Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1979-10-12
1981-08-18
Hickey, Robert J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 21, 320 39, 340636, H02J 704, G08B 2100
Patent
active
042849446
ABSTRACT:
Battery charging device having a function of indicating in sounds at least one of charging and discharging states of a storage battery, specifically adapted to be incorporated in battery operated electric implements. During charge operation, a charging circuit oscillatorily generates from a rectified direct current of commercial AC source current a high frequency charging voltage, of which oscillation becomes intermittent with varying intervals after a predetermined battery charge level is reached, whereby a charge complete detecting circuit causes a sound generating device to be operated to sound discriminatively initial and final charge complete indications responsive to the varying intervals. During discharge operation, a charge remind detecting circuit provides an output to the sound generating means only after a predetermined discharge level is reached, to cause the means device to be operated to sound a charge remind indication.
REFERENCES:
patent: 3196357 (1965-07-01), Hoag
patent: 3609502 (1971-09-01), Burkett et al.
patent: 3736480 (1973-05-01), Lee
patent: 4067000 (1978-01-01), Carlson
Iwanaga Kouichi
Kakumoto Hiromi
Hickey Robert J.
Matsushita Electric & Works Ltd.
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