Spiral Escalator

Layout diagram from Architecture Building Schematics.

A-Frame Doll's House

Plans via Dinosaurs and Robots.

HMS Dreadnought

Great cutaway of boiler room C from John Robert's "The Battleship Dreadnought,"

Via Daryl Carpenter. 

See here to look at the original with the annotations.

Avrocar Schematic

Via Wikipedia.

VF-1J Valkyrie Battroid

Great section/schematic/detail/call it what you want.

Via This Place...

Dymaxion Car Patent

By Buckminster Fuller via The Inductive.

Power Lace Nike

I think MJF needs self lacing shoes at this point...

From Cromeyellow.com.

Situationist Drawing Device

Situationist Drawing Device from Ji Soo Han on Vimeo.

I'm not going to even try to explain what this is - just read more at the inventor, Ji Soo Han's, site. Love the drawing - there is another great one at the site too.