Latch bolt strike lock

In combination, a door lock containing a door lock, which is for mounting in a door, said lock bolt having a flat side, having a bolt locking recess in said flat side, being movable between extended and retracted positions, and being capable of engaging the recessed portion of a door jamb when the door is closed and said lock bolt is in the extended position, a door striker plate, for attachment to a door jamb, said striker plate having an opening therein corresponding to the recessed portion of the door jamb to allow entry of said lock bolt, and a locking plate attached to said striker plate so as to be reciprocal between a first position wherein said locking plate does not engage said bolt locking recess in said lock bolt and a second position wherein said locking plate engages said bolt locking recess in said lock bolt to thereby prevent undesired retraction of said lock bolt, said locking plate being horizontally reciprocal between said first position and said second position, and said horizontally reciprocal locking plate being actuated by a vertically reciprocal locking actuator attached to or mounted in or on said striker plate.

In combination, a door striker plate, for attachment to a door jamb having a recessed portion, said door striker plate having an opening therein corresponding to the recessed portion of said door jamb, when said door striker plate is attached to said door jamb, to allow entry of the lock bolt of a door lock mounted in a door, and a locking plate attached to or mounted in or on said striker plate so as to be reciprocal between a first position wherein said locking plate does not engage said bolt locking recess in said lock bolt to thereby prevent undesired retraction of said lock bolt, said locking plate being horizontally reciprocal between said first position and said second position, and said horizontally reciprocal locking plate being actuated by a vertically reciprocal locking actuator attached to or mounted in or on said striker plate.