Derailleur gears designed and built in the late 19th century. One example is the Protean two-speed derailleur available on the Whippet safety bicycle. The French bicycle tourist, writer and cycling promoter Paul de Vivie (1853–1930), who wrote under the name "Vélocio", invented a two speed rear derailleur in 1905 which he used on forays into the Alps. Some early designs used rods to move the chain onto various gears. 1928 saw the introduction of the "Super Champion Gear" (or "Osgear") from the company founded by champion cyclist Oscar Egg, as well as the Vittoria Margherita; both employed chainstay mounted 'paddles' and single
French articles and determiners the English definite article "the", although they are sometimes omitted in English. The French definite article can vary according to the gender (feminine or masculine) and number (singular or plural) of the noun. The definite article takes the following forms: Like "the", the French definite article is used with a noun referring to a specific item when both the speaker and the audience know what the item is. It is necessary in the following cases: Unlike "the", the French definite article is also used with mass nouns and plural nouns with generic interpretation, and with abstract nouns. For example: The