Device for controlling a driven movement element, particularly a door or a gate
US8737680B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2012 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Nov 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2209/823
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device for controlling a driven movement element with an electronic unit is proposed, which comprises a transmitter for electromagnetic radiation, for example, light, in particular infrared light, and a receiver for electromagnetic radiation emitted by a transmitter for the detection of objects on a propagation path between transmitter and receiver. According to the invention, the electronic unit is designed to detect a temporal change in at least one feature derived from the received electromagnetic radiation and, upon a detection of a change in the at least one feature that is comparatively slow over time, to output a signal that is associated with a detection of smoke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.