Patent information:

Patent:Utility 215,516
Patented:May 20, 1879
Applied:April 21, 1879
Title:Improvement in Devices for Attaching Plungers to Glass Presses
Description:Means of attaching a plunger to a glass press using a chuck. (This is known as the ""Gill Chuck"" and may have been used in insulator production, it is not known if Gill was employed by Hemingray at the time of this patent.)
Category:Plunger
Assigned to: 

Patentee Information:

GILL, James G. Pittsburg, PA

Class and subclass information:

Class:65GLASS MANUFACTURING
Subclass:305PRESS MOLDING MACHINE;
Class:403JOINTS AND CONNECTIONS
Subclass:230ROD END TO TRANSVERSE SIDE OF MEMBER;

Known specimens:

None known

Drawings:

Drawing page 1

Page 1