
An invention shading light to the socio-history of Bonneuil quarry basin: the roadheaders with rotating drill bits.
par Lamesa, A., Gély, J.-P. et Launay, G. AbstractThe Bonneuil quarry basin is located in the North-East of Paris; it played a role in the well-known stone trade for Paris and its surroundings in the nineteenth and the beginning of the twentieth centuries. Stonecutters of this area mainly used the extraction with the lance, a long iron spin bear by a scaffolding. This tool helped the quarrymen speed up their work allowing them to be competitive in trading. At the end of the 1930s, Martial Lefèvre, a wealthy owner of quarries in the Bonneuil’s basin, created a machine, roadheaders with rotating drill bits, following the movement of his quarrymen using the lance. The story of this machine was also involved