Abstract: A system which takes direct action to reverse the rotation of the window driving motor includes an optical fiber conductor arranged inside a substantially prismatic profile forming loops at the points where said conductor enters and exits from a series of incisions formed at regular intervals in the lateral areas of said profile. The profile is fitted inside a covering in the frame of a door. The incisions comprise a mouth for insertion of the conductor through a passageway which ends in the cavity wherein the conductor is retained by an adhesive or the like. The optical fiber conductor may be arranged continuously over the entire length of the perimeter of the frame or over parts thereof.

Abstract: A device automatically adjusts the length of a cable in remotely controlled mechanisms, such as used in automobile acceleration. A female element is fastened to a fixed point and has, at one end, a number of internal projections equipped a their opposed surfaces with inclined teeth which are capable of working in conjunction with inclined teeth provided on the external surface of a male element to which there is fixed the end of the sheath along which the remote control cable passes.

Abstract: A telescopic shaft including a male member slidably fitted in the interior of a female member. The male and female members are rotatably locked by providing, on contact surfaces, a succession of small longitudinal ribs meshing with one another. One of the members includes at least one smooth longitudinal region devoid of ribs. The longitudinal region extends from one end of the one member to an intermediate point. The longitudinal region is engaged by a projection extending from the other member. The projection is directed towards the one member and acts as an abutment against the ends of the longitudinal region to limit the possibility of one member sliding with respect to the other member to prevent disassembly of the two members.

Abstract: Telescopic shafts having a peripheral zone of a male member having grooves and ribs which grooves and ribs are interrupted longitudinally according to a sliding zone, which zone, in one embodiment, terminates in proximity to a fork member of a U-joint and in another embodiment, terminates at a limit of one of the extremes of the fork member.

Abstract: A Cardan joint is designed to eliminate the bolt normally used between male and female interfitted tubular elements for preventing axial motion and for coupling the parts so as to facilitate assembly of the shaft under any conditions, i.e. both in the factory and when the shaft is repaired. For preventing axial motion and holding the elements together, the outer surface of the male part and the inner surface of the female part have distorted cross-sectional portions. The male part has projections at one end which have a peripherally indented configuration similar to the female part.

Abstract: A high-speed fastening system includes a conventional yoke coupled to a likewise conventional shaft provided with specific fastening elements, via a vertically movable outer casing and a central body into which the shaft is inserted so as to secure the yoke to the aforementioned shaft. The auxiliary components, in addition to those already mentioned, include a catch fitted in the arch of the yoke, an intermediate sleeve inserted into the inner part of the central body, an inner spring situated inside the sleeve, and an outer spring whose ends rest in the arched part of the yoke and in the lower part of the outer casing. The shaft is fitted or dismantled from the interior of the yoke body by conventional ball bearings in combination with an annular zone situated in the insertion zone of the aforementioned shaft.

Abstract: A telescopic shaft for use in a motor vehicle steering column. The telescopic shaft comprises at least two tubular members of circular cross section which fit one into the interior of the other. The tubular members have longitudinally grooved regions which define a set of longitudinal ribs and are meshed with one another. Such meshing prevents relative rotational movement between the tubular members and allows relative axial movement therebetween. At least one of the tubular members includes at least one projection directed toward the other tubular member(s) and engaging an end of at least one longitudinal rib. Sliding of the tubular members with respect to one another can only occur when deformation of the longitudinal rib(s) engaged by the projection(s) also occurs. The telescopic shaft therefore provides a braking action whenever it is forcefully collapsed.