EP 2423895 A3 20150304 - Light scattering smoke alarm with means of suppressing an acoustic warning if battery voltage is low
Title (en)
Light scattering smoke alarm with means of suppressing an acoustic warning if battery voltage is low
Title (de)
Streulicht-Brandmelder mit Mitteln zur Unterdrückung einer akustischen Warnung im Falle einer niedrigen Batteriespannung
Title (fr)
Alarme incendie à lumière diffusée dotée de moyens de suppression d'une alerte acoustique en cas de faible tension d'alimentation
Publication
Application
Priority
DE 102010039835 A 20100826
Abstract (en)
[origin: EP2423895A2] The audible and/or optical detectors (5,6) output an acoustic and/or visual alarm (AA,OA) in the detected event of fire. Independent electrical supply of fire detector is provided by a battery (4) whose voltage is measured by a voltage measuring unit. Acoustic warning (AW) is transmitted as output when battery voltage is below voltage limit (Ulow). The output of acoustic warning is transmitted if the ambient light brightness is below limit value (HG). The detection unit is an open scattered light detecting unit with an exterior fire alarm detection chamber (DR).
IPC 8 full level
G08B 17/107 (2006.01); G08B 29/18 (2006.01)
CPC (source: EP US)
G08B 17/107 (2013.01 - EP US); G08B 29/181 (2013.01 - EP US)
Citation (search report)
- [A] EP 1515290 A1 20050316 - SIEMENS AG [DE]
- [A] US 4287517 A 19810901 - NAGEL RICHARD A
- [A] US 4300133 A 19811110 - SOLOMON ELIAS E
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2423895 A2 20120229; EP 2423895 A3 20150304; EP 2423895 B1 20170308; CN 102568145 A 20120711; CN 102568145 B 20150114; US 2012050051 A1 20120301; US 9053620 B2 20150609
DOCDB simple family (application)
EP 11178548 A 20110823; CN 201110314373 A 20110826; US 201113218554 A 20110826