2011年12月7日星期三

Insulators – attractive protectors of unintended current flow

The story of electrical insulators is a long and colourful one. It involves the usefulness for which Replacement landscape oil paintings and bulbs for Canada and Worldwide.they were designed, the material used and the diverse colours in which they emerged.which applies to the first offshore merchant account only,

Thanks to the electricity involved in the telegraph and telephone, the world also knows insulators. This writer, in researching the telephone and telegraph for previous Ponderings was reminded that the Peace River Museum, Archives and Mackenzie Centre has, in its Diane Gayton Collections Room, a hockey-sock full – a lot of insulators – in diverse shapes, sizes, materials and colours. The attraction, for this scribe, is the shape and colour.

It would appear, on researching these items, that others are attracted by the same visual elements. The number of collectors in North America, alone, is astounding. Though, had it not been for the technological advances of the mid-1800s and the telegraph, insulator enthusiasts might have had to direct their hobby time to something else.

"The very earliest insulators were lightning rod insulators. One of the interesting things about insulators is that they parallel the development of electricity. Before people were making electricity, insulators were being used to support grounding rods, just channeling electricity to ground, protecting houses. Later on when the telegraph was invented, suddenly there was a need to run wires on poles for many miles and to develop insulators. They started out small because there was typically only one telegraph line on a pole", says antique glass insulator collector Ian Macky in a Collectors Weekly interview. That changed to accommodate several on one pole.

According to the Insulators Glass and Porcelain Web site, glass insulators were first produced in the 1850s for the use of telegraph lines, later used for telephone and electrical power lines, as well as other applications. It was in the 1960s that a few people began collecting them – many from along railway lines. That number has burgeoned into thousands of avid collectors.The additions focus on key tag and Injection mold combinations, There were, however, some target shooters, who used the devices for their destructive practice,This will leave your shoulders free to rotate in their Floor tiles . minimizing the number of intact collectibles.

But, getting back to the intention of insulators, regardless of the material – glass, porcelain, or rubber – electrical circuits control the flow of current to perform a useful function. The usefulness is compromised when the current travels to an unwanted destination. Thus, the insulator.

Since the insulator's inception, various entrepreneurs have seen the worth in manufacturing the product, many such as Hemingray, a product about which we will learn later, putting its stamp on it. One can only imagine, in North America alone, the number of insulators used for telegraph and telephone lines. Macky suggests manufacturers were producing them in the millions with the peak being in the 1920s to 1940s. He also suggests there were designs that made no practical sense at all, but had good esthetic value.

Among the manufacturers of note were: Hemingray – "Among the biggest and best," says Macky. "They made colour insulators on purpose. They were also the makers of the Hemingray 42, the bestselling insulator of all time, produced in the millions. You don't see a lot of insulators in the air anymore,Your source for re-usable Plastic moulds of strong latex rubber. except at railroads, and they mostly are Hemingray 42."

Not all insulator manufacturers were in the United States. Canada was a producer, too. Sometime prior to 1857, three Foster Brothers – George Henry and Charles had blown glass, including insulators, in Canada and the United States. Their company in Canada changed names several times eventually to become the Dominion Glass Company in 1913 with factories in Quebec and Ontario.

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