| 摘要 |
PURPOSE: To provide a calling device in which even plural objects to be noticed in existence are recognized individually and called. CONSTITUTION: A telephone set 11 and a call bell 12 are connected to a transmitter 15 by cables 13, 14 and when any of them reaches a calling state, the transmitter 15 sends a signal representing the calling class. Upon the receipt of the signal, a receiver 18 is vibrated at a vibration frequency specific to the class. A carrying person of the receiver 18 recognizes the calling object depending on the frequency. The carrying person of the receiver 18 changes the frequency or revises the amplitude of the vibration.
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