(under subclass 296) Subject matter wherein the resistance element is wound or coiled on a cylindrical or prismatic core, the surface of the core engaging the helix over substantially the entire periphery of the core and over the entire axial length of the helix or winding as, for example, to reinforce or shape the helix over its length.
(1) Note. For classification in this subclass, the winding must be in contact with the cylindrical or prismatic core over substantially the entire length of the winding as opposed to mere engagement at points or elements of the core, in which latter case classification is in subclasses 304+ below.
(2) Note. The manner of assembly of the element on the core is immaterial for classification in this subclass. The element may be preformed as a coil, and applied to the core.
SEE OR SEARCH THIS CLASS, SUBCLASS:
214, for a cable type resistor whose element may be helical.
218, for a tapered resistor as where the element is wound on a tapered core.
261, 264+ and 270, for incased, embedded, or housed resistance elements coiled on a core. 298, for a resistor whose element is wound on a core, the element being formed as a compound helix.
299, for resistors whose elements are formed as a plurality of distinct helices or windings on a core.
300, for a resistor whose element is formed as a coated helix on a core.
301, for a resistor where the core is formed as a flat base
or ribbon.
304+, for a resistor whose element is wound or otherwise disposed on a frame or support, there being only an engagement between the element and the frame or support over a portion of the length of the element. See also (1) Note above.
SEE OR SEARCH CLASS
219, Electric Heating, particularly
543, and 546+ for electrical heaters, wherein the heating element is wound on a core.
242, Winding, Tensioning, or Guiding,
430+, for a process or apparatus for forming an article (e.g., a resistor) by winding material onto a core.
336, Inductor Devices, especially 130+, 172, 196+, and 221, for inductor devices involving a coil wound on a core.
