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    • 3. 发明申请
    • Capacitor dropping power supply with shunt switching
    • 电容器分接开关电源
    • US20050162022A1
    • 2005-07-28
    • US11035840
    • 2005-01-14
    • John Allard
    • John Allard
    • H02M5/08H02M7/02H02M5/42
    • H02M5/08Y10T307/944
    • A capacitor dropping power supply is disclosed wherein diode power dissipation is avoided due to the unique combination of the diode with the capacitive dropping power supply coupled with a silicon control rectifier (“SCR”). Thus, internal power dissipation is minimized when power is not needed by the load by shorting out the diode. This is accomplished in the form of a voltage regulator wherein a zener diode is used to turn on the SCR when the output voltage exceeds a predetermined level. The SCR provides a shunt switching operation, shunting input current and providing a sufficient amount of power to supply the load and shorting out voltages above a set amount. As a result, there is a power savings when power is not being supplied to the load.
    • 公开了一种电容器放电电源,其中由于二极管与与硅控制整流器(“SCR”)耦合的电容性降压电源的独特组合,避免了二极管功耗。 因此,通过使二极管短路,负载不需要功率时,内部功耗最小化。 这是以电压调节器的形式实现的,其中当输出电压超过预定电平时,使用齐纳二极管来接通SCR。 SCR提供分流开关操作,分流输入电流并提供足够的电力来提供负载并将电压短路超过设定量。 因此,当不向负载供电时,节电。
    • 6. 发明授权
    • Safety circuit for heating devices using PTC wire
    • 使用PTC导线加热装置的安全电路
    • US06355912B2
    • 2002-03-12
    • US09482816
    • 2000-01-13
    • John Allard
    • John Allard
    • H05B102
    • H05B1/0272H05B3/34H05B2203/014H05B2203/02H05B2203/035
    • A heating appliance such as an electric heating blanket having a control circuit which controls the application of power to the heating element of the blanket based on the condition of the heating element. The circuit senses the voltage at the end of the heating element in order to determine if the heating element has a short or an open circuit condition therein. Under normal conditions, the sensed voltage will be above a predetermined threshold value. If the sensed voltage falls below the threshold value, the control circuit shuts off power to the heating element. The control circuit will keep power off until the fault condition has been corrected and power has been removed and reapplied to the control circuit.
    • 一种加热装置,例如具有控制电路的电加热毯,该控制电路基于加热元件的状况来控制向毯子的加热元件施加电力。 该电路感测加热元件末端的电压,以确定加热元件是否在其中具有短路或开路状态。 在正常情况下,感测电压将高于预定的阈值。 如果感测到的电压下降到阈值以下,则控制电路切断加热元件的电源。 控制电路将断开电源,直到故障状态得到纠正,并且电源已经被去除并重新应用于控制电路。
    • 9. 发明授权
    • Method and apparatus for optimizing a security database for a self-service checkout system
    • 用于优化自助结帐系统的安全数据库的方法和装置
    • US07487109B2
    • 2009-02-03
    • US10038405
    • 2002-01-03
    • Brian TaylorJohn Allard
    • Brian TaylorJohn Allard
    • G06Q20/00
    • G07G1/145G06Q20/202G07G1/0054
    • A method of optimizing attribute information of a product attribute stored in a product database is provided. The product database includes update information comprising a time that the attribute information has last been updated and correction history information including recorded samples of new attribute information. The attribute information is used as a security measure in a self-checkout purchasing system to confirm that a purchased product is the same product identified by the system after identification information of the product is input by a user of the system. The method includes conducting a query of the database for any products having said update information older than a predetermined period of time, having correction history information, and where the history information includes a plurality of recorded samples greater than a predetermined amount. The query establishes a query result, whereby revised attribute information is then calculated using the plurality of the recorded samples as data. The revised attribute information is then stored as the current attribute information at a time which replaces the time information contained in the database relating to the time the attribute information was last updated.
    • 提供了一种优化存储在产品数据库中的产品属性的属性信息的方法。 产品数据库包括包括属性信息最后被更新的时间的更新信息和包括新属性信息的记录样本的修正历史信息。 属性信息用作自检结账购买系统中的安全措施,以确认所购买的产品是由系统的识别信息由系统的用户输入之后由系统标识的相同产品。 该方法包括对具有比预定时间段更早的更新信息的任何产品进行查询,具有校正历史信息,并且其中历史信息包括大于预定量的多个记录样本。 查询建立查询结果,由此使用多个记录的样本作为数据来计算修改后的属性信息。 然后,将修改后的属性信息作为当前属性信息存储,代替与数据库中包含的与上次更新属性信息的时间相关的时间信息。