Abstract: The invention relates to a method, a device and a method for installing a cable in a tubular cable duct. In the method, the foremost end (3) of the cable (1) in the duct (10) and subsequent portions of the cable are first accelerated in a short time with continuous supply of further portions of cable from a torsion-free store. Then, from the instant a certain speed v is reached, the cable is maintained at a tension such that, at said speed and tension, centrifugal forces in bends and inwardly pulling components of tensioning forces in the cable compensate for one another at the position of said bends, the further portions of the cable being supplied at a supply speed such that the part of the cable already fed into the duct can continue to slide on the basis of its mass moment of inertia.

Abstract: The invention relates to a method, a device and a method for installing a cable in a tubular cable duct. In the method, the foremost end (3) of the cable (1) in the duct (10) and subsequent portions of the cable are first accelerated in a short time with continuous supply of further portions of cable from a torsion-free store. Then, from the instant a certain speed v is reached, the cable is maintained at a tension such that, at said speed and tension, centrifugal forces in bends and inwardly pulling components of tensioning forces in the cable compensate for one another at the position of said bends, the further portions of the cable being supplied at a supply speed such that the part of the cable already fed into the duct can continue to slide on the basis of its mass moment of inertia.

Abstract: The invention relates to a device for stacking flat articles, such as postal items. First guide (9), which form part of a stacker head (7) and which bound a stack of articles (2) already stacked in a stacker bed (1) in a plane of stacking (D), carry out an imposed to-and-fro pulse movement between a rest position (A) and an outermost position (C) transversely to a supply line (3) and in line and level with the stack to make stack space for a short time for an article (2.2) to be stacked, which article is entering at that moment via the supply line (3). The pulse movement can be realized by hanging the first guide (9) on the one hand by way of a first set of parallel leaf springs (17, 18) to a frame part (19, 20, 31, 32) in such a way that they can swing, and on the other hand by coupling them to the driving end (28) of drive (25, 26) carried on bearings in the frame part.

Abstract: Switch, forming part of a mail sorting device and comprising, according to the invention, one or two rotatable or translatable switch vanes (7), which are driven, by way of one or more curve followers (6, 22) and one or more curve discs (8, 23), by one electromechanical converter, e.g. a tachometrically controlled direct-current servomotor (12). In this case the transmission ratios have been chosen in such a way that the external (virtual) mass moment of inertia is about equal to the internal mass moment of inertia of the motor. The invention can also be utilized for other quickly intermittent drives.

Abstract: A device for detecting postal articles unsuited for mechanical handling is equipped with a bed of belts formed by a large number of side-by-side resilient belts (2) assembled with predetermined tension around two pulleys (3,4), which can turn freely around shafts fixedly mounted on a base plate. A conveyor belt passes over a guiding roller (6) opposite the bed of belts. The conveyor direction of motion is deflected around the roller and the bed of belts is taken along by the conveyor belt (1) by means of friction. An article on the conveyor approaching the guiding roller while moving between the conveyor and the bed of belts is subjected to a bending force when passing the guiding roller. The belts of the bed of belts here work as scanning elements. Deflection of one or more of them from the normal path, away from the guiding roller (6), can be detected by a combination (11) of an infrared radiator and a detector.