Cylinder lock with tumbler plates

摘要

A lock core rotatable in a housing is formed with an axially extending key passage, transverse guide slots, and an axially inwardly open bore. A bolt displaceable in the bore between a locked position and a unlocked position has radially open grooves aligned with the slots in the locked position. The inner bolt end can directly engage in an inwardly open seat formed in the housing or with a ball engageable in such a seat to lock the core in the housing. Tumbler plates in the slots are formed with control edges and holes alignable with the bore in a freeing position. The plates are displaceable into blocking positions with the holes offset at least partially from the bore and engaging in the respective grooves. A key has a plurality of respective bit notches engageable with the control edges on engagement of the key in the passage.