US Patent 11851925 Key override for electromechanical multi-point latching device

A multi-point latching device may include a mortise lock and one or more remote latches which are operable with a handle. The mortise lock may include a handle lock which selectively locks and unlocks the handle is independently controllable by an actuator and by a lock cylinder. The lock cylinder may be used to unlock the handle during power failure events where the mortise lock is put into a fail secure state, such that the mortise lock maintains normal functionality as a manual device.