Abstract: An electrified lock system, including a mortise lock with an electrically powered device, a latch bolt and a drive linkage coupling the device to a linkage configured to lock a lever or knob spindle from retracting the latch bolt in an extended neutral position or to allow the latch bolt to be retracted to allow the door to open. The lock includes an electrical contact coupler system to transfer power and control signals between the strike plate of a door frame to the lock. A retraction linkage synchronizes the movement of the coupler system with the latch bolt retraction; when the latch bolt retracts, the coupler system follows suit, retracting into the mortise lock body. A strike plate electrical contact set is within a recess within the door to make electrical contact with the lock coupler system, the electrical contact set connected to an access controller and power supply.

Abstract: An embodiment is an electromechanical door latch system including a latch device configured for motion between a latched position and an unlatched position. A manually actuated mechanical apparatus is coupled to the latch device and configured to move the latch device to the unlatched position in response to force applied by a user to a component of the mechanical apparatus. An electromechanical actuator system moves the latch device to an actuator unlatched position in response to an electrical signal from an access control device. The electromechanical actuator system includes a control module, a motor, and a ball screw drive including a ball screw or threaded nut, with one coupled to the motor shaft and the other configured for connection to a latch mechanism, and at least one recirculating ball circuit including ball bearings for transferring torque from the motor to the ball screw drive.