Abstract: Ceramic electrodes of cadmium germanate and other ternary oxide materials, provide electrodes for secondary battery cells. Open circuit voltages of 1.5 volts are attainable. The absence of crystallographic phase changes on charge/discharge is noted and renders possible the use of solid electrolytes, possibly in a unitary ceramic structure.

Abstract: A ceramic of known composition exhibiting superconductivity below a critical temperature is caused to exhibit superconductivity or superconductor-like behaviour at room temperature by the application of an electrochemical potential. The effect is believed to arise from an increased population of the monovalent state of copper and other methods are proposed for creating such a population without cooling.

Abstract: A sensing device incorporating a sensing element and terminals for making electrical connection to the device is manufactured by placing the sensing element and the terminals in a mould and injection moulding a plastics body around them. The integral plastics body firmly bonds the parts of the device together and is shaped outwardly with a screw thread and a hexagonal nut portion--for example--so that the device can be screwed into a threaded aperture in a chamber wall. One application is a temperature indicator screwed into an automobile engine block.

Abstract: An engine temperature sensor may be screwed into the engine block and is provided internally with electronic switch circuitry controlled by an NTC device. The sensor has external terminals for connecting to various temperature-related functions in the engine, such as an automatic choke, a petrol pre-heating device and an overheating indicator, and is capable of switching these functions on and off individually at the temperatures which have been pre-set for each function.