Replaceable single case security lock closing mechanism - has triangular case section with multiple pin rows, and single row section

摘要

The appts. is for use in a lock with a single case. The closing unit affords increased security against forcible opening, and can replace standard security locks without involving replacement of the whole lock assembly. The closing unit case is formed with a simple closing cylinder with only one row of pins (2), on one side (1). On the other side it has a triangular case piece with several rows of pins (4), for activation by a security key with several rows of teeth. This case piece can be widened on both sides, from a bottom row of pins arranged as a straight continuation of the row on the other piece.