Magnetic door locking system

A magnetic locking system in combination with a door for locking said door to a fixed member comprising:

• a key cylinder mounted in said door and adapted to be operatively associated with a door locking mechanism;
• a magnetic sensor connected to said door in the vicinity of said key cylinder, said magnetic sensor being adapted to operate when a predetermined magnitude of magnetic force is applied thereto in a direction substantially parallel with a given axis of said magnetic sensor;
• control means mounted to said door for locking said door to the fixed member when said magnetic sensor operates;
• and
• a magnet-mounted key means for engagement with said key cylinder to turn the same about its axis and having a key head and magnet piece fixed thereto, said magnet piece having at axially opposed end portions north and south poles, respectively, defining a polar axis and being adapted to apply said predetermined magnitude of magnetic force to actuate said sensor when positioned adjacent said magnetic sensor with the polar axis extending substantially parallel with said given axis of said magnetic sensor;
• said magnet piece of said key means being arranged in said key head so that when the key means is operatively engaged with said key cylinder, the polar axis of said magnet piece describes a plane which intersects said given axis of said magnetic sensor as said key means turns the key cylinder about its axis.