Two-state Hall element proximity sensor device with lamp indicat

Details Two-state Hall element proximity sensor device with lamp indicat Two-state Hall element proximity sensor device with lamp indicat

1980-02-25

1981-10-20

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

307309, 323368, 324251, 338 32H, G08B 2100, H01H 3600, H01L 4306

Patent

active

042964105

ABSTRACT:
An integrated circuit including a Hall element and a threshold detector is encased in a plastic housing with the plane of the Hall element parallel with a face of the housing, providing a two-state Hall element proximity sensor. A light emitting diode (L.E.D.) is mounted in the housing and is connected to the output of the detector, providing visual indication of the state of the sensor. A kit includes the sensor and a compatible magnet to provide to users of little skill, proximity sensor parts that are easily assembled and made immediately effective in use.

REFERENCES:
patent: 3419798 (1968-12-01), Walton
patent: 3454869 (1969-07-01), Strauss et al.
patent: 3473109 (1969-10-01), Maaz et al.
patent: 3596114 (1971-07-01), Maupin et al.
patent: 3816766 (1974-06-01), Anselmo et al.
patent: 4090091 (1978-05-01), Brown et al.
patent: 4156820 (1979-05-01), Fukuda et al.
patent: 4188605 (1980-02-01), Stout

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