Dating Ceramic Power Pole Insulators

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Dating ceramic power pole insulators. Return to the national insulator association page. Fil lot number year. December 5th 2017 at 12 54 pm ian macky says. 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.

Glass insulators were first produced in the 1850 s for use with telegraph lines. 1917 1927 findlay electrical porcelain co. Vintage blue ceramic insulator marked b. Perhaps this introduction might help.

Of course the power line won t even work in that case. I have a brown ceramic insulator with no markings. As technology developed insulators were needed for telephone lines electric power lines and other applications. Hence overhead power lines are always supported on insulators mounted on their support poles towers.

January 14th 2018 at 3 53 pm nancy says. Circa early 1920 s to circa 1929 fred locke. Today there are over 2000 collectors and insulator clubs national shows and good reference books are available. An insulating material used in bulk to wrap electrical cables or other equipment is called insulation.

Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires. Insulators are used in electrical equipment to support and separate electrical conductors without allowing current through themselves. 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. Insulators were originally designed to keep the wires linking telegraphs and telephones insulated from the wooden poles that held them aloft.

Overhead line insulators it is obvious that if overhead power lines are not properly insulated from their support poles towers the current will flow towards the ground through the poles towers which also become hazardous. In the mid 1960 s a few people began collecting these glass and porcelain insulators. Make offer vintage large ceramic insulator brown power pole telphone. Porcelain insulator markings.

It is threaded and has the notch on the top. Sorry paula i don t know anything about porcelain mud insulators. He began buying porcelain insulators in 1894 from thomas in 1896 from imperial and in 1897 from e. Livorno factory insulators manufacture embossings.

Make offer vintage blue ceramic insulator marked b. 1911 1927 franklin porcelain co. The term insulator is also used more specifically to refer to insulating supports used to attach electric power distribution or transmission.