Power outage timer
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United States of America Patent
Stats
-
Aug 14, 1984
Grant Date -
N/A
app pub date -
Sep 18, 1981
filing date -
Sep 18, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The power outage timer (36, 136, or 236) forms a part of an electronic watt-hour meter (10) having a microprocessor (22), a real time value memory and a real time clock signal input from a voltage supply (23). The power outage timer (36, 136, or 236) is coupled to the microprocessor (22) for generating a signal when, after a power outage, power is restored, such signal being indicative of the time duration of the power outage and being input to the microprocessor (22) so that the microprocessor (22) can update the real time value in an EAROM (32) to reflect the correct real time.
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