Title:
SCATTERRLIGHTTTYPE SMOKE SENSOR
Document Type and Number:
Japanese Patent JPS5694495
Kind Code:
A
Abstract:
In an alarm installation containing a central evaluation unit and alarm devices arranged remotely therefrom, the transmission of energy from a radiation source and the reporting back of the signal occurs exclusively according to optical principles by means of radiation conducting elements, so-called light guides or conductors, by means of which the alarm devices are connected with the evaluation device. The alarm devices contain a preferably high-ohm sensor element, for instance a smoke-sensitive ionization chamber, whose operating voltage is infed by means of a solar cell which is irradiated by a light guide and whose output signal is fed back to the evaluation device by means of a high-ohm electrical transducer and a light guide. Such type alarm installation preferably is used for fire detection purposes, for gas, smoke temperature detection or intrusion protection, and is particularly suitable for use in an explosion-endangered environment or one subjected to electrical disturbances.
Inventors:
YURUGU MUGURI
GUSUTAFU BUFUISUTAA
GUSUTAFU BUFUISUTAA
Application Number:
JP17732080A
Publication Date:
July 30, 1981
Filing Date:
December 17, 1980
Export Citation:
Assignee:
CERBERUS AG
International Classes:
G08B13/00; G08B17/00; G08B17/06; G01N21/53; G08B17/10; G08B17/107; G08B17/113; G08B19/00; G08B21/00; G08B21/16; G08B21/20; G08B25/01; (IPC1-7): G01N21/53; G08B17/06
Domestic Patent References:
| JP53152683B |
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