Battery replacement system for battery-powered digital data hand

Details Battery replacement system for battery-powered digital data hand Battery replacement system for battery-powered digital data hand

1989-04-14

1991-07-02

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 85, H02J 904

Patent

active

050288067

ABSTRACT:
A battery-powered lap-top computer has a main battery for ordinarily supplying power to the computer circuitry. A reserve battery is connected through an automatic switch to the circuitry. The circuitry is connected to a pair of contacts and the switch is connected to a contact. The main battery has positive and negative terminals, and a removal terminal which is shorter in length than the positive and negative terminals. When the main battery loses its charge, it is removed by a sliding action which slides the terminals past the contacts, the removal terminal being the first terminal to lose contact. This activates the automatic switch, connecting the reserve battery into the circuitry so that when the positive and negative terminals are no longer contacted, the reserve battery will have been supplying and will continue to supply power to the circuitry. A charged main battery is then installed, deactivating the switch, removing the reserve battery from the circuitry. Provision is made for the main battery to slowly charge the reserve battery.

REFERENCES:
patent: 4079440 (1978-03-01), Ohnuma et al.
patent: 4191917 (1980-03-01), Brown et al.
patent: 4232377 (1980-11-01), Tallman
patent: 4528459 (1985-07-01), Wiegel
patent: 4675538 (1987-06-01), Epstein
patent: 4760277 (1988-07-01), Vurpillat

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