Direct-current power supply with alarm indicator
First Claim
1. A direct-current power supply apparatus for supplying electric current to a load, a plurality of types of batteries being applicable to said apparatus, comprising:
- housing means for installing therein a battery employed;
monitor means for monitoring a voltage output from the battery installed;
indicator means for indicating a warning condition of the battery installed;
comparing means for comparing the voltage monitored with a reference voltage to energize said indicator means when the monitored voltage becomes lower than the reference voltage;
voltage generating means for generating a plurality of voltages as the reference voltages associated with said types of batteries available; and
selecting means for selectively supplying one of the plurality of voltages generated to said comparing means, said plurality of voltages each being set to a value higher than a limit voltage which is sufficiently low for allowing a normal operation of said load.
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Accused Products
Abstract
A direct-current power supply for supplying electric current to a load and operable with a plurality of types of batteries includes a housing unit for loading therein batteries employed, a monitor device for monitoring a voltage output from batteries in use, an indicator for indicating a warning, a comparing device which compares the monitored voltage with a reference voltage to energize the indicator when the monitored voltage becomes lower than the reference voltage, a voltage generating unit for generating a plurality of voltages as the reference voltages associated with the types of batteries available, and a selecting unit for selectively supplying one of the plurality of voltages generated to the comparing device. Each of the plurality of voltages is set to a value higher than a limit voltage which is sufficiently low for allowing an normal operation of the load.
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Citations
7 Claims
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1. A direct-current power supply apparatus for supplying electric current to a load, a plurality of types of batteries being applicable to said apparatus, comprising:
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housing means for installing therein a battery employed; monitor means for monitoring a voltage output from the battery installed; indicator means for indicating a warning condition of the battery installed; comparing means for comparing the voltage monitored with a reference voltage to energize said indicator means when the monitored voltage becomes lower than the reference voltage; voltage generating means for generating a plurality of voltages as the reference voltages associated with said types of batteries available; and selecting means for selectively supplying one of the plurality of voltages generated to said comparing means, said plurality of voltages each being set to a value higher than a limit voltage which is sufficiently low for allowing a normal operation of said load. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification