Abstract: An apparatus consisting of two stationary plates, at least two idle rolls with their shafts mounted to stationary plates, two separate servo drives, and a plurality of weft sensors comprising a bow roll having its shaft made of two pieces spliced rotatably in the middle of the bow roll, so the ends of the bow roll shaft can be rotated independently about the splicing spot.

Abstract: An aquatic toy constructed of a flexible, watertight body, shaped and decorated to resemble an aquatic animal, having a head, a carcass, and a tail. The toy has a first motor constructed and arranged for driving the tail in an oscillating manner to propel the toy while in water, a second motor constructed and arranged for swinging the tail off the center line of the toy to steer the toy, and a control system constructed and arranged for switching on/off the first and second motors under certain conditions. The toy further has an air ballast container constructed and arranged for maintaining the toy almost but not completely submerged when the toy is placed in water.