VARLEY VALVE GEAR
Posted: 23 Apr 2012, 07:44
Stanley,
This governor gear was introduced by W. & J. Yates around 1880 as a retrofit for beam engines. Within a couple of years they were advertising it for fitting to horizontal engines and fitted it to their own in conjunction with their cross cut-off valve gear. By 1885 the same advertisements also promoted Corliss valve gear which rapidly overtook their slide valve gear. Somewhere, and its nagging me cos I don't remember where, there is a description of the Varley gear which may have been called Varley-McNaught gear at one time. In any event the gear was short lived. See pic.
Geoff
25 February 2008
This governor gear was introduced by W. & J. Yates around 1880 as a retrofit for beam engines. Within a couple of years they were advertising it for fitting to horizontal engines and fitted it to their own in conjunction with their cross cut-off valve gear. By 1885 the same advertisements also promoted Corliss valve gear which rapidly overtook their slide valve gear. Somewhere, and its nagging me cos I don't remember where, there is a description of the Varley gear which may have been called Varley-McNaught gear at one time. In any event the gear was short lived. See pic.
Geoff
25 February 2008