Larry Jaques fired this volley in
:

No, what I want is a flush-in-the-floor when it's down, and a poke-up-
from-the-floor when it's up kinda deal. I want this in the floor so
the
door is free to swing open until it gets to the stop - or beyond it
when
I have the stop locked down.


If it's at all in a dirty environment (like a shop floor), you'll not be
happy with such.

Although not the style you asked for, here's one form of mortised stop:
http://www.replacementboatparts.com/popupdoorstop.aspx

Lloyd