Abstract: A resilient steering stabilizer for cycles, e.g. a bicycle is provided wherein a pair of crank arms, one on each side of the steering fork of the cycle connects respectively with a pair of pivot arms which turn on a common axle mounted on the cycle frame. Each pivot arm turns against and compresses helical springs mounted on such frame, on both sides of the axle, which springs resist excessive turning of the steering wheel of the cycle. The stabilizer of the invention is, in brief, a centering device which, by spring compression, tends to center a cycle steering wheel or other desired apparatus component.

Abstract: An apparatus which cuts web, eg mat board, in several directions is provided, which includes a knife carriage which rides on moveable rails over the mat board, the knife carriage having mounted thereon a rotatable blade assembly which indexes the blade to four 90.degree. positions. The blade is retractably mounted in the blade assembly at preferably a bevel angle. Accordingly, the apparatus can rapidly cut a rectangular mat board picture frame or cut or score other patterns.

Abstract: A warm-up bat with a closeable hollow chamber with granular weight material therein is provided to result in a practice ball bat with a distributed weight or bat-like feel. The bat is made in two sections. A handle section and a rigid tubular section. The tubular section is larger in diameter than the handle section and has a chamber therein. The handle section has one of its ends telescoped into one end of the tubular section and fastened therein; the other end of the handle section being engagable by a batters hands. The chamber of the tubular section is filled with a flowable weighting material such as sand and the other end of the tubular section is closed to retain the weighting material in the chamber.

Abstract: In a closed Stirling Cycle system gas, such as dried air, is heated and expanded within a power piston chamber, driving the power piston outwardly of the chamber into contact with a cam groove of a flywheel, rotating the flywheel. When the power piston reaches the top of its stroke, the cam slope reverses, and drives the power piston back into its chamber expelling the heated gas therefrom into one or more cooling chambers, cooling and contracting the gas which is then charged into a recovery piston chamber, driving the recovery piston outwardly of its chamber into contact with another cam groove of the flywheel. When the recovery piston reaches the top of its stroke, its cam groove reverses and drives the recovery piston back into its chamber, expelling the cooled gas therefrom back to the power piston chamber recommencing the power cycle to drive the flywheel. Preferably, several pair of power-recovery pistons operate out of phase to drive the flywheel.

Abstract: A light coagulator for treatment of eye disorders is provided, utilizing a converging light beam, a collimated lens system and a mirror to deliver a high powered beam of light to the eye for use as a surgical tool. The light coagulator of the invention is of simplified design and portable.