Jeffrey mine insulator and pin

[Trade Journal]

Publication: Electrical Review

New York, NY, United States
vol. 45, no. 6


Malleable Iron Pins for Mine Feeder System.

The Jeffrey Manufacturing Company, Columbus, Ohio, is marketing an insulating support for feed wires in mines. The pin is made in halves of malleable iron, threaded for a glass insulator at one end and barbed at the other, it is driven into position in the roof.

 

MALLEABLE IRON INSULATED PIN.
Malleable Iron Insulated Pin.

 

The insulator is cupped and the pin has a hollow centre, allowing for drainage and preventing the collection of moisture on the feed wire.

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Keywords:Jeffrey Manufacturing Company : Patent : CD 185
Researcher notes:The insulator in the drawing is a CD 185.
Supplemental information: Patent: 526,498
Researcher:Elton Gish
Date completed:June 17, 2005 by: Elton Gish;