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 174,773 on March 14, 1876
By Aries P. Brooke
Fruit Jar: Improved seal on fruit jar

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Saturday, March 14, 2026
Special Events

Upcoming Insulator & Bottle Shows Shows
Insulator Show 58th Annual Bottles, Jars, Insulators, Glassware, Signs, Gold and Silver Show & Sale.
  Oroville, CA Today! Fri, March 13 (2 day show)  
Insulator Show The Northwest Missouri Insulator & Bottle Show
  Platte City, MO Today! Sat, March 14  
Insulator Show WRIC 27th Annual Swap Meet and Club Meeting
  Strongsville, OH Today! Sat, March 14  
Insulator Show Kansas Territory Bottle, Insulator & Postcard Show
  Hutchinson, KS Sun, March 29 in 15 days
Insulator Show 58th Annual Golden Gate Historical Bottle Society Bottles, Insulators, Antiques & Collectibles Show & Sale
  Antioch, CA Fri, April 10 (2 day show) in 27 days
Insulator Show The Deland Antique Bottle Show at Turkey Creek
  Reddick, FL Fri, April 10 (2 day show) in 27 days
Insulator Show Dupage Collectors Expo
  Wheaton, IL Sat, April 11 in 28 days
Insulator Show Yankee Pole Cat Insulator Club Spring Insulator & Collectibles Show
  Enfield, CT Sun, April 12 in 29 days
NIA show The 57th NIA National Show & Convention
  Helena, MT Fri, July 10 (3 day show) in 118 days
NIA show The 58th NIA National Show, Sale & Convention
  Lee'S Summit, MO Fri, July 9 in 482 days
More shows
Insulator show listings courtesy National Insulator Assocation
Happy Birthday!
age 77 Today!! Sat, March 14
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  Today!! Sat, March 14
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11 years Today!! Sat, March 14
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