Anti-lockout system

Details Anti-lockout system Anti-lockout system

1994-04-19

1995-08-01

Crosland, Donnie L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3404571, 340542, 340539, 307 101, 70263, B60Q 100

Patent

active

054383129

ABSTRACT:
An electronic system for preventing keys from being locked inside a vehicle. An ignition or door key houses a wireless transmitter which can send a signal to lock or unlock the vehicle doors. As a driver approaches a locked car, the unlock button on the transmitter is pressed, thereby unlocking the doors. Upon exiting the vehicle, a driver may inadvertently lock himself out of the vehicle if the doors are manually locked when the door key is inadvertently left somewhere inside the car. To prevent lock-out, an oscillating unlock signal is automatically sent from the transmitter to the electronic door locks. Simultaneously an alarm sounds to alert the driver that the keys are still in the car. The driver returns to the vehicle, opens the doors which have been automatically unlocked, and retrieves the keys. Upon retrieval of the keys, the driver again exits the vehicle, locks the doors manually or electronically, and presses the lock button to stop the alarm and end the transmission of the oscillating unlock signal.

REFERENCES:
patent: 4096468 (1978-06-01), Kopera, Jr.
patent: 4419712 (1983-12-01), Shimizu
patent: 4428024 (1984-01-01), Mochida et al.
patent: 4672375 (1987-06-01), Mochida et al.
patent: 4709777 (1987-12-01), Metz
patent: 4789851 (1988-12-01), Hock et al.
patent: 4811013 (1989-03-01), Akutsu

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