Abstract: A heat recoverable article for sealing splices having substrates of disparate size. The heat recoverable article includes a first heat shrinkable sleeve having an adhesive which extends over at least part of its interior surface and a second heat shrinkable sleeve which overlaps an end of the first sleeve. The second sleeve begins to recover before the first sleeve and holds the first sleeve in place as recovery continues, eliminating milk off.

Abstract: An induction heater for heating a portion of a load comprises a side entry coil driven by a source of alternating current, with a flux concentrator located at the coil opening. The coil produces a magnetic field in the region occupied by the flux concentrator and the heated portion of the load. The flux concentrator extends along the opening of the coil and is fabricated of high permeability, low loss material, such as nickel-zinc ferrite, so as to enhance the uniformity of the magnetic field generated within the coil. In the preferred application, heating produces a complete fluid block in a cable section within the coil without overheating or damaging the cable.

Abstract: Annular tube-like driver for insertion into a tube insert which in turn is inserted into a tube. The driver is made of a shape-memory alloy which is capable of placing the tube insert in firm engagement with the inside of the tube.

Abstract: Annular tube-like driver for insertion into a tube insert which in turn is inserted into a tube. The driver is made of a shape-memory alloy which is capable of placing the tube insert in firm engagement with the inside of the tube.