Movement of the controlling lever operates an electrical circuit controller.
2.
Alister eventually manages to reach the chamber and pulls the time-controlling lever backwards despite the efforts of Sigmund to stop him.
3.
For lower quadrant semaphores this requires the spectacle case to be sufficiently heavy to ensure the arm rises rather than falls; this is one of the reasons for the widespread switch to upper quadrant signals . ( The purpose of the balance weight often found on a lever lower down the post of a semaphore signal is actually to ensure the signal " wire " returns to its normal position when the controlling lever is put back.
मोबाइल