Improvements in and reference to apparatus to form cavity in the wall of the box of a spiga type glass isolator (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in and relating to apparatus for forming cavities in the wall of the box of a spike-type glass insulator characterized in that by means of these apparatuses it is achieved that the cement inside the box and surrounding the spike tends to interlace the pin with the insulator being constituted these apparatuses by two jaw elements whose lower ends are constituted by external protuberances to form the desired cavities inside the box a structure on which said jaws are pivoted and which fits on a lower mold part in which an insulator forms an abutment that moves axially and is normally placed between the upper ends of the jaws in order to produce the unión of its lower ends a support rod of said abutment that allows its axial movement guides for the rod mounted on said middle structure of retroaction that operate on the upper ends of the jaws tending to separate said lower ends and effect the formation of said cavities when displacing the stirrup from its contact with the upper ends of the jaws easily forming said upper ends so as to be able to accommodate the displaced stirrup and stops to determine the extension of the movement producing the cavity of said lower ends of the jaws. (Machine-translation by Google Translate, not legally binding)