Large Cataphoric Glass Electrode — Historic Form

A closer look.

An uncommon shape worth recognising

This larger form has a sculptural quality of its own. The broad recessed head turns away from the stem, giving it a silhouette that is easy to overlook until you have seen the catalogue drawing. After that, it is unforgettable. I like these unusual pieces because they open another drawer in the history of the apparatus, showing how extensive and imaginative the old accessory ranges could be.

Its place in the old catalogue

The larger head belonged to the same historical medicament-pad category as the small cataphoric 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

Compare the head outline and recess rather than relying on size words alone. Large and small are period catalogue distinctions, not measurements for a supplied example.

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Historical reference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. 9. The Master Violet Ray catalogue · Renulife Electric Company, 1919 manual