Improvements in automatic government devices of electro-bombas groups (Machine-translation by Google Translate, not legally binding)

摘要

Perfeccionamientos in devices of automatic government of groups pumps electro, applicable between two upper and lower levels, characterized to be constituted essentially by two switches of mercury, mounted in floats conveniently ballasted, passing the electrical conductors through the interior of flexible and impermeable conduits, of which hang the floats. (Machine-translation by Google Translate, not legally binding)