Stackpole Carbon Company

Virgil P Quirk

A hair setting roller includes a dielectric cylinder encircled by an electrical resistance magnetic heating element secured to it and adapted to be attracted by a permanent magnet mounted in apparatus having a pair of laterally spaced electric supply contacts. Electrically connected to the opposite ends of the heating element are electric contacts for engaging the supply contacts while the magnet overcomes a force tending to separate the roller and magnet, whereby to heat the heating element electrically. The heating element has a magnetic permeability that decreases as its temperature increases until the attraction of the magnet for the device becomes weaker than the separating force acting on the roller.

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St. Marys, PA, United States of America

Virgil P Quirk