| 摘要 |
It comprises a rod 16 capable of sliding with respect to a tubular guide 13 fastened to the cover 9 of the casing 1 in which are mounted the fixed contacts 3-3', on which rod is slipped an insulating sleeve 19 which insulates it from a fixed bridge piece 17, with the possibility of rotating and carrying out certain movements, at the end thereof, there being rolled up on this sleeve a helical spring 23 which acts on said piece and a further helical spring 26 being rolled up on the rod, acting on the rod itself, and the end of the tubular guide 13 being able to allow the engagement of the end of an independent grip 27 which has two diametrically opposed dowels 29-29' capable of sliding along helical grooves 30-30' provided in the guide. <IMAGE> |
