| 摘要 |
PURPOSE:To obtain an automatic answering telephone set which functions as the answer-only unit after detection of the disaster occurrence and then receives quickly the telephone call from the place where to make contact to inform the contents of the disaster occurrence. CONSTITUTION:With operation of disaster detection sensor S, flip-flop FF2 is set. And the output of FF2 operates automatic dial device ADC to call out the message receiver for information of the disaster occurrence. At the same time, flip-flop FF1 for constitution of the telephone circuit is also reset by the output of FF2 to secure the release for relay A and then open the telephone circuit. Furthermore, relay C is actuated by the output of FF2, and the switching is given via contact c2 from the side of reproduction head H1-1 to reproduction head H1-2 to make the telephone set function as the answer-only unit for the subsequent incomings. In case the remote control signal of the speficied frequency arrives through the telephone circuit while answring, detector circuit RSD operates to secure the switching to head H1-3 to give information of the disaster occurrence. |
