Automatic locking-deadbolt assembly in a door

A lock assembly, comprising:

• a lock body comprising a housing;
• first and second deadbolts operatively coupled with respective first and second actuators supported in the housing, said first and second deadbolts supported for linear movement between respective retracted and extended positions and coupled for simultaneous movement between the respective retracted and extended positions and so coupled that movement of the second deadbolt from the retracted to the extended position is blocked when the first deadbolt is held in its retracted position;
• a spring mounted in the housing and biasing the first deadbolt toward its extended position;
• and
• a trigger mechanism mounted on the door for engagement with a door jamb upon closure of the door, said trigger mechanism in direct contact with one of the second and first deadbolts and adapted to hold the one of the second and first deadbolts in the retracted position in opposition to a spring bias when the door is open, and to permit movement of the one of the second and first deadbolts to the extended position upon engagement of the trigger mechanism with the door jamb;
• wherein the trigger mechanism includes:
• a base plate and an upper plate connected in a spaced apart and parallel relation,
• a locking plate received between the base plate and the upper plate and pivotable between an upper position and a lower position, and
• a trigger plate positioned over the locking plate and configured to cause pivoting of the locking plate from the upper position to the lower position in response to engagement of the trigger plate with the door jamb,
• said base plate, upper plate, locking plate and trigger plate respectively provided with apertures which are aligned for slidingly receiving the one of the second and first deadbolts therethrough;
• wherein in the upper position of the locking plate, the one of the second and first deadbolts is held in the retracted position by engagement with an edge of the aperture of the locking plate;
• and in the lower position of the locking plate, movement of the one of the second and first deadbolts through the apertures from the retracted to the extended position is permitted.

A lock assembly for a door, comprising:

• a lock body having a housing;
• a first deadbolt operatively coupled with a first actuator supported in the housing, said first deadbolt supported for linear movement between a retracted position and an extended position and biased toward the extended position by a spring force of a spring mounted in the housing;
• and
• a trigger mechanism mounted on the door for engagement with a door jamb upon closing of the door, said trigger mechanism in direct contact with the first deadbolt and adapted to hold the first deadbolt in the retracted position when the door is open in opposition to said spring force, and to permit movement of the first deadbolt to the extended position upon contact of the trigger mechanism with the door jamb;
• wherein the trigger mechanism includes a movable locking plate and a movable trigger plate which are arranged in an adjustable spaced-apart relation, the trigger plate being selectively adjustable to contact the door jamb and move the locking plate to a disengagement position which is orthogonal or substantially orthogonal to the first deadbolt, thereby enabling the linear movement of the first deadbolt to the extended position;
• and
• the trigger plate configured to movably disengage from the door jamb when the door is in an open state and further enable the locking plate to move to a locking position which is angled with respect to the first deadbolt so as to immediately lock the first deadbolt in the retracted position.