Image Number 5 for United States Patent #7242282.
The wireless anti-lockout system automatically unlocks a driver's side door when the driver locks the car keys within the car. The anti-lockout system includes door-lock and trunk-lock sensors, a key chain transponder, transponder sensors and an occupant presence sensor. When the doors and trunk are locked, the key chain transponder is detected in the car, and an occupant is not detected, signals are sent to a microprocessor, which alerts a door lock control to unlock the driver's side door and activates an alarm. Additional sensors may be added. The system may include a transmission sensor and a driver detection sensor, so that when a driver is not detected, or when the transmission gear is in park or neutral, in addition to the other three signal conditions, the door lock control unlocks the driver's side door and an alarm is activated.