Talk:Joy valve gear

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BetacommandBot (talk) 06:58, 1 January 2008 (UTC)

Joy's patents
I have searched for Joy's patents and found US59524 and US80550  but not one for his valve gear. Was it patented under somebody else's name? Biscuittin (talk) 11:00, 10 February 2015 (UTC)


 * On Espacenet I have found 8 patents for David Joy but, again, none of them is for the radial valve gear. Biscuittin (talk) 11:10, 10 February 2015 (UTC)
 * I rather think that as a British engineer, resident and working in the UK, he would have filed his patents with the UK patent office, not those of the USA or Europe. If he was employed by an engineering firm at the time, it's possible that the patents were filed in the name of that firm. -- Red rose64 (talk) 14:10, 10 February 2015 (UTC)
 * More at which uses the words "specification No. 929". In David Joy's Diaries, we find the entry "1878-9 Winter All winter evenings working at a big model of the new radial gear, which resulted in the Patent No. 929, March 8th, 1879." -- Red rose64 (talk) 14:44, 10 February 2015 (UTC)
 * The U.S. patent is 252,224 which says (after allowing for OCR typos) "dated January 10, 1882. Application filed June 10, 1880. Patented in England March 8, 1879." -- Red rose64 (talk) 15:02, 10 February 2015 (UTC)
 * Thanks for your help but I still can't find it on Espacenet. I think the patent documents must have been lost. Biscuittin (talk) 19:34, 10 February 2015 (UTC)
 * The U.S. patent doc is at http://patentimages.storage.googleapis.com/pdfs/US252224.pdf - there are four pages of diagrams, then three pages of text. -- Red rose64 (talk) 20:06, 10 February 2015 (UTC)

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