Originally Posted by
Champanier
Thank you very much for trying, but that is the patent for their Lockstitch machine (later sold as the #9)
This is a double chainstitch machine. It uses a curved upper needle that has a full length groove on BOTH sides. It also uses a semi-circular oscillating lower "needle" that uses the lower thread spool (yep, this is sorta the original two spool...)
The stitch is does is also VERY unique. It is one of the few "stretchable" stitches made. It was not overly popular because it used three times the amount of lower thread as a regular lockstitch machines. (back then thread was EXPENSIVE)
This picture is from the cool site sewalot
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