Hemingray-45 Clear Vintage Glass Insulator
Like its popular predecessor Hemingray 42, the Hemingray 45 was produced in mass quantities, well into the millions. Most are extremely common. Intended as a long-distance telephone insulator, it has a thick lower wire ridge to help withstand heavier line loads.
or my low voltage landscape light base.
Insulator diameter: 3.5 inches
Glass insulators were first produced in the 1850's for use with telegraph lines. As technology developed insulators were needed for telephone lines, electric power lines, and other applications. In the mid 1960's a few people began collecting these antique glass insulators. Today there are over 3,000 insulator collectors.
All glass pintype insulators are classified in what is called the “CD Numbering” system of identification. This system was created and used by N.R. “Woody” Woodward, an early pioneer, researcher and author in the field of collecting glass insulators. The CD (Consolidated Design) numbers basically identify insulators by their shape and profile, regardless of exact embossed markings, glass color, or base type.