Problem Solved !

Hey.... Thanks a lot folks for the ideas concerning my Breaker problem! Seems that the problem was actually being caused by my battery charger for my digital camera.The receptacle that I had it plugged into,which is also on the same circuit,has become worn over the years and doesnt "grip" the blades of plugs as tightly as it should, this was causing a poor connection, which was causing the charger unit to become overheated,usually took about 3 hours or so of this "poor connection strain" to heat the charger enough to cause it to "fault " the circuit and trip the breaker .Mystery solved ! Thanks again for your offers of help !