Power failure detection and shut down timer
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United States of America Patent
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May 24, 1994
Issued Date -
N/A
app pub date -
Jan 5, 1993
filing date -
Sep 27, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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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