Abstract: Analog control of a plurality of light sources, such as light-emitting diodes (LEDs), to generate multiple colors of light. An electronic circuit controls three or more analog outputs in response to a single analog input, each of the analog outputs controlling a different one of the light sources.

Abstract: A sled includes a hull having walls defining an inboard hole. A lip extending outward from the hall forms an outboard hole opposed to the inboard hold. A support member extends through the inboard hold and the outboard hole, as well as through the hole of a strap, thereby securing the strap to the hull.

Abstract: A sled includes a hull having walls defining an inboard hole. A lip extending outward from the hall forms an outboard hole opposed to the inboard hold. A support member extends through the inboard hold and the outboard hole, as well as through the hole of a strap, thereby securing the strap to the hull.

Abstract: A sled for sliding on a sliding surface includes a hull having a bow end and a stern end defining a longitudinal axis therebetween, a bottom portion having a bottom surface for contacting the sliding surface, and a side portion. A ledge integral with the hull extends in a direction parallel to the longitudinal axis and forms a discontinuity separating the bottom portion and the side portion. By leaning sideways, a rider can cause the ledge to contact the snow, thereby turning or braking the sled.

Abstract: A sled includes a hull having walls defining an inboard hole. A lip extending outward from the hall forms an outboard hole opposed to the inboard hold. A support member extends through the inboard hold and the outboard hole, as well as through the hole of a strap, thereby securing the strap to the hull.

Abstract: A sled includes a hull extending along a longitudinal direction and having an inner surface for accommodating a rider. A pad on the inner surface includes a ribbed portion a deformable ribs. The ribs grip the shin of a rider, thereby enabling the rider to more easily control the sled.

Abstract: A sled for sliding on a sliding surface has a hull with bow and stern ends, a side portion extending therebetween, and a bottom surface for contacting the sliding surface. A snow-brake integral with the hull is formed from a portion of the hull that extends outward from the hull and downward part-way to the bottom surface. The snow-brake forms a scoop for engaging the sliding surface when an angle between the hull and the sliding surface exceeds a critical angle. The critical angle is selected such that the bottom surface contacts the sliding surface while the snow-brake engages the sliding surface.

Abstract: An ice transporting assembly transports ice and includes a sleeve and a tapered auger. The sleeve defines a frusto-conically shaped channel with an inlet having an inlet diameter and an outlet having an outlet diameter less than the inlet diameter. The tapered auger is mounted for rotation within the sleeve and is sized and adapted for positional agreement with the frusto-conically shaped channel. Ice at the inlet is transported through the frusto-conically shaped channel and out of the outlet by rotating the tapered auger about a rotational axis. Another embodiment of the ice transporting assembly includes a reducing sleeve having an upstream conduit section with an upstream conduit diameter, a downstream conduit section with a downstream conduit diameter less than the upstream conduit diameter and a tapered conduit interposing the upstream conduit section and the downstream conduit section. The tapered conduit defines a tapered channel that receives the tapered auger in positional agreement.

Abstract: A recreational snow sled comprises an elongated molded plastic shell having a longitudinal central rib forming a U-shaped bottom channel of gradually increasing depth toward the rear of the sled. The sled is designed to carry a person seated in a kneeling position straddling the hump formed by the central channel. The rider is restrained at the knees by a strap running across the forward gunwales of the shell. When the sled is sliding downhill, the central channel tends to form a ridge of packed snow enhancing axial stability and maneuverability. The angle of attack may be controlled by leaning backwards so that the front of the sled is tilted up by the knee strap.