A violet ray is an antique medical appliance used during the early 20th century to discharge in electrotherapy. Their construction usually featured a disruptive discharge coil with an interrupter to apply a high voltage, high frequency, low current to the human body for therapeutic purposes.[1]
- ^ Improvements to Violet-Ray Generator of the applicator type, designed primarily for therapeutic use 1506344, Janke, Benno, "Violet-Ray Generator", published January 30, 1923, issued August 26, 1924.