Dry process mine insulators with this marking u 98 were possibly made by american porcelain co.
Ceramic insulator identification.
Link to other types of insulators.
Today there are over 2000 collectors and insulator clubs national shows and good reference books are available.
Glass insulators were first produced in the 1850 s for use with telegraph lines.
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 piece that can make a great addition to a collection.
Make offer 2 vintage brown ceramic porcelain insulators locke thomas thomas insulator saddle back ceramic vintage 5 22 00 8 20 shipping.
There are a large variety of insulators in existence.
Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires.
The u chart was developed by jack tod and published in 1971 porcelain insulators guide book for collectors his 3rd edition book was published in 1988.
Click on an insulator above for more information.
The 55 4 is the ansi style.
Different fonts and sizes of letters and numbers were used.
For 50 years crown jewels of the wire has been the leading publication for glass and porcelain insulator hobby news history articles with columns devoted to worldwide insulators show reports in depth research articles meeting announcements photos and other insulator information.
Found on porcelain insulators.
Tod died in 1989 and in 1991 his wife granted permission to elton gish to assign new u numbers as new styles were reported.
Paul greaves spent countless hours verifying the many different fred locke markings on porcelain insulators.
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Return to the national insulator association page.
Cook porcelain insulator corp.
As technology developed insulators were needed for telephone lines electric power lines and other applications.
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.
Cooper power systems the 99335 may be a catalog number.
Evidently the 1 to 4 line marking stamp did not securely hold the individual letters and numbers and sometimes a few letters shifted.
In the mid 1960 s a few people began collecting these glass and porcelain insulators.
2 vintage brown ceramic porcelain insulators locke thomas.
Collecting insulators is a fun and unique hobby that will allow you to learn much about the history and make of these unique objects.
