Cyclo
Cyclo was founded in 1923 by Albert Raimond (1885-1953) at Saint-Priest-en-Jarez, near Saint-Etienne, one of the giants of early derailleur history. A member of the 'Ecole Stephanoise' alongside Paul de Vivie (Velocio), Raimond commercialised Claudius Bouillier's patented mechanism in which a peg rides in a helically grooved shaft, operated by a twin-cable arrangement, to move the chain across the freewheel. Run as an organised, professional operation in a derailleur world of tinkerers, 'Le Cyclo' became the dominant touring derailleur for a generation, and a British licensee (the Cyclo Gear Company, Birmingham) followed in 1932.