https://newatlas.com/eton-rukus-frx-series/21037/
Eton (hand) cranks out new self-powered products at CES
May 2, 2015 - CES Unveiled saw Eton displaying its new FRX Series of self-powered safety radios and its new battery- and solar-power Rukus portable Bluetooth sound systems.
hand cranksnew selfpowered productsetonces
https://wellcomecollection.org/works/fhfprsk3/images?id=xuya4k7k
Merlin's mechanical chair for the elderly or infirm: the design incorporates hand-cranks, wheels,...