1986 >> June  

Message to readers about contents for this month....



Bell Laboratories Record - March 1930 Vol.8 No.7

   by Ludwell Sibley - Flemington, New Jersey


In the days when a couple of million miles of telephone and telegraph circuits were carried on open-wire lines in the U.S., the Bell companies had a strong interest in improved designs for insulators. For example, a telephone call from New York to San Francisco in 1920 went through wires supported on, at ...                    [more]


From the Land "Down Under" - Australian Insulators



Glass insulators were first manufactured in Australia in c. 1926 by Australian Glass Manufacturers. Their factory was, and still is, located on South Dowling Road in Sydney. Australian Glass Manufacturers (A.G.M.) had developed a toughened type of glass very similar to Pyrex glass. Since the Pyrex ...                    [more]


Letters to the Editor



Dear Carol,

It was interesting to see the pictures of the threadless porcelain insulator in the January, 1986 issue of "Crown Jewels" (page 31) which belonged to Larrin Wanechek of Cle Elum, Washington.

I have been in touch with Larrin because I have two insulators similar in ...                    [more]


"After Hours" Glass - Whitall Tatum Company



In 1922, the prestigious glass company, Whitall Tatum, of Millville, N.J., began to manufacture glass insulators. The insulator plant, subsequently owned by the Armstrong Cork Co., and later, by the Kerr Glass Manufacturing Co., became one of the world's most prolific producers of insulators. It is estimated ...                    [more]


Cleaning Your Insulators

   by Charlie Allmon


Slightly over four years ago, this magazine published a letter from a collector wanting information on cleaning insulators. Mr. Letcher, are you still an active collector? I hope so, because this article is a response to your inquiry. I hope it will also be of interest to others.

...                    [more]


The Porcelain Corner

   by Elton Gish, NIA #41


Dear Elton,

I have a sim U-632 with the following blue underglaze ink marking. What do all the numbers represent?

223  R

I also have a U-660 and another style with the following blue underglaze ink markings:

...                    [more]

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