Abstract: Some embodiments can include a barbed tape stack formed from a planar strip of flexible material and comprising a plurality of barbs disposed therealong, said barbs being sufficiently resilient so as to impede, by entanglement with or otherwise, the passage of an object therepast. The tape is folded in concertina-like folds to form a stack. Apparatus for deployment of barbed tape stacks is also disclosed.

Abstract: In some embodiments, a barbed tape can be formed from a planar strip of flexible material and include a plurality of barbs disposed therealong, the barbs being sufficiently resilient so as to impede, by entanglement with or otherwise, the passage of an object therepast. Apparatus for deployment of barbed tape is also described.

Abstract: Some embodiments relate to an access point security unit which, when deployed, provides a hindrance for passing through an access point. Such a unit includes a deployment apparatus and a plurality of lengths of barbed strip material which can be moved between a stowed position, in which the access point is not obstructed by barbed strip material and a deployed position, in which the plurality of lengths of barbed strip material lie across the access point. In the deployed position, the barbed strip material is, in some embodiments, fully enclosed unless the access point is breached.

Abstract: Some embodiments are directed to a barbed tape formed from a planar strip of flexible material and including a plurality of barbs disposed therealong, the barbs being sufficiently resilient so as to impede, by entanglement with or otherwise, the passage of an object therepast. In some aspects, the tape incorporates a crease in a central portion thereof, which acts to provide stiffness to the tape. In other aspects, the tape incorporates a fold such that the barbs overlie a central portion of the tape. Apparatus for shaping and deploying barbed tape are also disclosed.

Abstract: A load-limiting device is formed from a length of wire with a coil at each end defining eyes by which the device can be connected into a system adapted to be loaded in tension. The coils are of different diameter and the larger diameter coil is adapted to unwind by plastic deformation of the wire when the device is subject to a tensile load of a predetermined magnitude. The use of such devices in a system for deploying a vehicle arresting device across a roadway is also described.

Abstract: A system for deploying a vehicle arresting device (1) of the type comprising a net (3) or other flexible substrate intended to lie flat upon the ground with an array of upwardly-directed spikes (4) attached along its leading edge, and which is adapted to arrest a vehicle by penetrating and wrapping around its front tyres and pulling tight under the vehicle to stop further rotation of the wheels. The device is deployed across a road (2) from a folded condition on one side of the road through cables (6) and (7) attached to one side edge and wound in by a winch (5) on the opposite side of the road, while its other side edge is anchored by lanyards (12) and (13) on the first side of the road. The cables and lanyards each extend from the device at divergent oblique angles. The lanyards are themselves anchored to the ground at positions (14) and (16) spaced from the device so that it can self-correct in the fore and aft direction during deployment through arcuate movement of the lanyards about their anchor points.

Abstract: A vehicle arresting device (1) comprises a net (2) of circular or polygonal planform adapted to lie flat on the ground in the path of a vehicle (14) to be arrested, with one or more rows of upwardly-directed spikes (6) attached to the net around its outer periphery. When a vehicle runs over the device, from any relative angle of approach, some of the spikes become imbedded in its front tyres and the net is caused to, wrap around the front wheels, the portion of the net between those wheels being pulled tight under the vehicle so that the tension in the net prevents further rotation of the wheels and the vehicle is brought to a stop. A deployment method for the device is also described where it is dropped in a folded condition from a helicopter or other aircraft or from a road vehicle into the path of a target vehicle and unfolds automatically on the ground.

Abstract: A vehicle arresting device comprises a net intended to be laid flat on the ground in the path of a target vehicle with an array of upwardly-directed spikes attached to the net along a leading portion, so that when a vehicle runs over the device some of the spikes engage in its front tires and the net is caused to wrap around the front wheels, being pulled tight under the vehicle to prevent further rotation of those wheels. There are two rows of spikes, with the spikes in the second row being substantially longer than the spikes in the leading row. The gauge of the netting also varies, with the leading strip which includes the shorter spikes and back towards the longer spikes being of a thinner gauge, the portion from the longer spikes back to approximately the mid length of the net being of a thicker gauge, and the trailing portion reverting to the thinner gauge. These measures help to ensure that the net is capable of arresting a wide range of vehicles, from passenger cars to trucks.

Abstract: A vehicle arresting device comprises a net intended to be laid flat on the ground in the path of a target vehicle with an array of upwardly-directed spikes attached to the net along a leading portion, so that when a vehicle runs over the device some of the spikes engage in its front tires and the net is caused to wrap around the front wheels, being pulled tight under the vehicle to prevent further rotation of those wheels. There are two rows of spikes, with the spikes in the second row being substantially longer than the spikes in the leading row. The gauge of the netting also varies, with the leading strip which includes the shorter spikes and back towards the longer spikes being of a thinner gauge, the portion from the longer spikes back to approximately the mid length of the net being of a thicker gauge, and the trailing portion reverting to the thinner gauge. These measures help to ensure that the net is capable of arresting a wide range of vehicles, from passenger cars to trucks.