thumb|150px|right|Harmonium Debain '''Alexandre-François Debain''' (6 July 1809 – 3 December 1877) was a French inventor who developed the harmonium. He made a new action system, in which, when depressing a note on the keyboard, a valve opened thereby emitting sound from the instrument. He patented it in Paris in 1842.<ref>{{cite web|url= http://www.harmoniumnet.nl/pumporgan.html|title= The worldly counterpart to the 'circular saw of faith'.|author= Christo Lelie|date= 18 July 2009|publisher= |accessdate= 4 June 2012|archive-url= https://web.archive.org/web/20101111233907/http://www.harmoniumnet.nl/pumporgan.html|archive-date= 11 November 2010|url-status= dead}}</ref>
== Notes == {{Reflist}}
== External links == * [http://www.fortepian.instrumenty.edu.pl/en/pianos/show/piano/126 Harmonicord by Alexandre Debain, Paris ca. 1854-55 (''The Piano in Polish Collections'')]
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{{DEFAULTSORT:Debain, Alexandre}} Category:French musical instrument makers Category:1809 births Category:1877 deaths Category:Place of birth missing Category:19th-century French artisans