(under subclass 581) Subject matter wherein two of the electrodes are the main discharge electrodes and there is at least another electrode in between wherein all electrodes are in series with each other so that, when an ionized discharge takes place between successive electrodes, the voltage drop between two successive electrodes is proportional to the distance between the two electrodes with respect to the overall distance between the main discharge electrodes.
(1) Note. The tubes here can be voltage regulators, voltage dividers or overvoltage protection devices for a circuit or for the tube itself.
