Position transducer for fluid actuated ram

摘要

In a fluid actuated ram device comprising two co-operating elements, one co-operating element (the ram 3) is provided with a plurality of magnetically coded tracks (e.g. binary gray code) and the other co-operating element with means (e.g. inductive coils, 14) for reading each magnetically coded track to determine uniquely the position of one co-operating element relative to the other.