| 摘要 |
A fibre optic switching system, especially for the control of the ignition of motor vehicles, comprises a key pad (10) located in the vehicle cabin, a light source controlled by operation of the key pad, a fibre optic cable (12) to carry light signals to a control box (14), for example in the engine compartment, and switches in the control box which respond to the light signals to control the vehicle ignition. A key could replace the keypad. <IMAGE>
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