System and methods for triggering and transmitting vehicle alarm

Details System and methods for triggering and transmitting vehicle alarm System and methods for triggering and transmitting vehicle alarm

1997-05-30

1999-02-23

Mullen, Jr., Thomas J.

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340428, 340430, 340539, 307 102, 307 103, B60R 2510

Patent

active

058748890

ABSTRACT:
A vehicle security system and methods for triggering alarms, including a controller responsive to entry of a security code via the keypad which matches a particular security code to disengage an starter blocking relay. The controller is further responsive to determining that the ignition switch is turned to the "on" position without prior entry of a matching security code to start a timer which times out after a predetermined period of time, whereby in response to non-entry of a matching security code before expiration of the predetermined period of time, the controller generates an alarm signal for transmission via the wireless transceiver to a central monitoring station. If the controller determines that the ignition switch is turned to its off position after the timer is started, it disengages the starter blocking relay so as to enable ignition of the vehicle. Consequently, an attacker will believe he has successfully started the ignition of the car, while the central monitoring station will have been alerted of the intrusion and notified the police authorities.

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