Fire-intrusion automatic telephone dial alarm device

Claim 1

A DUAL ALARM SYSTEM FOR USE WITH A DIAL TELEPHONE CIRCUIT INCLUDING: MEANS FOR COUPLING TO A SOURCE OF A.C. POWER; MEANS FOR COUPLING TO A SOURCE OF D.C. POWER; A MAGNETIC REPRODUCING UNIT FOR ALTERNATIVELY READING A SELECTED ONE OF AT LEAST TWO MESSAGES PRE-RECORDED ON A DUAL CHANNEL RECORDING TAPE, EACH OF SAID MESSAGES INCLUDING MANIFESTATIONS OF A TELEPHONE NUMBER TO BE DIALED, SAID REPRODUCING UNIT INCLUDING A TAPE DRIVE MOTOR AND FIRST AND SECOND ALTERNATIVELY OPERABLE TRANSDUCERS, EACH OF SAID TRANSDUCERS ASSOCIATED WITH A RESPECTIVE ONE OF SAID DUAL CHANNELS; A FIRST SENSING CIRCUIT INCLUDING AT LEAST A FIRST SENSOR FOR DETECTING A FIRST ABNORMAL CONDITION, A FIRST RELAY COUPLED INTERMEDIATE SAID FIRST SENSOR AND SAID MEANS FOR COUPLING TO A SOURCE OF D.C. POWER FOR ACTIVATING SAID FIRST RELAY WHEN SAID FIRST SENSOR DETECTS SAID FIRST ABNORMAL CONDITIONS; A SECOND SENSING CIRCUIT INCLUDING AT LEAST A SECOND SENSOR FOR DETECTING A SECOND ABNORMAL CONDITION, A SECOND RELAY COUPLED INTERMEDIATE SAID SECOND SENSOR AND SAID MEANS FOR COUPLING TO A SOURCE OF D.C. POWER FOR ACTIVATING SAID SECOND RELAY WHEN SAID SENSOR DETECTS SAID SECOND ABNORMAL CONDITIONS; CIRCUIT MEANS COUPLIED INTERMEDIATE SAID FIRST AND SECOND RELAYS FOR ACTIVATING SAID SECOND RELAY WHEN SAID FIRST RELAY IS ACTIVATED, SAID CIRCUIT MEANS INCLUDING INHIBITING MEANS FOR MAINTAINING SAID FIRST RELAY INACTIVE WHEN SAID SECOND RELAY IS ACTIVATED; A PULSING CIRCUIT FOR COUPLING TO A TELEPHONE LINE FOR PROVIDING A SERIES OF PULSES AT INTERVALS CORRESPONDING TO THOSE PRODUCED BY A TELEPHONE DIAL AND INDICATIVE OF SAID TELEPHONE NUMBERS TO BE DIALED, SAID PULSING CIRCUIT INCLUDING MEANS FOR MAKING AND BREAKING THE TELEPHONE CIRCUIT; A FIRST TRANSDUCER SELECTION CIRCUIT COUPLED TO SAID FIRST TRANSDUCER AND TO SAID PULSING CIRCUIT, INCLUDING A FIRST NORMALLY OPEN SWITCH ACTIVATED BY SAID FIRST RELAY FOR PROVIDING SIGNALS TO SAID PULSING CIRCUIT FOR DIALING A FIRST NUMBER INDICATIVE OF SAID FIRST ABNORMAL CONDITION; A MOTOR ACTIVATING CIRCUIT COUPLED TO SAID TAPE DRIVE MOTOR AND SAID MEANS FOR COUPLING TO A SOURCE OF A.C. POWER, INCLUDING A FIRST NORMALLY OPEN SWITCH ACTIVATED BY SAID SECOND RELAY FOR PROVIDING SAID POWER TO SAID TAPE DRIVE MOTOR; MEANS FOR RECEIVING A REFERENCE POTENTIAL; A LATCHING CIRCUIT COUPLED TO SAID SECOND RELAY AND SAID MEANS FOR RECEIVING A REFERENCE POTENTIAL AND INCLUDING A FIRST NORMALLY OPEN SWITCH ACTUATED BY SAID SECOND RELAY, SAID LATCHING CIRCUIT FOR MAINTAINING SAID SECOND RELAY IN THE ACTIVATED STATE; AND A SECOND TRANSDUCER SELECTION CIRCUIT COUPLED TO SAID SECOND TRANSDUCER AND SAID PULSING CIRCUIT INCLUDING A FIRST NORMALLY CLOSED SWITCH ACTUATABLE BY SAID FIRST RELAY, AND OPERATIVE WHEN SAID FIRST RELAY IS INHIBITED BY SAID INHIBITING MEANS FROM BECOMING ACTIVATED FOR PROVIDING SIGNALS TO SAID PULSING CIRCUIT FROM SAID SECOND TRANSDUCER FOR DIALING SAID SECOND NUMBER INDICATIVE OF SAID SECOND SENSED ABNORMAL CONDITION.