(under subclass 247) Subject matter wherein the metallic sheath is formed as two substantially flat sheets secured together with the resistance element and insulation disposed between the sheets.
(1) Note. Usually in this subclass the insulation is also composed of flat sheets with a flattened resistance element disposed between the sheets. A slight bending of the sheets to close the spaces adjacent the edges of the sheets is still considered substantially flat for classification in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
212, for flexible or folding resistors of the sheet type.
251, for resistors whose element is in insulation with an outer metallic sheath, the metallic sheath being in one piece and bent or folded over the insulation to form a flat surface on each side of the insulation.
254+, for a flattened resistor whose element is disposed between flat layers.
