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    • 8. 发明授权
    • Electronic key and receptacle therefor
    • 电子钥匙及插座
    • US4871886A
    • 1989-10-03
    • US061372
    • 1987-06-15
    • John E. VaughanDavid R. SmaleBernard PatryJohn C. Heaton
    • John E. VaughanDavid R. SmaleBernard PatryJohn C. Heaton
    • G07C9/00G07F7/00G07F7/08G07F15/00
    • G06Q20/127G06Q20/3433G07C9/00944G07F15/003G07F17/0014G07F7/02G07F7/0866
    • An electronic token for use with a prepayment commodity meter such as an electricity meter comprises a key-like device 10 having a head 12 containing an electronic circuit and a body portion 14 for insertion into a keyway in a receptable 40 in the meter. The body portion 14 has grooves 24 which serve to guide the body portion into the keyway, and which contain electrical contacts 28, 30 connected within the device 10 to the electronic circuit. Between the body portion 14 and the head 12, the device 10 is provided with a locating recess 27, which engages a projection 78 in the receptacle 40 when the body portion is fully inserted into the keyway. The receptacle 40 incorporates a combined shutter 98 and spring 102, which serve to close the keyway in the absence of the device 10, and to urge the body portion 12 to one side of the keyway during insertion, such that the recess 27 engages the projection 78 and the contacts 28, 30 engage contacts 68, 72 in the receptacle.
    • 与诸如电表之类的预付费商品计量表一起使用的电子令牌包括具有包含电子电路的头部12的键状装置10和用于插入仪表中的可接收的40中的键槽中的主体部分14。 主体部分14具有凹槽24,其用于将主体部分引导到键槽中,并且包含连接在装置10内的电触点28,30与电子电路。 在主体部分14和头部12之间,装置10设置有定位凹槽27,当主体部分完全插入键槽时,定位凹槽27与插座40中的突起78接合。 插座40包括组合的快门98和弹簧102,其用于在不存在装置10的情况下关闭键槽,并且在插入期间将主体部分12推动到键槽的一侧,使得凹部27接合突起 78和触头28,30接合插座中的接触件68,72。