Automatic door lock prevention system
OwnerRobert W. Robbins, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A system to prevent an automobile door from being locked while the key is in the ignition switch and the driver is outside comprising an electric circuit including a switch on the ignition lock that is closed when the key is in the lock, a switch on the door that is closed when the door is open and a switch on the door lock mechanism that is closed when the lock mechanism is moved toward the locked position; the closing of all three switches activating a solenoid which moves the lock mechanism to the unlocked position.
Claims12
A system for an automobile to prevent the driver from locking the doors when the ignition key is in the ignition lock and the driver is outside the automobile comprising:
- a. a source of electric current;
- b. a first switch means associated with the ignition lock and adapted to be closed when said key is in said lock, said first switch being connected to said source of electric current;
- c. a second switch associated with the front door on the driver's side of said automobile and adapted to be closed when said door is open, said second switch being connected in series with said first switch;
- d. means for locking said door from inside the automobile;
- e. a third switch means associated with a solenoid operated means adapted to unlock said door when said third switch means is closed;
- said third switch adapted to be closed by the driver activating said means for locking said door from inside the automobile;
- and
- f. relay means connected in series between said first switch means and said third switch means.
A system for preventing an automobile driver from locking himself out of the automobile while the ignition key is in the ignition lock which comprises an electric power source connected to an ignition switch means in said ignition lock which is closed when said key is fully inserted into said lock, door switch means which is closed when the driver's door is open and which is connected in series with said ignition switch means, a door lock switch means connected in series with said ignition switch means and said door switch means to make a circuit with said power source when said door lock switch means is closed, said door lock switch means being adapted to be closed when said driver operates the door locking means to lock the door, and a solenoid operated door unlocking means which is activated upon closing of said door lock switch means.
Dependencies are inferred from the claim text.