Smoke detector ionisation chamber using nickel-63 source
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United States of America Patent
Stats
-
Jun 22, 1982
Grant Date -
N/A
app pub date -
Aug 27, 1979
filing date -
May 18, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A smoke sensing detector of the dual ionisation region type, including an inner electrode, an outer electrode, and a collector electrode mounted on the inner electrode by means of pillers of insulating material, a first ionisation region being formed by the outer electrode and the collector electrode, and a second or reference ionisation region being formed by the inner electrode and the collector electrode, wherein the collector electrode supports or incorporates a nickel-63 radioactive source emitting radiation into both ionisation regions.
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