National Carbon Co. (N. C. Co.) No. 430-E Hearing Aid "B" Battery
The N. C. Co. No 430-E hearing aid "B" battery was made by
the National Carbon Co., Inc. (abbreviated on this battery to N. C. Co.
Inc.) of New York. It was used in some vacuum
tube hearing aids manufactured during the Second World War (1939-1945).
This 30 volt "B" battery weighed 2.9 oz and measured 2¾" high by 1
15/16"
wide by 15/16" thick.
The inscription on the front reads, "Manufactured in accordance with
War Production Board orders and designed for use with any make of
hearing aid device which requires a battery of this voltage and capacity
and which is equipped with suitable connectors."
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Rear view of the N. C. Co. No 430-E hearing aid "B" battery showing the
positive (+) terminal at the top and the negative (-) terminal at the
bottom.
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Side view of the N. C. Co. No 430-E hearing aid "B" battery. The date
stamped on this battery is October, 1945. Another battery is date
stamped Jan, 1946 so they were still available after the war stopped for
a few months.
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Side view of the N. C. Co. No 430-E hearing aid "B" battery showing its
US patent numbers (1,797,161 & 2,272,969). The latter patent was filed
in 1939 and the patent was issued in February 10, 1942
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Top view of the N. C. Co. No 430-E hearing aid "B" battery. The top and
bottom terminals were identical so it was easy to put this battery in
backwards with the polarity reversed if you didn't pay attention to the
+ and - signs. To make sure you didn't miss them, the + and - were on
all four sides near the top and bottom respectively. |
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Bottom view of the N. C. Co. No 430-E hearing aid "B" battery.
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