H - Electricity – 04 – M
Patent
H - Electricity
04
M
352/72, 379/78
H04M 1/65 (2006.01) H04M 1/652 (2006.01)
Patent
CA 1040769
ABSTRACT OF THE DISCLOSURE A telephone answering system is provided for responding to telephone messages received over a telephone line. The system includes a first magnetic tape mechanism having a recorded announcement thereon which is transmitted over the telephone line during a time interval T1 in response to a telephone call, a switching means coupled to the first magnetic tape mechanism to be activated to a particular state for the duration of the T1 time interval, and a second magnetic tape mechanism for recording messages received over the telephone line during a second time interval T2 following the time interval T1. A tone sensing circuit is included in the system, and is coupled to the telephone line for sensing a tone signal of a predetermined frequency received over the telephone line and for providing an output signal for response thereto. A first control circuit is connected to the switching means and to the tone sensing circuit and responds to the output signal produced during the T1 time interval, and when the switching means is actuated to the particular state for causing the first magnetic tape mechanism to stop and for causing the second magnetic time mechanism to rewind to a reference position. A pulse generator is coupled to the second magnetic tape mechanism for producing pulses during movement of the second magnetic tape mechanism. A second control circuit is coupled to the pulse generator, and it responds to the termination of the pulses from the generator to cause the second magnetic tape mechanism to move forward and to transmit any messages recorded thereon over the telephone line. Finally, a third control circuit is connected to the tone sensing circuit and responds to an output signal from that circuit corresponding to a second tone signal of said predetermined frequency received over the telephone line for stopping the motion of the second magnetic tape mechanism and for restarting the first magnetic tape mechanism so as to cause the first magnetic tape mechanism to complete the T1 time interval.
248771
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