| | Foreign Insulators
| | | by Marilyn Albers
| | |
The New Foreign Glass Chart
Two and a half years ago, when this
column first appeared, we were just beginning to get our feet wet doing research
on foreign insulators. And now I'm so happy to be able to tell you that, as of
this writing, there is a brand new design chart available to you, complete with
... [more]
| | | Porcelain Insulator News
| | | by Jack H. Tod, NIA #13
| | |
Dear Jack:
I have a U-293, baby-blue glaze, and with an
underglaze G-P marking (cobalt blue ink). You don't show this marking in the
second edition of your Porcelain Insulators Guide Book. Any ideas an who made
this insulator?
... [more]
| | | Patents On Glass Insulators
| | | by Jack H. Tod, NIA #13
| | |
I used the book "Electrical
Porcelain" as a vehicle to publish essentially my entire patent file,
nearly 700 of the most important 1880-1962 insulator patents from the several
thousand I recorded in my patent search work in the early 1970's. The listing
includes a number of previously unknown or unpublished patents on specific glass
... [more]
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