| 摘要 |
A lockstitch sewing machine is provided with a rotatable loop and bobbin case assembly providing for limited contact between the loop taker and bobbin case, and including a bracket which is affixed to the bed of the machine and is connected with the bobbin case at substantially diametrically opposite locations thereon to constrain the bobbin case angularly and rotationally but permit needle thread to be moved by the loop taker between the bobbin case and bracket during the formation of lockstitches.
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