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    • 1. 发明授权
    • Reworkable, thermally-conductive adhesives for electronic assemblies
    • 用于电子组件的可再生导热粘合剂
    • US6132850A
    • 2000-10-17
    • US755938
    • 1996-11-25
    • Ralph D. HermansenRichard F. DavisE. Dean Johnston
    • Ralph D. HermansenRichard F. DavisE. Dean Johnston
    • H05K3/00H05K3/28B32B5/16
    • H05K3/284H05K3/0058Y10T428/24893
    • An adhesive and method for attaching a heat sink to a printing wiring assembly that provides a thermal path from electronic components on the printing wiring assembly to the heat sink. The adhesive is flexible and accommodates thermal expansion stresses and is readily reworkable. The adhesive comprises a filler material that is disposed between the heat sink and the printing wiring assembly, and an impregnant that impregnates the filler material, which impregnated filler material is cured. The filler material may comprise alumina particles that have a spherical shape. The impregnant comprises a polymer, typically selected from a group of epoxy resins and their curatives that form a flexible material when cured. In practicing the method, a heat sink is positioned adjacent to and spaced apart from a printing wiring assembly to provide an appropriate spacing between them. The periphery of the printing wiring assembly is sealed. A cavity that is formed between the heat sink and the printing wiring assembly is filled with a filler material. The filled assembly is vibrated to maximize packing density of the filler material. The filler material is then impregnated with a flexible epoxy impregnant. The impregnant is then cured to form the flexible adhesive. This produces a structure wherein the heat sink is bonded to the printed wiring assembly.
    • 一种用于将散热器附接到印刷布线组件的粘合剂和方法,其提供从打印布线组件上的电子部件到散热器的热路径。 粘合剂是柔性的并且适应热膨胀应力并且易于再加工。 粘合剂包括布置在散热器和印刷布线组件之间的填充材料,以及浸渍填充材料的浸渍剂,浸渍的填充材料被固化。 填充材料可以包括具有球形形状的氧化铝颗粒。 浸渍剂包括通常选自一组环氧树脂及其固化剂的聚合物,其在固化时形成柔性材料。 在实施该方法时,将散热器定位成与印刷布线组件相邻并间隔开以在它们之间提供适当的间隔。 印刷布线组件的周边被密封。 在散热器和印刷布线组件之间形成的空腔填充有填充材料。 填充的组件被振动以最大化填充材料的堆积密度。 然后用柔性环氧浸渍剂浸渍填料。 然后将浸渍剂固化以形成柔性粘合剂。 这产生其中散热器被结合到印刷线路组件的结构。
    • 3. 发明授权
    • Blue-sensitive film for radiography with reduced dye stain
    • 蓝色感光膜,用于放射线照相,染色剂染色减少
    • US06686117B1
    • 2004-02-03
    • US10397537
    • 2003-03-26
    • Robert E. DickersonRichard F. Davis
    • Robert E. DickersonRichard F. Davis
    • G03C517
    • G03C5/16G03C1/047G03C1/46G03C5/17G03C5/26G03C2001/0055G03C2001/03511G03C2001/03535G03C2001/03564G03C2007/3025G03C2200/27G03C2200/52Y10S430/167Y10S430/168
    • A radiographic silver halide film has reduced yellow dye stain by including a blend of tabular silver halide grains in the emulsion layers. The blend of grains includes blue-sensitive tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;m, and comprise at least 90 mol % bromide and up to 4 mol % iodide, based on total silver halide. Substantially all of the iodide is present in an internal localized portion of the tabular silver halide grains that excludes the surface of the grains. The blend also includes green-sensitive tabular silver halide grains that have an aspect ratio of at least 20, a grain thickness of at least 0.07 &mgr;m, and comprise at least 90 mol % bromide, up to 1.5 mol % chloride, and up to 1.5 mol % iodide, based on total silver halide. The molar ratio of silver in the blue-sensitive silver halide grains to the silver in the green-sensitive silver halide grains is from about 2:1 to about 6:1. The tabular silver halide grains are dispersed in a hydrophilic polymeric vehicle mixture comprising at least 0.5% of oxidized gelatin, based on the total dry weight of the polymeric vehicle mixture in the emulsion layer.
    • 通过在乳剂层中包括片状卤化银颗粒的混合物,放射线状卤化银膜具有减少的黄色染料染色。 颗粒的混合物包括蓝色敏感的片状卤化银颗粒,其长宽比至少为15,颗粒厚度为至少0.1μm,并且包含至少90mol%的溴化物和至多4mol%的碘化物,基于总计 卤化银 基本上所有的碘化物都存在于不排除颗粒表面的片状卤化银颗粒的局部部分内。 共混物还包括长度比至少为20,晶粒厚度至少为0.07微米,并且包含至少90摩尔%溴化物,至多1.5摩尔氯化物和至多1.5摩尔浓度的绿敏感的片状卤化银颗粒 基于总卤化银的摩尔%碘化物。 感蓝卤化银颗粒中的感蓝卤化银颗粒中的银与银的摩尔比为约2:1至约6:1。 片状卤化银颗粒分散在包含至少0.5%氧化明胶的亲水性聚合物载体混合物中,基于乳液层中聚合物载体混合物的总干重。
    • 5. 发明授权
    • Non-linear flash and lightning detection device
    • 非线性闪光和闪电检测装置
    • US06625399B1
    • 2003-09-23
    • US10307583
    • 2002-12-02
    • Richard F. Davis
    • Richard F. Davis
    • G03B1738
    • G01J1/4214G01W1/00Y02A90/14
    • A method and device for detecting and/or photographing unregulated light flash events such as lighting strikes and muzzle flashes during both daylight and night time conditions is disclosed. The present device utilizes a photodiode sensor in conjunction with a photoresistor to control feedback gain of a transimpedance amplifier thereby providing non-linear amplification and therein constant sensitivity to detect an unregulated, omni-directional flash of light and produce an output signal that is input to an analog comparator circuit whereat a predetermined threshold level is set to prevent false triggering of the isolation relays and/or camera shutter. The output from the comparator circuit is input to a timer circuit to produce a signal of sufficient duration to trigger the isolation relay(s) and/or camera shutter. The output signal from the timer circuit is sent to an isolation relays and/or an infrared coded pulse generator depending on the features of the particular associated equipment in order to release the camera shutter or to protect an electronic or electrical device from the damaging effects of the lightning return stroke. In an alternative embodiment the functions of the comparator circuit, the timer circuit and the coded pulse generator are carried out by a programmable logic device such as a mixed signal processor with analog, digital, real time clock and non-volatile RAM capability wherein the lightning event processing functions are incorporated into the program code. In a further embodiment, the coupling circuit is tuned wherein motion of an object is detected. In yet a further embodiment, multiple photosensor arrays are utilized in conjunction with non-linear amplification and computing means to determine the location of flash events and to control associated equipment.
    • 公开了一种用于在白昼和夜间状态下检测和/或拍摄诸如照明罢工和枪口闪烁之类的未调节的闪光事件的方法和装置。 本装置利用光电二极管传感器与光敏电阻结合来控制跨阻放大器的反馈增益,从而提供非线性放大,并具有恒定的灵敏度,以检测未调节的全向闪光,并产生输入到 模拟比较器电路,其中设置预定阈值电平以防止隔离继电器和/或相机快门的错误触发。 来自比较器电路的输出被输入到定时器电路以产生具有足够持续时间的信号以触发隔离继电器和/或相机快门。 取决于特定相关设备的特征,定时器电路的输出信号被发送到隔离继电器和/或红外编码脉冲发生器,以便释放相机快门或者保护电子或电气设备免受损坏的影响 闪电返回中风。 在替代实施例中,比较器电路,定时器电路和编码脉冲发生器的功能由诸如具有模拟,数字,实时时钟和非易失性RAM能力的混合信号处理器的可编程逻辑器件来执行,其中闪电 事件处理功能被并入程序代码中。 在另一实施例中,调谐耦合电路,其中检测到物体的运动。 在又一个实施例中,多个光电传感器阵列结合非线性放大和计算装置使用,以确定闪存事件的位置并控制相关设备。
    • 6. 发明授权
    • Electronics package employing a high thermal performance wedgelock
    • 电子封装采用高热性能楔形锁
    • US5859764A
    • 1999-01-12
    • US806365
    • 1997-02-27
    • Richard F. DavisLawrence S. Mills
    • Richard F. DavisLawrence S. Mills
    • H05K7/14H05K7/20
    • H05K7/1404H05K7/20545
    • A thermally conductive wedgelock having improved thermal conductivity is used to secure a circuit card assembly in a card guide slot formed in a housing of an electronics package. The circuit card assembly has a thermal mounting plate that is used to secure the assembly in the slot. The thermally conductive wedgelock secures the circuit card assembly in the housing and conductively couples heat from the circuit card assembly to the housing by way of the card guide slot. The wedgelock provides a secondary heat path to the card guide slot to housing in addition to the primary heat path through the thermal mounting plate. Apparatus is provide for expanding the wedgelock in the card guide slot to secure the circuit card assembly therein. The thermally conductive wedgelock may be made of copper or other metal having high thermal conductivity. The wedgelock preferably comprises two tapered wedges, and has a guide that prevents rotation between the adjacent wedges.
    • 使用具有改进的导热性的导热楔块将电路卡组件固定在形成在电子封装的壳体中的卡引导槽中。 电路卡组件具有用于将组件固定在槽中的热安装板。 导热楔块将电路卡组件固定在壳体中,并且通过卡引导槽将热量从电路卡组件导电地耦合到外壳。 除了通过热安装板的主要热路之外,楔形锁还提供了卡引导槽到壳体的二次加热路径。 设备用于扩展卡引导槽中的楔形锁定件,以将电路卡组件固定在其中。 导热楔块可以由具有高导热性的铜或其它金属制成。 楔形锁优选地包括两个锥形楔形件,并且具有防止相邻楔块之间旋转的导向件。
    • 9. 发明授权
    • Photographic lightning trigger devices
    • 摄影闪电触发装置
    • US06243242B1
    • 2001-06-05
    • US09544785
    • 2000-04-07
    • Richard F. Davis
    • Richard F. Davis
    • H02H300
    • G01W1/00G01J1/4214
    • A method and device for detecting and photographing unregulated light flash events such as lighting strikes during both daylight and night time conditions is disclosed by detecting the initiation of the lightning stepped leader event of the immediate lightning flash for photographic and detecting activities. The present device utilizes a photodiode sensor in conjunction with a photoresistor to control feedback gain of a transimpedance amplifier to detect an unregulated, omni-directional flash of light and produces an output signal that is input to an analog comparator circuit where a predetermined threshold level is set to prevent false triggering of the isolation relay(s) and/or camera shutter. The output from the comparator circuit is input to a timer circuit to produce a signal of sufficient duration to trigger the isolation relay(s) and/or camera shutter. The output signal from the timer circuit is sent to isolation relays and/or an infrared coded pulse generator depending on the features of the particular camera in order to release the camera shutter or to protect an electronic or electrical device from the damaging effects of the lightning return stroke. In an alternative embodiment the functions of the comparator circuit, the timer circuit and the coded pulse generator are carried out by a programmable logic device such as a mixed signal processor with analog, digital, real time clock and non-volatile RAM capability wherein the lightning event processing functions are incorporated into the program code. The device circuitry is incorporated into a compact enclosure which can be mounted directly onto the camera or, or in the alternative integrated into the camera housing.
    • 通过检测用于摄影和检测活动的立即闪电的闪电阶梯式引导事件的启动来公开用于检测和拍摄未调节的闪光事件(例如在白昼和夜间条件下的照明)的方法和装置。 本装置利用与光敏电阻结合的光电二极管传感器来控制跨阻放大器的反馈增益以检测未调节的全向闪光,并产生输入到模拟比较器电路的输出信号,其中预定阈值电平为 设置为防止隔离继电器和/或相机快门的错误触发。 来自比较器电路的输出被输入到定时器电路以产生具有足够持续时间的信号以触发隔离继电器和/或相机快门。 来自定时器电路的输出信号根据特定摄像机的特征发送到隔离继电器和/或红外编码脉冲发生器,以便释放相机快门或保护电子或电气设备免受闪电的破坏性影响 回程。 在替代实施例中,比较器电路,定时器电路和编码脉冲发生器的功能由诸如具有模拟,数字,实时时钟和非易失性RAM能力的混合信号处理器的可编程逻辑器件来执行,其中闪电 事件处理功能被并入程序代码中。 设备电路被并入紧凑的外壳中,其可以直接安装到相机上,或者可选地集成到相机外壳中。