METHOD AND DEVICE FOR OPENING OF LOCK Russian patent published in 1997 - IPC

FIELD: hardware articles. SUBSTANCE: this relates to locking devices which are opened by keys. Before opening of lock, key is heated in key hole. Determined is distribution of thermal radiation intensity over key surface and this distribution is compared with primary standard characteristic. In case of coincidence, signal is sent for opening of lock. Lock which is opened by this method has locking mechanism, key, set-point device, signal receiver and analyzer connected to signal receiver and locking mechanism. Key is deliberately made with internal defects, set-point device is made in the form of heat source, and signal receiver is in the form of thermal radiation intensity indicator. Given method of opening of lock substantially enhances degree of lock secrecy. EFFECT: high efficiency. 2 cl, 2 dwg