Abstract: A security post assembly consisting of a base tube to be sunk into the ground or other base and a post which fits into the mouth of the tube is lockable by a mortise lock mounted inside the post above ground level. The bolt of the lock protrudes outside the post and into a receiver structure carried on the underside of a cover plate which is hinged to the base tube and which can be swivelled to stand up beside the post. The receiver structure comprises a U-shape flange which fits inside a U-shape guard plate attached to the post.

Abstract: Locking devices for a variety of security purposes utilize a commercially available padlock of rectangular configuration having a sliding bolt (73) which bridges a recess in one side face of the padlock. A housing for this type of padlock is formed on or secured to a hasp (61) or other component which is to be locked to a staple (62). The housing has two wall portions (3, 64) and a foot portion (4) corresponding to the two main flat faces and the recessed side face of the padlock, and the padlock is a sliding fit in the housing. There is a slot (72) for entry of the staple (62) into the recess in the padlock. A guard plate (6) partly closes one end of the housing, in line with the bolt (73).Locking devices are described for locking shutters and doors, particularly on commercial vehicles, and for locking security posts for blocking driveways or roadways.