| 摘要 |
A pull-cord control device is described, of the type normally used in an electrical system to activate signalling means, wherein the pull-cord control device is controlled by means of a cord (2) and of a knob (1) placed at the end of the cord. <??>To adjust the length of the cord (2) without having to cut it - allowing the pull-cord control device to be re-used - the cord (2) is wound on a spool (3) belonging to the knob (2) (or which forms the knob) and is unwound for the length needed each time for the specific use. <IMAGE> |
