Triggering device of working effort of the triggers of portable firearms. (Machine-translation by Google Translate, not legally binding)

摘要

A device for checking the effort of the triggers of portable firearms, consisting essentially of two hollow metal cylinders of different diameters, closed at one end and inserted one at its open end into the other, being forced to stay in such position by the action of a strong spring that is held at the bottom of its closed ends, the surrounding cylinder having a longitudinal window whose edge has a scale graduated in units of force and by which an index Fixed to the inner cylinder, which points at each instant with its displacement the force that, through a piece attached to the closed end of the inner cylinder, is done on the trigger whose work effort is measured. (Machine-translation by Google Translate, not legally binding)