Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Reexamination Certificate
2006-10-10
2008-12-30
Nguyen, Hung T. (Department: 2612)
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
C340S426250, C340S426260, C340S428000, C340S429000, C340S438000, C340S467000, C307S010100, C307S010200
Reexamination Certificate
active
07471190
ABSTRACT:
An anti-theft vehicle alarm system includes an acceleration sensor acting as a tilt sensor, a microcomputer, a first power source for supplying a first voltage to the microcomputer, and a second power source for supplying a second voltage to the acceleration sensor. The microcomputer calculates a tilt angle of a vehicle from output of the acceleration sensor and activates an alarm in accordance with the tilt angle. If the second voltage is outside a predetermined voltage range, for example, due to a reduction in battery voltage, the microcomputer temporarily stops to activate the alarm to prevent a false alarm. The microcomputer monitors the second voltage not the battery voltage. Thus, even when the second voltage is outside the threshold range, for example, due to a breakdown in the second power source, the false alarm can be prevented.
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patent: 6373147 (2002-04-01), Miyaguchi et al.
patent: 2004/0217849 (2004-11-01), Maehara
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Office Action dated Apr. 14, 2008 in corresponding German Patent Application No. 10 2006 049 903.4-51 (and English translation).
DENSO CORPORATION
Nguyen Hung T.
Posz Law Group , PLC
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