Telephone Ceramic Insulators

Lot of 4 hemmingray no.

Telephone ceramic insulators.

Make offer vintage brown ceramic railroad telephone insulators lot of 2. Insulators were originally designed to keep the wires linking telegraphs and telephones insulated from the wooden poles that held them aloft. Insulators were first developed in the mid 1800s to be used on telegraph and telephone lines to contain the electrical current and prevent the current from entering the ground below. In the mid 1960 s a few people began collecting these glass and porcelain insulators.

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. Vintage brown ceramic railroad telephone insulators lot of 2. Telephone wire utility power pole insulator ceramic glazed brown black white vtg. Telephone insulator cd 128 clear pyrex ab tm reg.

Off back csa ma. See more ideas about glass insulators insulation antique glass. 5 00 6d 19h 14 90 shipping. The fundamental materials used are a mixture of feldspar 35 china clay 28 flint 25 ball clay 10 and talc 2.

Porcelain is the most frequently used material for insulators insulators are made of wet processed porcelain. 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. Vintage insulators are most commonly made out of porcelain or glass materials and they come in a wide variety of colors and shapes making each item a unique. Vintage joslyn 103 spool insulators ceramic porcelain 3 telephone pole power.

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. Rare vintage large ceramic high voltage power line insulator. Glass insulators were first produced in the 1850 s for use with telegraph lines. Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires.

Vintage brown ceramic telephone insulator with original wood peg 11 18 36. As technology developed insulators were needed for telephone lines electric power lines and other applications. Kf ceramic power line insulator 7 tier mushroom style 7 5 12lbs.