Publication: Electrical World
New York, NY, United States
China and Glass Insulators.
The illustrations on the next page show a line of china and glass insulators and insulator pins, manufactured by Mr. Fred M. Locke, Victor, N. Y. Fig. 1 is a pin fixed to a galvanized-iron side bracket for attachment to the sides of buildings and similar places. This device is extremely substantial, and is said to be indestructible. Fig. 2 represents a No. 17 glass insulator for potentials up to 60,000 volts. Its diameter is 7 inches and it weighs 5 pounds. Mr. Locke states that there are 20,000 of these in daily use. The steel pin shown in Fig. 3 is provided with a porcelain base, and is adapted for high-voltage work. It is a very strong pin and said to be indestructible. By its use the arcing distance of the insulator is increased over 5000 volts. There are 100,000 of them in daily use. The No. 3 three-shell china insulator (Fig. 4), of which there are 75,000 in use, is designed for potentials up to 20,000 volts. The insulator is made up of three shells fused together with glaze. The diameter is 5-1/2 inches and the weight 3-1/2 pounds. Fig. 5 represents a No. 18 glass insulator for potentials of 25,000 volts and under. The distinctive features of this insulator are the eaves and the long centre petticoats. The diameter of the insulator is 5-1/2 inches and the weight 4 pounds. Another three-shell china insulator is shown in Fig. 6. It is the No. 4 style, and is recommended for potentials as high as 60,000 volts. There are said to be 20,000 of them in use. Its diameter is 7 inches, and weight 4 pounds. A two-shell china insulator is shown in Fig. 7. This insulator is designed for telephone and telegraph lines, and will safely carry pressures as high as 5000 volts. Its diameter is 3-1/2 inches and its weight 1-1/2 pounds. It is stated that 100,000 of them are now used. Fig. 8 shows a new pony china insulator for telegraph and telephone lines, made from thoroughly vitrified, high-grade brown china; and Fig. 9 illustrates a two-shell china insulator for potentials up to 5000 volts. This insulator is designed for carrying street-railway cables and other conductors of large diameter. Its diameter is 3-1/2 inches, and it weighs 1-1/2 pounds. There are 30,000 of them in use now.
Mr. Locke has recently started a new factory in Victor, and it is now running successfully, turning out 10,000 china insulators per week.
Fig 1. - Galvanized-Iron Side Bracket.
Fig 2. - No. 17, Glass Insulator.
Fig 3. - Steel Pin with Porcelain Base.
Fig 4. - No. 3 Three-Shell China Insulator.
Fig 5. - No. 18, Glass Insulator.
Fig 6. - No. 4, Three Shell China Insulator.
Fig 7. - Two-Shell China Insulator.
Fig 8. - Pony China Insulator.
Fig 9. - Two-Shell China Railway Feeder Insulator.
|Keywords:||Fred Locke : Electric Porcelain & Manufacturing Company : Brookfield : CD 286 : CD 288 : U-927 : U-939 : U-4 : U-939A|
|Researcher notes:||In the photo: top row, center, CD 286; second row: U-927A, CD 288, U-927; bottom row: U-939, U-4, U-939A. All of the porcelain insulators were made by Electric Porcelain & Mfg. Co. and will have under-glaze ink markings. The glass insulators were made by the Brookfield Glass Co.|
|Date completed:||June 5, 2005 by: Elton Gish;|