switching circuit

Details Controlled switching circuit Controlled switching circuit

1988-06-22

1990-03-06

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural load circuit systems

307117, 324236, 340567, H02J 100, H01H 3500, G01N 2772

Patent

active

049068580

ABSTRACT:
A controlled electronic switching circuit having a plurality of switches for switching external load circuits at least one of which provides electrical power for the control arrangement and there being at least one switch electrically isolated from the control arrangement. The circuitry, operated as a proximity switch, can be arranged to distinguish between the proximity of ferromagnetic and non-ferromagnetic material objects using a metal layer between the proximity sensing circuit and the object, which layer can be a deposited metal film.

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