PERFECCIONAMIENTOS EN LOS SISTEMAS CINEMATICOS CON DOS ORGANOS ANIMADOS DE MOVIMIENTO DE DESLIZAMIENTO ALTERNATIVO.

摘要

There is provided between a needle plate (9, 10) and a slide (6) which is interposed between a trunnion and a track a return spring (14) formed by a wire of resilient metal having at least one coil (C) which surrounds the slide and two end portions (14b) of the wire which are hooked to the needle plate. This spring operates under bending and compressive stress in its mean plane.