E.F. Johnson Company Antenna Insulator, 1936-1950
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Artifact Overview
Insulators--made of poor electrical conductors such as glass, ceramic, plastic, or composite materials--help make electric power and communication transmission lines safe. They isolate wires from utility poles, transmission towers, and buildings--structures that are made of conductive materials that could cause signal degradation, power loss, fire, or pose a shock hazard if the lines touched them.
Artifact Details
Artifact
Insulator
Date Made
1936-1950
Creators
Place of Creation
Location
Not on exhibit to the public.
Object ID
56.74.40
Credit
From the Collections of The Henry Ford. Gift of Michigan State University.
Material
Porcelain (Material)
Glaze
Color
White (Color)
Dimensions
Length: 12 in
Diameter: 1 in
Inscriptions
stamped on side, under glaze:
JOHNSON
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