Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1994-12-06
1996-07-09
Swarthout, Brent A.
Communications: electrical
Condition responsive indicating system
With particular system function
340511, 340547, 340551, G08B 1308
Patent
active
055348491
ABSTRACT:
A magnetically actuated switch system (10) has reduced sensitivity to false alarms and reduced power consumption and resistance to physical and magnetic tampering. The system includes a signal processing circuit controlled by a microprocessor (16) that selectively enables magnetic sensors (12, 38), and compares the corresponding sensor outputs (76) to automatically calibrated level and predetermined timing characteristics.
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Benowitz Michael
McDonald Kevin B.
Pierce Stephen W.
Terrett David S.
Rives Stoel
Sentrol, Inc.
Swarthout Brent A.
Wu Daniel J.
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