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1. 发明授权

US5243338A Two and three wire utility data communications system 失效
标题翻译：二线三线实用数据通信系统
公开(公告)号：US5243338A
公开(公告)日：1993-09-07
申请号：US903212
申请日：1992-06-23
申请人： William J. Brennan, Jr. , David R. Hamilton , Warren C. Wynn, Jr.
发明人： William J. Brennan, Jr. , David R. Hamilton , Warren C. Wynn, Jr.
IPC分类号： G01D4/00 , G08C17/04 , G08C19/28 , H04Q9/00
CPC分类号： H04Q9/00 , G01D4/004 , G08C17/04 , G08C19/28 , H04Q2209/60 , Y02B90/242 , Y02B90/243 , Y04S20/322 , Y04S20/325 , Y04S20/36
摘要： A two wire/three wire utility data communications system for remotely reading utility meter registers. In the two wire version, a hand-held reading unit is inductively coupled over two wires via a port located remotely from a meter register. Alternatively, a meter interface unit (MIU) may be connected directly to the register via three wires. Each register includes one or more wheel position encoders. An AC interrogation signal is applied by the reading unit to encoder circuitry at the meter which powers the circuitry and causes the position of each encoder wheel to be read. In the two wire mode, register display information (e.g. the current meter reading) is transmitted back to the reading unit by varying the load (impedance) presented by the register side of the circuit. This causes a corresponding variation of the amount of current drawn from the reading unit. The current-modulated signal is decoded by the reading unit and converted into a register reading. The system can also operate in a three wire mode and read older fourteen wire encoded registers. Other features include remote programmability of register characteristics, the ability to interrogate multiple registers which share a common data bus, verification of encoder wheel positions before accepting a reading, real-time flow rate/leak detection, pulse output, and the capability of reading compound meters (i.e. meters having two registers to separately measure high/low flow rates).
摘要翻译：一个用于远程读取公用事业仪表寄存器的双线/三线公用事业数据通信系统。在双线版本中，手持读取单元通过位于远离仪表寄存器的端口通过两根电线感应耦合。或者，仪表接口单元（MIU）可以通过三条线直接连接到寄存器。每个寄存器包括一个或多个车轮位置编码器。读取单元将AC询问信号施加到仪表处的编码器电路，为电路供电，并使每个编码器轮的位置被读取。在两线模式中，通过改变由电路的寄存器侧呈现的负载（阻抗）将寄存器显示信息（例如当前的读表）传送回读取单元。这导致从读取单元抽取的电流量的相应变化。电流调制信号由读取单元解码并转换成寄存器读数。该系统还可以以三线模式工作，并读取较旧的十四线编码寄存器。其他功能包括寄存器特性的远程可编程性，询问共享公共数据总线的多个寄存器的能力，接受读取前的编码器轮位置的验证，实时流量/泄漏检测，脉冲输出以及读取化合物的能力米（即具有两个单独测量高/低流量的寄存器的仪表）。

2. 发明授权

US5155481A Two and three wire utility data communications system 失效
标题翻译：两线和三线实用数据通信系统
公开(公告)号：US5155481A
公开(公告)日：1992-10-13
申请号：US528391
申请日：1990-05-25
申请人： William J. Brennan, Jr. , David R. Hamilton , Warren C. Wynn, Jr.
发明人： William J. Brennan, Jr. , David R. Hamilton , Warren C. Wynn, Jr.
IPC分类号： G08C19/00 , G01D4/00 , G08C17/04 , G08C19/28 , H04L29/04 , H04Q9/00
CPC分类号： G01D4/004 , G08C17/04 , G08C19/28 , H04Q9/00 , H04Q2209/60 , Y02B90/242 , Y02B90/243 , Y04S20/322 , Y04S20/325 , Y04S20/36
摘要： A two wire/three wire utility data communications system for remotely reading utility meter registers. In the two wire version, a hand-held reading unit is inductively coupled over two wires via a port located remotely from a meter register. Alternatively, a meter interface unit (MIU) may be connected directly to the register via three wires. Each register includes one or more wheel position encoders. An AC interrogation signal is applied by the reading unit to encoder circuitry at the meter which powers the circuitry and causes the position of each encoder wheel to be read. In the two wire mode, register display information (e.g. the current meter reading) is transmitted back to the reading unit by varying the load (impedance) presented by the register side of the circuit. This causes a corresponding variation of the amount of current drawn from the reading unit. The current-modulated signal is decoded by the reading unit and converted into a register reading. The system can also operate in a three wire mode and read older fourteen wire encoded registers. Other features include remote programmability of register characteristics, the ability to interrogate multiple registers which share a common data bus, verification of encoder wheel positions before accepting a reading, real-time flow rate/leak detection, pulse output, and the capability of reading compound meters (i.e. meters having two registers to separately measure high/low flow rates).

3. 发明授权

US5252967A Reader/programmer for two and three wire utility data communications system 失效
标题翻译：读写器用于二线和三线实用数据通信系统
公开(公告)号：US5252967A
公开(公告)日：1993-10-12
申请号：US903203
申请日：1992-06-23
申请人： Jr.; William J. Brennan , David R. Hamilton , Warren C. Wynn, Jr.
发明人： Jr.; William J. Brennan , David R. Hamilton , Warren C. Wynn, Jr.
IPC分类号： G01D4/00 , G08C17/04 , G08C19/28 , H04Q9/00 , G08B19/02
CPC分类号： G01D4/004 , G08C17/04 , G08C19/28 , H04Q9/00 , H04Q2209/60 , Y02B90/242 , Y02B90/243 , Y04S20/322 , Y04S20/325 , Y04S20/36
摘要： A two wire/three wire utility data communications system for remotely reading utility meter registers. In the two wire version, a hand-held reading unit is inductively coupled over two wires via a port located remotely from a meter register. Alternatively, a meter interface unit (MIU) may be connected directly to the register via three wires. Each register includes one or more wheel position encoders. An AC interrogation signal is applied by the reading unit to encoder circuitry at the meter which powers the circuitry and causes the position of each encoder wheel to be read. In the two wire mode, register display information (e.g. the current meter reading) is transmitted back to the reading unit by varying the load (impedance) presented by the register side of the circuit. This causes a corresponding variation of the amount of current drawn from the reading unit. The current-modulated signal is decoded by the reading unit and converted into a register reading. The system can also operate in a three wire mode and read older fourteen wire encoded registers. Other features include remote programmability of register characteristics, the ability to interrogate multiple registers which share a common data bus, verification of encoder wheel positions before accepting a reading, real-time flow rate/leak detection, pulse output, and the capability of reading compound meters (i.e. meters having two registers to separately measure high/low flow rates).
摘要翻译：一个用于远程读取公用事业仪表寄存器的双线/三线公用事业数据通信系统。在双线版本中，手持读取单元通过位于远离仪表寄存器的端口通过两根电线感应耦合。或者，仪表接口单元（MIU）可以通过三条线直接连接到寄存器。每个寄存器包括一个或多个车轮位置编码器。读取单元将AC询问信号施加到仪表处的编码器电路，为电路供电，并使每个编码器轮的位置被读取。在两线模式中，通过改变由电路的寄存器侧呈现的负载（阻抗）将寄存器显示信息（例如当前的读表）传送回读取单元。这导致从读取单元抽取的电流量的相应变化。电流调制信号由读取单元解码并转换成寄存器读数。该系统还可以以三线模式工作，并读取较旧的十四线编码寄存器。其他功能包括寄存器特性的远程可编程性，询问共享公共数据总线的多个寄存器的能力，接受读取前的编码器轮位置的验证，实时流量/泄漏检测，脉冲输出以及读取化合物的能力米（即具有两个单独测量高/低流量的寄存器的仪表）。

4. 发明授权

US4221676A Phosphor purification process 失效
标题翻译：荧光粉净化过程
公开(公告)号：US4221676A
公开(公告)日：1980-09-09
申请号：US35890
申请日：1979-05-04
申请人： Charles B. Bruskotter , David R. Hamilton
发明人： Charles B. Bruskotter , David R. Hamilton
IPC分类号： C09K11/74 , C09K11/10
CPC分类号： C09K11/7442
摘要： A process for removing suspected heavy metal contaminants from a manganese-arsenic activated, zinc orthosilicate phosphor comprises contacting the phosphor, in an aqueous slurry, with an organic chelating agent such as an alkali metal salt of ethylenediamine tetraacetate and subsequently rinsing, filtering, drying and sieving the phosphor and baking the sieved phosphor.
摘要翻译：从锰 - 砷活化的原硅酸锌荧光粉中除去可疑的重金属污染物的方法包括使含水浆液中的荧光体与有机螯合剂如乙二胺四乙酸的碱金属盐接触，随后漂洗，过滤，干燥和筛分荧光粉并烘烤筛分的荧光粉。

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