I was just submitting Cancars's website on soda can hot rod models to the Make blog, and saw that they listed this site on 20th century hand tools: Alloy-Artifacts.com. Lots of great pics of early Snap-On, Craftsman, and other 1900's hand tools, history on tool companies, and patent details.
Here's a sliding extension socket wrench, from Blackhawk Manufacturing, circa 1922-1924:
And here's a wire-handled ratchet, circa 1910-1918:
Here's the site again: Alloy-Artifacts.com.
Here's a sliding extension socket wrench, from Blackhawk Manufacturing, circa 1922-1924:

And here's a wire-handled ratchet, circa 1910-1918:

Here's the site again: Alloy-Artifacts.com.