EP 1012805 A1 20000628 - SMOKE DETECTOR
Title (en)
SMOKE DETECTOR
Title (de)
RAUCHMELDER
Title (fr)
DETECTEUR DE FUMEE
Publication
Application
Priority
- DE 9800857 W 19980324
- DE 19741853 A 19970923
Abstract (en)
[origin: US6239710B1] A smoke alarm on the scattered radiation principle. Having a measuring field (5), accessible to smoke particles, in a measuring chamber, at which field the radiation direction of a radiation transmitter (6) is aimed, and scattered radiation occurring in the measuring field (5) can be received by a radiation receiver (7); the measuring chamber includes a portion of the hollow ellipsoid (3) which is mirror-coated on the inside; the measuring field (5) is disposed at the first focal point (1) of the hollow ellipsoid; the radiation receiver (7) is disposed at the second focal point (2) of the hollow ellipsoid (3).
IPC 1-7
IPC 8 full level
G01N 21/53 (2006.01); 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 FI FR GB IT LI LU NL PT SE
DOCDB simple family (publication)
US 6239710 B1 20010529; AT E219592 T1 20020715; AU 8007498 A 19990412; CN 1111829 C 20030618; CN 1261972 A 20000802; DE 19741853 A1 19990325; DE 59804533 D1 20020725; EP 1012805 A1 20000628; EP 1012805 B1 20020619; ES 2178839 T3 20030101; JP 2001517843 A 20011009; WO 9916033 A1 19990401
DOCDB simple family (application)
US 44587899 A 19991214; AT 98928058 T 19980324; AU 8007498 A 19980324; CN 98806808 A 19980324; DE 19741853 A 19970923; DE 59804533 T 19980324; DE 9800857 W 19980324; EP 98928058 A 19980324; ES 98928058 T 19980324; JP 2000513256 A 19980324