Abstract: In the shaped junction portion, each end of the seat and back frame is deformed in order to obtain a flattened portion in a central area conveniently stiffened by thickened areas, raised edges, or protruding outer lips providing thereby for a perfect application of the shaped end of the tube onto a face of a flange of the articulation mechanism, these parts being thereafter connected together, junction studs of each flange of the articulation inclination being used for a respective centering of the part.

Abstract: The safety slide comprises a lower fixed profile and an upper mobile profile. The lower fixed profile is of a U-shaped section and is formed with vertical wings horizontally bent for forming a lower rolling path and an upper guiding path in order to cooperate with balls. Rollers are placed between the vertical wings of the lower fixed profile and bent wings formed on the upper mobile profile with stiffening longitudinal corrugations, and are guided by vertical wings of the mobile upper profile.

Abstract: Each front seat has under the base plate in its median longitudinal axis a rack connector rod and a mechanical bolt, this rack connector rod cooperating with a box joined to the floor of the vehicle via a framing and a brace, this box containing a blockable motor device. The entire afore-mentioned unit cooperates with two parallel arms first of all joined to the rear part of the seat and secondly joined to the floor of the vehicle via a spindle containing a memory constituted by a ring with a notch and the nose of the lever.

Abstract: The reversible endless screw slides are fixed by their lower fixed elements to the vehicle floor via a base plate. The base plate is mounted under at least one of the two slides and carries a profile section forming a rack cooperating with a reversible endless screw and which can be locked by a second shoe. The movement of the second shoe is controlled by a lever able to pivot against action of springs via another lever fast with an articulated control bow placed between the two slides so as to free the endless screw placed in a casing and cooperating with the rack for forming a mechanical memory for the slides.

Abstract: A device for increasing the resistance and durability of an articulation mechanism, usable to control the position of a seat, includes a fixed flange rigidly connected with the seat and a movable flange rigidly connected with the movable part of the seat; these two flanges are rotatable with respect to each other by a mechanical assembly with a locking by suitable mechanism. The fixed flange carries, close to its periphery, a fine toothing that is not normally in contact with a fine continuous circular toothing provided on a peripheral circular element of the movable flange, these fine continuous circular toothings coming in contact with each other along a given length when the articulation mechanism is distorted as a consequence of a sudden shock.

Abstract: The planet wheel has either toothings having different diameters but a same tooth module or toothings of a same diameter but different tooth modules. The toothings are produced by die stamping of a disc down to a certain depth which provides, in the median plane of the disc, a central cheek against which bear the toothings thereby stiffening each tooth for preventing it from being crushed and deformed.

Abstract: The device comprises longitudinal adjustment slides for the seat. Each of the slides has a mobile element with an upper face carrying L-shaped supports with vertical wing portions. The vertical wing portion carries at least one mechanism having a control shaft for driving a rocking lever in rotation having a front end which cooperates with an intermediate part rigidly connected to a side portion of a framework of the seat. The rear end of the rocking lever cooperates with a front portion of a second rocking lever which is articulated on the vertical wing portion and has a rear portion which is mounted in a rear portion of the framework of the seat.

Abstract: A curved slide member having an inner section and an outer section, with one of these inner and outer sections being movable relative to the other, which is fixed. A Z-shaped rack is fixedly mounted on one of the inner and outer sections. A pinion is carried by that inner or outer section on which the rack is not mounted, with the pinion meshing with the rack.

Abstract: The articulation comprises in combination a fixed flange, a mobile flange, a slidable composite bearing plate and a cam. The fixed flange is provided with a lower recess and the mobile flange is provided with a recess in registration with and larger than the lower recess of the fixed flange. The slidable bearing plate is formed of two parts bearing together along a straight line and having lower toothings cooperating with a corresponding toothing of the mobile flange, the lower toothing of one of the two parts extending in said corresponding toothing while the lower toothing of another one of the two parts extends only in part in said corresponding toothing.

Abstract: The articulation member comprises asymetrically guided bearing plates. A fixed flange is shaped in order to support, by means of sectors, sliding bearing plates having an upper toothing pitch corresponding to pitch of a toothing of a movable flange. The bearing plates are normally pushed back from the toothing by elastic means and have positions which are angularly shifted for two of them and submitted to bias of control means such as a cam. An angular shift of two of the bearing plates is of 120.degree.-.alpha./3 (=240.degree.-2/3.alpha.) with for complement 120.degree.+2/3.alpha., .alpha.being an angle forming a pitch for each tooth of the toothed ring and teeth of the bearing plates.

Abstract: The rectilinear jack comprises a cage defining an inner chamber at an upper portion while a lower portion of the cage is thinned out in order to form an end lug with a hole for fixation of the cage. The upper portion of the cage is substantially of a lozenge shape for enclosing a cam with two noses placed substantially at 120.degree. with respect to each other. The cam displaces two substantially V-shaped parts bearing on inclined inner walls of the inner chamber while an open lower portion thereof contains trains of rollers kept in engagement with the above parts by a spring. The trains of rollers bear on an upper portion of a jack stem having at least one connection head.

Abstract: Electric safety lock, more specially designed for motor vehicle doors, in which each vehicle door as well as the motor bonnet, the petrol tank cap and the luggage boot of the vehicle are each equipped with a set consisting of a case in which an electric micro-motor is mounted.