Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1992-08-19
1994-07-26
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250342, G08B 1318
Patent
active
053329023
ABSTRACT:
A detection unit comprises a support element and at least one module connectable to the support element, each module comprising a housing and an infrared detector fitted therein. When connected each module has a defined circumferential position relative to the support element. Preferably, the detection unit is designed for fitting three modules which circumferentially enclose the support element, as well as a further module.
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patent: 4486661 (1984-12-01), Guscott et al.
patent: 4746906 (1988-05-01), Lederer
patent: 4847485 (1989-07-01), Koelsch
patent: 4912748 (1990-03-01), Horii et al.
patent: 5026990 (1991-06-01), Marman et al.
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