Abstract: A deformable, polypropylene-moulding lining (11), is provided in a head rest. It has a crosspiece (12), clipped (14) to the head support (5) and right and left deformable wings (15, 16). These are longer than the support wings (5, 6) of the head part (4), extending past distal edges (17) of the support wings. The deformable wings are spaced inwards from the support wings, with voids (18) defined between them. The deformable wings are divided into two in their forwards extent by a living hinge (19) into a front portion (20) and a rear portion (21). The living hinge is positioned just inside the distal edges of the shell wings. The injection moulded lining has its own foam materiel lining (22), the whole being covered with upholstery (23). The result of the arrangement is that if an occupant's head H impacts the lining in side impact of the vehicle equipped with the seat, the relevant lining wing will be pressed against the shell wing.

Abstract: A tension detector has a flexible strap (350) having its end stitched into a loop (352) that wraps round a central shaft (354). A U-shaped one-piece coil spring has two coiled end portions (356) and (358) wrapped round the shaft (354). The end portions (356) and (358) are inter-connected by a central stirrup (360). A tether strap (316) has a loop (362) sewn into its end which engages round the stirrup (360). The ends of the shaft (354) are journalled in side walls of a housing (366). Each side wall has an inwardly direct abutment projection (368). The upper surface of the housing (366) includes a window (370) through which an arcuate indicator (372) is visible. The indicator (372) has side legs (374) and (376) that are slidably mounted on the stirrup (360). When the strap (316) is relaxed, the left hand end of the arcuate indicator (372) is visible through the window (370). When the strap (316) is tightened, the arcuate indicator (372) pivots to the position shown in FIG.