Inductive proximity switch with a one-piece housing

Details Inductive proximity switch with a one-piece housing Inductive proximity switch with a one-piece housing

1999-02-03

2000-10-17

Jackson, Stephen W.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

32420716, H02B 124

Patent

active

061336548

ABSTRACT:
An inductive proximity switch is provided which comprises a coil, means for supplying the coil with periodic transmitting current pulses, and means for processing signals which correspond to voltages induced in said coil after the end of a transmitting current pulse by the decaying current which previously flows in the detected body due to the voltage induced therein by the transmitting current pulse. In order to improve the robustness of the proximity switch so that it is suitable for durable use in an aggressive environment, the coil, the means for supplying the coil with a periodical transmitting current, and the signal processing means are arranged in a cylindrical housing which is closed on the side of the active surface of the proximity switch and consists of a metal which is not ferromagnetic and whose specific electric resistance is relatively high.

REFERENCES:
patent: 5285154 (1994-02-01), Burreson
patent: 5498958 (1996-03-01), Tu et al.
An English language abstract of German Patent No. DE 195 16 934 C1, (Aug. 1996).
An English language abstract of German Patent No. DE 39 34 593 A1, (Apr. 1991).

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