View source for Jean-Jacques Meyer

{{more citations needed|date=June 2014}}
'''Jean-Jacques Meyer''' (1805–1877) was a French [[engineer]], noted for his work with [[steam engine]]s and [[steam locomotive]]s.

==Innovations==

===Background===

He was trained at the engineering school [[Arts et Métiers ParisTech]].

===Expansion valve===
His first major invention was the [[Meyer expansion valve]], used to improve efficiency in [[stationary steam engine]]s. The first locomotives to use this invention were a pair of [[2-2-2]] locomotives Mayer built for the {{Interlanguage link multi|Chemin de fer de Strasbourg à Bâle|fr|3=Compagnie du chemin de fer de Strasbourg à Bâle}} in 1842. Named ''L'Espérance'' (Hope) and ''Le Succès'' (Success), they continued in service for S-B's successor, the [[Chemins de fer de l'Est]] until 1859.{{sfn|Davies|2001|p=2}}

===Articulated locomotive===
He was the originator of the [[articulated locomotive]]s which bear his name. Meyer registered his first [[patent]] describing the system in 1861. The [[Meyer locomotive]] comprised: 
* a rigid single frame supporting cabin, and boiler;
* two revolving units like bogies made up each one of a steam engine involving a group of driving wheels and possibly comprising carrying wheels.

The first engine of this type built by the {{Interlanguage link multi|Société J. F. Cail & Cie.|fr|3=Société J.F Cail & Cie}} in 1868 was a 0-4-0+0-4-0 named ''L'Avenir'' (Future).{{citation needed|date=June 2014}} The design was developed by [[Gaston du Bousquet]], who designed a class of 0-6-2+2-6-0 tank locomotives for hauling heavy goods trains on the [[Chemins de fer du Nord]] and the [[Chemins de fer de Ceinture de Paris]].{{sfn|Davies|1997|pp=33, 155, 159–160}}

==Sources==
''The above information is taken from the [[:fr:Jean-Jacques Meyer|French Wikipedia]] article on the subject.''

==References==
{{reflist}}

==Bibliography==
*{{Davies-NordLocoList}}
*{{Davies-EstLocoList3}}


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{{DEFAULTSORT:Meyer, Jean Jacques}}
[[Category:Locomotive builders and designers]]
[[Category:French engineers]]
[[Category:1805 births]]
[[Category:1877 deaths]]
[[Category:Arts et Métiers ParisTech alumni]]



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