US PATENT SUBCLASS 338 / 51
WITH HEAT DISSIPATING PROJECTIONS (E.G., VANES)

Current as of: June, 1999
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338 /   HD   ELECTRICAL RESISTORS

51WITH HEAT DISSIPATING PROJECTIONS (E.G., VANES) {1}
52  DF  .~> Granular, powdered, or transversely stacked resistance element

DEFINITION

Classification: 338/51

(under the class definition) Subject matter wherein a surface of the resistance element, casing, terminal, or other resistance structure is enlarged or increased in area over what is otherwise necessary by a projecting portion integral therewith or attached thereto, such as vanes, fins, or corrugations, to increase the heat radiated, dissipated, or otherwise transferred from the surface structure of the resistor to the surrounding or adjacent medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

49, for shunt type resistors.

53+, for resistors with cooling gas or liquid circulation.

159, for a mechanically adjustable or variable resistor with a heat conducting or distributing path.

226+, for resistors generally with heat conducting casings or housings.

SEE OR SEARCH CLASS

165, Heat Exchange,

185, for a fin or heat transmitter, per se.

219, Electric Heating,

34, for heating radiators.