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Vintage insulators telephone pole hemingray brown ceramic. As technology developed insulators were needed for telephone lines electric power lines and other applications. Insulators were originally designed to keep the wires linking telegraphs and telephones insulated from the wooden poles that held them aloft. Glass insulators were first produced in the 1850 s for use with telegraph lines. Vintage glass insulators were first produced in the 1850s for telegraph lines then for telephone and power transmission lines.
Vintage electric ceramic glaze telephone telegraph pole insulator cap brown 19 49 1900 s hemingray 42 usa 24 48 telephone insulator 4 x 3 5 glass bead bottom. Aqua ice blue am tel tel co glass telephone toll insulator. Top rated seller top rated seller. Vintage small clear glass hemingray telephone pole insulator 12 usa 22 41.
Shop for and learn about vintage glass insulators. An electrical insulator is a material. 9 50 2d 9h. In conjunction with the expansion of rural electrification in the early 20th century there was a major boom in the manufacturing of insulators with production peaking from the 1920s through the 1940s when millions of hemingray dominion and.
Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires. In the mid 1960 s a few people began collecting these glass and porcelain insulators. Their sole purpose was to insulate the wire from the wood reason for which materials such as glass porcelain or composite polymer materials had been chosen. In north america glass was always the predominate material for communications insulators but porcelain has become the standard for power distribution due to its greater strength and surface resistance.
Today there are over 2000 collectors and insulator clubs national shows and good reference books are available. Vintage hemingray antique telephone glass insulator no 40. Insulators were originally designed to keep the wires linking telegraphs and telephones insulated from. In 1850 companies such as hemingray bookfield and whitall tatum started producing glass insulators for telegraph lines telephone and power transmission lines later on.
They are made from glass porcelain or composite polymer materials nonconductive materials. See more ideas about glass insulators insulation antique glass. They insulated and protected the wooden poles from the electricity coursing through the wires.
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