Electronic combination lock with high security features

Details Electronic combination lock with high security features Electronic combination lock with high security features

E - Fixed Constructions

05

B

E05B 47/00 (2006.01) G07C 9/00 (2006.01)

Patent

CA 2071577

ABSTRACT An electronic combination lock having a self contained power generation capability is further rendered more secure from attempts to open the lock by an unauthorized individual by requiring the checking the conditions of the lock operation against preset requirements so that if the lock is operated in a manner that indicates that the lock is being operated by a manipulator of if the lock is being randomly operated by a person, the lock will refuse to open or becomes inoperable. Conditions that may be checked by the lock and compared to preset standards include: entry of the combination is too short a period of time, the entry of the combination over too long a period of time, the amount of the turn of the dial between stops of the dial, the requirement that the dial remain motionless for a predetermined period of time when the dial is reversed, counting the number of failed attempts to open the lock and signaling an error when a predetermined number is equaled or exceeded, the detection of a dial reversal and the backing up of the displayed number by a set amount to allow the combination number to be approached again without aborting the dialing sequence, counting the number of erroneous attempts and displaying that number to the operator when the lock is properly actuated and the counting of the number of times that the lock has been properly opened and displaying that number upon the proper operation of the lock. These features enhance the security provided by the lock itself.

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