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Hemingray 42
In 1921, the “Hemingray-42″ style insulator was introduced which was an update/replacement for the Hemingray NO. 40 insulator. (The No. 40 had been in heavy production since 1911, for telegraph lines). The “new and improved” #42 model very rapidly gained in popularity for standard open-wire communication lines, and was soon the most popular and common insulator made for both telegraph and telephone lines. Many railroad lines used them for their telegraph communications, and the style became the standard for A T & T long distance “toll” lines. The 42 is classed as a “CD 154″, in the “consolidated design” cataloguing/identification system used by insulator collectors. Each CD number is assigned to a basic shape (profile/size), irrespective of exact embossed lettering, glass color or base type.
Hemingray 42
In 1921, the “Hemingray-42″ style insulator was introduced which was an update/replacement for the Hemingray NO. 40 insulator. (The No. 40 had been in heavy production since 1911, for telegraph lines). The “new and improved” #42 model very rapidly gained in popularity for standard open-wire communication lines, and was soon the most popular and common insulator made for both telegraph and telephone lines. Many railroad lines used them for their telegraph communications, and the style became the standard for A T & T long distance “toll” lines. The 42 is classed as a “CD 154″, in the “consolidated design” cataloguing/identification system used by insulator collectors. Each CD number is assigned to a basic shape (profile/size), irrespective of exact embossed lettering, glass color or base type.