Power failure detection and shut down timer

Details Power failure detection and shut down timer Power failure detection and shut down timer

1993-01-05

1994-05-24

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

371 66, 3642734, G06F 130, H02H 324, H02J 906

Patent

active

053151615

ABSTRACT:
A system and method for providing power from a source of stored electrical energy to a microcomputer for a user established "ride-through" period of time after a disruption in the primary power supply for the microcomputer. If the primary power supply is not restored within the ride-through time period the system performs an orderly shut down of computer applications. Should stored energy reserves run low during the primary power disruption, the system instead performs an abbreviated, critical application shut down. Following application shut down, or upon the expiration of a user established "shut down" time period, the system performs an orderly shut down of computer system operations and thereafter removes all power from the computer. Shut down and shut off procedures are canceled, if possible, upon restoration of the primary power supply.

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patent: 4908523 (1990-03-01), Snowden et al.
patent: 5012406 (1991-04-01), Martin
patent: 5117324 (1992-05-01), Johnson, Jr.
patent: 5151855 (1992-09-01), Gray et al.

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