One of the problems facing a harmonica player in the days before affordable electronic amplification was making themselves heard in an ensemble with other instruments. Various harmonicas were designed that attempted make the instrument louder or more piercing, but in 1934 Leigh A. Elkington of New York was granted a patent for a simple megaphone that could be clipped onto any standard harmonica:
For some time, this device was marketed under the name Elton Harmonicaphone. Here is an ad from a 1937 catalog:
Elkington also designed and marketed the very successful Elton Harmonica Holder, for which he was awarded US Patent 1734799 in 1929.
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