| 摘要 |
<p>An electronic signalling device which signals that the ignition key of a motor vehicle has inadvertently been left in a steering lock ignition switch when a door is opened comprises a visual and/or acoustic warning apparatus (34) controlled by a first switch associated with the ignition switch and comprising a static electrical contact (24-29) and a movable element (22) and by a second switch (35) associated with the door. The first switch and a resistance (31) are connected to a transistor via a diode (32), the collector (33) of the transistor being connected to the vehicle battery and the emitter (33a) being connected to earth via the visual and/or acoustic warning apparatus (34) and said second switch (35). <IMAGE></p> |
