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Electric Heater for Metal Workers.
Patent for a electric heater for heating metal in preparation for welding. Consists of a bath of sal ammonia and water with a layer of graphite on top that the metal is placed into and then electric current is turned on which heats the metal to a weldable temperature.
Date:
May 7, 1907
Creator:
Luthy, Joseph Otto
System:
The Portal to Texas History