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. Auctions of Vintage Insulators are available too.
Patent of the Day
Utility Patent 588,318 on August 17, 1897
By Homer Brooke
Manufacturer: Method of keeping glass molten and delivering it to the press

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Monday, August 17, 2026
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Upcoming Insulator & Bottle Shows Shows
Insulator Show 8th Annual Michigan Insulator Show
  Berkley, MI Sat, August 22 5 days
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