EP 1538578 A1 20050608 - Device for sensing ambient light intensity variation
Title (en)
Device for sensing ambient light intensity variation
Title (de)
Vorrichtung für die Detektierung der ambienten Lichtintensitätveränderung
Title (fr)
Dispositif pour détecter la variation de l'intensité de la lumière ambiante
Publication
Application
Priority
IT MI20032386 A 20031205
Abstract (en)
A device (100) for sensing ambient light intensity variation, comprising processing and control means (1), light sensing means (3) connected to the processing and control means (1), and memory means (2) adapted to store an identification code; its peculiarity consists in that it further comprises wireless transmission means (4) adapted to transmit the identification code following a variation in ambient light intensity sensed by the light sensing means (3). <IMAGE>
IPC 1-7
IPC 8 full level
G08B 13/14 (2006.01); G08B 13/189 (2006.01)
CPC (source: EP)
G08B 13/1481 (2013.01); G08B 13/1895 (2013.01)
Citation (search report)
- [XY] US 5936523 A 19990810 - WEST JOE F [US]
- [Y] GB 2313980 A 19971210 - YALE SECURITY PROD LTD [GB]
- [Y] EP 1067496 A2 20010110 - WATCHMAN TECHNICAL PRODUCTS IN [CA]
- [Y] US 4122445 A 19781024 - ORITA KOHJI
- [Y] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04028609 A 20041202; IT MI20032386 A 20031205