Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Reexamination Certificate
2004-07-23
2009-10-13
Fleming, Fritz M (Department: 2836)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
Reexamination Certificate
active
07602082
ABSTRACT:
In order for a backup battery to prolong a backup time period for a mobile instrument, a control signal Sc1becomes either low or high in accordance with a determination that a power supply voltage Vm of a main battery is either lower or higher than a prescribed level V1requiring backup from the backup battery. A control signal Sc2also becomes either low or high in accordance with a determination that a backup voltage Vb of the backup battery is either higher or lower than a power supply voltage Vm supplied by a main battery. When both of the control signals Sc1and Sc2are in the high level, a control switch is turned ON so as to stop a current from flowing from the backup battery to the main battery. The control switch is otherwise turned OFF.
REFERENCES:
patent: 7109606 (2006-09-01), Bedouet
patent: 7157808 (2007-01-01), Seligman
patent: 2004/0104715 (2004-06-01), Manabe et al.
patent: 0 580 180 (1994-01-01), None
patent: 0 923 184 (1999-06-01), None
patent: 10-145527 (1998-05-01), None
Dickstein & Shapiro LLP
Fleming Fritz M
Parries Dru M
Ricoh & Company, Ltd.
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