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1. (WO1984000074) DEVICE FOR DETECTING THE IONISATION LEVEL OF A GAS MIXTURE CONTROLLED BY ELECTRIC ARC
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1984/000074 International Application No.: PCT/FR1983/000125
Publication Date: 05.01.1984 International Filing Date: 17.06.1983
IPC:
G08B 17/11 (2006.01)
G PHYSICS
08
SIGNALLING
B
SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17
Fire alarms; Alarms responsive to explosion
10
Actuation by presence of smoke or gases
11
using an ionisation chamber for detecting smoke or gas
Applicants:
Inventors:
Priority Data:
null30.12.1899null
Title (EN) DEVICE FOR DETECTING THE IONISATION LEVEL OF A GAS MIXTURE CONTROLLED BY ELECTRIC ARC
(FR) DETECTEUR DE NIVEAU D"IONISATION D"UN MILIEU GAZEUX CONTROLE PAR ARC ELECTRIQUE
Abstract:
(EN) The ionisation is created by electric arc within the chamber (4) which communicates with the ambient medium through the protection grid (5). The electrodes (E3, E4) to measure the connectivity as a function of the ionisation level allow to restrike an electric discharge between (E1) and (E2) from a certain threshold by the reaction circuit (10) controlling the gate (9) and causing the discharge of the capacitor (C1) in the winding (8). The control of the frequency of discharges allows to know the variations of the ionisation level.
(FR) L"ionisation est créée par arc électrique au sein de la chambre (4) qui est en communication avec le milieu ambiant à travers la grille de protection (5). Les électrodes (E3, E4) de mesure de la conductivité fonction du niveau d"ionisation permettent de réamorcer une décharge électrique entre (E1) et (E2) à partir d"un certain seuil par le circuit de réaction (10) commandant la porte (9) et déclenchant la décharge du condensateur (C1) dans l"enroulement (8). Le contrôle de la fréquence des décharges permet de connaître les variations du niveau d"ionisation.
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
FI840623NO19840588CA1212784AU1983016071