| 摘要 |
A pre-assembled sub-assembly of a plate carrying a needle bar on an oscillable cradle is mounted in a head at the free end of the upper arm of a zig-zag sewing machine. The upper edge of the plate is pivotally suspended from and slidable along a transverse bar. The plate is angularly fixed with the bore of a member on the needle bar in alignment with and receiving a gudgeon of a crank rod driven by the principal shaft of the machine, and is fixed on the bar to align the needle bar for cooperation of the needle with a shuttle hook. |
