Improvements in the bipartidos steel stadium for mining galleries (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the bipartite steels of steel for mining galleries that work purely by friction, characterized by an elastic device to imprison the upper surface and which in cooperation with the friction prevailing on the braking surfaces produces the required load capacity and when releasing the tin the upper part is placed at an even higher tension but located within the field of elastic deformation. (Machine-translation by Google Translate, not legally binding)