Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-11-22
1993-02-23
Coles,, Sr.,
Communications: electrical
Condition responsive indicating system
Specific condition
2503851, G08B 1710
Patent
active
051893991
ABSTRACT:
A method of the operation of an ionization smoke alarm which has a measuring chamber open to the ambient air and ionizable by a radioactive source. A measuring chamber includes a first electrode to which a supply d.c. voltage is applied and a measuring electrode the potential of which changes in response to the smoke density if smoke enters the measuring chamber. This potential is measured for producing a smoke alarm signal if it reaches a predetermined value. The potential of the measuring electrode is measured for at least one further electric field strength that is compared with at least a second potential which occurs at the second field strength according to the law of the agglomeration of small ions if smoke aerosols are present in the measuring chamber.
REFERENCES:
patent: 3795904 (1974-03-01), Beyersdorf et al.
patent: 3963929 (1976-06-01), Beyersdorf
patent: 4254414 (1981-03-01), Street et al.
patent: 4335379 (1982-06-01), Coleman
patent: 4388616 (1983-06-01), Machida
patent: 4401978 (1983-08-01), Solomon
patent: 4456907 (1984-06-01), Johnson
Coles Sr.
Jackson Jill
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