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    • 3. 发明申请
    • PROGRAMMABLE DOORBELL CONTROL
    • 可编程门控制
    • WO1991004551A1
    • 1991-04-04
    • PCT/US1989004111
    • 1989-09-19
    • HOUSLEY, Todd, B.
    • G08B07/00
    • G08B3/10G08B7/06
    • A programmable doorbell system (10) includes a battery-powered doorbell control (12) for connection in series with an existing doorbell pushbutton in a residential doorbell circuit. In a first embodiment, the doorbell control has a visual LCD (18) display which can display one of a plurality of messages. By utilizing an internal time-of day clock (52), the residence occupant can program the control (34) for a time interval during which the normal doorbell (50) is disconnected from the doorbell switch. During this time interval, the doorbell control (12) sounds a tone alarm and displays the selected message if the doorbell switch is pressed by a visitor. A second embodiment is disclosed which utilizes a digital record/playback circuit (550) to record an audible announcement by the occupant and store the recorded announcement as digital signals. An audible announcement is generated from the stored digital signals when the doorbell pushbutton is pressed by a visitor.
    • 可编程门铃系统(10)包括电池供电的门铃控制(12),用于与住宅门铃电路中的现有门铃按钮串联连接。 在第一实施例中,门铃控制具有可显示多个消息之一的可视LCD(18)显示器。 通过利用内部时钟(52),居住者可以在通常门铃(50)与门铃开关断开的时间间隔内编程控制(34)。 在该时间间隔期间,如果门铃按钮被访问者按下,则门铃控制(12)发出音调报警并显示所选择的消息。 公开了一种利用数字记录/回放电路(550)来记录乘客的可听见通知并将所记录的通告存储为数字信号的第二实施例。 当门铃按钮被访问者按下时,从存储的数字信号产生可听见的通知。