(under subclass 137) Insulating devices combined with things other than the insulating body, its supporting or attaching means, terminal elements, and conductor holding means, except those combinations provided for above in this class. This includes, for example, guards and other protective devices for preventing mechanical injury to the insulating body,
connectors for connecting two or more conductors supported by the insulator, heating devices for preventing condensation of moisture and other devices for improving the electrical efficiency of the insulator.
(1) Note. For multi-part or composite insulators, or insulators having coatings of other insulating material, or having metallic or nonmetallic reinforcing elements embedded therein, see this class, subclasses 178 and indented subclasses, 181, 195, 209, and 210.
(2) Note. For insulators having terminal means providing for ventilation thereof, see this class, subclass 187.
(3) Note. For trolley guards, see Class 191, Electricity: Transmission to Vehicles, subclass 35.
