(under subclass 226) Subject matter wherein the casing or housing is formed as a plurality of layers, each layer in itself substantially completely surrounding the resistance element.
(1) Note. The inner layer adjacent the resistance element may extend within the resistance element, as when the inner layer is molded to a helical resistance element whose coils are spaced, and yet be classified in this subclass. It is only necessary that two covering layers be provided, and that the layers be positioned between the exterior of the resistance element and the exterior surface of the resistor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
231, for resistors incased, embedded or housed in plural layer casings or housing where one of the layers is a liquid.
234+, for resistors incased, embedded, or housed in plural layer casings or housing where one of the layers is a gaseous or vacuum space.
238+, for resistors embedded or enclosed in powdered material with a metallic sheath. 243+, for resistors embedded or enclosed in solid material with a metallic sheath.
