The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 1984
Filed:
Jun. 21, 1982
John K Guscott, Lynnfield, MA (US);
Hugh D Dyer, Norton, MA (US);
American District Telegraph Company, New York, NY (US);
Abstract
A snap-together, passive infrared detector assembly includes a modular passive infrared detector sub-assembly defining an optical cavity. In one embodiment, the passive infrared detector sub-assembly is slidably mounted to a resilient U-shaped housing sub-assembly suitable for high wall or ceiling flush mounting. (An aesthetic cover plate is snap-locked to the U-shaped housing.) In another embodiment, the passive detector sub-assembly is mounted in a plastic housing having an aperture for high wall or ceiling surface mounting. An optical window is snap-locked onto the mouth of the optical cavity in both embodiments. Both embodiments are self-contained and fashioned substantially of a plastic material. The modular passive infrared detector sub-assembly includes an optics and an electronics module. The optics module is composed of snap-together first and second plastic mirrored members having respective arcuate metalized surfaces which define the optical cavity. The electronics module is comprised of a support member snapped to a cover member. The support and cover members have respective metalized walls which form an electromagnetically protected circuitry enclosure.