Lock with key slot manipulation barrier

Details Lock with key slot manipulation barrier Lock with key slot manipulation barrier

1978-09-28

1980-08-05

Wolfe, Robert L.

Locks

Operating mechanism

Key

70375, E05B 6300

Patent

active

042155576

ABSTRACT:
A rotatable lock plug having a key slot formed entirely axially therethrough has a barrier secured in the lock plug adjacent the key slot inner end between an inner end of a key received in the key slot and a torque blade operably connected to the lock plug inner end for providing a barrier denying surreptitious access through the key slot. The barrier has edge portions received in appropriate lock plug recesses and preferably a flat portion transversely spanning the key slot. In one form, the barrier may be an axially slotted pin receiving the key end within the slot, and in other forms may be edge secured, flat plates.

REFERENCES:
patent: 1422519 (1922-07-01), Augenbraun
patent: 3319443 (1967-05-01), Perlick
patent: 3410123 (1968-11-01), Jacobi

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