.~.~.~ Skin effect heater type (e.g., S.E.C.T., etc.)
DEFINITION
Classification: 392/469
Skin-effect heater type (e.g., S.E.C.T., etc.):
(under subclass 468) Subject matter wherein the resistance heating element of the pipeline length is accomplished by the flow of alternating current through the walls of a ferromagnetic pipe, and the current flow is confined to the interior of the ferromagnetic pipe.
SEE OR SEARCH THIS CLASS, SUBCLASS:
478, for fluid conveying tube or pipe comprising resistive heating element.
480+, for pipe or tube forms flow path.
SEE OR SEARCH CLASS
138, Pipes and Tubular Conduits,
33, for electric thawing and freezing protection. 174, Electricity: Conductors and Insulators, appropriate subclasses for electrical conductors or conduits.