Is there some trick to tensioning the balance spring on a second hand
There are no obvious holes where a locking pin could have been removed
and trying to do the job in situ is way beyond my strength.
Unlike a domestic window blind, the shaft has a square section at both
ends so you can't just lift one end and wind on some tension. The slats
weigh about 75kg so lifting without mechanical aid becomes progressively
harder as slats are wound on!
- posted 12 years ago