On Tue, 02 Sep 2014 02:54:01 +0000, Drew Lawson wrote:

For some reason, I thought it was named for a person whose name I would
recognize.

You, and another poster, are confusing it with a Longworth chuck. That
one is a bit different, but serves the same purpose. See:

http://www.woodworkersguide.com/2010...ngworth-chuck/