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7500 VOLTS what is it?

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Posted 7 years ago


(23 items)

This "insulator' is about 4 inches tall and is threaded on the outside. It is embossed;
7500 VOLTS
It also has an oblong opening in the bottom.
What is it and what was it used for?

Unsolved Mystery

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  1. imagine imagine, 7 years ago

    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.
  2. Ian Macky, 6 years ago
    It's a neon sign insulator. You can see it in my Pyrex neon sign catalog here: <>

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