Proximity detecting apparatus

Details Proximity detecting apparatus Proximity detecting apparatus

1974-01-21

1977-06-14

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307308, 340258C, 331 65, G01V 310

Patent

active

040300374

ABSTRACT:
A compact and low-cost apparatus for detecting the proximity of a human body and generating a corresponding electrical signal is disclosed which apparatus includes an oscillator and an operational amplifier. Under normal conditions, equal input voltages are applied to the input terminals of the operational amplifier, whereas the equilibrium of the input voltages is lost by the approach of a human body to the apparatus.

REFERENCES:
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patent: 3199033 (1965-08-01), Atkins et al.
patent: 3314066 (1967-04-01), Schwartz et al.
patent: 3515984 (1970-06-01), King et al.
patent: 3517326 (1970-06-01), Roesch
patent: 3553575 (1971-01-01), Shea
patent: 3600606 (1971-08-01), Clor
patent: 3634843 (1972-01-01), Corris
patent: 3732443 (1973-05-01), Lovrenich
patent: 3753140 (1973-08-01), Feistel
patent: 3896371 (1975-07-01), Hametta

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