Samuel Blatchford, Thompson v. Hall — Opinion of the Court
“ The screws, 4, 5, serve as the fulcra for the hand-levers, g, h, having short arms, g', h', to act upon the ends of the longer arms of the jaw-levers, and turn them on their fulcra to close the jaws and bring the cutting edges together. The spring, f, opens the jaws the instant the clasping pressure on the hand-levers is relaxed. In order to move the jaw-levers equally at all times, and prevent the jaw-levers and body of the pliers turning on the handles, I have provided one hand-lever with a prong, m, having a rounded end that enters a rounded notch in the opposite lever. ”
