COMPOSITE SEMI-AUTOMATIC ELECTRONIC CODE LOCK Russian patent published in 2000 - IPC

FIELD: electronic code locks, applicable for protection of various systems and objects. SUBSTANCE: code composition and introduction are accomplished by successive pushing of the keyboard keys corresponding to the code. Pulse bursts are shaped, whose number corresponds to the digital symbols of the keys. Automatic distribution of these bursts among the counters of the selection unit is provided by a demultiplexer contained in the unit-shaper. The counter counts up the quantity of the composed code digits. The moment of periodic nullification of the counter comes after introduction of the digit on completion of composition of the next fragment and after a certain interval intended for fixation of the correctness of the composed fragment. EFFECT: enhanced rate of code introduction, enhanced convenience in use, enhanced cryptoprotection. 3 cl, 1 dwg