Calculator driving and battery pack recharging circuit

Details Calculator driving and battery pack recharging circuit Calculator driving and battery pack recharging circuit

1977-06-20

1979-02-20

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 6, 429 9, H02J 700

Patent

active

041409574

ABSTRACT:
A circuit to conveniently and safely drive an electronic calculator from a source of ac power or, alternately, from either one of a plurality of disposable batteries or a unique, rechargeable battery pack. The present circuit includes an arrangement of contact means particularly positioned in a predetermined relationship within the battery compartment of the calculator and on the rechargeable battery pack. When disposable batteries are deposited inside the battery compartment of the calculator and an ac adapter accessory is connected to provide power to the calculator, the disposable batteries are electrically isolated from the ac source. However, when the rechargeable battery pack is deposited inside the battery compartment of the calculator and the ac adapter is connected to provide power to the calculator, the battery pack is recharged.

REFERENCES:
patent: 3013198 (1961-12-01), Witte et al.
patent: 3070748 (1962-12-01), Worobey et al.

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