Ceramic Insulator Identification

Link to other types of insulators.

Ceramic insulator identification.

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. Return to the national insulator association page. The 55 4 is the ansi style. Collectors interest has been focused on some specific areas and style numbers have been created to assist in identification and cataloging styles.

Glass insulators were first produced in the 1850 s for use with telegraph lines. Found on porcelain insulators. Paul greaves spent countless hours verifying the many different fred locke markings on porcelain insulators. 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.

Jobber of electrical supplies. Make offer 2 vintage brown ceramic porcelain insulators locke thomas thomas insulator saddle back ceramic vintage 5 22 00 8 20 shipping. Go back to main page. 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.

Cooper power systems the 99335 may be a catalog number. Tod died in 1989 and in 1991 his wife granted permission to elton gish to assign new u numbers as new styles were reported. Click on an insulator above for more information. In the mid 1960 s a few people began collecting these glass and porcelain insulators.

Circa early 1920 s to circa 1930 cooke wilson e. Evidently the 1 to 4 line marking stamp did not securely hold the individual letters and numbers and sometimes a few letters shifted. 2 vintage brown ceramic porcelain insulators locke thomas. As technology developed insulators were needed for telephone lines electric power lines and other applications.

Today there are over 2000 collectors and insulator clubs national shows and good reference books are available. Different fonts and sizes of letters and numbers were used. Dry process mine insulators with this marking u 98 were possibly made by american porcelain co. Cook porcelain insulator corp.

There are a large variety of insulators in existence.