| 摘要 |
<p>1,231,037. Push-pull cables. ETABS DE MACHINES INDUSTRIELLES. 27 Aug., 1968 [11 Sept., 1967], No. 40931/68. Heading B7E. [Also in Divisions B3 and F2] An assembly for controlling a flexible cable comprising two strips 10, 11 twisted together one within the other to helical form consists of means to clamp the guide strip 10 to a fixed abutment 13, 14, 15 (Fig. 2), the ends of the strip 11 being secured to pistons 17 rotatable and axially movable in tubes 16 fixed to the abutments. Each piston 17 is rotatably secured to a sleeve 18 slidable on the respective tube 16. When one sleeve 18 is moved axially, the strip 11 is given combined axial and rotary movement to move the other sleeve 18 axially. In a modification, the guide strip is rotatable but is axially located, and the strip 11 is axially movable but not rotatable. In Fig. 10, the ends of the strip 11 are secured to screws 37 screw-threaded into non-rotatable pistons 32 or slides, the screws having the same pitch as that rotation of the strip 11 during operation causes equal movement of the end screws in their pistons or slides, so that the effective length of the strip is unchanged. The input slide may be a rack bar (39) (Fig. 9, not shown) moved by an input pinion (42). In Fig. 11 (not shown) a rotatable and axially movable hand wheel simultaneously operates two strips (11, 11<SP>1</SP>), relative to respective guide strips (10, 10<SP>1</SP>).</p> |
