Proximity switch for lighting devices

Illumination – Supports – Special switch operator

Patent

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Details

307116, 361179, F21V 2304

Patent

active

057161291

ABSTRACT:
A proximity switch for controlling lighting devices includes an oscillator operating at a nominal frequency. When a hand is positioned near a sensing antenna, the frequency of the oscillator decreases. The decrease in frequency is detected by a detection circuit which toggles a flip-flop. The output of the flip-flop controls a trigger circuit which provides a trigger input to a triac. When the trigger circuit is active, the triac conducts and provides power to an incandescent lamp. The power is alternatively toggled on and off each time the hand is brought into proximity to the sensing antenna.

REFERENCES:
patent: 4119864 (1978-10-01), Petrizio
patent: 4152629 (1979-05-01), Raupp
patent: 4213061 (1980-07-01), Conner
patent: 4237386 (1980-12-01), Instance
patent: 4246494 (1981-01-01), Foreman et al.
patent: 4246533 (1981-01-01), Chiang
patent: 4250432 (1981-02-01), Kohler
patent: 4264831 (1981-04-01), Wern
patent: 4293745 (1981-10-01), Matsuda et al.
patent: 4321479 (1982-03-01), Ledniczki et al.
patent: 4360737 (1982-11-01), Leopold
patent: 4468573 (1984-08-01), Hehl
patent: 4490625 (1984-12-01), Dilly
patent: 4558261 (1985-12-01), Cheng
patent: 4668876 (1987-05-01), Skarman
patent: 4672229 (1987-06-01), Skarman et al.
patent: 4723080 (1988-02-01), Cline et al.
patent: 5010460 (1991-04-01), Lin
LSI Computer Systems, Inc. LS7237, "Tough Sensitive Light Dimmer/Switch", Nov. 1983, pp. 1-4.
LSI Computer Systems, Inc. S7231-LS7235, "Touch Sensitive Light Dimmer/Switch", Dec. 1983, pp. 1-6.
"Electronic Light Dimmer, Electronic Light Switch", S567 A,B,C; S576 D, pp. 1-10, Siemans Corporation, Mar. 1982.

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