Abstract: A battery having at least one electrochemical cell, comprises a negative electrode, a positive electrode, and a solid electrolyte between and in contact with the electrodes. There is dispersed in the solid electrolyte (6) a material that is reactive with one of the electrodes. But the electrolyte in contact with that one electrode is free from this material.

Abstract: A solid polymer electrolyte for a solid state electrochemical cell comprises a complex of a solid polymer such as poly(ethene oxide) and an alkali metal salt such as LiClO.sub.4, which polymer is capable of forming donor: acceptor type bonds with alkali metal ions and is capable of conducting alkali metal ions, the complex being associated with a mixture of more than one 1,3-dioxolane-2-ones, for example ethylene carbonate and propylene carbonate, such that the electrolyte possesses satisfactory ambient temperature ionic conductivity (e.g. 10.sup.-3 to 10.sup.-4 ohm.sup.-1 cm.sup.-1) and a cell including the electrolyte substantially maintains its discharge capacity at ambient temperature after repeated charge/discharge cycling.

Abstract: Electrical circuits can be built up in three dimensions by using spacers which interlock together to define stacks. Stacks can be used to clamp together chip carriers between adjacent spacers or to provide power and signal transmission stacks which have a number of continuous tracks. Link members are used to provide electrical connection means between the chip carriers in the chip carrier stacks and the tracks of the power and signal transmission stacks.

Abstract: A connector assembly which enables conductive paths of a first body to be electrically connected to the conductive paths of a second body. The assembly comprising:at least two spigot members; anda connecting member having a cover member into which a resilient member and a displaceable member are assembled.Each of the members of the connecting member are provided with corresponding orifices that form a passageway which is shaped so that it can engage with a groove formed on a respective spigot member. In operation, the spigot members are inserted into a respective passageway and the connecting member moved relative thereto so that the groove and passageway co-operate with one another to clamp the first and second bodies together, and thereby effect electrical connection between the respective conductive paths.

Abstract: A material which is particularly suitable for use in a composite cathode and which includes a complex of a salt formed between a metal ion capable of existing in at least two stable valency states or an aluminium ion together with a suitable anion and a solid plastics polymeric composition capable of forming a donor acceptor type bond with the metal or aluminium ion, wherein the material exhibits both ionic and electronic conductivities to a substantial degree.

Abstract: Electrical circuits can be built up in three dimensions by using spacers (20, 20') which interlock together to define stacks. Stacks can be used to clamp together chip carriers between adjacent spacers or to provide power and signal transmission stacks (120) which have a number of continuous tracks (110). Link members (126, 128) are used to provide electrical connection means between the chip carriers in the chip carrier stacks and the tracks of the power and signal transmission. stacks.

Abstract: A circuit assembly includes a mounting structure 10 having walls 11-13, 20 with conductor strips 19 running along the length of the structure. Plate members 14 carrying components such as integrated circuits 16 have conductive areas 18 which contact the conductor strips 19 when the members are inserted into the structure 10. The walls may include slots 15 into which the plate members 14 are slidably engaged. The support structure 10 thus provides physical support for the members 14 as well as electrical interconnection therebetween. Cooling arrangements for the assembly can include apertures 21 in the walls, and/or finning 22.