Remote telephone extension system

Claim 1

APPARATUS ADAPTED TO PICK UP THE INCOMING RINGING AND VOICE SIGNALS FROM A CALLED TELEPHONE AND TO TRANSMIT TO THE CALLING TELEPHONE THE ANSWERING VOICE SIGNAL FROM A REMOTELY LOCATED PORTABLE RADIO-FREQUENCY ANSWERING STATION, SAID APPARATUS COMPRISING: (A) A PORTABLE RADIO-FREQUENCY ANSWERING STATION INCLUDING A FIRST RECEIVER AND A FIRST TRANSMITTER; (B) A FIXED RADIO-FREQUENCY STATION ASSOCIATED WITH SAID TELEPHONE, INCLUDING A SECOND TRANSMITTER PROVIDED TO TRANSMIT AND INCOMING RINGING AND VOICE SIGNALS FOR RECEPTION BY SAID FIRST RECEIVER AND A SECOND RECEIVER FOR RECEIVING AND SUPPLYING TO AN OUTPUT LINE THE ANSWERING VOICE SIGNALS TRANSMITTED BY SAID FIRST TRANSMITTER; (C) FIRST CIRCUIT MEANS RESPONSIVE TO THE ANSWERING VOICE SIGNAL FROM SAID SECOND RECEIVER PROVIDED TO OPERATIVELY PLACE A RESISTIVE TERMINATION ACROSS THE CALLED TELEPHONE LINE AND TO ELECTRICALLY COUPLE SAID OUTPUT LINE THERETO; AND (D) TIMER CIRCUIT MEANS RESPONSIVE TO SAID INCOMING VOICE SIGNALS AND SAID ANSWERING VOICE SIGNALS FOR REMOVING THE RESISTIVE TERMINATION FROM THE CALLED TELEPHONE LINE AND FOR UNCOUPLING FROM SAID LINE THE OUTPUT LINE FOR SUPPLYING THE ANSWERING VOICE SIGNALS FROM SAID SECOND RECEIVER AFTER A PREDETERMINED INTERVAL OF TIME HAS ELAPSED FOLLOWING THE CESSATION OF SAID INCOMING AND ANSWERING VOICE SIGNALS.