Hugh Hetherington Hearing Aid Museum
Hugh Hetherington Hearing Aid Museum

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 Aids and much more!

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Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.

 

Hearing Aid Batteries

Burgess No. T3R Hearing Aid Battery

The Burgess No. T3R  was a 4½ volt  battery used in some carbon hearing aids from 1936 through the mid 1940s.

It weighed 10 oz., and measured 3¼" by 1⅛" by 4⅛" high.

The patent for this particular design was filed on February 4, 1936, but wasn't given approval until December 17, 1940.

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Top view of the Burgess No. T3R battery showing the plug arrangement.

The pins in the lower left and right were used with carbon hearing aids.

 

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Front view of the Burgess T3R hearing aid battery.


 

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Close up of the back side of the Burgess T3R battery.

This battery was supposed to be used by Aug. 1942.

The patent number was 2,225,460. Click on the patent number to see the paperwork submitted for this patent. This patent was for a soft rubber plug arrangement so the pins didn't have to be precisely aligned, or of precise size.


 

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