Patent information:

Patent:Utility 912,364
Patented:February 16, 1909
Applied:July 17, 1908
Title:Insulator for Electrically Charges Wires
Description:Tube for routing wires through wood with spring clip attached to the outside of the tube to prevent the tube from slipping out.
Category:Wall Tube
Assigned to: 

Patentee Information:

CONRAD, Stonewall Jackson Cedar Rapids, IA

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:152GINSULATORS Through wall or plate Bushing type Grommets or tubes;
Class:16MISCELLANEOUS HARDWARE
Subclass:108FERRULES, RINGS, AND THIMBLES;
Class:16MISCELLANEOUS HARDWARE
Subclass:2.2BUSHING Providing a restricted or insulated environment (i.e., sealable) for internal elements;
Class:16MISCELLANEOUS HARDWARE
Subclass:381HINGE Including means to retain pintle in hinge (e.g., tamper proof, nonrising pintle, etc,) Threaded or slotted pintle or knuckle;
Class:411EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER
Subclass:508HEADED FASTENER ELEMENT Having resilient securing structure on shank;

Known specimens:

None known

Drawings:

Drawing page 1

Page 1