The Kynoch Press: the anatomy of a printing house 1876-1981

The Kynoch Press, which flourished for over a century, had a reputation as one of the foremost printing houses of the period. The strength of the Press lay in its introduction of 19th-century English revival types into Britain during the 1930s. In its latter years the Press was innovative in embracing new opportunities, however, the economic recession of the 1980s forced its closure in 1981. This history of the Kynoch Press is enriched by personal accounts from surviving staff and also contains detailed listings of the types held by the press at every perio

Developments in characterization of resistance spot welding of aluminum

Automotive industry interest in aluminum is growing rapidly in Europe and North America. Resistance spot welding and weldbonding will be key techniques in the volume production of aluminum vehicles. A monitoring system has been developed to collect process data during single-phase alternating current (AC) and medium-frequency direct current (MFDC) inverter resistance welding. Features extracted from the captured data are used to characterize spot welding and to identify a range of process phenomena. Statistical analysis has been applied to investigate the relationship between the extracted features and the conventional physical parameters, e.g., weld size and static tensile strength. Welding trials using both MFDC and AC welding equipment have been carried out using aluminum of different gauges and surface conditions. Results on the Al-Mg alloy AA-5754 have shown that the monitoring methods developed previously for steel do not appear to be generally applicable to aluminum. No single parameter can accurately quantify weld quality. Multiple regression methods can, however, provide good prediction of nugget diameter and static strength. This has proved effective even when only electrical variables are logged, removing the need for measurement of other process signals, e.g., electrode displacement or force