Cord Drives versus Toothed Gears: Silence against Din
Three transmission studies, with bells rung by a wheel
Three horizontal transmission mechanisms fill the sheet: two are driven by cords or belts running between drums, while the lowest uses a curved-armed geared linkage. The notes contrast their behaviour — motion made with cords is quiet and noiseless, whereas motion made with pinions and teeth makes a great din. One device is labelled as bells rung by a wheel, and a closing remark compares two possible drives, h and K, that reach the same end but prefers the more feasible h since neither is more useful than the other.
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Cord drive runs quieter than toothed gearing
The note states that every motion made with cords will be much quieter and without noise than one made with toothed wheels and pinions, favouring belt or cord transmission for smooth running.
Bells rung by a wheel
A brief label identifies one of the mechanisms as bells set on a wheel, a device for ringing bells by rotary motion.
Pinions and teeth make a great din
In contrast to the cord drive, the note observes that every motion made with pinions and teeth will make a great din, weighing noise as a factor in choosing a mechanism.
Choosing the easier of two motors h and K
The closing note weighs two motors, h and K, which tend to the same end; since h is much more feasible than K and neither is of more use than the other, one should use the easy way, not the difficult.