Maico Model 41 Vacuum Tube Hearing Aid
The Maico model 41, also known as the Maicophone,
was produced by Maico Electronics, Inc. of Minneapolis, MN from 1940 to
1942. The name "Maico" was derived from the initials of the Medical
Acoustic Instrument Company.
This hearing aid was a two-piece body worn aid
using a Brush Development Co. crystal type receiver that was commonly
used on many of the hearing aids of the early 1940s rather than the more
usual dynamic receiver used later on. |
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The picture at the right shows in inside view of the Maicophone. It used three vacuum tubes and had a
single volume control. It had a crystal microphone also manufactured by
Brush Development Company.
The hearing aid measures 4˝" by 2˝" and was worn in
a man's shirt pocket or carried in a purse by a lady.
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A close-up of the rear (interior) view of the microphone showing
various patent numbers for the US, Great Britain and Canada, 1931-1941. |
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