Intercepting trunk circuit

Claim 1

AN INTERCEPTING TRUNK CIRCUIT FOR CONNECTING THE TIP AND RING CONDUTORS IN A TELEPHONE LINE TO AN ANNOUNCEMENT MACHINE COMPRISING FIRST AND SECOND CONDUCTORS HAVING FIRST AND SECOND NORMALLY OPEN CONTACTS CONNECTING SAID TIP AND RING CONDUCTORS TO SAID MACHINE, FIRST AMPLIFYING MEANS CONNECTED TO SAID SECOND CONDUCTOR BEING INITIALLY OPERATIVE IN RESPONSE ONLY TO ALTERNATING SIGNALS APPEARING IN SAID SECOND CONDUCTOR, SECOND AMPLIFYING MEANS CONNECTED TO SAID FIRST CONDUCTOR, RELAY MEANS CONNECTED TO SAID FIRST AND SECOND AMPLIFYING MEANS RESPONSIVE TO THE OPERATION OF EITHE SAID FIRST OR SECOND AMPLIFYING MEANS, BREAKDOWN MEANS CONNECTED ACROSS SAID FIRST AND SECOND CONDUCTORS FOR BREADING DOWN IN RESPONSE TO THE ENERGIZATION OF SAID REALY MEANS BY ALTRNATING SIGNALS APPEARING IN SAID SECOND CONDUCTOR TO PRESENT A LOW IMPEDANCE TO SIGNALS APPEARING IN SAID FIRST AND SECOND CONDUCTORS, MEANS OPERTIVE IN RESPONSE TO THE ENERGIZATION OF SAID RELAY MEANS BY SAID ALTERNATING SIGNALS FOR CONTROLLING SAID FIRST AMPLIFYING MEEANS TO BE RESPONSIVE TO DIRECT CURRENT SIGNALS APPEARING IN SAID SECOND CONDUCTOR, AND MEANS RESPONSIVE TO THE ENERGIZATION OF SAID RELAY MEANS FOR CLOSING SAID FIRST AND SECOND NORMALLY OPEN CONTACTS AT A PREDETERMINED TIME AFTER THE ENERGIZATION OF SAID RELAY MEANS.