Electrically operated door locking system - has transmitter and receiver across door locking bolt accommodating opening

摘要

The door locking arrangement is used in conjunction with locks of operated by electrical signals. The control arrangement has transmitter (101) for electromagnetic radiation arranged on one side of this opening. On the other side of the opening for holding the door locking bolts is a receiver (102) for generating an electrical signal corresponding to the radiation level. The arrangement has a door contact which in case of closed door is in a different state when door is open. This contact system operates the electrical circuit.