Safety device for battery-operated watches

Details Safety device for battery-operated watches Safety device for battery-operated watches

1975-08-06

1979-03-20

Scott, James R.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 2, G04C 300

Patent

active

041447042

ABSTRACT:
A safety device for battery-operated watches including an indicator device and an accumulator connected in parallel with the battery supplying the electronic circuit of the watch. The battery charges up the accumulator during normal use and when the battery runs down the indicator device gives a visual indication of battery condition and the accumulator continues to provide current to the electronic circuit of the watch for a time to enable the battery to be replaced.

REFERENCES:
patent: 3427797 (1969-02-01), Kimura
patent: 3680072 (1972-07-01), Charbonnier
patent: 3802182 (1974-04-01), Fujita
patent: 3832629 (1974-08-01), Cernek
patent: 3858389 (1975-01-01), Tsuruishi
patent: 3889461 (1975-06-01), Marti
patent: 3898790 (1975-08-01), Takamune
patent: 3979656 (1976-09-01), Takeda et al.

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