Proximity switch circuit

Details Proximity switch circuit Proximity switch circuit

1974-07-19

1976-02-03

Hayman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307235K, G08B 1326

Patent

active

039367550

ABSTRACT:
An input terminal is quiescently biased to a voltage closer to the initial threshold setting of a first comparator than to that of a second comparator. In response to the proximity of an object, an alternating voltage is induced on this terminal of an amplitude to actuate only the first comparator. Each time a comparator is actuated, a two state circuit changes the threshold settings of the comparators to bring the one formerly outside of the range of the alternating voltage to within its range and vice versa.

REFERENCES:
patent: 3255380 (1966-06-01), Atkins et al.
patent: 3564346 (1971-02-01), Atkins
patent: 3731205 (1973-05-01), Gardner
patent: 3757143 (1973-09-01), Muller

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