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7500 VOLTS what is it? | Insulators90 of 112 |  |  |
Posted 3 years ago
flashlarue
(22 items)
This "insulator' is about 4 inches tall and is threaded on the outside. It is embossed;
7500 VOLTS
PYREX
T.M.REG.
MADE IN U.S.A.
A
It also has an oblong opening in the bottom.
What is it and what was it used for?
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InsulatorsInsulators were originally designed to keep the wires linking telegraphs an…
Color: Clear
Embossing: (Front) PYREX / T.M. REG. / U.S. PAT. OFF. / MADE IN U.S.A. (Back) {letters} / PAT NO. / 2046960 / 7500 VOLTS
An unusual insulator, used for isolating the high voltage electrodes. This one is made by the venerable American manufacturer Pyrex. Embossing is always a plus, since there is often none on these more unusual early industrial pieces, and the Pyrex name certainly adds appeal.
It's a neon sign insulator. You can see it in my Pyrex neon sign catalog here: <http://glassian.org/Pyrex/Neon/fcover.html>