Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1987-06-15
1988-08-16
Salce, Patrick R.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 37, 34030915, H02J 700
Patent
active
047647159
ABSTRACT:
A circuit is described for timing the intermittent use of an appliance, wherein the appliance includes a usage signal for indicating that the appliance is in use. The circuit includes a battery, and a resistive network, coupled to the battery, for draining power from the battery such that the power level thereof decreases to a threshold level over a selected timing interval. The circuit further includes a switch, responsive to the usage signal, for selectively enabling the resistive network, and a battery level threshold detector, responsive to the battery reaching the threshold level, for indicating that the timing interval has lapsed, thereby alerting the operator that the appliance should be serviced, which service includes replacement of the low cost battery.
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Kowalewski Rolf E.
Schmitz Charles J.
Ault Anita M.
Crawford Robert J.
Motorola Inc.
Salce Patrick R.
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