Subclass 1/26: Spinning or twisting machines in which the product is wound-up continuously (open-end spinning machines D01H 4/00) Details (drafting arrangements D01H 5/00; twisting arrangements D01H 7/00) Driving or stopping arrangements (for open-end spinning machines D01H 4/12, D01H 4/2, D01H 4/42; safety devices D01H 13/14) for twisting arrangements, e.g. spindles (braking arrangements for spindles D01H 7/22; interrelated flyer and bobbin drive mechanisms D01H 7/5) with two or more speeds; with variable-speed arrangements