Insulators were originally designed to keep the wires linking telegraphs and telephones insulated from the wooden poles that held them aloft.
Vintage ceramic telephone insulators.
Vintage large brown porcelain insulators pinco 1966 rare.
In conjunction with the expansion of rural electrification in the early 20th century there was a major boom in the manufacturing of.
They insulated and protected the wooden poles from the electricity coursing through the wires.
Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires.
Vintage joslyn antique 5 brown porcelain electric insulators with bracket.
In the mid 1960 s a few people began collecting these glass and porcelain insulators.
Vintage large 75 00.
Glass insulators were first produced in the 1850 s for use with telegraph lines.
Make offer vintage brown ceramic stoneware locke power pole insulator made in usa 17 hemingray turquoise and clear electric insulators.
As technology developed insulators were needed for telephone lines electric power lines and other applications.
Telephone insulator cd 128 clear pyrex ab tm reg.
Vintage brown ceramic telephone insulator with original wood peg 11 18 36.
Telephone wire utility power pole insulator ceramic glazed brown black white vtg.
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.
They are made from glass porcelain or composite polymer materials nonconductive materials.
Glass and ceramic insulators were originally manufactured in the 1800s to protect telegraph lines and secure them to poles and then later used for telephone and power lines.
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7 vintage brown porcelain ceramic insulators antique telephone insulators c.
Ils 38 23 6d 16h.
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.
12 large and 5 small.
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Today there are over 2000 collectors and insulator clubs national shows and good reference books are available.
Lot of 64 99.