| 摘要 |
<p>This control system with a timing characteristic for windscreen wiper of automotive vehicles, which comprises a wiper driving motor and an ON-OFF switch, further includes a control circuit connected to the stop contact of said switch, said control circuit comprising a relay with contact means for energizing the wiper motor, a transistor and a push-button switch, disposed in series, the base circuit of said transistor comprising a capacitor the charging time of which determines the conductive time of said transistor and therefore the energization of the wiper motor as a consequence of the actuation of said push-button switch, said relay comprising a contact adapted to hold the transistor and relay assembly in its energized condition when said relay is energized, and also to discharge said capacitor when said relay resumes its inoperative condition.</p> |
