| 摘要 |
A pitch control assembly for adjusting the tension on a drum head of a musical drum having a cylindrical body portion with an open end covered by the drum head, a flesh hoop attached to the periphery of the drum head, and a tension band for engaging the flesh hoop to apply tension on the drum head. The control assembly includes a rotatable tension adjusting ring encircling the drum body portion and having a plurality of circumferentially spaced apart slots inclined to the plane of the drum head, a plurality of abutments on the drum body portion to hold the adjusting ring against movement toward the drum head, connecting links that connect the tension band with follower members arranged in contact engagement with sidewalls of the slots in the adjusting ring, and an adjustable mechanism connected to the adjustng ring and the drum body portion for rotatably adjusting the ring relative to the drum body portion.
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