Swinging firmness, perfected (Machine-translation by Google Translate, not legally binding)

摘要

Improved tilting firing, characterized by having an internal extensible element between its two coupling parts, constituted by a helical spring integral therewith, as well as pivots with their corresponding fittings in the opposite piece, which keep them fixed in their coupling and that, when displaced from their accommodations, act as support for the other piece. (Machine-translation by Google Translate, not legally binding)