| 摘要 |
PURPOSE:To telerecord a visitor to an absent house through inexpensive constitution by telerecording a video from a television camera as a still picture when there is a call, and telerecording the telerecording picture on another tape only when there is no answer to the call. CONSTITUTION:When the visitor presses a call button 4a, the buzzer of a house device 6A sounds; and the output 18a of an OR gate 18 goes up to H and outputs 23a and 24a of timers 23 and 24 also go up to H. The 1st telerecording device 20 telerecordes a still picture of the visitor through the television camera 2. If there is no answer to the call at the device 6A, the contact 15aA of a relay is left released. Therefore, the output of an OR gate 27 is at L and the timer 24 is not reset, so its output 24a is still at H. When the outut 23a goes up to H a specific time after the output 18a goes up to H, and the output 26a of an AND gate 26 goes up to H and is inputted to the 2nd telerecording device 21. The contents of the device 20 are transferred to the device 21 and the still picture of the visitor is telerecorded by the device 21. |
