Thermal pair of manual tongs for the application of hinges in spectacle frames of a thermoplastic material

摘要

A manually operated pincer-gun utilizing electric current for heating metal hinges of a thermoplastic eyeglass frame during a repair operation includes a pair of electrically insulative hand grips, each operatively connected to an arm having an electrically conductive extremity. The hand grips are pivotally connected together such that the hand grips and the respective arms and extremities are movable toward each other. An electrically conductive heating tip and an electrically conductive picking-up tip are provided on the extremity of each arm and the secondary of a step-down transformer controlled by a pedal switch is connected to the respective extremities to supply heating current to the heating and picking-up tips. The heating tips form a pair of pins extending substantially parallel to each other to be able to be placed on the base of the hinge to apply electric heating current thereto to soften the eyeglass frame around the hinge for insertion or extraction of the hinge. The picking-up tips form opposing tapered heads able to penetrate into the eyeholes of a hinge to apply heating current thereto. One of the extremities is provides with an extracting tip having a sharp end tooth extending perpendicularly outwardly therefrom. The heating tips are disposed at a 90 DEG angle relative to the picking-up tips and the hand grips are biased away from each other to keep the tips and extremities apart.