Automatic answering, recording and reproducing machine

Claim 1

AN AUTOMATIC ANSWERING, RECORDING AND REPRODUCING MACHINE FOR A TELECOMMUNICATIONS SYSTEM INCLUDING DETECTOR MEANS RESPONSIVE TO SIGNALS IN A SIGNAL CHANNEL, RECORDING AND REPRODUCING APPARATUS, AND SWITCHING MEANS RESPONSIVE TO THE OUTPUT FROM THE DETECTOR MEANS SERVING TO CONNECT THE RECORDING AND REPRODUCING APPARATUS TO THE SIGNAL CHANNEL, THE DETECTOR MEANS COMPRISING TWO RECTIFIER CIRCUITS, AN OUTPUT LOAD INCLUDING A RESERVOIR CONDENSER CONNECTED ACROSS EACH RECTIFIER CIRCUIT, MEANS INCLUDED IN ONE OF THE LOADS TO PROVIDE ITS CONDENSER WITH A FAST CHARGE/SLOW DISCHARGE CHARACTERISTIC, AND MEANS INCLUDED IN THE OTHER LOAD TO PROVIDE ITS CONDENSER WITH A SLOW CHARGE/FAST DISCHARGE CHARACTERISTIC, THE OUTPUTS OF THE TWO RECTIFIER CIRCUITS BEING CONNECTED IN POLARITYOPPOSITION TO ALLOW THE CHARGE ACROSS THE SLOW CHARGE CONDENSER TO SUBTRACT FROM THE CHARGE ACROSS THE FAST CHARGE CONDENSER WITH THE RESULT THAT WITH THE APPEARANCE OF A SYLLABIC SIGNAL IN THE SIGNAL CHANNEL THE OUTPUT OF THE DETECTOR IS SUBSTANTIALLY EQUAL TO THE POTENTIAL ACROSS THE LOAD HAVING THE FAST CHARGE CONDENSER SINCE THERE IS INSUF-