公开(公告)号：US3893052A

公开(公告)日：1975-07-01

申请号：US50950574

申请日：1974-09-26

Applicant: GEN ELECTRIC

Inventor： KOTOS PETER ,  KOKOLIS HARRY G

IPC: G08B5/32 ,  H01F7/122 ,  H01F7/16 ,  H01H71/10 ,  H01H71/32 ,  H01F7/08

CPC classification number: H01F7/1615 ,  G08B5/32 ,  H01F7/122 ,  H01H71/1054 ,  H01H71/322

Abstract: In the disclosed indicating device a plunger is normally held in a retracted, non-indicating position by a permanent magnet. An electro-magnet, upon energization, develops a flux opposing the holding flux of the permanent magnet to allow the plunger to be displaced by a spring into its indicating position. The magnetic circuit for most of the holding flux from the permanent magnet comprises a wall of magnetic material containing an aperture through which the plunger extends with a loose fit and through which it moves upon displacement by the spring. For preventing undesired displacement of the plunger out of its retracted position as a result of mechanical shocks and vibrations, there is developed on the plunger in the region where it passes through the aperture a radially-acting magnetomotive force that holds the outer periphery of the plunger in contact with a restricted portion of the internal wall of the aperture.

Abstract translation: 在公开的指示装置中，柱塞通常由永磁体保持在缩回的非指示位置。 电磁体在通电时产生与永磁体的保持磁通相反的磁通，以允许柱塞被弹簧移位到其指示位置。 用于来自永磁体的大部分保持磁通的磁路包括磁性材料壁，该磁性材料壁包含孔，柱塞以松动配合的方式延伸穿过该孔，并且当弹簧移位时，磁路移动。 为了防止由于机械冲击和振动导致柱塞从其缩回位置的不希望的位移，在柱塞上穿过该孔的区域中形成径向作用的磁动势，其保持柱塞的外周 与孔的内壁的限制部分接触。