Joy valve gear
From Wikipedia, the free encyclopedia
Joy valve gear is a type of locomotive valve gear, Patented in 1870, where the movement is derived from a vertical link connected to the connecting rod. The vertical movement is translated into the horizontal movement required by the valve spindle by a die block moving in a slide which can be varied in inclination.
Joy gear was also used by John Fowler & Co. and several other steam traction engine manufacturers.
Designed by David Joy (1825–1903) Locomotive and Marine engineer, Joy valve-gear was used extensively on L&YR and LNWR locomotives, and also by the Manning Wardle-built narrow gauge 2-6-2 locomotives of the Lynton & Barnstaple Railway.
[edit] References
[edit] See also
- Extracts from the Diaries of David Joy: [1]
- A software simulation of Joy - and other common valve gear configurations - is available for download from: [2]
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