(under the class definition) Subject matter including structure which is spaced from and positioned with respect to the resistance element to redirect any heat impinging on the structure from an external source onto the resistance element, or to redirect any heat produced by the resistance element and impinging on the structure back on the resistance element.
(1) Note. The heat reflectors in this subclass are restricted to directing heat toward the resistance element or to redirecting the heat produced by the element back to the element. Where the heat produced by the element is directed by reflectors for heating some object other than the element itself classification is in the electric heating class (see the search note below)
SEE OR SEARCH THIS CLASS, SUBCLASS:
226+, for a resistor with a heat insulating housing, which may even protect the resistor from external heat by reflection, i.e., prevent the external heat going to the resistance element; and especially subclasses 234+ for a resistor with a gaseous or vacuum layer between the element and the casing or housing.
334, for a resistor with a heat protecting shield other than a casing, and not classified elsewhere.
SEE OR SEARCH CLASS
219, Electric Heating, especially 34, for where the heat produced by the element is directed by reflectors for heating some object other than the element itself; subclass 540 for electric heating radiators. See also (1) Note above.
432, Heating,
50, for shielding devices in connection with heating furnaces or other hot objects acting as a screen or baffle to heat.
