Abstract: Methods and apparatus for attaching lenses to a frame includes a lens carrier having one or more eyeglass lenses installed in one or more eye wires or rims that partially or completely encircle the lens. The lenses are joined by a nose bridge. The lens carrier includes a nose bridge spacer region and optionally a clamp that reversibly engages a brow bar or frame.

Abstract: Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface.

Abstract: A net system for volleyball, badminton, and the like includes first and second piers and a net with top and bottom supporting cables extending between the piers. The piers each include a base, net pole, and net tensioning spring. The bases each include longitudinal and lateral platform members, and a ground anchor. Each net pole is removably attached to its base and extends up from it. The net tensioning springs are cantilevered leaf springs, each removably attached to its base and extending up and away from its net pole. The net supporting cables pass through the net poles for attachment to the springs. The springs are flexible toward and away from their net poles in the plane of the net.