Mortise door lock has at least one and pref two spring bolts with swing arms to connect the bolt carriers to give one setting with projecting bolt heads and a setting with the projecting bolt for increased security

摘要

The mortise lock, for a door and the like, has at least one spring bolt (21) with a wedge-shaped head and a connected bolt. In the ready setting, only the head section projects from the lock plate (11). In the locked setting, the bolt section also projects from the lock plate (11). One follower (31) takes the square shaft of the door handle, to operate the first spring bolt (21), with a swing arm (41) to link the second carrier (32) with a carrier arm (42) for the second spring bolt (22).