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porcelain telegraph insulator

porcelain telegraph insulator

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Currently not on view
Object Name
Physical Description
porcelain (part: material)
metal (part: material)
overall: 8 1/2 in x 4 in; 21.59 cm x 10.16 cm
ID Number
catalog number
accession number
Credit Line
from Western Union Corporation
See more items in
Work and Industry: Electricity
Data Source
National Museum of American History
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I believe this is a “ Buss Bar Insulator “. Any connection to telegraph might have come from it’s use in a “ Central Station “ location on a Direct Current Battery Bank for use as a power supply to telegraph operations. I have seen these in use many time in Power Plants and Industrial Sub Stations on AC Current. The 1/2 clamp on the bottom is missing the other 1/2 of the clamp used for support on 1 1/2 “or 2” Steel pipe support structures. At least these in my experience have been used that way. Vintage early 1900’s thru the 30’s.

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