Method and system for generating automatic alarms based on...

Communications: electrical – Condition responsive indicating system

Reexamination Certificate

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C340S506000, C340S003100, C340S511000, C340S517000, C340S522000

Reexamination Certificate

active

07030746

ABSTRACT:
A method to detect a change in a condition of a system including: sensing the condition of the system and capturing data values indicative of the sensed condition; periodically determining a difference between a first data value and a second data value; determining a characteristic representative of a series of differences representative of a predetermined period; comparing the characteristic to at least one threshold level, and generating an alarm if the characteristic is beyond the threshold level.

REFERENCES:
patent: 5200743 (1993-04-01), St. Martin et al.
patent: 5400246 (1995-03-01), Wilson et al.
patent: 6405139 (2002-06-01), Kicinski et al.
patent: 6507804 (2003-01-01), Hala et al.
patent: 2003/0182083 (2003-09-01), Schwenke et al.
patent: 2003/0208706 (2003-11-01), Roddy et al.

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