Patent ID: 8039768

Claim:
A switch comprising: a rotary switch actuator device, operated from an operating handle, an actuator locking device, which substantially inhibits the rotary switch actuator device to change position when the actuator locking device is in its locked condition, a switch contact pair comprising a movable contact and a respective opposite contact for mutual contact, the movable contact being connected to the rotary switch actuator device, and a lock release device, acting on the actuator locking device, the movable contact is operated from the rotary switch actuator device via an intermediate mechanical connection, the movable contact provides mechanical feedback to the lock release device, the actuator locking device is automatically locked when the switch is activated, the actuator locking device is released by the lock release device, the rotary switch actuator device comprises a recess, the actuator locking device comprises a locking element, the locking element is moved into the recess to lock the actuator locking device and thus substantially inhibits the rotary switch actuator device to rotate, the recess of the rotary switch actuator device is a half-circular recess, and the locking element of the actuator locking device comprises a shaft with a half-circular section, the half-circular section of the actuator locking shaft is turned into the half-circular recess to lock the actuator locking device and thus substantially inhibits the rotary switch actuator device to rotate.