APPARATUS FOR THE SUCCESSIVE AUTOMATIC CONTROL OF AT LEAST TWO PROCESSES OR OPERATIONS

摘要

The device has two coaxial jacks (3,7). One jack piston (4) has a large travel while the other (8) has a small travel, and a device (15) transfers the pressure of one jack to the other when a predetermined pressure has been attained in the first jack. A force multiplication system of levers (9-14) is interposed between the small travel jack piston or piston rod and the forward working piece (22) to sustain a low amplitude movement with a large force. The lever system is a system of simple or multiple elbow joints and the large travel jack pulls or pushes according to its supply direction.