Method and apparatus for detecting entry
US5386210A · kind A · utility
96Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Jul 19, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.