| 摘要 |
In a tuner cord drive, a tuner drive pulley of relatively small diameter includes a radially extending arm, the outer portion of which protrudes from the rim of the pulley and anchors one end of an extended coil spring. The drive cord is wrapped about the pulley and includes a portion that extends radially inwardly through a peripheral slot in the pulley. The other, or free, end of the extended spring is affixed to the mentioned cord portion, thereby introducing tension in the drive cord.
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