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.
Patent of the Day
Utility Patent 2,194,189 on March 19, 1940
By William Thordarson
Insulator: CD 142, CD 142.4 - tin & iron for iridized coating to reduce water adherence

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Tuesday, March 19, 2024
Special Events

Insulator & Bottle Shows in the next 60 days
Insulator Show Announcing The First Ever! ROOTS 66 Rendezvous & Extravaganza
  Moriarty, NM Sat, March 30 in 11 days
Insulator Show Deland Antique Bottle & Insulator Show
  Reddick, FL Fri, April 5 (2 day show) in 17 days
Insulator Show The Dupage Collectors Expo
  Wheaton, IL Sat, April 6 in 18 days
Insulator Show Yankee Pole Cat Insulator Club Annual Spring Insulator, Bottle & Collectibles Show
  Enfield, CT Sun, April 14 in 26 days
Insulator Show 56th Annual Golden Gate Historical Bottle Society Antiques, Collectibles, Bottles and Insulators Show
  Antioch, CA Fri, April 19 (2 day show) in 31 days
Insulator Show Ottawa Valley Insulator Club show
  Perth, ON Sat, April 20 in 32 days
Insulator Show 28th Annual Rohde Ranch Barbeque & Tailgater
  Fresno, CA Fri, April 26 (2 day show) in 38 days
Insulator Show Lone Star Insulator Club spring tailgater
  New Braunfels, TX Sat, April 27 in 39 days
Insulator Show 2024 Columbia City Indiana Collectibles Show
  Columbia City, IN Fri, May 3 (2 day show) in 45 days
NIA show 55th NIA National Show & Convention
  Elkhart, IN Fri, June 28 (3 day show) in 101 days
NIA show The National Insulator Association 56th Annual Convention, Show & Sale
  Marlborough, MA Fri, June 27 (3 day show) in 465 days
More shows
Insulator show listings courtesy All Insulators - Crown Jewels Of The Wire
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