William McNaught (Glasgow)
William McNaught (1813–1881) was a Scottish engineer, from Glasgow, who patented a compound steam engine in 1845. This was a technique of improving the efficiency of a standard simple Boulton & Watt beam engine. The engine was compounded by adding a high-pressure cylinder between the support column and the flywheel, on the side opposite the low-pressure cylinder. This improvement could be retrospectively fitted to existing engines.
McNaught patented his compound steam engine in 1845 (Patent no. 11001). He relocated to Manchester in 1849.
The Robertson Street workshop was operated by William McNaught & Son as "Makers of Steam-Engine Indicators, Steam Gauges, etc" at 12 Hampden Terrace, Glasgow, at least until 1895.
McNaught'ed beam engines
A beam engine might run at 5 psi (34 kPa), using one low-pressure cylinder steamed by an 1840 wagon boiler, but when McNaught'ed the new high-pressure cylinder could run at over 60 psi (410 kPa), which the then-new Lancashire boiler could produce. In addition the stress on the centre of the beam was substantially reduced, and stress on the crank pin slightly reduced. This was important in preventing beam failure.
Many engine makers McNaughted existing beam engines, including William McNaught of Rochdale, as the thermodynamic (and fuel efficiency) benefits of high-pressure steam were beginning to be understood.
Bolton Steam Museum displays a McNaughtt'ed beam engine. The Cellars Clough mill engine was McNaughte'd by Woodhouse and Mitchell of Brighouse in 1909.
- Hills, Richard Leslie (1993), Power from Steam: A History of the Stationary Steam Engine (paperback ed.), Cambridge University Press, p. 244, ISBN 9780521458344, retrieved January 2009 Check date values in:
- Hills, Richard L. (Sep 2004), "McNaught, William (1813–1881)", Oxford Dictionary of National Biography, Oxford University Press, retrieved 15 June 2010 (Online version requires subscription)
- Pickles, Newton; Graham, Stanley (19 June 1979), "Lancashire Textile Project", Tape 79/AG/13, Stanley Graham, Barnoldswick, retrieved 15 June 2010
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