Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1982-08-13
1984-07-17
Shoop, William M.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 22, H02J 700
Patent
active
044608632
ABSTRACT:
A flashlight has a built-in passive battery charging circuit adapted to be plugged into an associated AC source, and a selector switch for selectively connecting the battery to the charging circuit or to the flashlight lamp. The charging circuit includes a transformer with a center-tapped secondary providing a high voltage at one set of terminals and a low voltage at another set of terminals. The high voltage is rectified by an LED and applied through a current-limiting resistor to the selector switch. The low voltage is full-wave rectified by a diode bridge, the output terminals of which are coupled to the selector switch. Also connected across the output terminals of the diode bridge is a Zener diode circuit for terminating current flow from the bridge to the battery when the battery voltage reaches a predetermined level.
REFERENCES:
patent: 3327198 (1967-06-01), Rauch
patent: 3356928 (1967-12-01), Parrish
patent: 3413537 (1968-11-01), Sharp et al.
patent: 3736490 (1973-05-01), Fallon et al.
patent: 4177413 (1979-12-01), Ascoli
patent: 4281278 (1981-07-01), Bilsky et al.
patent: 4323960 (1982-04-01), Jones
"Battery Application Manual", Gates Energy Products, Inc., pp. 39-48, 1980.
Pittway Corporation
Shoop William M.
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