Alexandre-François Debain (6 July 1809 – 3 December 1877) was a French inventor who developed the

harmonium The pump organ is a type of free-reed organ that generates sound as air flows past a vibrating piece of thin metal in a frame. The piece of metal is called a reed. Specific types of pump organ include the reed organ, harmonium, and melodeon. T ...

. 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.

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Harmonicord by Alexandre Debain, Paris ca. 1854-55 (''The Piano in Polish Collections'')
{{DEFAULTSORT:Debain, Alexandre French musical instrument makers 1809 births 1877 deaths Place of birth missing