COMBINATION ELECTRONIC-CODING LOCK Russian patent published in 1999 - IPC

FIELD: locking devices. SUBSTANCE: this is intended for protection of various objects from unauthorized access. Device has following components: unit of selectors-multiplexers, beat counters, delay elements, counter of true selections, switch of code depth level, and setter for permissible level of searching depth. In operation of device, unit for selection of several digits which create fragment of code is used multiple times. Fixed in each beat is proper selection of current fragment by means of coincidence circuit and counter of true selections. If after given selection n, logical unit occurs at decoder output n of counter of true selections, then operating unit releases lock, and then beat counter by rear front of signal n is switched to one of conditions. In this case, clearing signal goes through reset bar of control counters, and device returns to initial condition. Application of aforesaid embodiment of lock allows for using smaller number of components together with enhancing reliability of functioning. EFFECT: higher efficiency. 1 dwg