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公开(公告)号：US20120302131A1
公开(公告)日：2012-11-29
申请号：US13116057
申请日：2011-05-26
申请人： Robert George Weeden
发明人： Robert George Weeden
摘要： This invention discloses a bee nest for protecting bees from the environment. The bee nest has desiccating and insulating properties, as well as properties that repulse and deter varrora destructor mites. The bee nest comprises a housing having a first open end and a second open end. The first open end is covered by a first end plate which has ventilation means for the housing. A second end plate encloses the second end. Within the housing, there are a plurality of elongate conduits or tubes. Surrounding the plurality of elongate conduits is filler medium, such as crushed volcanic rock filler. Optionally essential oils to deter mites are distributed on the rock filler.
摘要翻译： 本发明公开了一种蜂蜜保护环境。 蜜蜂巢具有干燥和绝缘特性，以及抑制和阻止varrora析构螨的性质。 蜂巢包括具有第一开口端和第二开口端的壳体。 第一开口端由具有用于壳体的通风装置的第一端板覆盖。 第二端板包围第二端。 在壳体内，有多个细长的导管或管。 围绕多个细长导管是填充介质，例如粉碎的火山岩填料。 任选地，防止螨虫的精油分布在岩石填充物上。
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公开(公告)号：US08517793B2
公开(公告)日：2013-08-27
申请号：US13116057
申请日：2011-05-26
申请人： Robert George Weeden
发明人： Robert George Weeden
摘要： This invention discloses a bee nest for protecting bees from the environment. The bee nest has desiccating and insulating properties, as well as properties that repulse and deter varrora destructor mites. The bee nest comprises a housing having a first open end and a second open end. The first open end is covered by a first end plate which has ventilation means for the housing. A second end plate encloses the second end. Within the housing, there are a plurality of elongate conduits or tubes. Surrounding the plurality of elongate conduits is filler medium, such as crushed volcanic rock filler. Optionally essential oils to deter mites are distributed on the rock filler.
摘要翻译： 本发明公开了一种蜂蜜保护环境。 蜜蜂巢具有干燥和绝缘特性，以及抑制和阻止varrora析构螨的性质。 蜂巢包括具有第一开口端和第二开口端的壳体。 第一开口端由具有用于壳体的通风装置的第一端板覆盖。 第二端板包围第二端。 在壳体内，有多个细长的导管或管。 围绕多个细长导管是填充介质，例如粉碎的火山岩填料。 任选地，防止螨虫的精油分布在岩石填充物上。
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公开(公告)号：US4219780A
公开(公告)日：1980-08-26
申请号：US3913
申请日：1979-01-16
申请人： John F. Roulston , George Weeden
发明人： John F. Roulston , George Weeden
CPC分类号： H03G3/3073 , G01S13/4436
摘要： Apparatus for controlling the gains of a pair of gain-matched amplifiers includes means for applying to each amplifier a pilot tone in the form of an exponentially-decaying periodic signal. The apparatus also includes three control loops, one for comparing the output of one amplifier with a reference signal to derive an error signal used to control the amplifier gains when the pilot tone is absent, and a second for controlling the gains when the pilot tone is present. The third loop subtracts the outputs of the two amplifiers and uses the resulting error signal in conjunction with one or other of the signals from the other two loops to control the gain of one of the two amplifiers.
摘要翻译： 用于控制一对增益匹配放大器的增益的装置包括用于以指数衰减的周期性信号的形式向每个放大器施加导频音的装置。 该装置还包括三个控制回路，一个用于将一个放大器的输出与参考信号进行比较，以导出当导频音不存在时用于控制放大器增益的误差信号，另一个用于当导频音为 当下。 第三个环路减去两个放大器的输出，并将所得到的误差信号与来自其他两个环路的一个或另外一个信号相结合，以控制两个放大器之一的增益。
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