Is this a game? Hmm, guess. The thing that puts air in backyard pool?

It may linkage thing to connect old style 3 speed bikes brakes to the brake lever. There are 3 speed bikes that uses linkages instead of cables. I seem to recall seeing something like that. But if I was to narrow it down, my guess is that it has to do with some type of cabling that goes internally. So my choices would be geartrain or brakes.