Passive infrared intrusion detector
First Claim
Patent Images
1. An infrared intrusion detector, for mounting within a wall, and arranged to resemble an electrical outlet, comprising:
- an enclosure for insertion into an opening in said wall;
a cover plate for mounting to said enclosure, said cover plate having first and second apertures formed therein, said apertures resembling corresponding apertures in an electrical outlet cover plate;
an infrared radiation detector, mounted in said enclosure adjacent said first aperture;
a first light source, mounted within said enclosure adjacent said second aperture; and
a lens unit, for mounting between said enclosure and said cover plate, said lens unit including a first lens, for focusing infrared radiation from a region of space and passing through said first aperture onto said detector and a second lens, for focusing light emitted by said light source into a light beam corresponding to said region of space.
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Accused Products
Abstract
A passive infrared intrusion detector is configured to resemble an electrical wall outlet. The unit includes a light for visually indicating the direction of its beam of sensitivity, and a lens unit which facilitates directional adjustment of the beam.
20 Citations
19 Claims
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1. An infrared intrusion detector, for mounting within a wall, and arranged to resemble an electrical outlet, comprising:
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an enclosure for insertion into an opening in said wall; a cover plate for mounting to said enclosure, said cover plate having first and second apertures formed therein, said apertures resembling corresponding apertures in an electrical outlet cover plate; an infrared radiation detector, mounted in said enclosure adjacent said first aperture; a first light source, mounted within said enclosure adjacent said second aperture; and a lens unit, for mounting between said enclosure and said cover plate, said lens unit including a first lens, for focusing infrared radiation from a region of space and passing through said first aperture onto said detector and a second lens, for focusing light emitted by said light source into a light beam corresponding to said region of space. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. In an infrared intrusion sensor having an enclosure, an infrared detector in said enclosure, an aperture on said enclosure for passing infrared radiation to said detector and a lens element arranged in said aperture, the improvement wherein said lens element includes a notched slot and said enclosure includes a projecting member for engaging said slot, said slot having a plurality of notches spaced at discrete positions along said slot for selectively engaging said projecting member thereby to mount said lens element to said enclosure at a plurality of discrete lens positions.
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12. A wall mounted infrared intrusion sensor, comprising:
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a substantially rectangular enclosure having a rear wall, two side walls, a top wall, a bottom wall and a front opening; an infrared detector within said enclosure; a lens unit for mounting over said front opening for focusing infrared radiation passing through said opening onto said detector; a first printed circuit board, mounted to said rear wall substantially parallel thereto; first and second slots arranged opposite each other in said side walls and extending parallel to said bottom wall in proximity thereto; a second printed circuit board mounted in said slots parallel to said bottom wall; circuit wires interconnecting said first and second printed circuit boards adjacent the intersection of said rear wall and said bottom wall; and means on said second printed circuit board, adjacent said aperture, for connecting said sensor to an alarm circuit. - View Dependent Claims (13, 14, 15)
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16. An intrusion detector for mounting within a wall, and arranged to resemble an electrical outlet, comprising:
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an enclosure for insertion into said wall, said enclosure having a rear wall, first and second sidewalls, a top wall, a bottom wall and a front opening; a cover plate, for mounting to said enclosure over said opening, said cover plate having first and second apertures formed therein; a first printed circuit board, mounted parallel and adjacent to said rear wall in said enclosure, said first printed circuit board having mounted thereon an infrared detector, opposite said first aperture, and a first light source, opposite said second aperture; a second printed ciricuit board, mounted parallel and adjacent to said bottom wall in said enclosure, said second board being connected to said first board by jumper wires, and said second board having mounted thereon an alarm indicator light, to be illuminated in response to detection of an object by said detector, and means for connecting said intrusion detector to an alarm system; and a lens unit, mounted between said enclosure and said cover plate, said lens unit having a first lens for focusing infrared radiation onto said detector unit, a second lens for focusing light from said first light source and an area for passing light from said alarm indicator light. - View Dependent Claims (17, 18, 19)
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Specification