Abstract: The invention relates to a method for enzyme cleavage of polysaccharides comprising a first sequence [?4)-?-D-GlcpA-(1?4)-?-L-Rhap3 sulphate-(1?]n and a second sequence [?4)-?-L-IdopA-(1?4)-?-L-Rhap3 sulphate-(1?]m, the first and second sequences respectively comprising two monosaccharide units connected by an osidic bond, wherein said method is such that: said polysaccharide sequences are provided; a microorganism capable of producing an enzyme substance of the lyase class is provided; and said enzyme substance is brought into contact with said polysaccharide sequences in such a way as to bring about cleavage of the osidic bond according to a ?-elimination reaction. The invention is characterized in that a microorganism belonging to the bacteria of the Ochrobactrum genus is chosen for producing said enzyme substance.

Abstract: The invention relates to a method for enzyme cleavage of polysaccharides comprising a first sequence [?4)-?-D-GlcpA-(1?4)-?-L-Rhap3 sulphate-(1?]n and a second sequence [?4)-?-L-IdopA-(1?4)-?-L-Rhap3 sulphate-(1?]m, the first and second sequences respectively comprising two monosaccharide units connected by an osidic bond, wherein said method is such that: said polysaccharide sequences are provided; a microorganism capable of producing an enzyme substance of the lyase class is provided; and said enzyme substance is brought into contact with said polysaccharide sequences in such a way as to bring about cleavage of the osidic bond according to a ?-elimination reaction. The invention is characterised in that a microorganism belonging to the bacteria of the Ochrobactrum genus is chosen for producing said enzyme substance.

Abstract: A motor vehicle seat has a strength-member for its back that includes an upper portion pivotally mounted on a lower portion and carrying a headrest, the two portions of the strength-member are connected together by a locking device which holds them together and which is dimensioned to give way when the back of a passenger bears against a thrust member of the upper portion of the strength-member in the event of an impact from behind, such that the upper portion of the seat-back strength-member and the upper region of the front face of the seat-back then pivot forwards together with the headrest, with this movement being braked by an energy absorber device.

Abstract: The vehicle seat has a seat back that is extended upwards by a headrest. The headrest is supported by at least one rigid stalk that is vertically slidable in a socket secured to the seat back, with a certain amount of clearance for forward pivoting. The stalk is urged angularly rearwards by a spring towards a rest position in which notches formed in the rear face of the stalk co-operate with a stop member secured to the socket. Starting from this rest position, the headrest can be moved angularly forwards by a user into an adjustment position where the stalk is free to slide vertically in the socket.

Abstract: A front seat for a motor vehicle is disclosed, characterized in that its sitting portion has a front part (16) and a rear part (15) mounted for sliding horizontally one on the other in the longitudinal direction of the seat and an adjustment mechanism actuatable by a single control member (29) and adapted for modifying both the longitudinal position of the front part, the longitudinal position of the rear part and the level of this rear part, so that any backward movement of the front part corresponds to lengthening of the sitting portion (17) and lowering of its rear part, and conversely. Furthermore, any lengthening of the sitting portion preferably results in raising the top portion (4) of the seat-back and conversely.

Abstract: The invention relates to improvements to devices for attaching seat backs on corresponding sitting portions. To assemble a vehicle seat back on a corresponding sitting portion, the seat back comprises two trapezoidal flat cases (1), each containing a bent wire spring (8) whose ends (8.sub.1) are urged towards each other, these ends passing through two horizontal slots formed in the cases. The sitting portion comprises two trapezoidal wedges (2) complementary to the cases. The oblique edges of the wedges are formed with inclined slots (12, 13) through which the ends of the spring also pass.

Abstract: This device and method for testing a combinative logic circuit (4), includes on the one hand a circuit generating test sequences (30) for applying test logic signals to N inputs of the combinative logic circuit and, on the other hand, an output circuit (5) to analyze the output signals of the combinative logic circuit. These test sequences are successively applied to each of the N inputs (E1, E2, E3 and E4) so that an alternating series, at least twice, of logic "1"'s and of logic "0"'s while a word of N-1 bits is applied to the other inputs to ensure the transmission of the said alternating series to the output of the combinative logic circuit.

Abstract: The invention provides a seat-back hinge for a vehicle seat comprising an inwardly toothed sector integral with the sitting portion flange (1), an inwardly toothed sector integral with the seat-back flange (3), a toothed bolt (5) adapted to coact directly with these two sectors and a rotary cam (6) connected to a control hand-lever (22) and adapted to coact with the bolt. This bolt and this cam are mounted transversely floating and the cam comprises a semi-cylindrical land (11) adapted to coact directly with two complementary lands comprised by the two flanges.

Abstract: For adjusting the height and inclination of the sitting portion of a seat with respect to the base of this seat, two mechanisms are provided placed respectively between these two sub-assemblies, at the front and at the rear of the seat.Each mechanism comprises, on each side of the seat, two horizontal bearing surfaces integral with the base, a horizontal shaft connected vertically to the sitting portion and pivotably mounted thereon, two flat Archimedes-spiral cams in opposite directions integral with the shaft and placed jointingly between the bearing surfaces, and electric means for causing said shaft to rotate, these means allowing the shaft of the front mechanism, that of the rear mechanism or both at the same time to be rotated at will.

Abstract: The invention concerns a vehicle seat slide comprising a lower channel section integral with the floor of the vehicle, an upper channel section integral with the sitting portion of the seat, intermediate balls and a locking mechanism comprising a toothed bolt mounted on the upper channel section adapted to coact with a series of catches in the lower channel section.There is provided on one of the channel sections a series of vertical teeth and on the other a series of closed apertures disposed vertically opposite the teeth so that the beginning of a vertical dislocation of the slide results in the teeth catching in the apertures.

Abstract: The invention concerns a seat hinge comprising a first flange integral with the sitting portion carrying a first toothed sector having axis A, a second flange integral with the seat back carrying a second toothed sector having axis B adapted to coact vertically with the first sector and a handle-rotary cam-bearing surface assembly for controlling the vertical movements of the flange. The first flange carries a third toothed sector having axis A diametrically opposed to the first sector and open likewise upwards, and the second flange carries another toothed sector having axis B diametrically opposed to the second sector, likewise open downwards, and adapted to coact with the third sector at the same time as the second sector coacts with the first sector. Preferred application: front vehicle seats.