ERA “Reflexophone” rheostat
A 2 dial rheostat found in a 1920’s chiropractor’s office in upper Michigan. One dial reads 0-10, the other 0-100. The seven output terminals are connected to a common metal strip. The wood box with phenolic top, on 6 x 9 1/2” base has no markings. This is likely a 1920’s knock-off of the Abrams reflexophone.
The magic under the lid Coiled wire resistance and a common output to 6 terminals.
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