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- Q4345786 subject Q10831480.
- Q4345786 subject Q6262945.
- Q4345786 abstract "Joy valve gear is a type of steam locomotive valve gear, designed by David Joy (3 March 1825 – 1903), Locomotive and Marine engineer, and patented (no. 929) on 8 March 1879. The British patent has not been found but the US patent (US252224 of 10 January 1882) has. Joy's gear is similar to Hackworth valve gear but has a compensating mechanism which corrects for "the slight inequality in the motion of the valve arising from the arc of the lever".The drawing (right) shows the Joy gear as applied to a London and North Western Railway locomotive. The US patent shows several modifications of the gear. In figure 6 of the patent, one of the levers has been replaced by a slide.".
- Q4345786 thumbnail Joyvalvegear.png?width=300.
- Q4345786 wikiPageExternalLink joydiary.htm.
- Q4345786 wikiPageExternalLink US252224.pdf.
- Q4345786 wikiPageExternalLink glossaryj.php.
- Q4345786 wikiPageExternalLink software.htm.
- Q4345786 wikiPageExternalLink joy.htm.
- Q4345786 wikiPageWikiLink Q10831480.
- Q4345786 wikiPageWikiLink Q1112477.
- Q4345786 wikiPageWikiLink Q1219708.
- Q4345786 wikiPageWikiLink Q1335143.
- Q4345786 wikiPageWikiLink Q1340491.
- Q4345786 wikiPageWikiLink Q1370388.
- Q4345786 wikiPageWikiLink Q1486303.
- Q4345786 wikiPageWikiLink Q163941.
- Q4345786 wikiPageWikiLink Q1700093.
- Q4345786 wikiPageWikiLink Q17020288.
- Q4345786 wikiPageWikiLink Q171043.
- Q4345786 wikiPageWikiLink Q1779703.
- Q4345786 wikiPageWikiLink Q221539.
- Q4345786 wikiPageWikiLink Q253623.
- Q4345786 wikiPageWikiLink Q3401256.
- Q4345786 wikiPageWikiLink Q3820529.
- Q4345786 wikiPageWikiLink Q5722198.
- Q4345786 wikiPageWikiLink Q5965211.
- Q4345786 wikiPageWikiLink Q605169.
- Q4345786 wikiPageWikiLink Q6262945.
- Q4345786 wikiPageWikiLink Q6459402.
- Q4345786 wikiPageWikiLink Q743500.
- Q4345786 wikiPageWikiLink Q756263.
- Q4345786 comment "Joy valve gear is a type of steam locomotive valve gear, designed by David Joy (3 March 1825 – 1903), Locomotive and Marine engineer, and patented (no. 929) on 8 March 1879. The British patent has not been found but the US patent (US252224 of 10 January 1882) has.".
- Q4345786 label "Joy valve gear".
- Q4345786 depiction Joyvalvegear.png.