Abstract: A chemical sterilization process for contact lenses, and apparatus for practicing said method, wherein the lens are subjected to the anti-microbial action of a sterilizing solution, with said solution being decomposed by a catalytic agent. The apparatus of the present invention concerns primarily a capsule in which the lens are mounted, and an inverter-timer. Initially the sterilizing agent is introduced into the capsule and the catalytic agent positioned above and out of contact with said solution. The capsule is assembled to said inverter, and after expiration of a preset period, said capsule is inverted to establish contact between the catalytic agent and said solution and thereby commences the decaying reaction.

Abstract: Two coaxial rotors are connected with a counter-shaft through two pairs of varying-motion gears of opposite phase. The two gears of each pair differ from each other to provide perfect mass-balance and improved accuracy. Tooth ratios of 1:2 and 1:1 are used. The gear pitch-surfaces that roll on each other without slippage intersect the circular pitch surfaces of uniform-motion gears of the same tooth ratio and center distance and on the gear rigid with a rotor they extend further out from said circular pitch surface than on the mating gear. The tooth shape is such that on uniform rotation of the counter-shaft the rotor has a uniform rotation plus an added harmonic motion.The invention also provides a simplified production as a result of the novel tooth shape.

Abstract: A two speed manual preset timer in which the cam shaft is driven by a pair of constantly meshing gears having two mating segments of different but constant pitch radii. One pair of segments gives relatively high shaft speed in a sector of the timing range adjacent the OFF position for accuracy in short timings. The other pair of segments gives relatively slow shaft speed in a sector at the other end of the timing range for long timings. The segments of the gears are joined by transition segments of varying pitch radii, providing a sector of varying shaft speed between the short timing and long timing sectors.

Abstract: A drive transmission mechanism comprises an axially fixed rotatable primary pinion, an intermediate pinion rotatable in response to the primary pinion to effect rotation of a secondary pinion, and cam means responsive to rotation of the primary pinion to effect axial displacement of the intermediate pinion during its rotation. The rotary drive is transmitted from the primary pinion to the secondary pinion by at least one set of mutually engaging helical teeth. The axial displacement of the intermediate pinion produces a variation in the movement ratio between the primary and secondary pinions.The present invention relates to a drive transmission mechanism in which rotation of a primary pinion produces rotation of a secondary pinion.The invention is particularly concerned with a drive transmission mechanism which enables the movement ratio between the primary and secondary pinion to vary over a chosen range.

Abstract: A driver member rotates at a constant speed through and past 360.degree. and a driven member responsive to the rotation of the driver member rotates at an increasing or decreasing speed during a major portion of the 360.degree. rotation, there being a means maintaining the driver and driven members in engagement during and past 360.degree. rotation.