Magnetic door lock system

Claim 1

A magnetically coded door locking system comprising: a key having a pair of longitudinal surfaces, and a strip having a magnetically readable intelligence on one of said surfaces; a lock having a rotatable cylinder into which said key may be inserted on a path, and a dynamic magnetic reading device adjacent said insertion path in said cylinder and adjacent said magnetic strip on said key; control means having input circuit means cooperating with said magnetic reading device in said lock, comparison means for comparing said intelligence on said magnetic strip of said key during insertion of said key into said lock cylinder with a control code stored in the comparison means, and output circuit means cooperating with an actuating means; said actuator means having an electro-magnet connected in said output circuit, an armature having a catch opposite a pivot bearing about which the catch may pivot toward and away from said electro-magnet in response to changes in the current flow through said electro-magnet provided by said output circuit, and a door bolt movable to and from engagement with said latch, the bolt having an open position, a latched position, and a caught or locked position, said bolt being moved among its positions by a manually rotatable knob and being immobilized in its locked position by said catch on said armature.