Patent information:

Patent:Utility 1,158,105
Patented:October 26, 1915
Applied:February 9, 1914
Title:Insulating Tube
Description:Wall tube with wedge projections (made by Illinois Electric Porcelain Co.)
Category:Wall Tube
Assigned to:1/2 to Belle Callender

Patentee Information:

CALLENDER, Edwin F. Galesburg, IL

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:152GINSULATORS Through wall or plate Bushing type Grommets or tubes;
Class:125STONE WORKING
Subclass:11.06 

Known specimens:

None known

Drawings:

Drawing page 1

Page 1