Global Patent Index - EP 0880118 A3

EP 0880118 A3 2000-01-05 - Optical smoke detector

Title (en)

Optical smoke detector

Title (de)

Optischer Rauchmelder

Title (fr)

Détecteur optique de fumée

Publication

EP 0880118 A3 (DE)

Application

EP 98108717 A

Priority

DE 19721065 A

Abstract (en)

[origin: EP0880118A2] The alarm has a measurement chamber (1), a light transmitter (2) with a corresp. transmission path (8) and a light receiver (3) with a corresp. light reception path (6). The transmitter and receiver are arranged so that the optical axes of their associated light paths intersect at a back-scatter angle (4) greater than 90 degrees in the measurement chamber. At least one stop (7) in the transmitter path and at least one stop (5) in the receiver path are arranged so that the paths are only superimposed in an overlap region (11) in the measurement chamber contg. small edges or surfaces on which moisture or fouling form.

IPC 1-7 (main, further and additional classification)

G08B 17/107

IPC 8 full level (invention and additional information)

G08B 17/107 (2006.01)

CPC (invention and additional information)

G08B 17/107 (2013.01); G08B 17/113 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0880118 A2 19981125; EP 0880118 A3 20000105; EP 0880118 B1 20030813; AT 247316 T 20030815