What was the declared purpose of the rubber ring and for what was it actually used? This question has not been answered yet! Don't worry! You can check out similar questions with solutions below what was the use of rubber ring? for what purpose is the tuning fork actually used? ... is that the plans actually uses of and what becomes of its? ... Lt q0-0 mean?? what is the actual use of it?....i mean how ... ... and where they are actually used there is some confusion ...