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US 5,633,592 AGranted
Charge status indicator
AssigneeBraun GmbH
InventorGerhard Lang
Life of this patent
Estimating the term…
Abstract
A circuit arrangement for indicating the charge status of a batter in an electrical appliance includes a voltage comparator with hysteresis which detects the battery voltage, an oscillator driven by the voltage comparator, and an indicating device. The oscillator oscillates when the voltage is above a first threshold voltage and switches the indicating device to an active condition. The oscillator is blocked when the voltage is below a second threshold voltage and switches the indicated device to a passive condition.
Claims10
A circuit arrangement for indicating the charge status of a battery in an electrical appliance comprising:
- a voltage comparator with hysteresis for detecting a battery voltage of the battery,
- an indicating device having a symbol printed thereon, the indicating device switched to an active condition when the voltage is above a first threshold voltage, the indicating device switched to a passive condition when the voltage is below a second threshold voltage with the absolute value of the first threshold voltage being greater than the absolute value of the second threshold voltage, the symbol being visible only when the indicating device is in the passive condition.
Dependencies are inferred from the claim text.