Circa early 1920 s to circa 1930 cooke wilson e.
Ceramic insulator identification.
Jobber of electrical supplies.
Link to other types of insulators.
Today there are over 2000 collectors and insulator clubs national shows and good reference books are available.
Cook porcelain insulator corp.
Collectors interest has been focused on some specific areas and style numbers have been created to assist in identification and cataloging styles.
Make offer 2 vintage brown ceramic porcelain insulators locke thomas thomas insulator saddle back ceramic vintage 5 22 00 8 20 shipping.
Found on porcelain insulators.
The 55 4 is the ansi style.
Return to the national insulator association page.
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.
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Different fonts and sizes of letters and numbers were used.
There are a large variety of insulators in existence.
As technology developed insulators were needed for telephone lines electric power lines and other applications.
2 vintage brown ceramic porcelain insulators locke thomas.
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.
Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires.
Glass insulators were first produced in the 1850 s for use with telegraph lines.
Evidently the 1 to 4 line marking stamp did not securely hold the individual letters and numbers and sometimes a few letters shifted.
Paul greaves spent countless hours verifying the many different fred locke markings on porcelain insulators.
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.
Tod died in 1989 and in 1991 his wife granted permission to elton gish to assign new u numbers as new styles were reported.
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.
Collecting insulators is a fun and unique hobby that will allow you to learn much about the history and make of these unique objects.
Cooper power systems the 99335 may be a catalog number.
