Nice selection. I think I see a few that I don't have.
For background:
During the war years, McGraw-Hill as part of their war effort abstracted published material from Aviation magazine and printed it in what became a series of Aviation's Sketchbook of Design Detail looseleaf collections. Their stated intention was to make details of design and production techniques and details available to professionals in the aviation industry.
From the preface to the Third Editioin:
"In revising this popular Sketchbook for its third edition, Aviation's Editorial Staff have included only those sketches which present a fairly well-rounded picture of the construction details of most types of aircraft engines, armaments and structural parts.
With the continued pressure on the aviation industry for improved design, we feel that this book will be particularly welcome because its extraordinary reference value can easily result in the saving of many valuable hours."
I scanned and cleaned up the First and Third Editions. There are a couple of hundred pages between the two editions.