Abstract: A brake and wheel for in-line roller skates having multiple slip disks (30a to 30ad) which are placed on retainer ring (40). Slip disks (30a to 30ad) being made of flexible plastic material, and retainer ring (40) being made of low friction plastic material. Retainer ring (40) being snapped closed once slip disks (30a to 30ad) are in place. A right rim (20) and a left rim (50) are placed abutting each other. The rims are joined in the circular hollow of assembled retainer ring (40) and slip disks (30a to 30ad) by screws (10a to 10c).

Abstract: A video display system including an energizable video display control element, a power source for generating power and a control portion. The control portion, in turn, comprises a laddic-shaped addressing element, an input wire, and enabling wire and an input addressing wire. The laddic-shaped addressing element has a pair of sidebars and plurality of rungs including an input rung, at least one addressing rung, and an enabling rung, with the sidebars having a lower magnetic reluctance than the rungs. The input wire is magnetically coupled to the input rung for generating an input flux signal in the addressing element, with the input flux signal having a direction representative of the energization state of the video display control element.