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The Hearing Aid Museum |
Hearing Aids of all types—Ear
Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids,
Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing
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Great London No. 5 Carbon Hearing Aid Battery
The Great London No. 5 carbon hearing aid battery was manufactured for
The Great London Hearing Aid Company of Toronto, Ontario for their
hearing aids made during the 1930s.
This 4½-volt battery was comprised of
three large carbon-zinc dry cells in a black paper wrapping.
It
measured 3½” high by 3⅛” wide by 1” thick and weighed 10¾ oz.
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Click picture for larger view |
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Top view of the Great London No. 5 carbon hearing aid battery. There are
no manufacturer's markings on this battery apart from the "05" on the
bottom (see next picture), but as it came with a Great London carbon
hearing aid, it was likely made for them. The pin spacing is ¾". Note that the
pins were set to the back of the battery, not in the center like many
similar batteries were. This is because this battery was used with a
"fat" microphone and setting the pins back helped counterbalance the
battery so it didn't fall over when the microphone was directly attached
to the battery. |
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Click picture for larger view |
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Bottom view of the Great London No. 5 carbon hearing aid battery
showing the plain black paper that covered the battery and the "05" on
the bottom.
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Click picture for larger view |
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