Editing Montgolfier brothers (section)

==Other Montgolfier inventions==

Both brothers invented a process to manufacture [[Onionskin|transparent paper]] similar to [[vellum]], imitating the technique of the English, followed by the papermakers Johannot and [[Réveillon]].<ref>[http://en.canson.com/our-history/1777 Our History 1777] Canson, n.d., 2 July 2017</ref> In 1796, Joseph Michel Montgolfier invented the first self-acting [[hydraulic ram]], a water pump to raise water for his paper mill at [[Voiron]].<ref>{{cite web|last=de Montgolfier|first=J.M.|title=Note sur le bélier hydraulique, et sur la manière d'en calculer les effets|trans-title=Note on the hydraulic ram, and on the method of calculating its effects|  pages=42–51| url=http://annales.ensmp.fr/articles/1802-1803-1/32-38.pdf|work=Journal des Mines, 13 (73)| language=fr| year=1803}}</ref> In 1772, the British clockmaker [[John Whitehurst]] had invented its precursor, the "pulsation engine". In 1797, Montgolfier's friend [[Matthew Boulton]] took out a British patent on his behalf.

In 1816, Joseph Michel's sons obtained a British patent for an improved version of the pump.<ref>See, for example: [https://books.google.com/books?id=dGQ7AQAAIAAJ&pg=PA405 "New Patents: Pierre François Montgolfier"] ''The Annals of Philosophy'', '''7''' (41) : 405 (May 1816).</ref>