IPC 2013 : D03D 51/16 : for varying speed cyclically.

IPC2013 > D > D03 > D03D > D03D 51/00 > D03D 51/16[1] > for varying speed cyclically.
Notes[t] D01 - D07: TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D SECTION D — TEXTILES; PAPER.
D03 WEAVING.
D03D WOVEN FABRICS; METHODS OF WEAVING; LOOMS.
D03D 51/00 Driving, starting, or stopping arrangements; Automatic stop motions.
D03D 51/16 · for varying speed cyclically.