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    • 6. 发明授权
    • Subterranean drain system for basements
    • 地下水排水系统
    • US4271648A
    • 1981-06-09
    • US72440
    • 1979-09-04
    • David S. Johnson
    • David S. Johnson
    • E02D31/02E04B1/70E02D19/00
    • E02D31/02E04B1/7023
    • An apparatus for relieving static subterranean water heads surrounding subterranean walls which includes a perforated hollow sleeve arranged to extend through the subterranean wall and into a surrounding static water head. The sleeve has distal and proximal ends, with a plurality of spaced perforations being formed in the wall of the sleeve substantially along the length thereof. The distal end is tapered substantially to a pointed tip, and the tapered tip portion is of generally solid construction. A flanged coupling means is formed adjacent the proximal end for coupling water conduits internally thereof. When desirable, an imperforate sleeve means may be provided adjacent the proximal end for rendering a portion of the perforated hollow sleeve adjacent the proximal end substantially watertight, thereby protecting paneling which may be pre-positioned in the subterranean wall.
    • 一种用于缓解围绕地下壁的静态地下水头的装置,其包括布置成延伸穿过地下壁并进入周围的静态水头的穿孔中空套筒。 套筒具有远端和近端,基本沿着其长度在套筒的壁上形成有多个隔开的穿孔。 该远端基本上成锥形尖端,并且该锥形尖端部分具有一般的坚固结构。 法兰连接装置邻近近端形成,用于在其内部连接水管道。 当需要时,可以邻近近端设置无孔套筒装置,以使穿孔中空套管的一部分邻近近端基本上防水,从而保护预定位于地下壁中的镶板。
    • 10. 发明授权
    • Intelligent circuit breaker providing synchronous switching and
condition monitoring
    • 智能断路器提供同步开关和状态监测
    • US5638296A
    • 1997-06-10
    • US644587
    • 1996-05-10
    • David S. JohnsonAftab H. KhanPaul H. StillerJeffry R. Meyer
    • David S. JohnsonAftab H. KhanPaul H. StillerJeffry R. Meyer
    • H01H11/00H01H33/59G07C3/00
    • H01H33/593H01H11/0062H01H2011/0068
    • An intelligent circuit breaker or switching device system comprises three separate microprocessor-based units, including a condition monitoring unit (CMU) 40, a breaker control unit (BCU) 50, and a synchronous control unit (SCU) 60. The CMU 40 provides detailed diagnostic information by monitoring key quantities associated with circuit breaker or switching device reliability. On-line analysis performed by the CMU provides information facilitating the performance of maintenance as needed and the identification of impending failures. The BCU 50 is a programmable system having self-diagnostic and remote communications. The BCU replaces the conventional electromechanical control circuits typically employed to control a circuit breaker or switching device. The SCU 60 provides synchronous switching control for both closing and opening the circuit interrupters. The control processes carried out by the SCU reduce system switching transients and interrupter wear. The intelligent circuit breaker or switching device system improves system operation and equipment maintenance.
    • 智能断路器或开关装置系统包括三个基于微处理器的单元,包括状态监测单元(CMU)40,断路器控制单元(BCU)50和同步控制单元(SCU)60。 通过监视与断路器相关的关键数量或开关器件的可靠性来诊断诊断信息。 CMU进行的在线分析提供了有助于根据需要执行维护的信息以及即将发生的故障的识别。 BCU 50是具有自诊断和远程通信的可编程系统。 BCU替代了通常用于控制断路器或开关装置的常规机电控制电路。 SCU60为闭合和断开电路断路器提供同步切换控制。 SCU进行的控制过程减少了系统切换瞬变和中断器磨损。 智能断路器或开关装置系统改善了系统运行和设备维护。