Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Patent
1990-06-12
1991-10-29
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
340528, 340543, 307 101, 307 102, 307 103, 307 106, B60R 2510, B60L 100
Patent
active
050619152
ABSTRACT:
An anti-theft device for motorized vehicles consisting of three relays and a number of switches controlled by the relays that are wired into the existing electrical system of the vehicle. The first relay energizes in response to an electrical signal generated by the existing electrical system and controls the sequencing of the disarming steps. The second relay disarms the device when energized by a signal generated in the existing electrical system but only after the first relay has been energized. The third relay activates the alarm and/or disables the vehicle starter when energized. The third relay will energize when there is an attempt to start a vehicle without following the prescribed sequence of disarming steps and is prevented from sounding an alarm and/or disabling the vehicle starter by the second relay when the second relay is energized. A connector consisting of a male-female pair that is installed with the pair disconnected. The connector allows the vehicle operator to disarm the system from inside the vehicle once the alarm is triggered. The operator can thereby practice the sequence of disarming steps until he is comfortable with the invention, whereupon he can simply connect the male-female pair to prevent disarming of the device from inside the vehicle once the device is triggered. The valet switch switches power from the electrical system directly to the third relay to energize the third relay and activate the device unless the valet switch is used while the device has already been disarmed or disabled.
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