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Bryant, J.; Howes, J.H.; Smout, D.W.S.
Radiochemical Centre Ltd., Amersham (UK)1979
Radiochemical Centre Ltd., Amersham (UK)1979
AbstractAbstract
[en] A smoke detector is described which provides a smoke sensing detector and an indicating device and in which a radioactive substance is used in conjunction with two ionisation chambers. The system includes an outer electrode, a collector electrode and an inner electrode which is made of or supports the radioactive substance which, in this case, is 241Am. The invention takes advantage of the fact that smoke particles can be allowed to enter freely the inner ionisation chamber. (U.K.)
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Source
8 Aug 1979; 4 p; GB PATENT DOCUMENT 2013393/A/
Record Type
Patent
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