BACTERICIDAL APPARATUS Russian patent published in 1998 - IPC

FIELD: sterilization of air and aqueous media by action of ultraviolet radiation. SUBSTANCE: apparatus has low-pressure germicidal lamp with standard power supply circuit and three spiral electrodes put on envelope of lamp. Two extreme electrodes are located near lamp electrodes and central electrode is positioned in central part of lamp. Extreme spiral electrodes are moved away from lamp electrodes by length of cathode space and are electrically interconnected. High- voltage pulses of alternating polarity are fed to spiral electrodes from additional high- voltage source synchronized with network feeding lamp. EFFECT: improved functional efficiency and reliability of apparatus. 2 cl, 2 dwg