Making a Device with Action-Reaction Mechanism

[Praias]

Hello
I'm looking into ideas to make a device which can lower a small object which is at a certain distance from the ground. I was thinking of it being lowered by the action of putting some sort of weight in some sort of bucket (likely water as weight).

I just can't think of how to make it happen yet. Ideas?

Does anyone have any good websites with sort of action-reaction kind of devices? I'm doing games based on mechanisms which require some action by the user to get the desired result.

Think movies Saw but less gory!

Thanks

 

[MATLABdude]

Welcome to Physics Forums!

A device that lowers something else under the influence of gravity--maybe an anvil? (Think Loony Tunes)

On a more serious note, perhaps you can draw up what you're looking for (and then host the image elsewhere, e.g. TinyPic--this avoids your image having to be pre-approved by an administrator first). I'd have to think some kind of block and tackle:
http://en.wikipedia.org/wiki/Block_and_tackle