Operator lockout prevention device

Details Operator lockout prevention device Operator lockout prevention device

1988-10-14

1990-07-24

Wolfe, Robert L.

Locks

Systems

Operation and control

70277, E05B 4700

Patent

active

049427474

ABSTRACT:
A device for preventing an operator of a vehicle from locking an ignition key in the vehicle includes a key-in-ignition sensor switch, an open-door sensor switch, and a power door lock sensor switch. A logic circuit outputs a pulse to activate a power door unlocking circuit and an audible alarm whenever the three sensor switches indicate that the key is in the ignition, the door is open, and the power door lock switch has been pressed.

REFERENCES:
patent: 4789851 (1988-12-01), Hock

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