Alphonse Eugène Beau de Rochas (9 April 1815,

Digne-les-Bains Digne-les-Bains (; Occitan: ''Dinha dei Banhs''), or simply and historically Digne (''Dinha'' in the classical norm or ''Digno'' in the Mistralian norm), is the prefecture of the Alpes-de-Haute-Provence department in the Provence-Alpes-Côte ...

, Alpes-de-Haute-Provence – 27 March 1893,

Vincennes Vincennes (, ) is a commune in the Val-de-Marne department in the eastern suburbs of Paris, France. It is located from the centre of Paris. It is next to but does not include the Château de Vincennes and Bois de Vincennes, which are attache ...

) was a French engineer. He was the first to patent the

four-stroke engine A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directi ...

in 1862, but he did not build one and the idea was subsequently developed by

Nicolaus Otto Nicolaus August Otto (10 June 1832, Holzhausen an der Haide, Nassau – 26 January 1891, Cologne) was a German engineer who successfully developed the compressed charge internal combustion engine which ran on petroleum gas and led to the mo ...

and other engineers.

References

{{DEFAULTSORT:Rochas, Alphonse Beau de 1815 births 1893 deaths People from Digne-les-Bains French engineers