What you quoted from the patent application is from teh description. You need
to pay most attention to the claims section because it is the claims section
that is actually enforceable after the patent is granted. The description is
often somewhat more general than the actual claims because the description is
designed to let "one skilled in the art" to duplicate the invention. (That is
one of the legal requirements of a patent.) Thus, the description often
includes some background and context information that is not actually part of
the claim.
Note that the claims sections begins:
"What is claimed and desired secured by United States Letters Patent is:"
Mark Holm