Patent information:

Patent:Utility 8,438
Patented:October 14, 1851
Applied:
Title:Improvement in Insulators for Telegraphs
Description:CD 1012 & CD 1014, slotted glass tube mounted in a wooden bracket
Category:Insulator
Assigned to: 

Patentee Information:

YANDELL, John St. Louis, MO

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:45ROVERHEAD Towers, poles or posts;
Class:144WOODWORKING
Subclass:250.1FEEDER OR PRESSER Sectional roll;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:154INSULATORS Insulator and conductor embracing holder;

Known specimens:

Number:CD 1012
Number:CD 1014

Drawings:

Drawing page 1

Page 1