IMPROVEMENTS IN KEY OPERABLE LOCKS

摘要

A keyway profile plug (14) for a lock barrel assembly of the type having a number of rotatable disks (24) with the combination of the lock being carried by the key and a locking bar (118) which cooperates with the disks, wherein the keyway profile plug has a longitudinal axis; a partially arcuate circumference transverse to the longitudinal axis, the circumference being adapted to support the plurality of disks and a plurality of grooves in the circumference, each groove adapted to receive spacer means. An end cap (114) for the above lock barrel assembly which is operable by a first key (134), but the cap is adapted to be released from the lock barrel assembly by use of a second key (145) but not by the first key, where the second key is converted from the first key by moveable means provided on the key.