IPC 2013 : D05B 19/14 : Control of needle movement, e.g. varying amplitude or period of needle movement.

IPC2013 > D > D05 > D05B > D05B 19/00 > D05B 19/14[3] > Control of needle movement, e.g. varying amplitude or period of needle movement.
Notes[t] D01 - D07: TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
Notes[g] D05B 3/00 - D05B 23/00: Special-purpose or automatic sewing apparatus or machines
D SECTION D — TEXTILES; PAPER.
D05 SEWING; EMBROIDERING; TUFTING.
D05B SEWING (appliances for the tailoring trade A41H; sewing tables A47B 29/00; sewing in bookbinding B42B 2/00; sewing machines modified for knitting D04B 39/08).
D05B 19/00 Programme-controlled sewing machines (with devices for automatically controlling movement of work-carrier D05B 21/00; devices for stopping drive when sewing tools have reached a predetermined position D05B 69/22).
D05B 19/14 · · · Control of needle movement, e.g. varying amplitude or period of needle movement.