Abstract: A continuous coupling circulating along a closed path and having variable length links each comprising a bogie having at least one bobbin rotated by a wheeled railway system. Successive links are connected by flexible lines which wind on the bobbins and on which are carried vehicles. A supplementary parameter is introduced defined by the ratio of upstream and downstream discharge of the lines from a bogie and permitting suppression of interference phenomena and jerks normally caused by acceleration variations thus improving the comfort of passengers.

Abstract: Boring device which permits the taking of dimensions with precise tolerance, characterized in that it is designed with and comprises means which permit the taking of dimensions by deformation of the neutral longitudinal axis of the tool carrier axis, which means assure a controllable and modulatable force of a part of the tool carrier axis contained between two supports.

Abstract: The invention relates to a variable pitch conveyor or a chain in which the length of the links can be varied.Each link includes a cross-bar T.sub.i mounted between longitudinal rocking bars B.sub.i that are interconnected by linked bars L.sub.i. The bars B.sub.i are integral with a toothed sector which controls the rocking of the bars by meshing with a moving rack adapted to follow, with a variable speed, the motion of the chain.

Abstract: A continuous transport system for serving an urban region, for example, for ublic transport. The transport system includes at least one looped main track which cooperates with at least one station track. The main track conveys platforms with removable cabins disposed thereon at a constant speed, and the cabins are adapted to be transferred to similar platforms provided on the station track. The station track varies the speed of the cabins therealong to permit embarkation and disembarkation therefrom.