Patent information:

Patent:Utility 2,142,422
Patented:January 3, 1939
Applied:November 10, 1936
Title:Insulator and Method of Manufacturing the Same
Description:Method of making station post insulators with hollow cavity and filling cavity with dry gas
Category:Insulator
Assigned to:The Ohio Brass Co.

Patentee Information:

TAYLOR, John J. Wadsworth, OH

Class and subclass information:

Class:264PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES
Subclass:632OUTSIDE OF MOLD SINTERING OR VITRIFYING OF SHAPED INORGANIC ARTICLE OR PREFORM Producing hollow article (e.g., tube, etc.);
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:30WITH FLUIDS OR VACUUM Insulators;
Class:264PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES
Subclass:267MECHANICAL SHAPING OR MOLDING TO FORM OR REFORM SHAPED ARTICLE To produce composite, plural part or multilayered article Shaping material and uniting to a preform Against inner surface of hollow preform;
Class:264PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES
Subclass:85UTILIZING SPECIAL INERT GASEOUS ATMOSPHERE OR FLUSHING MOLD WITH INERT LIQUID;

Known specimens:

None known

Drawings:

Drawing page 1

Page 1