Abstract: A fuel cell apparatus comprises fuel cells, hydrogen generators and a control unit. A fuel cell array comprises a plurality of membrane electrode assemblies (MEAs) each having a major planar surface; the MEAs are arranged such that a first surface of a first MEA which is not a major planar surface of the first MEA faces a second surface of a second MEA which is not a major planar surface of the second MEA. A plurality of fuel cells, for example arranged in an array, are included in a blade, which is connected externally to the control unit. The apparatus can accommodate a plurality of blades. A closed reactor for the generation of hydrogen gas from a chemical hydride comprises a reaction vessel; at least one entry port; and an outlet port for outputting hydrogen gas. A unit form of a composition comprises a chemical hydride; the unit form has a volume of at least 0.01 cm3.

Abstract: An optical fiber cable has a kingwire (10) provided with inner and outer extruded layers (12, 18) of a thermoplastic elastomer. A plurality of optical fibers (14) are disposed on the outer surface (16) of the inner layer (12) and are embedded in the outer layer (18). The cable is constructed by extruding a thermoplastic elastomer around a kingwire, setting the elastomer layer, laying a plurality of optical fibers along the set elastomer layer and extruding a further layer of thermoplastic elastomer over the fibers.

Abstract: An optical fiber cable package has a kingwire and a plurality of acrylate primary coated optical fibers all embedded in a one-shot extrusion of low melting point plastic, e.g. Hytrel 40. The fibers have a zero angle of lay. The package is particularly but not exclusively suitable for use in an optical fiber submarine cable.

Abstract: A design of plastics packaged glass optical fibre in which the plastics packaging consists of a urethane acrylate primary coating, a silicone rubber secondary coating and a nylon tertiary coating, the three coatings coacting to provide a pair of substantially decoupled mechanical filters.

Abstract: An injection mold for coaxial cable joints comprises a longitudinally split inner sleeve of duralumin which is placed around the cable joint and a longitudinally split outer jacket of steel. The outer jacket has a bore closely fitting the inner sleeve. The two halves of the outer jacket are readily assembled and disassembled by the use of axially engaging dovetails. The sleeve and jacket have cooperating filling and vent holes and the outer jacket is formed with integral heating and cooling channels.