(under subclass 137) Insulators having a structure specially designed to disperse or to facilitate shedding or disposal of rain, atmospheric moisture or other foreign matter. The means for accomplishing this may consist, for example, of petticoats, skirts, flanges, ribs, etc., modified for this purpose, or drainage openings, grooves, channels, etc.
(1) Note. For insulators having means for handling or dealing with fluids other than rain or atmospheric moisture, see this class, subclasses 30 and 31.
(2) Note. See this class, subclass 139 and indented subclasses, for insulators combined with heating means to dry or prevent moisture from condensing.
