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...
Historically, glass insulators like Hemingray42 were used on the power lines and telegraph lines to prevent wires from getting in contact with wet poles. They were also employed to build the...
Toughened Glass Insulators MacLean Power Systems line of toughened glass insulators covers insulator needs across all system voltages. This allows our customers to utilize less SKU’s and still have...
Glass Insulators Collector SpecialTee Co. Antique Telegraph Vintage Glass Insulators Collector Throw Pillow, 18x18, Multicolor. 5.0 out of 5 stars 1. $25.99 $ 25. 99. Get it as soon as Mon, Sep 26....
Vintage Glass insulators were first produced in the 1850s for telegraph lines, then for telephone and power transmission lines. They insulated and protected the wooden poles from the electricity...
Hemingray is the best known and was the most prolific glass insulator manufacturer in the world. Markings used by Hemingray include “HEMINGRAY”, “H.G.CO.”, “PATENT MAY 2 1893”, “PATENT DEC 19 1871”,...












