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1. (WO1983000558) RADIATION DETECTION APPARATUS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1983/000558 International Application No.: PCT/US1982/001071
Publication Date: 17.02.1983 International Filing Date: 03.08.1982
IPC:
G01N 21/43 (2006.01) ,G08B 29/04 (2006.01) ,G08B 29/14 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
41
Refractivity; Phase-affecting properties, e.g. optical path length
43
by measuring critical angle
G PHYSICS
08
SIGNALLING
B
SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29
Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
02
Monitoring continuously signalling or alarm systems
04
Monitoring of the detection circuits
G PHYSICS
08
SIGNALLING
B
SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29
Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
12
Checking intermittently signalling or alarm systems
14
checking the detection circuits
Applicants:
DETECTOR ELECTRONIC CORPORATION [US/US]; 6901 West 110th Street Minneapolis, MN 55438, US
Inventors:
JUAIRE, Michael, P.; US
Agent:
SJOQUIST, Paul, L.; 940 Northwestern Financial Center 7900 Xerxes Avenue South Minneapolis, MN 55431, US
Priority Data:
289,81303.08.1981US
Title (EN) RADIATION DETECTION APPARATUS
(FR) DISPOSITIF DE DETECTION DE RADIATIONS
Abstract:
(EN) Apparatus for detecting hazardous radiation with a light sensitive radiation receiving tube (24) enclosed in a housing (14) behind a transparent window (19), and including an auxiliary internal light source (30) positioned for transmitting light rays into the window and reflecting a portion thereof from the front interface surface of the window back to an internal mirror (29) and to the radiation detection tube (24) for self checking purposes.
(FR) Dispositif de détection de radiations nocives possédant un tube recevant les radiations (24) et sensible à la lumière renfermée dans un boîtier (14) derrière une fenêtre transparente (19) et comprenant une source de lumière auxiliaire intérieure (30) positionnée de manière à envoyer des rayons de lumière contre la fenêtre, une partie de ces rayons étant réfléchie par la surface frontale de séparation de la fenêtre vers un miroir intérieur (29) et d'ici vers le tube de détection de radiations (24) de manière à obtenir un auto-contrôle.
Designated States: GB
Publication Language: English (EN)
Filing Language: English (EN)