Rechargeable battery backup power source for an ionization smoke

Details Rechargeable battery backup power source for an ionization smoke Rechargeable battery backup power source for an ionization smoke

1977-10-25

1979-05-15

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

320 48, 340636, 340333, G08B 1710, G08B 2100, H02J 702

Patent

active

041550811

ABSTRACT:
A circuit for a rechargeable battery backup power source used with an ionization smoke detector device whereby upon the failure of the main alternating current power source, a battery which is normally charged from the power source during standby operation is connected to an ionization smoke detector circuit to maintain its energization upon the loss of the alternating current power source.

REFERENCES:
patent: 3421066 (1969-01-01), Flynn et al.
patent: 3750123 (1973-07-01), Caillouet, Jr.
patent: 3890555 (1975-06-01), Nelson et al.
patent: 4038649 (1977-07-01), Dobrzanski

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