External Throat / Neck Glass Electrode

A closer look.

The crescent in the case

This is the kind of electrode that gives a vintage set its theatre. A straight stem opens into a shallow crescent, an elegant change of direction that looks beautifully deliberate. Laid against dark lining, it reads almost like a drawn symbol. Look closer and the interest is in the joins and curves: a practical historical idea expressed through a surprisingly graceful object.

Its place in the old catalogue

The crescent was catalogued as an external neck or throat form.

A small piece of a bigger machine

The glass belongs to a larger arrangement of generator, resonator and handpiece. The head gives each form its distinctive working geometry: a broad face, a small cup, a row of fingers or a carefully curved stem. For a collector, those differences are part of the engineering story as much as the glowing glass itself.

Finding the right example

Match the width and curve of the yoke as well as the stem connection. External throat forms should not be confused with the much slimmer internal forms in period catalogues.

Enquire about this form

Tell us the maker and model, add a photograph of your handpiece and the attachment you are trying to replace, and we can discuss identification, sourcing and availability. The exact example and connection details are agreed individually.

About the illustration

Generated illustration of this historical electrode form, created for Forgotten Frequencies; not an actual stock photograph. The violet glow is artistic. The supplied example, gas fill, dimensions, connector and availability are confirmed by enquiry.

Historical reference

Master No. 4; Renulife No. 4. The Master Violet Ray catalogue · Renulife Electric Company, 1919 manual