March 18, 2016:
In a bungalow attic with little soffit ventilation, rely on forced flow of an AC powered fan, out a South gable, for Summertime attic cooling. For best use of a too-small gable vent, remove its fine screen. Guide air flow to the gable louvers with angled lumber. Rely on a large screen over the fan inlet to keep out bugs. The screen of maximum size will not much obstruct flow, and will be easily cleaned of carried dust. Seal all against fan bypass of discharge to the outside, and of critter paths. This stackup was not trivial.
I find no relevant patents.
and this roof detail:
"Box chimneys" enhance chimney effect natural draft.
Draw from a cooler, low area of an attic?
I recall similar box chimneys or vent risers, in Denia, Spain, 2015:
In the Google search, try instead with quotes on aperture box:
I am at the top of this search, seemingly with original use of the phrase.