Discussed on multiple threads, including the Snap-on thread. If you want to see others, search the Snap-on thread on "ratchet adapter." Quickest way to find it if it's not on Page 1 at the moment is to use the A-Z Index of Threads in the Sticky titled READ B4 POSTING! at the top of the forum.
To add just a little more detail to OTG's info..., that had to be produced sometime between 1920, when Snap-on applied for the patent, and 1923, when it was granted.