Publication: The Electrical Engineer
New York, NY, United States
THE IMPERIAL PORCELAIN WORKS, Trenton, N. J., are making an excellent line of porcelain double petticoat line insulators, and are now introducing them vigorously, believing that they meet a decided want. The threads are absolutely regular and will fit standard pins. They are recommended for alternate current work. The works are also prepared to make switch bases with porcelain screw thread covers. The Duggan cleat already illustrated in these columns is enjoying popular approval everywhere.
|Keywords:||Imperial Porcelain Works : U-940 : U-146 : U-146A : Pass & Seymour|
|Researcher notes:||This is the first mention of Imperial making pintype insulators. They could have been one in the U-940 series, but those are very small and hardly considered suitable for even 10,000 volts. While Pass & Seymour made the first wet process threaded pintype insulator, U-146 and U-146A, Imperial made the first triple petticoat wet process porcelain pin-type.|
|Date completed:||December 21, 2004 by: Elton Gish;|