This morning I was reading the March 1975 issue of "Wielersport", a Dutch cycling magazine, and came across an interesting article. Loosely translated, it said:

"In America, the land of unlimited possibilities, an automatic transmission has been constructed for the bicycle. When riding faster a higher gear is selected automatically.This invention will be shown on the international biclycle show in New York. (...) We don't yet expect to see it in this year's Tour de France."

I don't think I ever saw it in the Tour de France. What became of this invention? Are there any automatic bike owners on the forum?