Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2008-05-20
2008-05-20
La, Anh V (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S689000, C340S521000, C367S013000
Reexamination Certificate
active
11418679
ABSTRACT:
A seismic switch is a programmable device capable of distinguishing between seismic movements due to an earthquake or an explosion, which is used to send a signal to control panels for security doors. The device uses accelerometers and a microcontroller for the detection and signal analysis of the seismic movements. In the event of an explosion or earthquake, the device produces an alarm.
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La Anh V
Ryznic John
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