US PATENT SUBCLASS 174 / 144
.~.~.~ Arcing or grading devices

Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

137 R  DF  INSULATORS {17}
139  DF  .~ Combined {2}
140 R  DF  .~.~ With conductive arcing or stress distributing means {7}
144.~.~.~ Arcing or grading devices

DEFINITION

Classification: 174/144

Arcing or grading rings or devices, per se, specially designed for use with insulators.

(1) Note. See note (2) to the definition of subclass 140 of this class.

(2) Note. For arcing rings or devices, per se, see the reference to Class 313, Electric Lamp and Discharge Devices, under "SEARCH CLASS" in (2) Note to the definition of subclass 140 of Class 174.