System and method for a power supply device

Details System and method for a power supply device System and method for a power supply device

2007-06-05

2009-06-23

Paladini, Albert W (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

C307S126000, C340S635000, C340S636100, C340S663000

Reexamination Certificate

active

07550874

ABSTRACT:
A power supply apparatus is disclosed herein. The power supply apparatus includes a power output, a first power source selectively connectable to the power output, and a second power source selectively connectable to the power output. A switch is configured to couple the first power source with the power output until the first power source becomes substantially depleted. The switch is also configured to couple the second power source with the power output after the first power source becomes substantially depleted. An indicator is configured to precisely convey the amount of power remaining in the power supply apparatus after the first power source becomes substantially depleted.

REFERENCES:
patent: 5483165 (1996-01-01), Cameron et al.
patent: 5770897 (1998-06-01), Bapat et al.
patent: 5796175 (1998-08-01), Itoh et al.
patent: 5983137 (1999-11-01), Yerkovich
patent: 6304779 (2001-10-01), Yerkovich
patent: 7388349 (2008-06-01), Elder et al.

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