Mischief preventive electronic lock device

Details Mischief preventive electronic lock device Mischief preventive electronic lock device

1982-09-29

1984-10-16

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082556, 361171, H04Q 900, E05B 4900

Patent

active

044778066

ABSTRACT:
A mischief preventive electronic lock device has a mischief prevention system which prevents lock/unlock operation for a given period of time after a pushbutton input unit has been operated extraordinarily often in comparison with usual number of keystrokes required for entry of an input code. The electronic lock device is normally operated to lock/unlock a door matching by the input code with a preset code. The mischief prevention system is adapted to count the number of keystrokes from the input unit to perform the foregoing preventive operation whenever the keystroke count exceeds a predetermined value. The mischief prevention system permits further input after expiration of the given period. This discourages trial-and-error attempts to satisfactorily protect the electronic lock device from mischief.

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