Abstract: A support tube adapted to carry a motor-vehicle accessory and to slide in a bearing tube provided with a latch element is hollow, cylindrical, centered on an axis, and formed with a plurality of outwardly open notches. These notches are each in turned formed by a flat latch face extending generally perpendicular to the axis, an outwardly open indent adjacent the latch face, a cam face extending from the latch radially outward to an outer surface of the tube, and a flat base face extending generally parallel to the axis from an inner edge of the latch face to an inner edge of the cam face.

Abstract: A support tube adapted to carry a motor-vehicle accessory and to slide in a bearing tube provided with a latch element is hollow, cylindrical, centered on an axis, and formed with a plurality of outwardly open notches. These notches are each in turned formed by a flat latch face extending generally perpendicular to the axis, an outwardly open indent adjacent the latch face, a cam face extending from the latch radially outward to an outer surface of the tube, and a flat base face extending generally parallel to the axis from an inner edge of the latch face to an inner edge of the cam face.

Abstract: A motor-vehicle seat having a frame covered by upholstery is provided with a headrest having a cushion, a vertical support rod having an upper portion carrying the cushion and a lower portion, and a socket in which the lower rod portion is seated. The socket is formed with a relatively slim stem seated in the frame, an upper head bearing downward on the seat upholstery and spaced above the frame, and a relatively thick body between the stem and the head.