Abstract: A key-operated remotely monitorable locking assembly including a key-operated lock including a lock body including a key operated locking assembly and a tamper monitorable lockable assembly which is selectably locked to the lock body by operation of the mechanical key operated locking assembly and a wireless communication circuit located in a least one of the lock body and the lockable assembly for providing a remotely monitorable indication of tampering with the lockable assembly.

Abstract: A remotely monitorable selectably removable lock assembly for a fluid valve assembly of a bottled gas canister or other fluid valve assembly, the remotely monitorable, selectably removable, lock assembly including a lockable cover assembly configured for lockable engagement with a fluid valve assembly, a remote monitoring unit fixedly mounted to a locking shaft, arranged for lockable engagement with the lockable cover assembly when the lockable cover assembly is in a closed operative orientation, preventing unauthorized access to the fluid valve assembly and a locking unit which is operative for locking engagement with the locking shaft for retaining the cover assembly in the closed operative orientation, the remote monitoring unit having wireless communication functionality enabling it to communicate with a remote monitoring station for providing monitorable indications both of tampering and of authorized unlocking of the locking unit from the locking shaft.

Abstract: A monitorable locking system for a truck cargo compartment closing cable including a cable engagement assembly arranged to selectably retain cable ends in mutually locked engagement, a monitorable locking element assembly and a mechanical lock for locking engagement with the monitorable locking element assembly via the cable engagement assembly, thus locking the cable ends in mutually locked engagement.

Abstract: A remotely monitorable electronic locking device for use with a device including a conductive loop, the remotely monitorable electronic locking device including a locking element arranged to engage at least one end of the conductive loop, whereby disengagement of the locking element and the end of the conductive loop results in a monitorable event and a wireless communicator associated with the locking element operative to provide a remotely monitorable indication of the monitorable event.

Abstract: A key-operated remotely monitorable locking assembly including a key-operated lock including a lock body including a key operated locking assembly and a tamper monitorable lockable assembly which is selectably locked to the lock body by operation of the mechanical key operated locking assembly and a wireless communication circuit located in a least one of the lock body and the lockable assembly for providing a remotely monitorable indication of tampering with the lockable assembly.

Abstract: A key blank including a generally elongate shaft portion defining a key combination surface adapted to have formed thereon key cuts which define a key combination, the key blank including a movable pin element retained within the elongate shaft portion, the movable pin element being displaceable in a single direction, outwardly from the key combination surface.

Abstract: A key blank including a generally elongate shaft portion defining a key combination surface adapted to have formed thereon key cuts which define a key combination, the key blank including a movable pin element retained within the elongate shaft portion, the movable pin element being displaceable in a single direction, outwardly from the key combination surface.

Abstract: A vehicle anti-theft device comprising a gear shift lock and an ancillary vehicle anti-theft device which is operated automatically by operation of the gear shift lock.

Abstract: A key blank including a generally elongate shaft portion defining a key combination surface adapted to have formed thereon key cuts which define a key combination, the key blank including a movable pin element retained within the elongate shaft portion, the movable pin element being displaceable in a single direction, outwardly from the key combination surface.

Abstract: A vehicle anti-theft device comprising a gear shift lock and an ancillary vehicle anti-theft device which is operated automatically by operation of the gear shift lock.

Abstract: A cylinder guard including a plurality of guard plates, at least one of which is formed with a plurality of non-rotatable bolt head seats and a plurality of bolts having heads non-rotatably seated in the non-rotatable bolt head seats and arranged for mounting the cylinder guard onto a door.

Abstract: A cylinder lock including a housing and a plug disposed in the housing and arranged for rotation relative thereto, a first plurality of chambers formed in the housing and a second plurality of chambers formed in the plug and arranged such that each one of the first plurality of chambers extends coaxially with a corresponding one of the second plurality of chambers, when the plug is in a first rotational orientation relative to the housing, a first multi-element pin assembly being disposed in said first plurality of chambers and a second multi-element pin assembly being disposed in said second plurality of chambers, the first multi-element pin assembly including an outer pin element having an axial recess and an inner pin element disposed for selectable axial orientation relative to the outer pin element and apparatus for retaining the inner pin element against disengagement from and undesired misalignment with respect to the outer pin element.

Abstract: A pin tumbler lock comprises a cylindrical shell, a plug fitted within the shell, and rotatable by key means. The plug has first bores for receiving first pin tumblers. The first bores are substantially normal to the axis of the plug. The shell has second bores for receiving second pin tumblers therein. The second bores are aligned with first bore. First and second pin tumblers are located in bores. The second pin tumblers are forced by a spring into the aligned first bores to thereby prevent rotation of the plug. The first and second pin tumblers have substantially mating surfaces at respective ends providing contact along their entire length. The plug includes two grooves in a plane normal to the axis of the plug along its periphery, one groove on each side adjacent to first bores, thereby providing a non-linear shear line between the plug and the shell.