Dusk delay system for outdoor motion detection
US5442177A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Sep 6, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dusk delay system for outdoor motion detection provides the benefits of dusk to dawn, timed, and motion detection control. A dusk to dawn type sensor detects the onset of darkness and turns on the lights for a predetermined duration of time. Once the duration of time expires, the lights will be shut off. Subsequently, motion within the monitored area will be detected by a motion detector and cause the light to be turned on for a selectably predetermined amount of time. The timer can randomize the actual time in which the lighting controller shuts off the light and goes into the motion detection mode. A latch mechanism disables the operation of the system upon momentary interruption of the power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.