Patent ID: 8581135

Claim:
A device associated with a switch or circuit breaker, the device comprising a main branch for the flow of electric current and including a disconnector, a secondary branch for the flow of electric current in parallel with the main branch and including a stationary portion, a movable portion, and a vacuum bottle at the junction between the stationary portion and the movable portion, and the device being arranged in such a manner that the disconnector drives the movable portion during a fraction of a stroke between an open state and a closed state of the device, the device including a mechanism that is movable with the disconnector, and that is arranged in such a manner as to engage with the movable portion of the secondary branch and prevent the movable portion from moving after said fraction of a stroke, the mechanism includes a latch finger that is biased by a spring and that is suitable for being urged against the spring by the disconnector during a first part of a stroke towards switch closure, and in that the movable portion of the secondary branch includes an actuator cam interacting with the latch finger during a second portion of the stroke, the latch finger and the actuator cam presenting mutual slip portions and mutual blocking portions.