This ad from the 1918 Sears catalog is often cited by ubicomp people (including me, in my upcoming talk to the IA Summit) as an example of how electric motors stopped being special things and disappeared into our tools, with the point being that computation is likely to do the same. They refer to the sewing machine attachment when it's discussed. But one thing that I don't see many citations for is for the other interesting attachment in this ad. The one that's second from the bottom, the one right above the grinder. Yes, that's the one, the one for the vibrator. Sears was right, it really is an ad for "Aids that every woman appreciates."
(click through for the big ad--and, yes, I know there was probably some other justification for vibrators, but, really, I'm sure everyone knew what was up)
home motor, indeed!