Patent ID: 9613602
Date: 2017-04-04
CPC Classifications: G10D

Claim:
1. A tensioning system for simultaneously tuning and securing top and bottom stretchable vibrating membranes to a cylindrical shell, comprising: a top hoop with a cylindrical rim parallel to the cylindrical shell, facing inwardly of the top membrane and having a clearance space between said rim and cylindrical shell; a bottom hoop with cylindrical rim parallel to the cylindrical shell, facing inwardly of the bottom membrane and having a clearance space between said rim and cylindrical shell; a cable that runs between said top hoop and bottom hoop within the respective clearance spaces of the top and bottom cylindrical rims; tensioning means for tightening said cable; wherein said tensioning means is mounted on the cylindrical shell so that when said tensioning means is tightened, said top hoop and bottom hoop are simultaneously pulled toward each other by said cable thereby simultaneously stretching the top and bottom membranes.