Abstract: An EEG electrode system for establishing positive electrical contact with the scalp, uses absorptive electrode wrap material in contact with metallic electrodes, with saturated electrode wrap material placed in contact with the scalp. Saturation of the electrode warp material with a conductive solution such as saline provides mechanically and electrically stable contact at multiple scalp electrode sites. An electrode wrap holder assembly holds the electrode wrap and an exposed portion of the electrode wrap in contact with the scalp, while providing access to the electrode wrap for re-wetting with the conductive solution if required. The electrode wrap holders are mounted in straps, hard caps or other headgear. Adjustment of the electrode wrap holders within the mounts further compresses the flexible, absorptive electrode wrap, causing flow of the conductive solution therein and enhancement of the electrical contact.

Abstract: The invention relates to a motor vehicle wheel capable of improved dynamic self-balancing against imbalancing forces in the X, Y and Z planes. The wheel comprises a hub portion and an annular rim portion integral with the hub and extending circumferentially around the hub portion. The rim has inner and outer flanges adapted for securing a tire to the wheel. The rim portion is provided with a circumferential integral annular channel containing a quantity of balancing fluid having a relatively high boiling point and a relative low freezing point and whose remaining physical properties are not negatively affected by adverse environmental conditions. As the wheel rotates, the fluid spinning within the channel will substantially instantaneously counteract imbalances within the wheel and tire combination caused by irregularities due to, e.g., valve stems, dents and attached road debris by migrating to a location within the channel directly opposite the imbalancing force.