ELECTRONIC KEY AND LOCK Russian patent published in 1998 - IPC

FIELD: locking devices. SUBSTANCE: this relates to devices intended for protection of objects from unauthorized access. Electronic lock can be installed in door of protected premise, in safe, motor vehicle. Electronic key stores certain number of different codes needed for opening of similar-type locks with various codes of user. Device functions so that change of lock code is effected by pressing code changing button with actuation of digital noise generator. In this case, code remains inaccessible for user or other person. Lock opens after its code coincides with code received from key from some distance by means of infrared radiation or by other means. Codes can be copied by user from identification unit of lock to identification unit of key and vice versa by operating with connector or system of optical radiators and receivers. In given version of usage, codes can be copied from identification unit of one key to identification unit of other key. Aforesaid advantages can afford wide potentialities, such as transmission of code to authorized person with subsequent cancelling of this code, or giving same code to different locks. EFFECT: high efficiency. 2 dwg