FIRE ALARM SYSTEM HAVING A DIODE COUPLED CHECKING CIRCUIT MEANS
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Abstract
A FIRE ALARM SYSTEM INCLUDING A PLURALITY OF FIRE ALARMS ARRANGED IN GROUPS. ALARM-SIMULTING CONDITIONS ARE PRODUCED IN EACH FIRE ALARM BY AN ELECTRIC TEST SIGNAL, THE RESPONSE OF EACH FIRE ALARM BEING SENT TO AN EVALUATION DEVICE AT A CENTRAL SIGNAL STATION THROUGH A LOGIC CIRCUIT COUPLING THE FIRE ALARMS TOGETHER.
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