1982 >> February >> Foreign Insulators  

Foreign Insulators
by Marilyn Albers

Reprinted from "INSULATORS - Crown Jewels of the Wire", February 1982, page 7

More About British Porcelain Insulators

Last month, if you will recall, we talked at length about AI (Allied Insulators) Industrial Products Inc., located in Great Britain. This large diversified company produces porcelain insulators of many types, and other electrical equipment used the world over. Just as a review, let me point out again that the formation of the present day company took place in 1959 with the amalgamation of two existing companies -- Bullers Ltd. (dating back to 1840) and Taylor Tunnicliff & Company Ltd. (founded in 1867).

Mr. N. R. Woodward (Houston, Texas) returned home from a trip to England recently and brought back such a wealth of information concerning these two companies, including their catalogues, that I would like to share some of it with you in greater detail. For now, I will zero in on Bullers Ltd., and save Taylor Tunnicliff Ltd. for a later date.

Again, in review, you remember that the story of Bullers began in 1840 with the foundation of a small family pottery business by Mr. John Buller in the village of Bovey Tracy in Devon, England. Though the firm produced only kiln "furniture" in the beginning, with the coming of the electrical age the company moved to the center of the pottery industry, Hanley in Stoke-on-Trent, and began producing electrical insulators. By the year 1868 it was an established supplier of insulators, complete with iron work. In 1885 the metal foundry of Jobson Brothers at Tipton in Staffordshire was purchased, and the new company, Buller, Jobson & Company Ltd., was formed.

In 1890 the firm became a public company, and the name was changed to Bullers, Ltd., and this company, along with Taylor Tunnicliff & Company Ltd., merged to form AI Industrial Products Inc. Now we have come full circle! 

The drawings of the porcelain insulators that follow are from a Bullers catalogue put out by their London office at the time the company was still called Buller, Jobson & Company, which means the date was somewhere between 1885 and 1890. All of these insulators were available upon order by the customer. Though I did not include them, the catalogue also showed drawings of shackles, terminal insulators, bobbins, "leading in" insulators, battery stands and telephone fittings. You will notice the drawings are shown without threads, even though all were threaded, with the exception of 467 (underarm insulator) and 581 (knob insulator). At least I am assuming this to be true, since too many threaded specimens have been found to deny that fact. Also note the ones that were, or could be made, in two pieces if desired 430, 470, 476 and 521. It is interesting, too, to see that they used the word "shed" where we would say skirt or petticoat. 


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One thing that really intrigued me was seeing that 499, 500 and 537 were porcelain inserts made for use with an outer iron hood! The November 1980 issue of Crown Jewels (page 8) carried a picture of some very old telegraph insulators used on the Overland Telegraph Line (1872) between Adelaide and Darwin in Australia. These insulators had outer iron hoods or shells with inner skirts of porcelain! They were referred to as the armoured type. In the one that I have the porcelain part is nearly all broken away, so that I cannot tell you whether or not it was marked in any way. This is an extremely heavy old insulator, still on the original metal pin, and I would not part with it for anything! However, it is entirely possible that Bullers supplied the porcelain inserts for these. Why not? Australia was part of the Commonwealth, and certainly many styles of British insulators have been found there. 

Also notice 374. Looks familiar, doesn't it? You and I have been thinking all along that this old telegraph insulator was made in Australia because it is so commonly found there, and is certainly different in shape from most insulators we think of as appearing English. But here it is in Bullers catalogue! I wonder why none of these were marked.

Now take a look at 545. This is listed in the catalogue as Gisborne's Canadian. I have one just like it with the incuse marking BULLERS LTD, LONDON. It has taken on new dignity since all this information has come to light! 

To find British made insulators in Canada and Australia should not surprise us, because they were part of the Commonwealth, but it is a bit of a revelation to see that way back in 1895 Bullers was supplying insulators to South America, India, Spain, Norway, Sweden and Italy! Check your foreign porcelains against these drawings. Maybe some of your Italians, Indians and Swedes have English blood! 

Mr. Woodward has in his possession an old advertisement for railway insulators manufactured by Bullers Ltc., which states that the company supplied insulators and fittings for conductor rail and overhead systems in Argentina, Brazil, Bolivia, Chile, India, Poland and South Africa. Since Bullers made insulators for railway electrification, and so does one of the divisions of AI Industrial Products Ltd. today, this would be a good time to show you a chart that Mr. Woodward put together for us on British Railways. Beside being a topnotch authority on insulators, he is also quite a Railroad Buff! He and his British friend, David Benny, followed many miles of track, and combed railroad yards to get pictures and gather information, and generally had a "jolly good time"! His explanation follows the chart. 

If you have seen porcelain insulators from England, you have probably seen some of them marked GPO. That's General Post Office; those are telephone insulators. However, in many cases, insulators made for the railways also had the users' initials placed on them. With the aid of the accompanying chart*, we will explain a little about British Railways and the earlier companies that made up the present nationalized system.


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At the outset, railways were privately constructed and operated: and there were many of them. In 1923, following World War I. most of the railways operating throughout England, Scotland and Wales were grouped into four separate regional companies. This grouping was ordered by parliament to stabilize the impossibly fragmented industry. 

At the present time, most of the insulators we have seen are marked with initials matching the companies formed in 1923. We have also a sample marked BR(W), which would be a later one made after 1948. 

On the chart, we have listed some of the earlier companies, including the larger ones. As time passes, it is entirely possible that insulators will be found corresponding to some of these. Note that the Great Western Railway existed long before the 1923 grouping. It is, therefore, possible that GWR insulators could pre-date 1923! The letter W following the name indicates that line operated in Wales: S indicates Scotland. 

When the railways were nationalized by act of parliament in 1948, six operating regions were designated, as shown. There have been some changes as regards individual rail routes: but basically that's the picture today. Unfortunately, there is very little open wire in service now. communication and signal circuits are carried in heavily insulated cables laid in covered concrete troughs at trackside! 

*Condensed from information courtesy of David Benny, railway historian living at Derby, England.


At left is a picture of two "for real" red porcelain insulators used with power supply wires on British railroad signal circuits. The two differ slightly, but are both considered to be Bullers #1 style, and bear the incuse Bullers trademark on the crown tops. The insulator shown at the left is quite a bright red, has a slightly recessed inner skirt, and was manufactured in 1969. This, being ten years after the merger of Bullers and Taylor Tunnicliff, would indicate that the new company, AI Industrial Products Inc., continued to use the Bullers trademark. The insulator on the right is a darker red, has a slightly extended inner skirt, dates from 1939, and in addition to the Bullers trademark, the incuse letters LMS for London Midland & Scottish Railway (See chart). 

These insulators were brought back from England by Mr. Woodward and are considered quite rare. They will be on display at the National Show in Cedar Rapids, Iowa, in July. A little bird told me he may have one or two extras if you are swift! Many thanks to Mr. Woodward for all this good information.



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