Electronic combination lock with high security features
First Claim
Patent Images
1. An electronic combination lock comprising a dial means for inputting combination elements;
- generator means driven by said dial means for powering said electronic lock and for converting said inputting of said combination elements into electrical signals;
microprocessor means for receiving said signals and for utilizing said signals to control the operation of said microprocessor;
display means for displaying, to an operator, numbers to be incremented and decremented to enter numerical elements of the combination into the lock;
said microprocessor further comprising means for timing the period from the time said microprocessor is activated until said combination has been entered;
means for storing a value defining a predetermined time period selected as the longest acceptable time period within which said combination may be entered into said lock;
means for comparing said period to said predetermined time period; and
means responsive to said means for comparing to condition said lock to not unlock when said period is greater than said predetermined time period.
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Abstract
An electronic combination lock includes a combination lock having a dial with no markings thereon. Rotation of the dial drives a generator which produces electrical pulses. The voltage pulses serves as a power source for the electronics of the lock. The lock also includes a security feature to disable the lock if the combination dial is stopped between dial rotations for a period of time which indicates dialing by an automatic dialer.
28 Citations
7 Claims
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1. An electronic combination lock comprising a dial means for inputting combination elements;
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generator means driven by said dial means for powering said electronic lock and for converting said inputting of said combination elements into electrical signals; microprocessor means for receiving said signals and for utilizing said signals to control the operation of said microprocessor; display means for displaying, to an operator, numbers to be incremented and decremented to enter numerical elements of the combination into the lock; said microprocessor further comprising means for timing the period from the time said microprocessor is activated until said combination has been entered; means for storing a value defining a predetermined time period selected as the longest acceptable time period within which said combination may be entered into said lock; means for comparing said period to said predetermined time period; and means responsive to said means for comparing to condition said lock to not unlock when said period is greater than said predetermined time period. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification