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Seat - Functional Diagram Figure 007
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(b) Electrical control (Ref. Fig. 007) The three-position switch controls the gear motor connected to a rack and pinion system located under the seat pan. When the seat reaches its limit position, overtorque is detected and the motor power supply is cut off. The detector is integrated in the gear motor. The gear motor assembly locks the seat on the rack.
(3)
Backrest adjustment (Ref. Fig. 006) The position of the backrest can be adjusted from 7 deg. to 34 deg. with respect to the vertical by pulling the control handle marked R, located on the pedestal side of the seat. The lever acts on two locks by means of a control and 2 cables. A gas cylinder damps the backwards movement of the backrest and acts as return spring when the backrest is raised to the 7 deg. position.
(4)
Lumbar rest adjustment (Ref. Fig. 006) Two coaxial knobs, located on the pedestal side of the backrest enable the lumbar rest adjustment in the vertical and horizontal directions. The round serrated control knob ensures the vertical lumbar rest adjustment by means of a rack and pinion system. The triangular knob ensures the depth adjustment of the lumbar rest by means of a cam-mounted rack and pinion assembly.
(5)
Armrest adjustment (Ref. Fig. 006)
(a)
Inboard armrest The inboard armrest (pedestal side) can be raised vertically and stowed behind the backrest. A knob located on the front of the armrest ensures height adjustment by means of a screw-nut system and associated stop (continuous adjustment from 15 deg. downwards to 10 deg. upwards).
(b)
Side stick armrest (Ref. Fig. 008) The side stick armrest is composed of three main sections. These are the fixed arm, the carrier arm and the side stick table. The fixed arm supports the carrier arm and side stick table assembly and is attached to the seat pan.
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Side stick Armrest Figure 008
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The carrier arm, by a rotation of 18 deg. max. upwards, with respect to the horizontal, around a hinge pin, located on the fixed arm, enables height adjustment of the side stick table. The movement is given by a knob located on the outboard side of the armrest. This knob transfers the rotary movement to a screw-nut system. The nut is connected to a link and 2 rollers which transform the translation movement of the nut into a rotary movement of the carrier arm around the fixed arm. The tilt angle of the armrest table can be adjusted. A knob located on the front of the armrest enables this adjustment. The principle of the adjustment mechanism is the same as the one described above except that the rotation hinge pin is located on the carrier arm. Adjustment is up to 30 deg. downwards with respect to the horizontal. A position indicator including two scales is integrated in the table. The scale on the seat side shows the tilt angle adjustment of the table. The scale on the outboard side shows the table height. A wheel, located on the front of the table, serves to avoid interference between the armrest and the lateral console when the seat is moved forwards with the table fully inclined.
(6) Safety harness (Ref. Fig. 009) The straps can be clicked into the buckle in any order. Turning the unlocking control through a 1/4 turn, either clockwise or counterclockwise, releases the two shoulder straps and the lap belt. Pressing the control located on the top of the buckle releases the shoulder straps alone. A control lever, located on the pedestal side of the seat backrest, serves to lock the inertia reel. To lock the mechanism the lever must be in the down position. To unlock the mechanism the lever must be in the up position.
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