| 摘要 |
<p>The control circuit, to be connected between a master switch and an electrical circuit, responds to first and second events. On occurrence of the first event when a first device (13) of the control circuit is non-conductive and the master switch is closed, the first device is made conductive through the agency of second and third devices of the control circuit if and only if the control switch (14) of the control circuit is closed within a predetermined period.</p> |
