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East Bergholt, Suffolk (2)

St Mary, East Bergholt - the earlier movement, 18C

The interesting feature of this anonymous single-wheel striking

system with worm-driven vertical fly. The pins on the front of the wheel act as the countwheel, while those on the rear operate the hammer (Figure 6). At the same time the teeth on the rim

drive the worm to provide a large reduction ratio, allowing the

main wheel to move slowly enough.

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Uploaded on January 5, 2009
Taken on January 5, 2009