Patent ID: 7534948

Claim:
An apparatus to create musical noise comprising: a shaker having an inner surface defining a central cavity where a plurality of impact particles are contained therein, a central base portion having a lower surface and an upper surface a frame member having a first base support surface and a second support surface a first spring member having a lower portion and an upper portion where the lower portion is supported by said first base support surface of the said frame member, a drive rod having a lower portion, a central portion and an upper portion, and comprising a lower stop member positioned below the second support surface of the frame member, the drive rod further comprising: an intermediate stop member having a lower surface and an upper surface; an upper stop member having a lower stop surface a second spring interposed between the upper surface of the intermediate stop member and the lower surface of the central base portion of the shaker so that the second spring is adapted to apply a vertical force to the shaker; whereby, the central base portion of the shaker is slidably connected to the said drive rod and is interposed between the second spring member and the lower stop surface of the upper stop member.