Patent ID: 6051763
Filing Date: 2000-04-18
Classification: G10F

Abstract:
A music box, in particular for musical movements, snuffboxes, toys, stuffed animals, boxes, and various display units, meant to produce at least one tune, comprising:two identical frame halves;a central axis rotatable supported by the frame halves;two cylinders freely supported by cores firmly attached to a central axis;at least one spiral spring one of whose ends is firmly attached to the core and the other end firmly attached to the cylinder;a roller driven by each cylinder and equipped with lifting cams working in conjunction with at least one spring pin made to produce a note of the referenced tune, the spring pins being arranged in such a way as to produce all of the notes of the tune;a system for regulating the speed of the cylinder;a drive mechanism for the referenced system for regulating the speed of the cylinder, said drive mechanism having a large sprocket, a medium sprocket, and a small sprocket; anda rewinding mechanism arranged between the two cylinders and having a shaft firmly attached to a ring gear, the ring gear working in conjunction with a sprocket firmly attached to the central axis and arranged to retain the spiral spring.