Electronic locking system for such as radio receivers - has built in security code unit that is activated following power supply disconnection and requires code entry

• Main Authors: HINO, YUJI, TOMOHIRO, RYOU, SANDA, HYOGO, JP
• Format: Patent
• Language: English
• Published: 15.07.1993
• Subjects: ACCESSORIES THEREFOR; ALARM SYSTEMS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE; CALCULATING; CHECKING-DEVICES; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FIXED CONSTRUCTIONS; GENERATING RANDOM NUMBERS; HANDCUFFS; KEYS; LOCKS; ORDER TELEGRAPHS; PHYSICS; REGISTERING OR INDICATING THE WORKING OF MACHINES; SAFES; SIGNALLING; SIGNALLING OR CALLING SYSTEMS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR; TIME OR ATTENDANCE REGISTERS; TRANSMISSION; VOTING OR LOTTERY APPARATUS; WINDOW OR DOOR FITTINGS

An electronic locking system is used to control activation of such as a radio and requires correct code entry. The system has a receiver (2), band selector (3), control unit (4), muting circuit (5), amplifier (6) and loudspeaker. Operation of the receiver circuit is dependent upon a control circuit (9) coupled to a voltage detector (8), code entry unit (11), memory (10), display (12) and connector (14). When the connection of the unit is made the detector (8) is activated. The receiver is only activated when the correct code is entered and successfully identified. ADVANTAGE - Simplified operation. Used for theft protection.