Reduced indicia high security locks

Details Reduced indicia high security locks Reduced indicia high security locks

1991-08-05

1993-12-28

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082531, 341 23, H04Q 100

Patent

active

052743705

ABSTRACT:
Reduced indicia keyboards for, and high security locks utilizing, key entry of a selectable lock code using a number of keys for the entry of each code element, which number of keys is less than the number of possible variations of that code element. Associated with each key is a code element display, viewable only by one operating the lock, to identify which particular value or variation of the code element is associated with that key at any particular time. By varying the association of the keys and the variations in the code elements, the sequence of key depressions and other observations with respect to the operation of the system without knowledge of the specific indicia associated therewith makes such observations useless in later attempting to operate the lock. Embodiments and methods of operating the same include a number of keys for entry of each code element which is less than the number of variations of that code element, the directional code element display or displays for viewing only by the user, and the non-repetitive and unpredictable operating order of the invention.

REFERENCES:
patent: 3812403 (1974-05-01), Gartner
patent: 4479112 (1984-10-01), Hirsch
patent: 4573046 (1986-02-01), Pinnow

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