surendra kumar konduru wrote:hi can we us a pair of bulls to wind a spring.
I think you could, but depending on what a person is trying to accomplish for work, there may be better ways to do it. If you have a yolk of oxen, I might suggest doing a search on youtube under Amazing Homemade Inventions. The Amish do a lot of creative things to convert animal draft power to pump water, split wood, etc.
Could you tell us exactly that you want to accomplish. I have always said that "no one person on Permies is smarter than all of us put together". It may be outside the realm of wind up technology, but if it gets the job done with what you have, that is the goal.