Lock with deadlocking latchbolt

Claim 1

IN A MORTISE LOCK OF THE CLASS DESCRIBED, A SPRING PROJECTED LATCHBOLT, A DOG FOR DEADLOCKING SAID LATCHBOLT, A TRIGGER BOLT FOR CONTROLLING SAID DOG, A DEADBOLT, A CAM FOR MOVING SAID DEADBOLT BETWEEN RETRACTED AND PROJECTED POSITIONS, SAID DEADBOLT BEING EQUIPPED WITH MEANS ACTUATED BY SAID CAM FOR LOCKING SAID DEADBOLT IN A PROJECTED POSITION, A LATCH LEVER PIVOTED ON THE DEADBOLT AND ROTATABLE ON ITS PIVOT BY SAID CAM FOR RETRACTING THE LATCHBOLT, A KNOB ACTUATED RETRACTOR, MEANS WHEREBY THE KNOB ACTUATED RETRACTOR RETRACTS THE LATCHBOLT WHILE ALSO ROTATING SAID LATCH LEVER, AND MEANS THROUGH WHICH THE LATCH LEVER ACTS FOR MOVING THE DEADLOCKING DOG TO TO RELEASE POSITION WHEN THE LATCH LEVER IS ROTATED BY THE KNOB ACTUATED RETRACTOR OR THE CAM WHILE THE DEADBOLT IS IN RETRACTED POSITION.