公开(公告)号：US5963595A

公开(公告)日：1999-10-05

申请号：US925205

申请日：1997-09-08

申请人： Martin H. Graham ,  Harold H. Webber, Jr.

发明人： Martin H. Graham ,  Harold H. Webber, Jr.

IPC分类号： H04L25/49 ,  H03K7/08

CPC分类号： H04L25/4902

摘要： A method and apparatus for encoding a bit sequence as a symbol, suitable for transmission over POTS wiring, are described. The symbol has a duration indicative of the bit sequence, this time duration be determined by first and second delimiters. The method commences upon the receipt of a bit sequence at an encoder. Thereafter, a symbol, having a duration indicative of the bit sequence, is identified. The symbol is characterized in that it includes a buffer portion and an encoding portion. The buffer portion is of sufficient duration to allow reflections, generated by propagation of the first delimiter of the symbol on the POTS wiring, to decay to a predetermined level before propagation of the second delimiter.

摘要翻译： 描述用于编码比特序列作为符号的方法和装置，其适合于通过POTS布线的传输。 符号具有指示比特序列的持续时间，该持续时间由第一和第二分隔符确定。 该方法在编码器接收到比特序列时开始。 此后，识别具有指示比特序列的持续时间的符号。 该符号的特征在于它包括缓冲部分和编码部分。 缓冲器部分具有足够的持续时间，以允许由POTS布线上的符号的第一分隔符的传播产生的反射在第二定界符传播之前衰减到预定的水平。

公开(公告)号：US06246718B1

公开(公告)日：2001-06-12

申请号：US09199113

申请日：1998-11-24

申请人： Martin H. Graham ,  Harold H. Webber, Jr.

发明人： Martin H. Graham ,  Harold H. Webber, Jr.

IPC分类号： H03K708

CPC分类号： H04L25/4902

摘要： A method and apparatus for decoding a symbol, having a time duration indicative of a bit sequence and determined by first and second delimiters being with the detection of the first delimiter of the symbol on a carrier medium. A predetermined blanking interval is measured following detection of this first delimiter. Detection of the second delimiter on the carrier medium is prevented prior to expiration of the predetermined blanking interval. This is to prevent the detection of reflections resulting from the propagation of the first delimiter over the carrier medium, and the incorrect identification of such reflections as the second delimiter of the symbol. The valid second delimiter of the symbol is then detected on a carrier medium subsequent to expiration of the predetermined blanking interval. A symbol, indicative of the bit sequence, is identified from a group of symbols based on the time duration between the respective detections of the first and second delimiters.

摘要翻译： 用于对符号进行解码的方法和装置，具有指示位序列的时间长度并由第一和第二分隔符确定的符号与载体介质上的符号的第一分隔符的检测。 在检测到第一分隔符之后测量预定的消隐间隔。 在预定的消隐间隔期满之前，防止载体介质上的第二分隔符的检测。 这是为了防止由于第一分隔符在载体介质上的传播而产生的反射的检测以及与符号的第二分隔符的这种反射的不正确的识别。 然后在预定的消隐间隔期满之后，在载体介质上检测符号的有效第二分隔符。 基于第一和第二分隔符的相应检测之间的持续时间，从一组符号识别指示比特序列的符号。

公开(公告)号：US06678321B1

公开(公告)日：2004-01-13

申请号：US09153812

申请日：1998-09-15

申请人： Martin H. Graham ,  Harold H. Webber, Jr. ,  Matthew Taylor

发明人： Martin H. Graham ,  Harold H. Webber, Jr. ,  Matthew Taylor

IPC分类号： H03K708

CPC分类号： H03K7/08

摘要： A method of transmitting information over POTS wiring includes transmitting a first delimiter signal, in the form of a multi-cycle waveform having a frequency of approximately 7.5 MHz, over the POTS wiring. A second delimiter signal, also comprising a multi-cycle waveform, is then later propagated over the POTS wiring. The time duration between the respective propagations of the first and second delimiter signals defines a symbol, which encodes information. The time duration is also such that reflections on the carrier medium resulting from the propagation of the first delimiter signal decay to a predetermined level prior to propagation of the second delimiter signal.

摘要翻译： 通过POTS布线发送信息的方法包括通过POTS布线发送具有大约7.5MHz频率的多周期波形形式的第一分隔符信号。 然后，还包括多周期波形的第二分隔符信号随后在POTS布线上传播。 第一和第二定界符信号的相应传播之间的持续时间定义了对信息进行编码的符号。 持续时间还使得由第一定界符信号的传播导致的载波介质上的反射在第二定界符信号的传播之前衰减到预定的水平。

公开(公告)号：US20090086460A1

公开(公告)日：2009-04-02

申请号：US11904991

申请日：2007-09-28

申请人： Martin H. Graham

发明人： Martin H. Graham

IPC分类号： H05K9/00

CPC分类号： H01J61/327 ,  F21V15/02 ,  H01J61/04 ,  H01J61/56

摘要： A conductive shield for surrounding a high efficiency light bulb such as a spiral fluorescent bulb is described. A conductive curtain having apertures through which light may pass is connected to the threaded grounded base of the bulb. The apertures in the curtain present high impedance to stray electrical energy (SEE) from the bulb thereby reducing SEE.

摘要翻译： 描述了用于围绕诸如螺旋荧光灯泡的高效率灯泡的导电屏蔽。 具有光通过的孔的导电帘连接到灯泡的带螺纹的接地基座。 窗帘中的开孔呈现高阻抗，从灯泡流出电能（SEE），从而减少SEE。

公开(公告)号：US06234108B1

公开(公告)日：2001-05-22

申请号：US09287529

申请日：1999-04-07

申请人： Martin H. Graham

发明人： Martin H. Graham

IPC分类号： A01J700

CPC分类号： A01J5/00 ,  A01J7/00

摘要： A voltage compensation circuit is coupled to a conventional milking system so that when a milk stream flows from a cow to a milk pipeline, a voltage compensation circuit makes contact with the milk stream. As a result, due to the voltage compensation circuit's output voltage, a current that might be generated by the electric potential difference between the cow and the milk pipeline is prevented from flowing within the milk stream. Accordingly, electric shocks to the cow are effectively prevented.

摘要翻译： 电压补偿电路耦合到常规的挤奶系统，使得当奶流从牛流到牛奶管道时，电压补偿电路与牛奶流接触。 结果，由于电压补偿电路的输出电压，可以防止牛和牛奶管道之间的电位差产生的电流在牛奶流内流动。 因此，有效地防止对母牛的电击。

公开(公告)号：US5812597A

公开(公告)日：1998-09-22

申请号：US638570

申请日：1996-01-30

申请人： Martin H. Graham ,  Matthew Taylor

发明人： Martin H. Graham ,  Matthew Taylor

IPC分类号： H04L25/06 ,  H04L25/00

CPC分类号： H04L25/063

摘要： A receiver for a LAN which uses a transformer for isolation. Base line wander is prevented by use of a positive feedback path which provides a signal that compensates for low frequency loss through the transformer. The feedback path connects the output of the receiver to the secondary winding of the transformer. The time constant of the transformer and terminating resistor L/R equals the RC time constant in the feedback path.

摘要翻译： 用于LAN的接收器，其使用变压器进行隔离。 通过使用提供补偿通过变压器的低频损耗的信号的正反馈路径来防止基线漂移。 反馈路径将接收器的输出连接到变压器的次级绕组。 变压器和终端电阻L / R的时间常数等于反馈路径中的RC时间常数。

公开(公告)号：US5260664A

公开(公告)日：1993-11-09

申请号：US4638

申请日：1993-01-12

申请人： Martin H. Graham

发明人： Martin H. Graham

IPC分类号： G08B29/06 ,  H04L12/26 ,  G08B23/00

CPC分类号： G08B29/06 ,  H04L43/0811

摘要： An apparatus for monitoring and testing a twisted pair, particularly useful for an Ethernet network. First and second DC currents alternated with one another are applied to both ends of the line, asynchronously. By monitoring the potential on the line, a determination is made as to the condition of the line. For example, shorted, crossed, improperly terminated or open conditions can be detected. A visual indication of the condition of the line is provided and additionally, the visual indication provides an indication of the traffic level in the network.

摘要翻译： 一种用于监控和测试双绞线的设备，特别适用于以太网。 彼此交替的第一和第二直流电流被异步地施加到线路的两端。 通过监测线路上的电位，确定线路的状况。 例如，可以检测到短路，交叉，不正确终止或开放条件。 提供线路状况的视觉指示，另外视觉指示提供网络中流量级别的指示。

公开(公告)号：US4627050A

公开(公告)日：1986-12-02

申请号：US613026

申请日：1984-05-22

申请人： Howard W. Johnson ,  Michael G. Duncan ,  Rod G. Sinks ,  John D. Edwards ,  Martin H. Graham ,  James M. Kasson ,  Charles M. Corbalis

发明人： Howard W. Johnson ,  Michael G. Duncan ,  Rod G. Sinks ,  John D. Edwards ,  Martin H. Graham ,  James M. Kasson ,  Charles M. Corbalis

IPC分类号： H04Q3/545 ,  H04J3/00 ,  H04L12/40 ,  H04Q11/04 ,  H04J3/02 ,  H04J3/16

CPC分类号： H04L12/4035 ,  H04L12/40013 ,  H04Q11/04

摘要： An improved architecture for a computerized branch exchange particularly for a time division multiplexed bus used in the exchange. An intershelf bus includes a unidirectional source bus which receives signals from expanders and a unidirectional destination bus which transmits signals to the expanders. The expanders, through another bus, communicate with line cards which interface with telephone station sets, commercial lines, etc. A time division multiplexed controller updates distributed connection tables contained in each of the expanders and controls the flow of data onto and from the unidirectional buses. The distributed connection tables eliminate the need to broadcast addresses during each time slot. The arrangement is particularly useful in reducing blocking associated with prior art bidirectional buses.

摘要翻译： 用于计算机化分支交换的改进的架构，特别是用于交换中使用的时分复用总线。 机间总线包括从扩展器接收信号的单向源总线和向扩展器发送信号的单向目的地总线。 扩展器通过另一个总线与与电话台组，商业线路等接口的线路卡通信。时分复用控制器更新包含在每个扩展器中的分布式连接表，并且控制数据到单向总线和从单向总线 。 分布式连接表消除了在每个时隙期间广播地址的需要。 该装置在减少与现有技术的双向总线相关联的阻塞方面特别有用。

公开(公告)号：US07560982B2

公开(公告)日：2009-07-14

申请号：US11650098

申请日：2007-01-05

申请人： Martin H. Graham

发明人： Martin H. Graham

IPC分类号： H02M1/12

CPC分类号： H03H11/12

摘要： An Op amp circuit is used to provide higher capacitance to a power network to remove unwanted high frequency components from the power signal. At the primary power line frequency, a lower capacitance is presented by the circuit.

摘要翻译： 运算放大器电路用于向电力网络提供更高的电容以从功率信号中去除不需要的高频分量。 在主电源线频率下，电路呈现较低的电容。

公开(公告)号：US20080164767A1

公开(公告)日：2008-07-10

申请号：US11650098

申请日：2007-01-05

申请人： Martin H. Graham

发明人： Martin H. Graham

IPC分类号： H02J1/02 ,  H03B1/00

CPC分类号： H03H11/12

摘要： An Op amp circuit is used to provide higher capacitance to a power network to remove unwanted high frequency components from the power signal. At the primary power line frequency, a lower capacitance is presented by the circuit.

摘要翻译： 运算放大器电路用于向电力网络提供更高的电容以从功率信号中去除不需要的高频分量。 在主电源线频率下，电路呈现较低的电容。