Way once upon a time – back before Stanley bought Black & Decker – Stanley made electric power tools. I used to work in a shop where they had some old Stanley routers – probably from the 1970s. Here's a video I found of an even earlier lock mortising machine from Stanley...
It's probably the granddaddy of the mortising machine in this blog entry by Jesse Wright.
I used to own one of these, it really did the trick, but when rockwell made one I got rid of the stanley. Ken