First two images from U.S Patent 3248703, showing a Handley-Page design.
Full patent http://www.google.com/patents?id=dtVsAAAAEBAJ&printsec=frontcover&dq=3248073&hl=en&ei=lS-TTrmdA8THswa-oJQj&sa=X&oi=book_result&ct=result&resnum=1&ved=0CC8Q6AEwAA
The second two images from U.S Patent 3112088, with a Westland design.
Full patent http://www.google.com/patents?id=HIFuAAAAEBAJ&printsec=frontcover&dq=3112088&hl=en&ei=FTCTTsCCK9DBtAb947kX&sa=X&oi=book_result&ct=result&resnum=1&ved=0CC8Q6AEwAA