Data compaction method for microprocessor cards
    1.
    发明授权
    Data compaction method for microprocessor cards 失效
    微处理器卡的数据压缩方法

    公开(公告)号:US4774500A

    公开(公告)日:1988-09-27

    申请号:US111981

    申请日:1987-10-21

    申请人: Ronald D. Lichty

    发明人: Ronald D. Lichty

    摘要: A data compaction method, for writing data in highly compact binary form in a data storage medium using a microprocessor, compresses serially occurring transaction values in a limited memory space by substituting prefix codes for previously occurring values and for commonly occurring previous values. The previous values are listed and updated on tables by the microprocessor so that they are indexed to the prefix codes adaptively to changing local values and changing common values over time. The data compaction method is particularly suitable for an account card having a limited, non-erasable memory used in an automated transaction terminal for maintaining an account record of transactions in frequently recurring amounts. A postage metering terminal is operated by the account card, in which an initial balance has been written and each purchase of postage is recorded. A current balance is recomputed by parsing the previously recorded data. If the current balance is sufficient, the requested value is recorded in compressed form in the card memory, and the terminal is operated to print or dispense the requested postage.

    摘要翻译: 使用微处理器在数据存储介质中以非常紧凑的二进制形式写入数据的数据压缩方法通过用先前发生的值替换前缀码和普通的先前值来压缩有限存储器空间中的串行发生的交易值。 以前的值由微处理器在表上列出和更新,使得它们自适应地变换到前缀码,以改变本地值并随着时间改变公共值。 数据压缩方法特别适用于具有在自动交易终端中使用的有限的,不可擦除的存储器的帐户卡,用于维持经常重复的交易量的交易的账户记录。 邮资计费终端由帐户卡操作,其中已经写入初始余额并记录每次购买邮资。 通过解析先前记录的数据重新计算当前余额。 如果当前的余额足够,请求的值以压缩形式记录在卡存储器中,并且终端被操作以打印或分发所请求的邮资。

    Clutch mechanism
    3.
    发明授权
    Clutch mechanism 失效
    离合器机构

    公开(公告)号:US4749072A

    公开(公告)日:1988-06-07

    申请号:US47509

    申请日:1987-04-29

    IPC分类号: E05B47/00 E05B47/06 F16D13/22

    摘要: Disclosed is a clutch mechanism suitable for use in an electronic lock. The clutch mechanism requires minimum electronic current draw for operation by utilizing mechanical power applied to operate the lock to engage the clutch mechanism. A camming device in combination with a timed function motion sensor and latching solenoid released interference shutter accomplishes the object of the invention.

    摘要翻译: 公开了适用于电子锁的离合器机构。 离合器机构需要通过利用施加于操作锁来接合离合器机构的机械动力来进行操作的最小电流牵引。 与定时功能运动传感器和闭锁螺线管释放的干涉快门结合的凸轮装置实现了本发明的目的。