| 摘要 |
The vehicle driver uses a perforated card, to be entered in a reading box (2), connected to a logic decoding and control system (3). This system is connected to one or more electromagnetic output relays (7) and to the protective locking of the bonnet motor (9). The perforated card (1) may be metal or plastic, pierced with holes, in two or more rows.The hole diameter may be less than 3 mm. An electro optical light source, or a number of light emitting diodes, corresponding to the maximum number of holes in the card, may be connected by plastic optical cables (4), grouped in a single cable. Alternatively, a pneumatic piping system (6) may be used, with actuating cylinders.
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