Rotary disc-tumbler lock cylinder - has cylinder removable mounted in lock body to allow inter changing of cylinder to increase security

摘要

In a lock cylinder having a body with a circular cylindrical longitudinal opening a core assembly is removable from the body. The core assembly has a flange on one end and is insertable into the body until the rear of the flange confronts the face of the body. A cylindrical counterbore, whose central axis is coincidental with the central axis of the cylindrical opening, is formed part way into the body. The diameter of the counterbore is greater than the dia of the opening and less than the dia. of the flange. The counterbore provides space for a front sidebar retainer with the core assembly fully inserted.