公开(公告)号：US5186540A

公开(公告)日：1993-02-16

申请号：US815717

申请日：1991-12-30

申请人： Arthur L. Walsh ,  Barry E. Genereux

发明人： Arthur L. Walsh ,  Barry E. Genereux

IPC分类号： G01K17/00 ,  G01K17/08 ,  G01R21/02

CPC分类号： G01R21/02 ,  G01K17/003 ,  G01K17/08

摘要： A calorimetric calibration system includes a thermoelectric calibration heat pump device disposed between fluid supplying inlet and outlet pipes coupled to the waterload. The calibration heat pump device provides a controlled delta temperature to the fluid flowing through the pipes for providing a standard of reference for the calibration of calorimetric measurement systems relying on the conversion of RF or microwave energy to heat. The thermoelectric calibration heat pump device consumes a relatively low electrical power, is small in size, inexpensive to manufacture, and is safe to operate.

摘要翻译： 量热校准系统包括设置在与水负荷相连的流体供应入口和出口管之间的热电校准热泵装置。 校准热泵装置为流经管道的流体提供受控的增量温度，以提供依赖于将RF或微波能量转换成热量的量热测量系统的校准的参考标准。 热电校准热泵装置消耗相对较低的电力，尺寸小，制造成本低，操作安全。

公开(公告)号：US5175516A

公开(公告)日：1992-12-29

申请号：US682815

申请日：1991-04-09

申请人： Arthur L. Walsh ,  Barry E. Genereux

发明人： Arthur L. Walsh ,  Barry E. Genereux

IPC分类号： H01P1/26

CPC分类号： H01P1/264

摘要： A liquid cooled adjustable waveguide termination for use in high power applications is described. The liquid cooled adjustable termination includes a waveguide housing having a shorting plate disposed at an end portion of the housing and an electromagnetic energy absorbent element disposed within the waveguide. The absorbent element includes a hollow tube disposed within a bore of the element for providing the liquid coolant to an inner portion of the element. The termination further includes a flow header assembly for providing coolant to the absorbent element via the hollow tube and for directing the heated coolant out of the termination assembly, and an adjustable seal plate disposed between the flow header assembly and the shorting plate for adjusting the position of the electromagnetic energy absorbent element within the waveguide.

摘要翻译： 描述了用于大功率应用的液冷可调波导终端。 液体冷却的可调节终端包括波导壳体，其具有设置在壳体的端部处的短路板和设置在波导内的电磁能量吸收元件。 吸收元件包括设置在元件的孔内的中空管，用于将液体冷却剂提供到元件的内部。 该终端还包括流动集管组件，其用于经由中空管将冷却剂提供给吸收元件并用于将加热的冷却剂引导出终端组件;以及可调整密封板，其设置在流量集管组件和短路板之间，用于调节位置 的波导内的电磁能吸收体。

公开(公告)号：US4794591A

公开(公告)日：1988-12-27

申请号：US137904

申请日：1987-12-28

申请人： James Hoff ,  Arthur L. Walsh ,  John S. Young

发明人： James Hoff ,  Arthur L. Walsh ,  John S. Young

IPC分类号： H04M3/56 ,  H04Q11/04

CPC分类号： H04M3/561 ,  H04M3/002

摘要： An echo cancellation arrangement is provided for decreasing the "singing" of a connection of a large number of telephone subscribers in a conference calling arrangement. This arrangement includes a means for inserting quiet code during time when the voice samples of incoming PCM data are zero or below a predetermined minimum threshold level. This helps decrease the amount of feedback which is amplified and output through the codec/filter to the listeners through the PCM network. An attenuation arrangement is also included which decreases the level of a summed signal of a summing node of the conference circuit. This sum signal is the combination of each of the conferees' speech. Attenuation of this signal prohibits excessive coupling of amplified feedback to each of the listening conferees.

摘要翻译： 提供一种回音抵消装置，用于减少会议呼叫装置中大量电话用户的连接的“歌唱”。 这种布置包括用于在输入的PCM数据的语音样本为零或低于预定的最小阈值水平的时间期间插入静音码的装置。 这有助于通过PCM网络将通过编解码器/滤波器放大和输出的反馈量减少到听众。 还包括减少会议电路的求和节点的求和信号的电平的衰减装置。 这个和信号是每位与会者演讲的组合。 该信号的衰减禁止放大的反馈过度耦合到每个聆听者。

公开(公告)号：US4866703A

公开(公告)日：1989-09-12

申请号：US138102

申请日：1987-12-28

申请人： James B. Black ,  Donovan A. Bruce ,  Mauro Cordani ,  Mike Gilbert ,  Tom Perry ,  Arthur L. Walsh ,  Gary Wiren ,  Steve A. Wright ,  John S. Young

发明人： James B. Black ,  Donovan A. Bruce ,  Mauro Cordani ,  Mike Gilbert ,  Tom Perry ,  Arthur L. Walsh ,  Gary Wiren ,  Steve A. Wright ,  John S. Young

IPC分类号： H04Q11/04

CPC分类号： H04Q11/0428 ,  H04Q2213/13093 ,  H04Q2213/13103 ,  H04Q2213/13174 ,  H04Q2213/13194 ,  H04Q2213/13196 ,  H04Q2213/13205 ,  H04Q2213/13209 ,  H04Q2213/13292 ,  H04Q2213/13389

摘要： An Integrated Services Digital Network module includes a time division multiplexed switching network. Subscribers are connected to the time division multiplex network via a number of facility interface cards. These facility interface cards provide for two wire subscriber connection, four wire subscriber connection, T1 line connection and for three port conferencing arrangements. Originating and terminating multiplexers connect the facility interface cards to the time switching network. Another subsystem provides protocol interfaces for HDLC channels. Another subsystem provides interface to central office switching systems. Lastly, a general purpose computer and file computer system provide for the storage of database and form maintenance functions. Each subsystem is controlled via processor which is linked with each of the other processors by an ethernet local area network. This system provides both Primary Rate (23B+D) and Basic Rate (2B+D) interfaces to the subscribers.

摘要翻译： 综合业务数字网络模块包括时分复用交换网络。 订户通过多个设施接口卡连接到时分复用网络。 这些设备接口卡提供两线用户连接，四线用户连接，T1线路连接和三端口会议安排。 起始和终端复用器将设备接口卡连接到时间交换网络。 另一个子系统为HDLC通道提供协议接口。 另一个子系统提供与中心局交换系统的接口。 最后，通用计算机和文件计算机系统提供数据库和表单维护功能的存储。 每个子系统通过处理器进行控制，处理器通过以太网局域网与每个其他处理器相连。 该系统向用户提供主速率（23B + D）和基本速率（2B + D）接口。