Patent information:

Patent:Utility 1,869,397
Patented:August 2, 1932
Applied:March 16, 1929
Title:Insulator
Description:Insulator with spiral or helical grooves to all rain to wash the surface better
Category:Spiral
Assigned to: 

Patentee Information:

STROUP, Charles L. Oak Park, IL

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:174INSULATORS With conductor holding means Insulator structure;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:211INSULATORS With moisture or dirt removing or shedding;

Known specimens:

Number:U 819
Number:U 820

Drawings:

Drawing page 1

Page 1