OSCILLATING HOOK

Point of Hook Entering Loop of Needle Thread

Fig.10 shows the first stage in stitch formation. The thread leading to the needle is loosened, because the thread take-up lever has begun its descent of the needle, after having descended to its lowest point, has been slightly raised and a loop of thread is thus

Loop of Needle Thread Enclosing Bobbin Case

Fig. 11 shows the second stage. The loop of needle thread has been taken by the point of the hook and is being passed around the bobbin case containing the bobbin of under thread. sufficient enlargement of the loop having been permitted by the descent of the thread take-up lever,