Coil Spring

Resilient *coil springs* are used in various places in the ToneGenerator:

• The synchronous motor operates with a series of pulsations, one each half-cycle. Between the SynchronousMotor and the drive shaft is a coil spring which dampens these pulsations. Without the coil spring, the pulsations would impart a 120Hz vibration in the drive shaft which would, in turn, affect the quality of the sound.
• The drive shaft has several sections. Between each drive shaft section is a coil spring. If each section were rigidly connected together, any irregularity in the alignment would cause unwanted vibration in the ToneGenerator and could affect the qualify of the sound.
• Each DrivingGear is connected to the drive shaft with coil wire spring couplings. If the driving gears were coupled rigidly to the motor, any irregularity between the driving and driven gears would carry extra frequencies into each tone wheel.
• The tone generator is has a spring suspension system to minimizes the transmission of mechanical vibration between the console cabinet and the main generator. The spring suspension should be locked down whenever the organ is moved (See LockingDownTheToneGenerator). The suspension should be unlocked when the organ is being played.