Greetings HorneTD,

"What is fifteen ampere about the receptacles is the blade pattern that
they are built with. "

Does this mean that everything else about the receptacle is 20 amps?
If so would it be safe to run 16 amps through a 15 amp receptacle on a
20 amp circuit? This is contrary to what I have heard but I have never
read anything either way. I know the plug of a UL listed device
wouldn't fit but imagine a 16 amp device with a 20 amp plug accessing
the 15 amp receptacle through a perfectly safe (although not UL listed)
20 amp to 15 amp plug style adapter.

Thank you for your time,
William