1895 Patent for a "Racing Index for Home Trainer Cycles"
From the patent application:
The idea of the invention is, to form a game or sport by which persons can contest against each other on home trainer cycles; a model on the track representing each contestant and the faster either person pedals his home trainer cycle the faster will the model representing him, travel on the model track.
In other words, you pedal your stationary bike and the little bike in front of you races your opponent (at the correct relative speed, hopefully).
Looks better from this angle . . .
Perhaps a modern version focusing on the exercise and "fun" aspects would be suitable for a Kickstarter funding proposal?
I think a proposal for funding a modern racing trainer duo cycle thing would do better than yet another Kickstarter LED cycle lighting proposal - enough, already.