Abstract: An ozone generator for a hot tub, the ozone generator comprising an elongate body comprising an inlet and an outlet to define a flow path therealong and first and second electrodes spaced apart to define a gap therebetween, said gap being provided along the flow path. The ozone generator is configured to apply an electrical charge to the first and second electrodes, in use, to generate an electric arc discharge across the gap. The ozone generator further comprises a shielding arrangement configured to isolate the first and second electrodes from the electric arc discharge generated during use. By isolating the electrodes from the electric arc discharge, they are shielded from surface oxidation and subsequent corrosion caused by the electric arc discharge, thereby improving service life.

Abstract: This patent application describes a novel delivery system utilizing multiple natural therapeutic modalities featuring low-level laser light, clean enriched air with aromatic healing fragrances, and anti-inflammatory natural grounding currents from the surface of the earth, placed in omnipresent consumer devices, which conveniently bring these therapeutic modalities into close, frequent, and effective proximity to the consumer on a practical, economic, and safe platform that is independent of a doctor's office. This delivery system virtually brings nature at its therapeutic best into the comfort and convenience of the home and office where modern man virtually spends most of his existence.

Abstract: Process controllers, methods, and systems provide for frequency control to account for the effects of periodic disturbances in the feedback signal of closed loop control systems. The frequency components of the feedback signal are determined, including the magnitude and phase of each. Waveforms for each frequency component are generated with substantially the same magnitude and substantially the opposite phase of each frequency component. The waveforms are then summed to produce a compensating waveform that is summed within the output of the control system so that the effects of the periodic disturbances are cancelled from the control system output being provided to the system under control.