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    • 3. 发明授权
    • Burner flashback detection and system shutdown apparatus
    • 燃烧器闪回检测和系统关机装置
    • US07849821B2
    • 2010-12-14
    • US11734648
    • 2007-04-12
    • Jacob A. PeartGary A. ElderWilliam J. HallWilliam T. Harrigill
    • Jacob A. PeartGary A. ElderWilliam J. HallWilliam T. Harrigill
    • F24H1/20
    • F23D14/82F23D14/825F23N5/242F23N2031/28F23N2041/04F24H1/205
    • A fuel-fired water heater is provided with a premixing type main burner and an associated pilot burner for igniting it. A specially designed protective system is operative to detect a flame flashback burning condition in the main burner and responsively shut down the water heater. In one embodiment thereof, the protective system uses main burner body heat to melt a portion of a fuel supply line connected to the pilot burner during a flame flashback condition in the main burner. Such melting responsively causes an associated fuel supply valve to close and terminate water heater operation. In a second protective system embodiment a normally closed pressure switch is opened, thereby shutting down the water heater, when the switch detects a pressure indicative of a flame flashback condition in the main burner.
    • 一个燃油热水器设有一个预混合式主燃烧器和一个用于点火的主燃烧器。 专门设计的保护系统用于检测主燃烧器中的火焰回火燃烧状况,并响应关闭热水器。 在其一个实施例中,在主燃烧器中的火焰回火状态期间,保护系统使用主燃烧器体热量来熔化连接到引燃燃烧器的燃料供应管线的一部分。 这种熔化响应地使相关联的燃料供应阀关闭和终止热水器操作。 在第二保护系统实施例中,当开关检测到指示主燃烧器中的火焰回火状态的压力时,常开的压力开关被打开,从而关闭热水器。
    • 7. 发明授权
    • Mode couplers
    • 模式耦合器
    • US4367446A
    • 1983-01-04
    • US41826
    • 1979-05-23
    • William J. Hall
    • William J. Hall
    • H01P1/16
    • H01P1/16
    • The invention provides a mode coupler arrangement comprising a main waveguide coupled via arrays of slots to two sets of subsidiary waveguides over a common length. One set of subsidiary waveguides is such as to support one mode of propagation and the other set another mode of propagation. In a preferred embodiment the slots in one set of subsidiary guides are staggered by (1.lambda./4) relative to the slots in the other set of subsidiary guides and the guides of one set are longer than the guides of the other set.For TE11 communications mode signals, the two sets of subsidiary guides are of different frequency, with each subsidiary guide arranged such that its variation of wavelength with frequency coincides with that of the main waveguide only in the frequency band for which that subsidiary guide is provided.
    • 本发明提供了一种模式耦合器装置,其包括通过槽的阵列耦合到主体波导,并在公共长度上耦合到两组辅助波导。 一组辅助波导是为了支持一种传播模式,而另一种设置另一种传播模式。 在优选实施例中,一组辅助引导件中的槽相对于另一组辅助引导件中的槽交错(1λ/ 4),并且一组的引导件比另一组的引导件长。 对于TE11通信模式信号,两组辅助导向器具有不同的频率,每个辅助导向器布置成使得其波长与频率的变化仅与提供该辅助导向器的频带中的主波导的变化一致。