Abstract: A belt drive variable gear transmission system is provided. The system includes a drive disk which has a peripheral running surface for engagement with a drive belt. The peripheral running surface of the drive disk may include a toothed profile. A drive belt is included having a V-shaped profile with angled flanks in a relatively flat inner peripheral surface for engagement with the peripheral running surface of the drive disk. A tension roller is provided in running contact with the drive belt and is movable so as to vary tension on the drive belt thereby varying the transmission ratio of the system. The system further includes a spring washer disengagement disk. The disengagement disk includes two halves which are movably spaced from each other by means of a spring device. The disk halves include angled surfaces in running contact with the angled flanks of the drive belt.

Abstract: The instant invention relates to a travelling mechanism of automatic service carriages for spinning or twisting machines. The invention includes a travelling mechanism having a supporting wheel mounted in a pivot bearing, the guiding axis of the pivot bearing coinciding with the central vertical axis of the supporting wheel. The pivot bearing is connected via a connecting link to a swivel bearing installed on the travelling gear. The connecting link is arrested on either side by a fixed stop and a swivelling latch.