Ionization detector with improved radiation source. [fire detection]
Patent
·
OSTI ID:7305150
The detector comprises a chamber having at least one radiation source disposed therein. The chamber includes spaced collector plates which form a part of a detection circuit for sensing changes in the ionization current in the chamber. The radiation source in one embodiment is in the form of a wound wire or ribbon suitably supported in the chamber and preferably a source of beta particles. The chamber may also include an adjustable electrode and the source may function as an adjustable current source by forming the wire or ribbon in an eliptical shape and rotating the structure. In another embodiment the source has a random shape and is homogeneously disposed in the chamber. 13 claims, 5 drawing figures.
- Assignee:
- Gulf and Western Manufacturing Co. (Systems)
- Patent Number(s):
- US 4007374
- OSTI ID:
- 7305150
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440105* -- Radiation Instrumentation-- Radiometric Instruments-- (-1987)
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AEROSOLS
ALARM SYSTEMS
BETA SOURCES
COLLOIDS
DESIGN
DISPERSIONS
FIRES
IONIZATION CHAMBERS
MEASURING INSTRUMENTS
PARTICLE SOURCES
RADIATION DETECTORS
RADIATION SOURCES
RESIDUES
SMOKES
SOLS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AEROSOLS
ALARM SYSTEMS
BETA SOURCES
COLLOIDS
DESIGN
DISPERSIONS
FIRES
IONIZATION CHAMBERS
MEASURING INSTRUMENTS
PARTICLE SOURCES
RADIATION DETECTORS
RADIATION SOURCES
RESIDUES
SMOKES
SOLS