The gear in a governor which is engaged with the endless screw and is mounted on a shaft which has a pinion that engages the first wheel, which in turn is mounted on a shaft that has a pinion that engages the great wheel. This is the wheel that transfers speed regulation from the endless to the cylinder. Synonym: escape gear or worm wheel.

A comb in a cylinder musical box which is made from separate sections of teeth, typically from one to five rather than as one piece of steel. Late 18th, early 19th century.

See tune

A cylinder musical box in which the cylinder rotates in a normal fashion and is laterally shifted at one position during its rotation. To enable longer-than-normal pieces of music to be played, arrangements are made for the musical pinning to be continued during the time when the cylinder is making its lateral shift in what is known as the "dead space." There is also a secondary mechanism which prevents the mechanism from stopping in the normal way after one cylinder revolution.

See bird organ