petticoat insulator

noun

, Electricity.

1. a bell-shaped insulator used for high-voltage insulation.

Example Sentences

One, in which paraffin appears as a cement, is an insulating stand made out of a bit of glass or ebonite tube cemented into an Erlenmeyer flask, having its neck protected from dust when out of use by a rubber washer, the other a "petticoat" insulator made by cementing a flint glass bottle into a glass dish with paraffin.

From Project Gutenberg