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21 条记录 (耗时 0.015 秒)

    Solid state tripping circuit
    3.
    发明授权
    Solid state tripping circuit 失效
    固态跳闸电路

    公开(公告)号：US4152744A

    公开(公告)日：1979-05-01

    申请号：US807585

    申请日：1977-06-17

    申请人： Peter Pang

    发明人： Peter Pang

    IPC分类号： H02H1/00 ,  H02H3/093 ,  H02H3/08

    CPC分类号： H02H1/0007 ,  H02H3/093

    摘要： The primary winding of a saturable transformer, coupled to an a.c. circuit, drives the core of the transformer into saturation during at least a portion of the cycle of an a.c. current flowing through the circuit. A plurality of rise-time indicator pulses, having a duration inversely proportional to the rate of rise of the a.c. current being monitored, is induced in the secondary winding of the saturable transformer. The rise-time indicator pulses appearing in the secondary winding of the saturable transformer are applied to a pick-up circuit which generates a plurality of rectangular pulses whenever the a.c. current exceeds the normal rated value of the circuit. The pulses generated by the pick-up circuit each have a duty cycle inversely proportional to the rate of rise of the a.c. current being monitored. An inverter circuit, responsive to the pulses generated by the pick-up circuit, generates a second series of rectangular pulses having a duty cycle proportional to the rate of rise of the a.c. current being monitored. The second series of pulses are applied to a tripping circuit which monitors the duty cycles of these pulses and interrupts a.c. current flow in said circuit after a time delay which is inversely proportional to the magnitude of the a.c. current being monitored.

    摘要翻译： 饱和变压器的初级绕组，耦合到一个直流 电路在变压器的核心在直流电的循环的至少一部分期间驱动饱和。 流过电路的电流。 多个上升时间指示符脉冲，其持续时间与a.c.的上升速率成反比。 被监测的电流在可饱和变压器的次级绕组中感应出来。 出现在可饱和变压器的次级绕组中的上升时间指示器脉冲被施加到拾取电路，每当交流电流产生多个矩形脉冲。 电流超过电路的正常额定值。 由拾取电路产生的脉冲各自具有与a.c.的上升率成反比的占空比。 正在监视。 响应于拾取电路产生的脉冲的逆变器电路产生具有与交流电的上升速率成比例的占空比的第二系列矩形脉冲。 正在监视。 第二系列脉冲被施加到跳闸电路，该跳闸电路监视这些脉冲的占空比并中断a.c. 在与a.c.的大小成反比的时间延迟之后的所述电路中的电流。 正在监视。

    Apparatus, method, and file format for text with synchronized audio
    7.
    发明申请
    Apparatus, method, and file format for text with synchronized audio 审中-公开
    具有同步音频的文本的设备，方法和文件格式

    公开(公告)号：US20080005656A1

    公开(公告)日：2008-01-03

    申请号：US11812133

    申请日：2007-06-15

    申请人： Shu Fan Stephen Pang ,  Chi Fan John Pang ,  Ping Pan Peter Pang ,  Christina Mullins

    发明人： Shu Fan Stephen Pang ,  Chi Fan John Pang ,  Ping Pan Peter Pang ,  Christina Mullins

    IPC分类号： G06F17/00

    CPC分类号： G09B5/062

    摘要： A method of synchronizing an audio narration of a text with a display of the text, in which the text and audio narration are encoded in a data file, includes: performing a page setup operation for displaying the text in a predetermined sequence; displaying the text in accordance with the page setup operation; outputting the audio narration of the text; and synchronizing the audio narration and the displayed text. Synchronizing information may be embedded in a text or audio portion of the data file. An associated apparatus includes a storage device, a display, and a processor. A file formatted for enabling a display of text and a synchronized audible narration of the text includes textual data corresponding to the text and audio data corresponding to the audible narration of the text. The textual data includes synchronization data embedded within the text, and can include page setup information sufficient for a processor to perform a page setup operation without the use of xml tags.

    摘要翻译： 一种使文本的音频叙述与文本和音频叙述在数据文件中被编码的文本的显示同步的方法包括：以预定的顺序执行用于显示文本的页面设置操作; 根据页面设置操作显示文本; 输出文本的音频叙述; 并同步音频叙述和显示的文本。 同步信息可以嵌入数据文件的文本或音频部分。 相关联的设备包括存储设备，显示器和处理器。 格式化用于启用文本显示和文本的同步可听叙述的文件包括对应于对应于文本的可听叙述的文本和音频数据的文本数据。 文本数据包括嵌入在文本内的同步数据，并且可以包括足以使处理器执行页面设置操作而不使用xml标签的页面设置信息。