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Current content: 156 511 693 patent documents

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EP 0588232 B1 19970709 - Optic smoke detector

Title (en)

Optic smoke detector

Title (de)

Optischer Rauchmelder

Title (fr)

Détecteur optique de fumée

Publication

EP 0588232 B1 19970709 (DE)

Application

EP 93114472 A 19930909

Priority

CH 288492 A 19920914

Abstract (en)

[origin: EP0588232A1] An improved optical smoke detector is obtained if at least one planar-optical element (5) is arranged in the beam path between radiation source (1) and radiation receiver (2). This element can be either a diffractive element, preferably a holographic-optical element (HOE) or a micro-Fresnel reflector (MFR). <IMAGE>

IPC 1-7

G08B 17/107

IPC 8 full level

G08B 17/107 (2006.01)

CPC (source: EP US)

G08B 17/107 (2013.01 - EP US); G08B 17/113 (2013.01 - EP US)

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB IT LI LU NL SE

DOCDB simple family (publication)

EP 0588232 A1 19940323; EP 0588232 B1 19970709; AT E155272 T1 19970715; CH 684556 A5 19941014; DE 59306866 D1 19970814; ES 2106930 T3 19971116; US 5451931 A 19950919

DOCDB simple family (application)

EP 93114472 A 19930909; AT 93114472 T 19930909; CH 288492 A 19920914; DE 59306866 T 19930909; ES 93114472 T 19930909; US 12094793 A 19930914