Hemingray Glass Company

The Hemingray 42, a telegraph insulator produced by the Hemingray Glass Company, is widely found in North America

The Hemingray Glass Company was an American glass manufacturing company. The company was founded by Robert Hemingray and Ralph Gray in 1848. In its early years the company went through numerous and frequent name changes, including Gray & Hemingray; Gray, Hemingray & Bros.; Gray, Hemingray & Brother; Hemingray Bros. & Company and R. Hemingray & Company before incorporating into the Hemingray Glass Company, Inc in 1870.[1] The Hemingray company had factories in Cincinnati, Ohio and Covington, Kentucky with main production in Muncie, Indiana. Though Hemingray was best known for its telegraph insulators, the company produced many other glass items including bottles, fruit jars, pressed glass dishes, tumblers, battery jars, fishbowls, lantern globes, and oil lamps.[1] In 1933, the company was sold to the Owens-Illinois Glass Company but production remained in Muncie under the Hemingray name.

The main plant in Muncie shut down in 1966[2] and insulator production ceased. The complex is now the used by Gerdau Ameristeel, a steel production company headquartered in Brazil.


Hemingray was best known for producing telegraph insulators. To give an overview of the large variety of styles produced, the following table contains the twenty most common.[3] There are two numbers given in this table: the Consolidated Design (CD) number and the style number. The CD number is from a classification system developed by collectors that refers to the shape of the insulator and is completely independent from the Hemingray Glass Company.[4] However the style number (or name) was assigned by Hemingray to each insulator. Due to slight modifications in design over years of production single styles can span multiple CD numbers.

CD Style Introduced Discontinued Usage Nickname Photo
154 42 1921 1960s Telegraph/Telephone Metzger Special
121 16 1890s 1920s Long Distance Toll
152 40 1910 1921 Telegraph Hoopskirt
145 21 1880s 1930s Telegraph Beehive
107 9 1950s 1960s Telephone, Rural Pony
155 45 1938 1960s Telephone, Long Distance ---
106 9 1890s 1940s Telephone, Rural Pony
163 19 1940s 1960s Secondary Power Distribution ---
160 14 1880s 1956 Telephone, Rural Baby Signal
162 19 1880s 1940s Secondary Power Distribution, Telephone Signal
133 Standard 1870s 1910s Telegraph Signal
122 16 1919 1960s Telephone, Long Distance Toll
125 15 1870s 1933 Telegraph ---
147 --- 1907 1920s Transposition Spiral Groove
129 TS 1940s 1960s Transposition ---
113 12 1890s 1940s Telephone Double Groove Pony
128 CSA 1930s 1950s Telephone, Long Distance ---
134 18 1880s 1930s Telegraph, Secondary Power Distribution ---
164 20 1880s 1940 Secondary Power Distribution ---
124 4 1880s 1910s Telegraph ---

See also

Brookfield Glass Company

Insulator (electrical)


  1. 1 2 Whitten, David (2015). "Hemingray Glass Company". glassbottlemarks.com. Retrieved May 25, 2015.
  2. Meier, Bill (2011). "Hemingray Glass Insulators - 100 Years Of History". insulators.info. Retrieved May 25, 2015.
  3. Willis, Christian (2015). "Hemingray.info - The Hemingray Database: Top 20 Identified Insulators". hemingray.info. Retrieved May 25, 2015.
  4. Meier, Bill (2010). "CD Numbers Explained". insulators.info. Retrieved May 25, 2015.

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