CD 144, PATENT - OTHER, Light Green
A style of insulator produced mainly for telegraph service and nickname the "Foree Bain" insulator. The December 23, 1890 patent was issued to Foree Bain for his patent for grooves inside and outside the insulator surface for the dual purpose of increasing leakage distance, or to break the water film.
This insulator with the patent date embossed around the dome was most likely produced in the 1890's by an unknown glass company or manufacturer. Then on February 28, 1901 the patent was sold to the Hemingray Glass Company. It is believed that the No Embossing versions were produced by Hemingray.
The vast majority of the particular CD 144 (Foree Bain) insulators with both the patent date, and the No Embossing versions were found still on the poles during the last three decades along a railroad that ran between Denver to Littleton to Castle Rock, Colorado.
Embossing (Dome) (Circle) PATENT. DEC. 23 1890.
Index # 010