Fibre optic device for monitoring the operation of fuse cartridges

摘要

With the usual striker 8 of the cartridge 1 there is associated a movable screen 14 drilled with an opening 14a allowing passage of the light beam between the adjacent ends of two optical fibres 17, 18; the displacing of this screen 14 under the effect of the freeing of the striker causes the breaking of the beam and the automatic emission of an alarm.