One of the "unique" features of Shopsmith's Sawsmith 2000 table saw was the "under the table radial arm saw" as touted in this advertisement (which I think was a horrible ad):

But, this wasn't so "unique" after all. A saw by Craftsman called the "Builder's Saw" had just this feature - way back in the late 1940s. The following is from the 1951 Craftsman catalog.)


And here's some pictures of the real thing:

You'll notice that where the Sawsmith 2000 had the pull handle in front and under the table, the Craftsman Builder's Saw had the handle mounted to the splitter right above the blade! Also, notice the index holes on the left side of the table for the second miter gauge. Pretty neat.
Anyway, I thought it was really cool and interesting and wanted to share.