DRZAC ALATA SA UPRAVLJANIM POMERANJEM ALATA

摘要

A control system for a tool holder which is attached to one of a pair of elements which are hinged together at one end and are normally urged toward each other at the other end. A control member such as a push rod extends through a hole in the other of the elements and actuates a lever in a chamber between the two elements. The end of the lever away from the control member is held between two relatively closely spaced fulcrum points on the two elements so that a given movement of the control member results in a substantially reduced corresponding arcuate movement being transmitted to the element carrying the tool holder. Preferably the lever has a pair of opposite blind passages having partially overlapping cross-sectional contours with a wafer of resilient plastic material interposed in the bottoms of these passages, and with bearing studs connected to the two elements being received in the passages and engaging on opposite sides of the wafer.