Proximity switch

Details Proximity switch Proximity switch

1992-07-14

1995-06-27

Stephan, Steven L.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

331 65, G01N 2700

Patent

active

054282535

ABSTRACT:
A high frequency oscillation type proximity switch prevents mutual interference when it is mounted adjacent to other proximity switches. The switch includes a comparator having a threshold value at a level higher than an object detection level of the oscillation output of the proximity switch. When an output is continuously obtained from the comparator, a beat is generated and the generation of mutual interference is detected. Then, the generation is externally displayed, and mutual interference is alarmed and prevented by changing the oscillation frequency.

REFERENCES:
patent: 3870948 (1975-03-01), Holt et al.
patent: 4219740 (1980-08-01), Little
patent: 4521748 (1985-06-01), Ryczek et al.
patent: 5025227 (1991-06-01), Walton
patent: 5034704 (1991-07-01), Tomioka et al.

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