I have a Franklin 117 and am attaching a picture of the bobbin case instructions from a manual.
The part shown at 1 and 2 is a simple slot. The part at 4 is actually 2 layers of metal which form the
mechanism to squeeze the thread. At the position shown at 3, there is a small opening between
part 4 and the bobbin case where you pull the thread from position 2 in a down and toward the
front of the case to get it under a small pointy tang to get the thread between the 2 layers of metal
in part 4 and coming out the top of 4.
The easiest way to thread the top is left handed. Pull the thread from the spool, through the top guide and
down toward the bottom of the head. The chrome tension mechanism has a tang that faces front. Take the
thread under the tang from Front to Back, then up to the take up arm. Then go down to the little metal guide
loop on the left side of the needle and through the needle hole.
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