The de Dion tube (or 'dead axle') was actually invented by steam advocate Trépardoux, just before he resigned because the company was turning to internal combustion.
O eixe de Dion (ou 'eixe morto') foi realmente inventado por Trépardoux, defensor do vapor, xusta antes de que abandonase a compañía pois esta estaba investigando a combustión interna.