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    • 1. 发明授权
    • Temperature operated gas valve
    • 温控气阀
    • US4949742A
    • 1990-08-21
    • US344325
    • 1989-04-26
    • Joseph F. RandoIlya M. Fishman
    • Joseph F. RandoIlya M. Fishman
    • F16K13/10F16K31/00
    • F16K13/10F16K31/002Y10T137/0391Y10T137/2196
    • A gas valve which is particularly useful in a laser gas fill system requiring repeated fillings includes a conduit positioned between high and low pressure gas regions. Within the conduit is a restriction, and this restriction is closed by a meltable solid material. When the valve is to be opened, heat is applied to the meltable solid material, either internally or externally, causing at least some of the material to flow and allow the passage of gas from the higher pressure region to the lower pressure region. When the pressure between the two regions has substantially equalized, or at least the pressure differential has greatly diminished, surface tension associated with the restriction in the conduit pulls the liquified material back into place to close and reseal the valve, at which point heat application is dicontinued so that the material again becomes solid. The geometry of the restriction is such that all or substantially all of the liquid material will return essentially to its original position, allowing the valve to be used in repeated on/off cycles. Also, the valve geometry and heat application are such a high pressure differential will not cause the liquified material to blow away from the valve due to high velocities.
    • 在需要重复填充的激光气体填充系统中特别有用的气阀包括位于高压气体区域和低压气体区域之间的导管。 在管道内是限制,这种限制由可熔融的固体材料封闭。 当要打开阀门时,内部或外部将热量施加到可熔融的固体材料上,使至少一些材料流动并允许气体从较高压力区域通到较低压力区域。 当两个区域之间的压力基本相等时,或者至少压差大大减小时,与管道中的限制相关联的表面张力将液化材料拉回到适当位置以关闭和重新密封阀,此时热施加 使材料再次变得固体。 限制的几何形状使得所有或基本上所有的液体材料将基本上返回到其原始位置,允许阀被重复的开/关循环使用。 此外,阀的几何形状和热应用是这样的高压差将不会导致液化材料由于高速度而从阀门吹走。
    • 5. 发明授权
    • Method and system for service restoration in optical fiber communication
networks
    • 光纤通信网络中业务恢复的方法和系统
    • US5982517A
    • 1999-11-09
    • US867346
    • 1997-06-02
    • Ilya M. Fishman
    • Ilya M. Fishman
    • H04B10/00H04B10/20H04J14/00
    • H04J14/0297H04B10/032H04J14/0283H04J14/0286H04J14/029
    • A service restoration system and method for a mixed SONET/WDM optical fiber telecommunication networks comprising a plurality of self healing SONET rings and at least one WDM link which is shared by these SONET rings, provides protection on the optical layer of at least one WDM link in case of fiber or cable cut. The WDM link protection is provided by rerouting the WDM link traffic through a dedicated protection ring which is selected from the plurality of self healing SONET rings, via color blind optical fiber-to-fiber switches. The WDM working equipment protection is provided by rerouting the SONET traffic via additional optical switches and wavelength converters through WDM link. Wavelength converter aligns the wavelength of the optical signal to match the wavelength of failed WDM channel, to localize and heal the failure of the WDM working equipment without reporting to the adjacent nodes.
    • 一种用于混合SONET / WDM光纤电信网络的服务恢复系统和方法,包括多个自愈SONET环和由这些SONET环共享的至少一个WDM链路,在至少一个WDM链路的光层上提供保护 在纤维或电缆切割的情况下。 通过经由色盲光纤到光纤交换机从多个自愈SONET环中选择的专用保护环重新路由WDM链路流量来提供WDM链路保护。 WDM工作设备保护通过WDM链路通过附加的光开关和波长转换器重新路由SONET流量来提供。 波长转换器将光信号的波长对准以匹配失败的WDM信道的波长,以便定位并修复WDM工作设备的故障,而不向相邻节点报告。