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 893,285 on July 14, 1908
By Edward M. Tompkins
Insulator: Terminal insulator providing a tight seal between conductor running down through the center of the insulator

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Tuesday, July 14, 2026
Special Events
Upcoming Insulator & Bottle Shows Shows
Insulator Show The third annual Wabash Valley Insulator Show
  Shelburn, IN Sat, August 1 almost 3 weeks
Insulator Show Chesapeake Bay Insulator Club 25th Annual "Summer" Insulator Show and Sale
  York, PA Sat, August 8 almost 4 weeks
Insulator Show Jefferson State Insulator Club's Annual Tailgater
  Bend, OR Fri, August 14 (2 day show) just over 4 weeks
Insulator Show Dixie Jewels Summer Swap Meet
  Toccoa, GA Sat, August 15 almost 5 weeks
Insulator Show 8th Annual Michigan Insulator Show
  Berkley, MI Sat, August 22 almost 6 weeks
Insulator Show Mineral Point Insulator Show 2026
  Mineral Point, WI Sat, August 29 just over 1 month
Insulator Show WRIC 16th Annual Oktoberfest Insulator Show
  Richfield, OH Sat, September 12 2 months
Insulator Show Windy Knoll Farm Insulator and Bottle Show
  Bloomingburg, NY Sat, September 19 just over 2 months
More shows
Insulator show listings courtesy National Insulator Assocation
Happy Anniversary!
42 years Today!! Tue, July 14
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48 years Tomorrow! Wed, July 15
59 years Tomorrow! Wed, July 15
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