Portable security locks

A portable security lock for a hinged door, the door being latched to a door jamb by a bolt which projects into a keeper opening through a strike plate on the door jamb, the keeper having a vertical edge adjacent to the opening which vertical edge faces away from the opening direction of the door, the portable security lock comprising:

• a base plate having a first end and a second end, a hook portion disposed at the first end of the base plate and adapted to enter the keeper opening through the strike plate and engage with the vertical edge;
• a web portion of the base plate having a length sufficient to protrude a selected distance beyond the door jamb and a closed door when the hook is engaged with the edge of the keeper;
• a pivot disposed at the second end of the base plate;
• a latching plate pivoted at a first end thereof on the pivot to rotate toward and away from the door when the portable security lock is mounted on the door jamb to allow the door to clear the portable security lock when the door is being closed;
• a locking foot at a second end of the latching plate, the locking foot adapted to engage the door when the door is closed upon the latching plate being pivoted toward the door;
• a slider linearly slidably mounted on the latching plate, the slider having a detent thereon for sliding into engagement with a locking surface of the base plate to lock the latching plate to the base plate and hold the locking foot on the latching plate in locking engagement with the door.