EP 1777670 A3 20070725 - Smoke detector
Title (en)
Smoke detector
Title (de)
Rauchdetektor
Title (fr)
Détecteur de fumée
Publication
Application
Priority
DE 102005050451 A 20051019
Abstract (en)
[origin: EP1777670A2] A smoke detection procedure transmits (2) a fixed clock frequency intensity modulated light signal (6) via a reflector (5) to a receiver (3) that recognises the reflected signal (7) by its clock frequency and processes it to compare its amplitude with the transmitted value and trigger an alarm or make maintenance cycle adjustments.
IPC 8 full level
G08B 17/103 (2006.01); F16P 3/14 (2006.01); G01V 8/14 (2006.01); G08B 13/184 (2006.01); G08B 29/04 (2006.01); G08B 29/24 (2006.01)
CPC (source: EP)
G08B 17/103 (2013.01); G08B 29/043 (2013.01); G08B 29/24 (2013.01); G08B 17/113 (2013.01)
Citation (search report)
- [Y] EP 0631263 A1 19941228 - HEKATRON GMBH [DE]
- [Y] US 2004063154 A1 20040401 - BOOTH DAVID K [US], et al
- [A] JP 2001034863 A 20010209 - SUMITOMO DENSETSU CORP
- [A] US 3885162 A 19750520 - GEERTZ LLOYD M
- [A] DE 10346741 B3 20050324 - MECHALESS SYSTEMS GMBH [DE]
- [X] DE 1261024 B 19680208 - LICENTIA GMBH
- [X] US 3641549 A 19720208 - MISEK VICTOR A, et al
- [A] JP H07239958 A 19950912 - ITO SEISAKUSHO
- [A] DE 4432114 C1 19950608 - HELLA KG HUECK & CO [DE]
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 LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1777670 A2 20070425; EP 1777670 A3 20070725; EP 1777670 B1 20090121; AT E421742 T1 20090215; DE 102005050451 A1 20070503; DE 502006002695 D1 20090312
DOCDB simple family (application)
EP 06020998 A 20061006; AT 06020998 T 20061006; DE 102005050451 A 20051019; DE 502006002695 T 20061006