The 3M Corporation of Minnesota, for some strange reason, made this little thermoelectric generator in the early 1960s. This was during the height of the cold war and was intended to power your transistor radio in your fallout shelter in the event of nuclear war. Apparently they were not a great success and only less than a handful survive. The heating of two dissimilar metallic alloys--in this case possibly lead-tellurium alloys--generated a small electric current. The process was patented in the mid-1950s at a time when the USSR was using similar lamp generators to power radios in rural areas. The 3/8 volts or so generated by the heated thermocouples was stepped up to 3-6V by simple electronics in the lamp base that included a germanium transistor, capacitors, and a coil.
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Alternative Energy--Power from a Kerosene Lamp!
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