Multiple signalling annunciator

Claim 1

AN ANNUNCIATOR WHICH COMPRISES, INPUT MEANS FOR CONNECTING THE ANNUNCIATOR TO AN ALARM CIRCUIT WHICH HAS NORMAL AND ABNORMAL CONDITIONS, A MEMORY ELEMENT HAVING A PAIR OF OUTPUT CHANNELS PRODUCING A SIGNAL ON ALTERNATE CHANNELS ONLY FOR EACH CHANGE OF STATE OF THE MEMORY ELEMENT AND THE MEMORY ELEMENT ADAPTED TO CHANGE FROM ONE STATE TO ANOTHER UPON BEING PULSED BY A SIGNAL OF PREDETERMINED POLARITY, BUT CHANGING BACK TO THE FIRST STATE ONLY IF PULSED BY A SIGNAL OF OPPOSITE POLARITY, MEANS BETWEEN THE INPUT MEANS AND THE MEMORY ELEMENT FOR CONVERTING ANY CHANGE OF CONDITION OF THE ALARM CIRCUIT INTO A PULSE OF ONE POLARITY ONLY, FIRST AND SECOND OR ELEMENTS EACH HAVING TWO INPUTS AND ONE OUTPUT, AND AND ELEMENT HAVING BOTH OF THE OR ELEMENT OUTPUTS CONNECTED TO ITS INPUT AND HAVING AN OPTICAL INDICATOR IN ITS OUTPUT ADAPTED TO GIVE AN OPTICAL SIGNAL WHEN ENERGIZED, ONE OF THE TWO OUTPUT CHANNELS WHICH HAS A SIGNAL THEREON FOR NORMAL CONDITION BEING CONNECTED TO AN INPUT OF SAID FIRST OR ELEMENT, THE INPUT MEANS HAVING A CONNECTION WITH THE OTHER INPUT OF SAID FIRST OR ELEMENT AND ADAPTED TO APPLY A SIGNAL CONTINUOUSLY THERETO ONLY WHEN THE ALARM CIRCUIT IS ABNORMAL, THE OTHER OF SAID OUTPUT CHANNELS WHICH HAS NO SIGNAL THEREON FOR NORMAL CONDITION BEING CONNECTED TO ONE OF THE INPUTS OF SAID SECOND OR ELEMENT, A CONTINUOUS SOURCE OF INTERMITTENT SIGNAL CONNECTED TO THE INPUT OF SAID MEMORY SAID SECOND OR ELEMENT, AND AN INDEPENDENT ACKNOWLEDGE PULSE MEANS CONNECTED TO THE INPUT OF SAID MEMORY ELEMENT FOR APPLYING A PULSE OF OPPOSITE POLARITY THERETO TO CHANGE SAID STATE WHEN DESIRED, THE OCCURRENCE OF ABNORMAL CONDITION IN SAID ALARM CIRCUIT CAUSING A CHANGE IN STATE OF THE MEMORY ELEMENT AND PROVIDING AN INTERMITTENT OPTICAL INDICATION IRRESPECTIVE OF WHETHER THE ABNORMAL CONDITION IS MOMENTARY OR CONTINUOUS WHEN SAID OPTICAL SIGNAL BEING CHANGED TO CONTINUOUS, AND SAID MEMORY ELEMENT IS THEREAFTER PULSED BY SAID ACKNOWLEDGMENT PULSE MEANS IF THE ABNORMAL CONDITION REMAINS, OR TO BECOME EXTINGUISHED IN THE EVENT THE ABNORMAL CONDITION WAS MOMENTARY.