[dray]

Well, I had to wait a while to get a couple of 2" #20 Torx tips to give it one last try and both "bit" the dust in vain. I then started cutting away the body of the chuck ( as was suggested by gdea) exposing the three jaws. By cutting all three jaws through to the round( I don't know what to call it) I found that whatever had jammed the chuck had been released!!! Probably one of the jaws had become misaligned and prevented the chuck from screwing.( A terrible thing indeed!!) Anyway, I wanted to thank those of you who responded and relate what turned out to be a fairly easy fix to my problem- at least when I finally tried it.. (Or was I just lucky-I don't know!)