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One of the things that got me hooked (no pun intended) on sewing machines was
my fascination about how two loops of thread could be intertwined without
cutting and re-splicing them. I studied the bobbin & hook mechanism and was
amazed how someone could even think of such a design. Basically the Lock-Stitch
is a continual tangling of the thread into a sequence of twists. Below is an
animation of a Rotating Hook assembly. When I get a chance I will create
an animation to show the oscillating hook assembly.
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