Lens blind feature for motion detector

Details Lens blind feature for motion detector Lens blind feature for motion detector

2006-01-17

2006-01-17

Porta, David (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

06987267

ABSTRACT:
A light fixture has motion detection circuitry enclosed within a motion detector housing. The motion detector housing contains at least one thermal detector such as a passive infrared sensor, the sensor having a detection angle. At least one adjustable blind is housed within the housing adjacent to the infrared sensor, and the blind is adjustable to block and limit the detection angle of the sensor. The blind may be directly connected to a knob on a control panel that allows the user to alter the angle of the blind. Two or more blinds may be used on the interior of the housing, to increase adjustability of the detection angle.

REFERENCES:
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patent: 4960995 (1990-10-01), Neumann et al.
patent: 5434764 (1995-07-01), Lee et al.
patent: 5442532 (1995-08-01), Boulos et al.
patent: 5626417 (1997-05-01), McCavit
patent: 6323488 (2001-11-01), McCavit et al.
patent: 6346705 (2002-02-01), Lee et al.
patent: 6348691 (2002-02-01), Sandell et al.

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