Abstract: An elastic energy storage device has an energy storage unit which has an axial rod penetrating through a plurality of rotary disks and spiral springs. One side of each rotary disk is protruded with an outer edge buckling post and another side thereof is installed with an inner edge buckling post. Each two rotary disks are installed with a spiral spring. The casing is installed with a unidirectional power output shaft for driving the first rotary disk of the energy storage unit to rotate. The speed change box has an input shaft and an output shaft. The input shaft is connected or engaged to the rotary disk; and one of the rotary disks of the energy storage unit at an innermost side has a function of driving the input shaft to rotate. Thereby, the at least one spiral spring stores energy through a flywheel and then release the energy steadily.

Abstract: An infant swing includes a uni-axial weight-biased pendulum escapement motor actuator with a weighted body that glides up and down one of the support legs of the swing and a rewind apparatus having a coiled torsion spring which rewinds the weight cord around a reel when the weight is repositioned to a position of potential energy useable for actuating the swing, and an axially biased unidirectional slip clutch. The swing also includes two rear legs which extend downwardly from a frame to support the swing in combination with two similarly downwardly extending front legs, the rear legs being foldable into parallel relation to the front legs for transportation and storage.

Abstract: A revolving hanger for a planter in which a motor is employed to revolve the hanger support. This motor is preferably a weight operated motor with suspended weights which are located in the area normally occupied by the cords supporting the planter so that the weights are relatively unobtrusive. Because of the use of a weight wound motor, it is possible for the user to readily wind the motor while standing on the floor by moving the weight to the desired elevated position for initiation of the rotation of the planter.