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1 Caprotti, Arturo
[br]b. 22 March 1881 Cremona, Italyd. 9 February 1938 Milan, Italy[br]Italian engineer, inventor of Caprotti poppet valve gear for steam locomotives.[br]Caprotti graduated as a mechanical engineer at Turin Royal Polytechnic College and spent some years in the motor car industry. After researching the application of poppet valves to railway locomotives, he invented his rotary cam valve gear for poppet valves in 1915. Compared with usual slide and piston valves and valve gears, it offered independent timing of inlet and exhaust valves and a saving in weight. Valve gear to Caprotti's design was first fitted in 1920 to a 2−6−0 locomotive of the Italian State Railways, and was subsequently widely used there and elsewhere. Caprotti valve gear was first applied in Britain in 1926 to a Claughton class 4−6−0 of the London, Midland \& Scottish Railway, resulting in substantial fuel savings compared with a similar locomotive fitted with Walschaert's valve gear and piston valves. Others of the class were then fitted similarly. Caprotti valve gear never came into general use in Britain and its final application was in 1954 to British Railways class 8 4−6−2 no. 71000; this was intended as the prototype of a class of standard locomotives for express trains, but the class was never built, because diesel and electric locomotives took their place. Some components survived scrapping, and a reconstruction of the locomotive is in working order.[br]Further ReadingJohn Marshall, 1978, A Biographical Dictionary of Railway Engineers, Newton Abbot: David \& Charles.P.Ransome-Wallis (ed.), 1959, The Concise Encyclopaedia of World Railway Locomotives, London: Hutchinson (contains a note about Caprotti (p. 497) and a description of the valve gear (p. 301).PJGR -
2 Land transport
See also: INDEX BY SUBJECT AREA[br]Austin, HerbertHamilton, Harold LeeIssigonis, Sir Alexander Arnold ConstantineMa JunMorris, William RichardSauerbrun, Charles de -
3 Railways and locomotives
Biographical history of technology > Railways and locomotives
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4 Steam and internal combustion engines
See also: INDEX BY SUBJECT AREA[br]Giffard, Baptiste Henry JacquesHamilton, Harold LeePorta, Giovanni Battista dellaBiographical history of technology > Steam and internal combustion engines
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Arturo Caprotti — (22 March 1881 – 9 February 1938) was an Italian engineer and architect. In 1915 or 1916 he invented the Caprotti valve gear rotary cam poppet valve gear for steam engines of all kinds, but in practice it was employed almost exclusively in… … Wikipedia
Caprotti — ist der Familienname folgender Personen: Arturo Caprotti (1881–1938), italienischer Ingenieur Guido Caprotti (1887–1966), italienischer Maler Bernardo Caprotti (*1925), italienischer Unternehmer Gian Giacomo Caprotti (1480–1524), italienischer… … Deutsch Wikipedia
Arturo Caprotti — Gedenktafel an Caprottis Geburtshaus Arturo Caprotti (* 22. März 1881 in Moscazzano; † 10. Februar 1938 in Mailand) war ein italienischer Ingenieur. Inhaltsverzeichnis … Deutsch Wikipedia
Caprotti valve gear — The Caprotti valve gear is a type of steam engine valve gear invented by the Italian Arturo Caprotti. It uses camshafts and poppet valves rather than the piston valves used in other valve gear. While basing his design on automotive valves,… … Wikipedia
Steuerung (Dampfmaschine) — Triebwerk einer Atlantic Lokomotive (Pennsylvania Railroad E6s) mit Heusinger Steuerung (engl. Walschaerts gear ) Die Dampfmaschinensteuerung, auch kurz Steuerung genannt, ist der Teil einer Kolbendampfmaschine, der das Einströmen des Dampfes in… … Deutsch Wikipedia
Steam engine — A steam engine is a heat engine that performs mechanical work using steam as its working fluid. [ [http://www.britannica.com/EBchecked/topic/564472/steam engine steam engine Britannica Online Encyclopedia ] ] Steam engines have a long history,… … Wikipedia
SAR-Klasse 16E — Indienststellung 1935 Hersteller Henschel Gebaute Stückzahl 6 Nummerierung 854 859 Bauart 2 C1 h2 Länge über Kupplungen 21.850 mm Ø Treibrad … Deutsch Wikipedia
