Patent ID: 7300202
Filing Date: 2007-11-27
Classification: G04B

Abstract:
1. A clock, comprising: a main body having a lower space and provided with a protruding post extended into the lower space; a face plate mounted on the main body and formed with a plurality of holes; a tumbler mounted in the lower space of the main body and rested on the protruding post; a top cover mounted on the main body to form an upper space; a plurality of rolling balls mounted in the upper space and placed on the face plate; wherein the main body has a receiving space defined between the face plate and the tumbler; wherein when the diameter of one of the rolling balls is greater than that of the respective hole of the face plate, the rolling ball is locked in the respective hole of the face plate, and when the diameter of one of the rolling balls is smaller than that of the respective hole of the face plate, the rolling ball is extended through the respective hole of the face plate and dropped into the receiving space.