(under subclass 23) Subject matter of the type having means for feeding the electrodes into contact with each other and then separating the electrodes to initiate the discharge, and provided with means by which (if the electrodes are not brought into contact electrically, even though they may be in physical contact, so that the discharge cannot be initiated) the electrodes are repeatedly separated and fed towards each other until the obstruction to the flow of current between the electrodes is removed from the space between the electrodes.
(1) Note. Discharge devices wherein the electrodes are manually moved, and which may have the electrodes repeatedly contacted by operation of the manual moving means, are not
included in this subclass but are in subclasses 57 and 58 of this class.
