Mortise lock with multi-point latch system

A method of retaining an end of a vertical rod in a vertical rod door latch latching system comprising:

• providing a vertical rod door latch having a rod with an end, a carrier housing for securing the rod end to an actuator to move the vertical rod door latch between engaged and disengaged positions, the carrier housing having an opening for receiving the rod end and a second opening having a pin anchored therein, the carrier housing having a threaded opening for receiving a set screw, a securing member for mechanically engaging the rod end and having a securing member slot extending transversely therethrough, the pin extending from the carrier housing second opening through the securing member slot to limit movement of the securing member in a direction normal to a longitudinal axis of the rod, and said set screw having threads received in the housing threaded opening, the screw being rotatable;
• rotating the set screw towards the securing member and urging it against the rod end, wherein the set screw applies a force to the securing member;
• and
• urging said securing member against the rod end in response to said force such that said rod end retains the rod in the carrier housing.

An actuator for moving a vertical rod door latch between locked and open positions and retaining said vertical rod door latch therein, the actuator comprising:

• a housing;
• a receiver in the housing having an opening adapted to engage an end of a vertical rod;
• a carrier for securing an end of the vertical rod within the receiver in the actuator housing, the carrier having an opening for receiving the rod end, a securing member in the carrier for mechanically engaging the rod end, said carrier having a threaded opening for receiving a set screw;
• said set screw having threads received in the carrier threaded opening, the set screw being rotatable such that upon tightening of the set screw, the set screw applies a force to urge the securing member against the rod end to retain the rod in the carrier;
• and
• a pin anchored within a second opening of the carrier housing and extending through transverse slot of the securing member to limit movement of the securing member in a direction normal to a longitudinal axis of the rod end as the securing member is urged against the rod end.

A method of retaining an end of a vertical rod in a vertical rod door latch latching system comprising:

• providing a carrier for securing the rod end to an actuator to move the vertical rod door latch between engaged and disengaged positions, the carrier having an opening for receiving the rod end, a securing member for mechanically engaging the rod end, and a screw for urging the securing member against the rod end to retain the rod in the carrier, the screw having at least one indentation around an unthread portion of its periphery, the carrier including a spring having at least one spring surface for bearing against the at least one indentation of the screw;
• rotating the screw towards the securing member and urging it against the rod end, wherein the spring surface is moved alternately outward and inward between contact with the at least one indentation;
• and
• tightening the set screw into a final tightened position of the securing member to retain the rod end in the carrier, wherein the spring moves inward to a detent position where the spring surface bears against the indentation to resist and restrict loosening rotation of the screw.

A method of retaining an end of a vertical rod in a vertical rod door latch latching system comprising:

• providing a carrier for securing the rod end to an actuator to move the vertical rod door latch between engaged and disengaged positions, the carrier having an opening for receiving the rod end, a securing member for mechanically engaging the rod end, and a screw for urging the securing member against the rod end to retain the rod in the carrier, the screw having at least one indentation around an unthreaded portion of its periphery, the carrier including a spring having at least one spring surface for bearing against the at least one indentation of the screw;
• deforming the spring by moving the spring surface out of contact with the at least one indentation of the screw;
• rotating the screw into a tightened final position of the securing member to retain the rod end in the carrier;
• and
• releasing the spring to an undeformed position wherein the spring surface moves into contact with and bears against the at least one indentation of the screw to resist and restrict loosening rotation of the screw.

A set screw retention system comprising:

• a housing for securing a member therein, the housing having an opening for receiving the member to be secured and a threaded opening for receiving a set screw to secure the member in the housing;
• the set screw having an unthreaded shank portion with a plurality of flat surface detent portions around a periphery of the shank;
• and
• a spring having at least one leg bearing against the unthreaded shank portion of the set screw, the spring being moveable to permit a user to rotate and tighten the screw to secure the member in the housing, the spring leg bearing against at least one flat surface detent portion on the shank periphery when the set screw is in a tightened position to apply a force to restrict loosening rotation of the screw, thereby retaining the member in the housing.