Key lock cylinder for possibly contaminated environments

摘要

A key operated rotary core cylinder lock having rotary disc tumblers arranged in a pack with intervening spacer members within a rotary core sleeve normally held against rotation within the lock casing by a locking bar which spans the shear line between the disc tumbler peripheries and the confronting wall of the rotary core sleeve or shell. Gates are provided in the disc tumblers to be aligned by an appropriate key with the locking bar for releasing the plug for rotation, and the spacer members are of a truncated triangular cross-sectional configuration having rounded corners bearing against and positioned by the cylindrical bore in the core sleeve and have flat side portions between the rounded corners and larger radius center openings than the radii of the key openings in the disc tumblers to provide spaces for accommodating foreign matter contaminants. Exposed shackle padlocks incorporating such rotary core cylinder lock components are also disclosed.