LEVER HANDLE CONTROLLER FOR MORTISE LOCK

摘要

A free-wheeling lever handle controller (12, 14) for operating a mortise lock (10) provides free-wheeling functionality while maintaining the full operational characteristics of various mortise lock functions. A lock mode receiving mechanism connectable to the lock output (52) is used to detect the unlocked and locked conditions of the mortise lock (10), and correspondingly engage and disengage the free-wheeling mechanism. The free-wheeling mechanism has a split shaft (46) connected between a handle (30) on the controller (12) and a handle input (50) on the mortise lock (10). The two halves of the shaft (46) may be coupled and uncoupled via a shaft lock (110) movable perpendicular between locked and unlocked positions. In the unlocked position the shaft lock (110) connects the two halves of the shaft (46) to rotate together when the handle (30, 60) is turned. In the locked position the shaft lock (110) disengages the two halves of the shaft (46) to rotate separately and allow the handle (30, 60) to free-wheel when operating the door latch (90). The shaft lock (110) is moved by the lock slide/cam (200, 204) couple of the lock mode receiving mechanism, which converts the rotational motion of the lock output (52) into linear motion of lock slide (200), such that whenever the mortise lock (10) is locked, the handle controller (12, 14) free-wheels.