Abstract: Spring modules for an adjustable sleeping system. At least some of the example embodiments are spring modules comprising: a spring rail, and a plurality of adjustable spring assemblies spaced along the length of the spring rail. Each adjustable spring assembly may comprise: a motor with a stator coupled to the spring rail via a load cell, a lead screw coupled to a rotor of the motor, and the lead screw extending above an upper surface of the spring rail, a spring plate coupled to the lead screw, and a main spring coupled to the spring plate. A tubular sock disposed over the main spring, and a compliant insert can be disposed between adjacent main springs to inhibit side loading and maintain the main spring in upright relation with the spring rail.

Abstract: A folding knife includes a handle, a pivot axle, a knife blade, a spring and a catch mechanism. The handle has an elongate opening and the pivot axle is adjacent one end of the handle. The knife blade has a tang at one end thereof that is pivotally mounted to the handle for pivotal movement about the pivot axle. The spring is at least partially fitted within the handle and fitted about the pivot axle for urging the knife blade from a closed position toward an open position. The catch mechanism releasably secured the knife blade at or near its closed position despite the urging of the spring.