Method and apparatus for detecting entry

Details Method and apparatus for detecting entry Method and apparatus for detecting entry

1993-07-19

1995-01-31

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

250342, 340522, G08B 1318

Patent

active

053862104

ABSTRACT:
A sensing apparatus and method for use in an illumination control monitoring of a particular area. The sensing apparatus includes selectable and independent triggering and retriggering modes for activating and deactivating a lamp. Three sensors, a PIR, a sound and a light sensor cooperatively interact to cause triggering upon detecting motion in a low ambient light room. Thereafter, retriggering results upon either motion or sound being periodically detected in the room. An absence of motion or sound within a predetermined duration results in deactivation of the light and a return to a pre-triggering configuration.

REFERENCES:
patent: 4703171 (1987-10-01), Kahl et al.
patent: 4890093 (1989-12-01), Allison et al.
patent: 4975584 (1990-12-01), Benjamin et al.
patent: 5015994 (1991-05-01), Hoberman et al.
patent: 5142199 (1992-08-01), Elwell
patent: 5189393 (1993-02-01), Hu

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