| 摘要 |
<p>1. Central door locking system, especially for motor vehicles, with electrical positioning units connected to a parallel circuit, the parallel circuit being connectable to a current source in polarity-changeable manner by a switching unit, and with a timing element of electric motor type for controlling the switching unit which element is connectable to a current source by means of a manually operatable operating switch and of a change-over switch which is connected in series with said operating switch, the change-over switch being adapted to be switched-over after half a positioning cycle by the timing element into a position which interrupts the flow of current and which prepares a triggering of a second half positioning cycle, characterized in that the parallel circuit is connectable to the current source with a lag relatively to the beginning of an energisation of the timing element, and the change-over switch (8) is adapted to switchover with a lead relatively to a following separation of the parallel circuit from the source of current, the timing element being connected to the parallel circuit.</p> |
