A New Carbon Resistor Furnace

Abstract
An improved resistor furnace is reported on, which operates more satisfactorily for certain purposes than an induction furnace. The new furnace employs a slotted tube so that the current must go up one half and down the other. Both electric connections are at the bottom of the slotted tube. The electric resistance is almost four times that of a similar unslotted tube with top and bottom clamps. The new furnace operates at an estimated 38% efficiency.

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