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. Insulator clubs, local and national shows, and good reference books are available.

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Patent of the Day Utility Patent 2,972,211 on February 21, 1961 By John E. Wilcock Glass: Method of tempering glass insulators where the head is toughened more than the rest of the insulator

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