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A capacitive proximity switch which may be used as an actuating device for a variety of control applications, such as windshield wipers and door locks. According to the invention, the actuating element a contact or proximity switch to be actuated in a nonmechanical manner, and a sensor provided on a

A capacitive proximity switch which may be used as an actuating device for a variety of control applications, such as windshield wipers and door locks. According to the invention, the actuating element a contact or proximity switch to be actuated in a nonmechanical manner, and a sensor provided on an object being made as part of a capacitive proximity switch, specifically as an operating electrode of the capacitive proximity switch.

대표청구항 ▼

[ What is claimed is:] [1.] A capacitive proximity switch circuit, comprising:a reference electrode;an operating electrode;a changeover contact having an input electrically connected to said operating electrode, said changeover contact being controlled by a clock generator and having a first and sec

[ What is claimed is:] [1.] A capacitive proximity switch circuit, comprising:a reference electrode;an operating electrode;a changeover contact having an input electrically connected to said operating electrode, said changeover contact being controlled by a clock generator and having a first and second output, the second output of said changeover contact being connected to a frame potential; anda storage capacitance electrically connected via a charging resistor connected to a power supply voltage and via a discharging resistor to a first output of said changeover contact, said storage capacitance being further connected to said frame potential;wherein the circuit switches only when the capacitance between said operating electrode and said reference electrode changes at a rate which is greater than a stipulated lower boundary value.