BARREL WITH SUBSTANTIALLY CONSTANT TORQUE CHARACTERISTICS

摘要

PROBLEM TO BE SOLVED: To provide a barrel having a restriction device restricting the amount of a running rotation while enabling a freely determined amount of rotation of a barrel winding mechanism.SOLUTION: A barrel 1, which is for a timekeeper, includes a restriction device 10 restricting the amount of running rotation of the barrel 1 while enabling a freely determined amount of winding rotation of the barrel 1.SELECTED DRAWING: Figure 1