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 702,660 on June 17, 1902 By Fred M. Locke Glazeweld: Glazewelding (Boch variation) with extra glaze to leave air space, biscuit fired, then glaze

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