Abstract: Described is a transmission 1 for means of transport comprising: a driving shaft 10 suitable for being positioned on the axis (“X”) of a pedals and wheel assembly 100, an intermediate shaft 20 comprising a plurality of first transmission units 200 rotated by a gear wheel 12 fixed on the driving shaft 10, a user shaft 30 comprising a respective plurality of second transmission units 300 and at least one output 32 of the transmission 1, wherein each second transmission unit 300 rotated by a respective first transmission unit 200.

Abstract: A gear-shifting device (1) for means of transport including a pair of shafts (20-30) each including a plurality of transmission units (200) wherein each transmission unit (200) of a shaft (30) is rotated by a respective transmission unit (200) of the other shaft (20) wherein the shaft (30) is an activation shaft. The activation shaft (30) includes activation means (40) configured in such a way as to selectively rotate in an integral fashion a transmission unit (200) of the shaft (20) with a transmission unit (200) of the activation shaft (30) by generating a transient difference in speed of rotation between the slowing disk (45) operatively connected to the transmission unit (200) of the shaft (30) and the transmission unit (200) of the shaft (30). The transmission units (200) of the activation shaft (30) rotate freely relative to the activation shaft (30) in a selected configuration of the transmission unit (200).

Abstract: An automatic filing device for photos, prints and other similar materials for inserting pairs of photos arranged back-to-back into envelopes. The insertion is carried out by means of a rotating shelf (5) on which the photos are placed and a pusher (7) which slides them into the envelopes. The method of insertion is also described.

Abstract: A double-pocketed article for containing photos, prints and the like which is characterized by the fact that it has a body (1) made of of three layers: two external layers (2, 3) made with a flexible transparent film, and a middle layer (4) made with a film of a rigid or semi-rigid material, such layers being joined to each other by means of welded seams (5), so as to form two pockets (6', 6") inside which the photos and prints are inserted (7' and 7") back-to-back.

Abstract: The apparatus is capable of framing automatically photographic films by means of a first operation according to which the film is divided into several photograms and a second operation according to which the photograms are introduced into the interior of frames which are mechanically opened on one side, thus obtaining as the final product the "diapositiva", that is slide or filmslide (12).