公开(公告)号：DE3323861A1

公开(公告)日：1985-01-03

申请号：DE3323861

申请日：1983-06-29

Applicant: SIEMENS AG

Inventor： VOLKMAR RALF-REINER DIPL ING

IPC: H01H33/66 ,  F16F1/04 ,  F16F1/12 ,  H01H33/666 ,  H01H50/34 ,  H01J21/08

Abstract: An adjusting device for the pretensioning force of a spring has an adjusting piece (30) with two pairs of projections (31, 32), which are arranged diametrically opposite one another and extend in the direction of the spring force, and whose length is different. The adjusting piece (30) can rotate with respect to a latching piece (40) which has a sequence of recesses or indentations (41, 42, 43, 44) which are of different depth and are used for holding the projections (31, 32). The projections and the recesses are dimensioned in such a manner and are arranged in such a distribution that a symmetrical and central transmission of the spring force is ensured in all relative positions of the adjusting piece and of the latching piece. The described adjusting device is generally suitable for mechanical and electrical apparatuses, and is explained in conjunction with a vacuum contactor.