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1 Beau de Rochas, Alphonse Eugène
SUBJECT AREA: Steam and internal combustion engines[br]b. 1815 Franced. 1893 France[br]French railway engineer, patentee of a four-stroke cycle engine.[br]Renowned more for his ideas on technical matters than his practical deeds, Beau de Rochas was a prolific thinker. Within a few years he proposed a rail tunnel beneath the English Channel, a submarine telegraph, a new kind of drive for canal boats, the use of steel for high-pressure boilers and a method of improving the adhesion of locomotive wheels travelling the Alps.The most notable of Beau de Rochas's ideas occurred in 1862 when he was employed as Ingenieur Attaché to the Central de Chemins. With remarkable foresight, he expressed the theoretical considerations for the cycle of operations for the now widely used four-stroke cycle engine. A French patent of 1862 lapsed with a failure to pay the annuity and thus the proposals for a new motive power lapsed into obscurity. Resurrected some twenty years later, the Beau de Rochas tract figures prominently in patent litigation cases. In 1885, a German court upheld a submission by a German patent lawyer that Otto's four-stroke engine of 1876 infringed the Beau de Rochas patent. It remains a mystery why Beau de Rochas never emerged at any time to defend his claims. In France he is regarded as the inventor of the four-stroke cycle engine.[br]Principal Honours and DistinctionsSociété d'Encouragement pour l'Industrie Nationale, prize of 3000 francs, 1891.Bibliography1885, The Engineer 60:441 (an English translation of the Beau de Rochas tract).Further Reading1938, Bulletin de la Société d'Encouragement pour l'Industrie Nationale 137:209–39. 1962, Document pour l'histoire des techniques Cahier no. 2: pp. 3–42.B.Donkin, 1900, The Gas, Oil and Air Engine, London: p. 467.See also: Langen, EugenKABBiographical history of technology > Beau de Rochas, Alphonse Eugène
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