Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Thomas Kuehn0
Date of Patent
April 12, 2011
Patent Application Number
11782846
Date Filed
July 25, 2007
Patent Primary Examiner
Patent abstract
The present invention relates to an inductive proximity switch with an oscillator having a resonant circuit and an amplifier and with an evaluating and control device for evaluating an impedance of the resonant circuit and for outputting a switching signal. According to the invention, the proximity switch is characterized in that a frequency measuring device is provided for measuring the oscillation frequency of the oscillator and for eliminating ambiguities of the evaluation result of the evaluating and control device. The invention also relates to a method for operating an inductive proximity switch.
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