Direct-current power supply with alarm indicator

Details Direct-current power supply with alarm indicator Direct-current power supply with alarm indicator

1984-11-23

1986-07-01

Wong, Peter S.

Electricity: power supply or regulation systems

External or operator controlled

Using a three or more terminal semiconductive device as the...

323281, 320 48, 340636, G05F 146, G01N 2746

Patent

active

045982430

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.

REFERENCES:
patent: 4020414 (1977-04-01), Paredes
patent: 4321525 (1982-03-01), Imazeki et al.
patent: 4349777 (1982-09-01), Mitamura
patent: 4413234 (1983-11-01), Lupoli

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