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81 条记录 (耗时 0.025 秒)

    Method of, and apparatus for, producing castings in a vacuum
    1.
    发明授权
    Method of, and apparatus for, producing castings in a vacuum 失效
    在真空中生产铸件的方法和设备

    公开(公告)号：US4541475A

    公开(公告)日：1985-09-17

    申请号：US451197

    申请日：1982-12-20

    申请人： John Goddard ,  David Mills ,  Alan J. Moulden

    发明人： John Goddard ,  David Mills ,  Alan J. Moulden

    IPC分类号： B22D23/10 ,  B22D27/15 ,  C30B11/00 ,  B22D18/00

    CPC分类号： B22D27/15 ,  B22D23/10 ,  C30B11/00 ,  C30B29/52

    摘要： Apparatus for casting in a vacuum has a single evacuable furnace chamber 10 in which the charge melting and mould heating takes place. The charge is melted in a crucible 24 by an induction coil 20, while the mould is heated by resistance heaters 18 which are made from a FECRALLOY (Registered Trade Mark) material and can be operated in air or vacuum. In operation an empty mould 16 and a charged crucible 24 are positioned in the furnace 14 and the furnace chamber is sealed. The heaters 20 and 18 are operated while the furnace is pumped down. A control device 40 ensures that the charge is not melted until the appropriate vacuum level has been reached. After pouring the filled mould is withdrawn into a withdrawal zone 25 and as soon as the casting has solidified to the extent that air can be admitted to the chamber without detriment, the vacuum is released and the mould and charge replaced. The furnace described is relatively inexpensive, having no water cooled valves between chambers, and the process is relatively quick and inexpensive due to the heating of the mould during evacuation of the chamber.

    摘要翻译： 用于在真空中铸造的装置具有单个可抽出的炉室10，其中发生电荷熔融和模具加热。 通过感应线圈20将电荷熔化在坩埚24中，同时通过由FECRALLOY（注册商标）材料制成的电阻加热器18加热模具并且可以在空气或真空中操作。 在操作中，将空模16和带电的坩埚24定位在炉14中，并且将炉室密封。 加热器20和18在炉子被抽出的同时操作。 控制装置40确保在达到适当的真空度之前电荷不被熔化。 在将填充的模具倒出之后，将其注入到退避区域25中，一旦铸件凝固到空气可以进入腔室而没有损害的程度，则释放真空并且更换模具和电荷。 所描述的炉子相对便宜，在室之间没有水冷阀，并且由于在抽空室内的模具的加热，该方法相对快速和便宜。

    Method of manufacture of articles with internal passages therein and articles made by the method
    2.
    发明授权
    Method of manufacture of articles with internal passages therein and articles made by the method 失效
    具有内部通道的制品的制造方法和通过该方法制造的制品

    公开(公告)号：US4416321A

    公开(公告)日：1983-11-22

    申请号：US280213

    申请日：1981-07-06

    申请人： John Goddard ,  David Mills

    发明人： John Goddard ,  David Mills

    IPC分类号： B22C9/04 ,  B22D27/04 ,  B22D23/06

    CPC分类号： B22C9/04 ,  B22D27/045

    摘要： In casting of hollow turbine blades problems arise with breakage or distortion of long thin cores for small diameter cooling passages, and also in maintaining cores accurately positioned for casting thin walled blades. The present invention provides a method of manufacture in which a pre-form of the blade, or other hollow article, is made in two parts and is accurately machined to define the required passage shapes or wall thicknesses in at least one of the parts, appropriate cores are made and the pre-form parts are assembled in a casting mould with the cores in position and heated to melt the preforms. Thus the cores are supported by solid material during the melting process. The melting can take place progressively in a uni-directional manner along the article so that only a narrow area of the article becomes melted at any time and the cores are supported in the melt from both ends. Thus columnar grained or single crystal articles can be made by this method. The method can also be used to produce blind-ended holes in a cast article.

    摘要翻译： 在中空涡轮机叶片的铸造中，由于用于小直径冷却通道的长的细芯的断裂或变形以及用于铸造薄壁叶片的精确定位的芯子，存在问题。 本发明提供了一种制造方法，其中叶片或其它中空制品的预成型件制成两部分并且被精确加工以在至少一个部件中限定所需的通道形状或壁厚，适当的 制造芯部，并且将预成型部件组装在铸造模具中，使芯部在适当位置并被加热以熔化预制件。 因此，芯在熔化过程中由固体材料支撑。 熔化可以沿着制品以单向方式逐渐进行，使得只有制品的狭窄区域随时熔化并且芯部从两端支撑在熔体中。 因此，可以通过该方法制造柱状晶粒或单晶制品。 该方法也可用于在铸造制品中产生盲孔。

    Solar Absorptive Material For a Solar Selective Surface Coating
    7.
    发明申请
    Solar Absorptive Material For a Solar Selective Surface Coating 有权
    太阳能吸收材料用于太阳能选择性表面涂层

    公开(公告)号：US20090151777A1

    公开(公告)日：2009-06-18

    申请号：US11817667

    申请日：2006-03-03

    申请人： Yongbai Yin ,  Lingxia Hang ,  David Mills

    发明人： Yongbai Yin ,  Lingxia Hang ,  David Mills

    IPC分类号： H01L31/00

    CPC分类号： F24S70/25 ,  Y02E10/40 ,  Y10S126/907 ,  Y10S126/908 ,  Y10T428/12056 ,  Y10T428/12458 ,  Y10T428/12528 ,  Y10T428/12611 ,  Y10T428/131 ,  Y10T428/1317

    摘要： The present invention provides a solar absorptive material for a solar selective surface of an absorber of solar radiation. The solar absorptive material comprises a dispersed metallic material and a receiving the top surface boundary through which the solar radiation is received. Further, the solar absorptive material comprises a first region and a second region. The first region being located at a position closer to the receiving boundary than the second region and the first region has an average volume fraction of the dispersed metallic material that is larger than that of the second region.

    摘要翻译： 本发明提供一种用于太阳辐射吸收体的太阳能选择表面的太阳能吸收材料。 太阳能吸收材料包括分散的金属材料和接收太阳辐射通过其接收的顶表面边界。 此外，太阳能吸收材料包括第一区域和第二区域。 所述第一区域位于比所述第二区域更靠近所述接收边界的位置，并且所述第一区域具有大于所述第二区域的分散金属材料的平均体积分数。

    Pulse width modulated solenoid
    8.
    发明申请
    Pulse width modulated solenoid 审中-公开
    脉宽调制电磁铁

    公开(公告)号：US20080185546A1

    公开(公告)日：2008-08-07

    申请号：US11807482

    申请日：2007-05-29

    申请人： David Mills ,  Ryan True ,  Aaron Biefer

    发明人： David Mills ,  Ryan True ,  Aaron Biefer

    IPC分类号： F16K31/02

    CPC分类号： F16K31/0665 ,  F16K31/0668

    摘要： A pulse width modulated solenoid control valve is described, wherein the valve includes a polymer fluid control body. The body includes a segmented fluid flow path for providing strength to the fluid control body assembly. Stand off ribs are provided to improve assembly into a control manifold. A casing forms an integral flux tube. A tapered push rod is used to reduce flux shorting.

    摘要翻译： 描述了脉宽调制电磁控制阀，其中阀包括聚合物流体控制体。 主体包括用于向流体控制主体组件提供强度的分段流体流动路径。 提供支撑肋以改进组装成控制歧管。 套管形成整体的通量管。 锥形推杆用于减少通量短路。

    Method for dynamically adapting radio signal strength threshold level in a subscriber radio based upon site type preference
    9.
    发明申请
    Method for dynamically adapting radio signal strength threshold level in a subscriber radio based upon site type preference 审中-公开
    基于站点类型偏好在用户无线电中动态地适应无线电信号强度阈值水平的方法

    公开(公告)号：US20060058030A1

    公开(公告)日：2006-03-16

    申请号：US10939396

    申请日：2004-09-13

    申请人： Elizabeth Stephens ,  Kenneth Luippold ,  David Mills

    发明人： Elizabeth Stephens ,  Kenneth Luippold ,  David Mills

    IPC分类号： H04Q7/20

    CPC分类号： H04W52/12 ,  H04W52/288

    摘要： A method for dynamically adapting a radio signal strength indicator (RSSI) threshold level of a subscriber radio in two-way radio communications includes determining pre-assigned subsystem site type (211) by a subscriber radio upon attempted registration with a subscriber radio subsystem site. The RSSI threshold level within the subscriber radio is then dynamically adjusted based on the subsystem site type. A predefined set of operational criteria is used by the subscriber radio to identify each subsystem site type and maintain predefined communication standards by either remaining within the subscriber radio subsystem site or being excluded from the subscriber radio subsystem site.

    摘要翻译： 用于在双向无线电通信中动态地适应用户无线电的无线电信号强度指示符（RSSI）阈值级别的方法包括：在用户无线电子系统站点尝试注册时，通过用户无线电确定预先分配的子系统站点类型（211）。 然后，基于子系统站点类型动态地调整用户无线电中的RSSI阈值水平。 用户无线电使用预定义的一组操作标准来识别每个子系统站点类型并且通过剩余在订户无线电子系统站点内或被从用户无线电子系统站点排除而维持预定义的通信标准。

    Acoustic backing material for small-element ultrasound transducer arrays
    10.
    发明申请
    Acoustic backing material for small-element ultrasound transducer arrays 审中-公开
    用于小元件超声波换能器阵列的声学背衬材料

    公开(公告)号：US20050127793A1

    公开(公告)日：2005-06-16

    申请号：US10737216

    申请日：2003-12-15

    申请人： Charles Baumgartner ,  David Mills

    发明人： Charles Baumgartner ,  David Mills

    IPC分类号： A61B8/00 ,  B06B1/02 ,  G10K11/00 ,  G10K11/165 ,  H01L41/08

    CPC分类号： G10K11/002

    摘要： A fine-pitch acoustic transducer array that has a backing made of acoustically attenuative material. The backing material is prepared by homogeneously combining a matrix component and filler components having an average particle size less than one-fifth (preferably less than one-tenth) of the smallest dimension of the elements making up the array. In certain embodiments, the acoustically attenuative material comprises 25-45 wt. % tungsten particles, 15-35 wt. % silicone particles and 40-60 wt. % epoxy.

    摘要翻译： 具有由声衰减材料制成的背衬的细间距声换能器阵列。 通过均匀组合基质组分和平均粒径小于构成阵列的元素的最小尺寸的五分之一（优选小于十分之一）的填料组分来制备背衬材料。 在某些实施方案中，声学减弱材料包含25-45wt。 ％钨颗粒，15-35重量％ ％硅氧烷颗粒和40-60重量％ ％环氧树脂。