While searching unsuccessfully for more data on clipless pedal
testing, I came across this timeline, with with pictures of pedal
inventions:
http://www.speedplay.com/index.cfm?fuseaction=home.history
So much for my vague notion that clipless pedals are modern! A
clipless pedal with twist to lock unlock and with float was invented
in 1895 by Charles Hanson. Keep scrolling right, and you'll see
furious clipless invention in the next few years, but it all seems to
have vanished with the patenting of toe-clips.
(I liked the idea of a magnetic clipless pedal, 1897.)
This is the sort of thing that leads Jobst to remark that most "new"
bicycle technology has been around forever.
I also liked the 1895 comment to the left of the first clipless pedal:
"1895: U.S. has two patent offices, one for bicycles and one for
everything else."
Cheers,
Carl Fogel