Supervisory apparatus

Claim 1

A COMMUNICATION SYSTEM FOR COMMUNICATING THE CONDITION OF APPARATUS, SAID APPARATUS BEING NORMALLY IN A FIRST CONDITION BUT BEING CAPABLE OF BEING IN A SECOND CONDITION AND OF BEING CONVERTED FROM SAID SECOND CONDITION TO SAID FIRST CONDITION, THE SAID SYSTEM COMPRISING A PLURALITY OF DETECTORS CONNECTED TO SAID APPARATUS ACTUABLE ON THE OCCURRENCE OF A TRANSISTION FROM SAID FIRST CONDITION TO SAID SECOND CONDITION AND BEING RESET ON THE RESTORING OF SAID APPARATUS FROM THE SECOND CONDITION TO THE FIRST CONDITION, A TRANSMITTING STATION AND A RECEIVING STATION, MEANS RESPONSIVE TO ACTUATION OF A DETECTOR ON THE TRANSITION OF SAID APPARATUS TO SAID SECOND CONDITION FOR ACTUATING SAID TRANSMITTING STATION TO TRANSMIT A FIRST SIGNAL TO SAID RECEIVING STATION, MEANS RESPONSIVE TO THE RESETTING OF SAID ACTUATED DETECTOR ON THE RESTORATION THEREAFTER OF SAID APPARATUS FROM SAID SECOND CONDITION TO SAID FIRST CONDITION FOR ACTUATING SAID TRANSMITTING STATION TO TRANSMIT A SECOND SIGNAL TO SAID RECEIVING STATION, A FIRST SENSORY INDICATOR AND A SECOND SENSORY INDICATOR CORRESPONDING TO EACH DETECTOR, MEANS RESPONSIVE TO SAID FIRST SIGNAL FOR ACTUATING THE FIRST SENSORY INDICATOR CORRESPONDING TO THE ACTUATED DETECTOR TO PRODUCE AT SAID RECEIVING STATION, A FIRST SENSORY INDICATION OF SAID SECOND CONDITION OF SAID APPARATUS TO THE EXTENT THAT SAID SECOND CONDITION IS DETECTED BY SAID ACTUATED DETECTOR, AND MEANS RESPONSIVE TO SAID FIRST SIGNAL AND TO SAID SECOND SIGNAL FOR ACTUATING SAID SECOND SENSORY INDICATOR CORRESPONDING TO THE ACTUATED DETECTOR, TO PRODUCE A SECOND SEPARATE SENSORY INDICATION OF THE TRANSITION OF SAID APPARATUS RESPECTIVELY FROM SAID FIRST CONDITION TO SAID SECOND CONDITION TO THE EXTENT ONLY THAT THE SECOND CONDITION IS DETECTED BY THE ACTUATED DETECTOR AND FROM SAID SECOND CONDITION TO SAID FIRST CONDITION TO THE EXTENT ONLY THAT THE FIRST CONDITION IS DETECTED BY THE RESETTING OF THE ACTUATED DETECTOR, SAID SECOND SENSORY INDICATION BEING SEPARATELY IDENTIFIABLE FROM SAID FIRST INDICATION AS AN INDICATION OF SAID TRANSITIONS AND NOT AS AN INDICATION OF THE EXISTENCE OF A SAID CONDITION.