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    • 142. 发明授权
    • Mail delivery signal system
    • 邮件传送信号系统
    • US5440294A
    • 1995-08-08
    • US63643
    • 1993-05-20
    • Ellen L. MercierCarl E. Mercier
    • Ellen L. MercierCarl E. Mercier
    • A47G29/122G08B21/00
    • A47G29/1214
    • A system for remotely sensing the delivery of mail to a mailbox uses a transmitter mounted on the mailbox. The transmitter generates a prescribed signal when the door of the mailbox is opened. The system also uses a receiver adapted for placement at a location remote from the transmitter. The receiver has two receiving circuits. The first receiver circuit generates a mail arrival output in response to receipt of the prescribed signal from the transmitter. The first receiver circuit maintains the generation of the mail arrival output regardless of continued receipt of the prescribed signal, until receipt of a prescribed termination command entered by the user. This way, the user knows when the mailbox door has been opened. The second receiver circuit generates a receiver locator output separate from the mail arrival output in response to receipt of the prescribed signal from the transmitter. Unlike the first receiver circuit, the second receiver circuit automatically terminates the receiver locator output in the absence of receipt of the prescribed signal after a predetermined time period. The temporal receiver locator output indicates when the receiver is placed in the remote location for good reception of the prescribed signal.
    • 用于远程传送邮件到邮箱的系统使用安装在邮箱上的发射器。 当邮箱的门打开时,发射器产生规定的信号。 该系统还使用适于放置在远离发射器的位置的接收器。 接收机有两个接收电路。 第一接收器电路响应于从发送器接收到规定的信号而产生邮件到达输出。 第一接收器电路保持邮件到达输出的生成,而不管继续接收到规定的信号,直到接收到用户输入的规定的终止命令。 这样,用户知道邮箱门何时被打开。 响应于从发射机接收到规定的信号,第二接收器电路产生与邮件到达输出分开的接收器定位器输出。 与第一接收器电路不同,第二接收器电路在预定时间段之后没有接收到规定信号的情况下自动终止接收器定位器输出。 时间接收器定位器输出指示何时将接收器放置在远程位置以良好地接收规定的信号。