Protection device
US9495856B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Feb 21, 2012 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Feb 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/1481
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to a device for securing objects against unauthorized removal. To this aim, the device (26) comprises an alarm electronics unit (1) having a motion sensor (3), an environmental brightness sensor (4), and an alarm signal transmitter (5). The alarm electronics unit (1) is designed so that the ambient brightness sensor (4) is activated by the detection of a movement. However, alarm release occurs only if the ambient brightness measured at the ambient brightness sensor (4) exceeds a predetermined brightness threshold, and the movement last continuously for a predetermined time span. The alarm activation occurs only if the ambient brightness falls below a predetermined darkness threshold and the movement continues to persist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.