Object Record

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Object Name Insulator
Catalog Number 2002.51.17
Description Aqua glass Brookfield CD 151 insulator. The insulator has an embossed "0" on the top of the dome. The groove is positioned between two ridges; the top ridge is slightly wider than the bottom ridge. The double petticoat with a smooth base. The embossed lettering on the front of the petticoat reads: "W. Brookfield" and "New York" on the reverse.
Material glass
Dimensions H-4.125 Dia-3.5 inches
Subjects Insulators
Glass industry
Telegraph lines
Classification Glass
Business & Commerce
Communications & Public Utilities
Imagefile 104\20025117.JPG
Year Range from 1890.0
Year Range to 1897.0
Notes In the 1870s and 1880s, the need for insulators increased as more telegraph lines were put into use. During the 1870s, Brookfield began producing large amounts of insulators at their Brooklyn plant, and the quantity of insulators produced was second only to the Hemingray Glass Company. It is estimated that over 100 types of insulators were produced by Brookfield. In 1902, a second plant was opened in Old Bridge, New Jersey. The Brooklyn plant was closed shortly after, in 1912. By the early 1920s, production had stopped at the Old Bridge plant and the company dissolved

From about 1890 to 1897, one half-mold was marked "W. Brookfield" with "New York" on the opposite half-mold. After the company was incorporated in 1898, the "W" was dropped when new molds were made to either replace those too worn to be used or new styles.

CD 151 insulators were used on telegraph lines.
Made Brookfield Glass Company