EP 0319876 A3 19900530 - MOTION ALARM WITH AN INFRARED DETECTOR
Title (en)
MOTION ALARM WITH AN INFRARED DETECTOR
Publication
Application
Priority
DE 3742031 A 19871211
Abstract (en)
[origin: EP0319876A2] In motion alarms with segmented collecting optics, dead spaces occur between the individual focusing segments, in which a radiation object can be located without triggering a signal. These dead spaces are to be avoided in practice in the new motion alarm. <??>For this purpose, deflection optics (3) are arranged behind the collecting optics (1), which in each case deflect a part of the beam of rays (8) incident in parallel with the main beam (6) of a segment (2), in such a manner that at least two radiation peaks are produced. These radiation peaks successively impinge on sensor elements (7) of the sensor (5) with a corresponding change in position of the radiation object (13). This reduces the size of the dead spaces to such an extent that, in practice, they no longer exist. <??>The motion alarm is used for room surveillance inside and outside buildings. It can switch on illumination or trigger an alarm by signal transmission. <IMAGE>
IPC 1-7
IPC 8 full level
G08B 13/193 (2006.01)
CPC (source: EP US)
G08B 13/193 (2013.01 - EP US); Y10S 250/01 (2013.01 - EP US)
Citation (search report)
- [A] EP 0094658 A1 19831123 - CERBERUS AG [CH]
- [A] EP 0025188 A1 19810318 - CERBERUS AG [CH]
- [A] DE 3235250 A1 19840329 - HEIMANN GMBH [DE]
- [AD] EP 0113468 A2 19840718 - ZUBLIN MARCEL DIPL ING ETH
- [A] US 4625115 A 19861125 - GUSCOTT JOHN K [US]
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0319876 A2 19890614; EP 0319876 A3 19900530; DE 3742031 A1 19890622; NO 173476 B 19930906; NO 173476 C 19931215; NO 885487 D0 19881209; NO 885487 L 19890612; US 4893014 A 19900109
DOCDB simple family (application)
EP 88120222 A 19881203; DE 3742031 A 19871211; NO 885487 A 19881209; US 28322588 A 19881212