Wall mountable modular snap-together passive infrared detector assembly
US4486661A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1982 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Jun 21, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.