Abstract: A magnetic bolt has a movable and electromagnetically operable locking member which, in conjunction with a locking part arranged on the rotor of a lock cylinder, blocks or releases the rotor, independently of the mechanical tumblers depending on whether the locking member is located in a free-running slot or a locking notch of the locking part. The magnetic bolt is arranged in a recess in the lock cylinder stator and provides an electromagnetic locking operation by energizing a field coil.

Abstract: The device consists of an inspection glass (3) inserted in the door (1), a semi-transparent mirror (5) which is arranged inclined behind the inspection glass (3) and which faces the inspection glass (3) with the semi-reflecting side (6), and an optical receiver (7) which is located in the axis of reflection of the mirror (5).The invention is used in the building industry.

Abstract: The present invention relates to a system that inherently manages the issuance and return of selected articles such as keys, tools, and the like to a retaining or central station. Of prime importance with respect to the present invention is the fact that the system encourages the return of the removed article. More particularly, the system comprises a retaining station where the selected articles are normally maintained in a locked state. An unlocking key is provided for unlocking selected articles in order that the articles may be removed from the retaining station. To encourage the return of removed articles, the retaining station is provided with a key holding and locking assembly for retaining the unlocking key until the removed article has been returned back to the retaining station and placed in the locked mode.

Abstract: An electronic door locking system for an automotive vehicle with which vehicle doors can be locked, by depressing a proper push-button type switch representative of a predetermined door-locking digit, only when an ignition key is brought near the switch. Therefore, it is possible to lock vehicle doors without leaving the ignition key in the keyhole, with the result that the vehicle can be prevented from being stolen by a thief when parked. The electronic door locking system according to present invention comprises means for detecting the presence of the ignition key brought near the switch and an AND gate for passing a locking command signal to a door lock/unlock actuating solenoid only when the presence of the key is detected, in addition to the conventional electronic door locking system.