| 摘要 |
PURPOSE:To enable to transmit the callout signal to the possessor of pocket bell only, by providing two types of information means different in the output and operation as the receiving information unit. CONSTITUTION:When the callout signal is intermittently output from the detection circuit 1e, the signal in about 1,000Hz is intermittently produced with the low frequency oscillator 2, it is amplified at the output amplifier 3 and output to the line 5. In this case, the switch 14 is kept open and the speaker 4 is inoperative. On the otherhand, the switch 7 is closed, the motor 6 is turned and vibration is produced to the case with the unbalance weight 11, and the callout signal is delivered to the possessor. If the possenssor is unaware of the vibration of pocket bell within the time set by the timer 15, the timer 15 is operated to invert the switches 7, 14. Thus, the rotation of the motor 16 stops and sound is made from the speaker 4 at the same time to alarm the possessor. |
