Patent information:

Patent:Utility 321,646
Patented:July 7, 1885
Applied:December 11, 1884
Title:Electric Wire Insulator
Description:Pin with spars to fit in threaded pin hole
Category:Pin
Assigned to:1/2 to John E. Smith

Patentee Information:

SCHOONMAKER, Edward T. New York, NY

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:202INSULATORS With terminal elements Pin type Screw or bayonet type;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:206INSULATORS With terminal elements Pin type Screw or bayonet type Sockets;
Class:411EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER
Subclass:417EXTERNALLY THREADED FASTENER ELEMENT, E.G., BOLT, SCREW, ETC. Thread or shank structure Circumferentially interrupted thread;

Known specimens:

None known

Drawings:

Drawing page 1

Page 1