Patent information:

Patent:Utility 316,812
Patented:April 28, 1885
Applied:December 18, 1884
Title:Telegraph Insulator
Description:CD 119, self-tying via projections (347,635 more appropriate)
Category:Insulator
Assigned to:William Brookfield

Patentee Information:

O'BRIEN, John New York, NY

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:175INSULATORS With conductor holding means Insulator structure Self-retaining;
Class:248SUPPORTS
Subclass:49PIPE OR CABLE;
Class:248SUPPORTS
Subclass:69PIPE OR CABLE Brackets Plural pipe or cable With bridle ring;

Known specimens:

Number:CD 119

Drawings:

Drawing page 1

Page 1