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1. (WO1979000918) IONISATION DETECTOR CHAMBER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000918 International Application No.: PCT/GB1979/000059
Publication Date: 15.11.1979 International Filing Date: 11.04.1979
IPC:
G08B 17/113 (2006.01) ,H01J 41/08 (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
113
Constructional details
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
J
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
41
Discharge tubes and means integral therewith for measuring gas pressure; Discharge tubes for evacuation by diffusion of ions
02
Discharge tubes and means integral therewith for measuring gas pressure
08
with ionisation by means of radioactive substances, e.g. alphatrons
Applicants:
Inventors:
Priority Data:
14165/7811.04.1978GB
Title (EN) IONISATION DETECTOR CHAMBER
(FR) DETECTEUR A CHAMBRE D"IONISATION
Abstract:
(EN) An inonisation chamber smoke detector in which a first electrode (11) is covered with an insulator (12) except at one end where it is opposed by a measuring electrode (15); the major part of the surface of the insulator (12) carries a conductor (41) not connected to the first electrode (11) to reduce the detrimental effect of condensation on the insulator (12).
(FR) Detecteur de fumee a chambre d"ionisation dans lequel une premiere electrode (11) est recouverte d"un isolant (12) sauf a une extremite ou elle est opposee a une electrode de mesure (15); la majeure partie de la surface de l"isolant (12) porte un conducteur (41) non connecte a la premiere electrode (11) pour reduire l"effet nuisible de condensation sur l"isolant (12).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)