公开(公告)号：US3964306A

公开(公告)日：1976-06-22

申请号：US545284

申请日：1975-01-29

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Dah Yu Cheng

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Dah Yu Cheng

IPC分类号： G01M9/06 ,  G01M9/00

CPC分类号： G01M9/065

摘要： A system for measuring momentum flux in a turbulently flowing fluid including a sensing apparatus for dynamically sensing the mainstream and the cross velocity components of the fluid, a transducer operative to provide two electrical output signals representative of the velocity components in the mainstream and in the cross direction, and signal processors to derive the Reynolds stress wave and the Reynolds stress.

摘要翻译： 一种用于测量紊流流体中的动量通量的系统，包括用于动态地感测流体的主流和交叉速度分量的感测装置，可操作地提供代表主流和十字架中的速度分量的两个电输出信号的换能器 方向和信号处理器来导出雷诺应力波和雷诺应力。

公开(公告)号：US3945879A

公开(公告)日：1976-03-23

申请号：US502137

申请日：1974-08-30

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Cyrus C. Haynie ,  Samuel V. Messineo

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Cyrus C. Haynie ,  Samuel V. Messineo

IPC分类号： B64G1/22 ,  E04F21/22 ,  B32B31/00

CPC分类号： E04F21/22 ,  B64G1/22 ,  Y10T156/1744 ,  Y10T428/166

摘要： An apparatus is disclosed for holding a plurality of modular components against a surface. A fixture prepositions the components and a vacuum develops a uniform pressure which presses and holds the fixture and objects against a surface. The surface may be curved, vertical, or overhead and since local load concentrations are avoided, fragile ceramic tiles may be installed using the apparatus.

摘要翻译： 公开了用于将多个模块化部件保持抵靠表面的装置。 组件介绍组件，真空产生均匀的压力，将夹具和物体压靠在表面上。 表面可以是弯曲的，垂直的或顶部的，并且由于避免了局部载荷浓度，所以可以使用该装置来安装脆弱的瓷砖。

公开(公告)号：US3945801A

公开(公告)日：1976-03-23

申请号：US521817

申请日：1974-11-07

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles G. Miller ,  Ralph E. Bartera

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles G. Miller ,  Ralph E. Bartera

IPC分类号： G01N21/75 ,  G01N31/00 ,  G01N1/22 ,  G01N21/26

CPC分类号： G01N31/00 ,  G01N21/75

摘要： A continuous HCl in-air indicator consists of a tube-like element with an inlet end through which a continuous stream of air, containing HCl, enters. The air flows downstream from the inlet end and exits the element's outlet end. Positioned between the element's inlet and outlet ends are first and second spaced apart photoelectric units, which are preferably positioned adjacent the inlet and outlet ends, respectively. Ammonia gas is injected into the air, flowing through the element, at a position between the two photoelectric units. The ammonia gas reacts with the HCl in the air to form ammonium chloride particles. The difference between the outputs of the two photoelectric units is an indication of the amount of HCl in the air stream.

摘要翻译： 连续的HCl空气中的指示器由具有入口端的管状元件组成，通过该入口端连续的含有HCl的空气流进入其中。 空气从入口端下游流出并离开元件的出口端。 位于元件的入口端和出口端之间的是第一和第二间隔开的光电单元，其优选地分别邻近入口端和出口端定位。 在两个光电单元之间的位置，氨气被注入空气中，流过元件。 氨气与空气中的HCl反应形成氯化铵颗粒。 两个光电单元的输出之间的差异是空气流中HCl的量的指示。

公开(公告)号：US3939439A

公开(公告)日：1976-02-17

申请号：US533555

申请日：1974-12-17

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles Elachi

IPC分类号： H01S3/03 ,  H01S3/08

CPC分类号： H01S3/0315

摘要： For use in a waveguide gas laser a capillary tube of glass or ceramic has an inner surface defining a longitudinal capillary opening through which the laser gas flows. At least a portion of the inner surface is corrugated with corrugations or channels with a periodicity .LAMBDA. where .LAMBDA. = 1/2.lambda., .lambda. being the laser gas wavelength. The tube includes a diffused region extending outwardly from the opening. The diffused region of a depth d on the order of 1.lambda. to 3.lambda. acts as a waveguide for the waves, with the corrugations producing distributed feedback. The evanescent component of the waves travelling in the diffused region interact with the laser gas in the opening, gaining energy therefrom, and thereby amplifying the waves travelling in the diffused region, which exit the diffused region, surrounding the opening, as a beam of wavelength .lambda..

摘要翻译： 为了用于波导气体激光器，玻璃或陶瓷的毛细管具有限定激光气体流过的纵向毛细管开口的内表面。 内表面的至少一部分波纹状波纹或具有周期性LAMBDA的通道，其中LAMBDA =1/2λ，λ为激光波长。 管包括从开口向外延伸的扩散区域。 深度为1λ至3λ的扩散区域用作波的波导，波纹产生分布式反馈。 在扩散区域中行进的波的消逝分量与开口中的激光气体相互作用，从中获得能量，从而放大在扩散区域中传播的波，该扩散区域作为波长波束离开扩散区域 lambda。

公开(公告)号：US3938188A

公开(公告)日：1976-02-10

申请号：US501011

申请日：1974-08-27

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles H. Lucas

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Charles H. Lucas

IPC分类号： H03M1/00 ,  H03K13/06

CPC分类号： H03M1/16

摘要： An analog-to-digital converter, finding particular application in a multichannel pulse height analyzer, includes means for digitizing the analog input in two conversion steps. To digitize the input to 13 bits, a 7-bit digital to analog converter (DAC) with a 7-bit up-down counter is used. During the first conversion step which is a coarse conversion, the input, V.sub.I, is compared with the DAC output, V.sub.L and the 7-bits of the counter are set by successive approximation. Thereafter, after settling, the DAC output is driven twice toward V.sub.I. The output of an amplifier of a gain 2.sup.7 is stored after each change of the DAC in one of two storage and hold circuits, depending on the polarity of the amplifier output. Then, the content of the 7-bit counter is transferred to the 7 higher order bits of a 14-bit buffer counter. Then, the fine conversion step is performed by successive approximation. In it the voltage in one of the storage and hold circuits is applied as the input and the difference of the voltages in the two storage and hold circuits is applied to a resistor ladder of the DAC. Then, the 7 bits of the counter are transferred to the 7 lower bits of the buffer counter. Thereafter, it is incremented by one and truncated by one, so that only its 13 higher order bits are read out, as the 13 bit output.

摘要翻译： 在多通道脉冲高度分析仪中找到特定应用的模数转换器包括在两个转换步骤中对模拟输入进行数字化的装置。 要将输入数字化为13位，使用带7位递减计数器的7位数/模转换器（DAC）。 在粗转换的第一转换步骤期间，将输入VI与DAC输出进行比较，VL和计数器的7位通过逐次逼近来设置。 此后，稳定后，DAC输出向VI驱动两次。 根据放大器输出的极性，增益27的放大器的输出在DAC的每次改变之后存储在两个存储和保持电路中的一个中。 然后，将7位计数器的内容传送到14位缓冲计数器的7位高位。 然后，通过逐次逼近执行精细转换步骤。 在其中一个存储和保持电路中的电压被施加作为输入，并且两个存储和保持电路中的电压的差被施加到DAC的电阻梯。 然后，计数器的7位被传送到缓冲计数器的7个较低位。 此后，它被递增1并且被截断1，从而仅读取其13个较高阶比特作为13位输出。

公开(公告)号：US3937387A

公开(公告)日：1976-02-10

申请号：US450500

申请日：1974-03-12

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Aleck B. Featherston ,  Kent P. O'Kelly

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Aleck B. Featherston ,  Kent P. O'Kelly

IPC分类号： B23K20/00 ,  B23K1/20 ,  B23K20/24 ,  B23K35/00 ,  B23K35/36

CPC分类号： B23K35/002 ,  B23K35/3613

摘要： A method of diffusion bonding and fluxless brazing of aluminum containing components, including a method of preparing aluminum containing surfaces for such welding techniques wherein the aluminum surfaces are freed of any aluminum oxide coating and are coated with a polymeric sealer which can be thermally removed leaving essentially no residue, the polymeric sealer being removed in a substantially oxygen-free environment and the aluminum components then being brazed or diffusion bonded without the use of a flux to remove oxide coating.

摘要翻译： 一种含铝组分的扩散粘合和无助焊钎焊的方法，包括一种制备用于这种焊接技术的含铝表面的方法，其中铝表面没有任何氧化铝涂层，并且涂覆有可以热去除的聚合物密封剂，基本上 没有残留物，聚合物密封剂在基本上无氧的环境中被除去，然后铝组分被钎焊或扩散粘合，而不使用助熔剂去除氧化物涂层。

公开(公告)号：US3937212A

公开(公告)日：1976-02-10

申请号：US536761

申请日：1974-12-27

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Cyril Feldstein ,  Jules V. Osher ,  Gilbert W. Lewis ,  Robert H. Silver ,  Edward N. Duran

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Cyril Feldstein ,  Jules V. Osher ,  Gilbert W. Lewis ,  Robert H. Silver ,  Edward N. Duran

IPC分类号： A61B5/11 ,  G01B7/16 ,  A61B5/00

CPC分类号： A61B5/4519 ,  A61B5/1107 ,  G01B7/18 ,  A61B2505/05 ,  A61B2562/0261

摘要： A miniature transducer for sensing muscle displacement substantially consists of a curved beam of high elastic compliance connected at its ends to two prongs. The prongs have sharpened tips which are insertable into the muscle under observation. A sensitive strain gauge is bonded to the beam preferably at the point of greatest curvature. The strain gauge output is directly related to changes in the beam curvature. As the muscle under observation expands the spacing between the prongs increases which decreases the beam curvature. On the other hand, when the muscle contracts the prongs' spacing decreases, thereby increasing the beam curvature.

摘要翻译： 用于感测肌肉位移的微型传感器基本上由其弹性柔顺的弯曲梁组成，其端部连接到两个尖头。 尖头具有尖锐的尖端，可以在观察下插入肌肉。 敏感的应变计优选地在最大曲率点处结合到梁上。 应变计输出与光束曲率的变化直接相关。 当观察到的肌肉扩大时，叉头之间的间距增加，这降低了束弯曲度。 另一方面，当肌肉收缩时，叉的间距减小，从而增加束弯曲度。

公开(公告)号：US4149817A

公开(公告)日：1979-04-17

申请号：US762363

申请日：1977-01-25

申请人： James C. Administrator of the National Aeronautics and Space Administration with respect to an invention of Fletcher ,  Charles G. Miller ,  James B. Stephens

发明人： James C. Administrator of the National Aeronautics and Space Administration with respect to an invention of Fletcher ,  Charles G. Miller ,  James B. Stephens

IPC分类号： F24J2/04 ,  F24J2/07 ,  F24J2/10 ,  F24J2/18 ,  F24J2/42 ,  F24J2/48 ,  F24J2/54 ,  G02B5/10 ,  G02B5/18 ,  F24J3/02 ,  E02D3/04 ,  E01C19/43

CPC分类号： G02B5/10 ,  F24J2/0488 ,  F24J2/07 ,  F24J2/1047 ,  F24J2/1057 ,  F24J2/18 ,  F24J2/42 ,  F24J2/487 ,  F24J2/54 ,  F24J2002/4687 ,  Y02E10/41 ,  Y02E10/44 ,  Y02E10/47

摘要： A fixed, linear, ground-based primary reflector having an extended curved sawtooth-contoured surface covered with a metalized polymeric reflecting material, reflects solar energy to a movably supported collector that is kept at the concentrated line focus of the reflector primary. The primary reflector may be constructed by a process utilizing well-known freeway paving machinery.

摘要翻译： 具有被金属化聚合物反射材料覆盖的延伸的弯曲锯齿状表面的固定的线性地面主反射体将太阳能反射到保持在反射器初级的集中线焦点处的可移动支撑的收集器。 主反射器可以通过使用公知的高速公路铺路机械的方法来构造。

公开(公告)号：US4149521A

公开(公告)日：1979-04-17

申请号：US762362

申请日：1977-01-25

申请人： James C. Administrator of the National Aeronautics and Space Administration with respect to an invention of Fletcher ,  Charles G. Miller ,  James B. Stephens

发明人： James C. Administrator of the National Aeronautics and Space Administration with respect to an invention of Fletcher ,  Charles G. Miller ,  James B. Stephens

IPC分类号： F24J2/04 ,  F24J2/07 ,  F24J2/10 ,  F24J2/18 ,  F24J2/42 ,  F24J2/48 ,  F24J2/54 ,  G02B5/10 ,  G02B5/18 ,  F24J3/02

CPC分类号： G02B5/10 ,  F24J2/0488 ,  F24J2/07 ,  F24J2/1047 ,  F24J2/1057 ,  F24J2/18 ,  F24J2/42 ,  F24J2/487 ,  F24J2/54 ,  F24J2002/4687 ,  Y02E10/41 ,  Y02E10/44 ,  Y02E10/47

摘要： A fixed, linear, ground-based primary reflector having an extended curved sawtooth-contoured surface covered with a metalized polymeric reflecting material, reflects solar energy to a movably supported collector that is kept at the concentrated line focus of the reflector primary. The primary reflector may be constructed by a process utilizing well-known freeway paving machinery. The solar energy absorber is preferably a fluid-transporting pipe. Efficient utilization leading to high temperatures from the reflected solar energy is obtained by cylindrical shaped secondary reflectors that direct off-angle energy to the absorber pipe. To obtain higher temperature levels, refocusing secondary reflectors, that cause a series of discrete spots of highly concentrated solar energy to fall on the fluid-transporting pipe, are utilized. A seriatim arrangement of cylindrical secondary reflector stages and spot-forming reflector stages produces a high temperature solar energy collection system of greater efficiency.

摘要翻译： 具有被金属化聚合物反射材料覆盖的延伸的弯曲锯齿状表面的固定的线性地面主反射体将太阳能反射到保持在反射器初级的集中线焦点处的可移动支撑的收集器。 主反射器可以通过使用公知的高速公路铺路机械的方法来构造。 太阳能吸收器优选为流体输送管。 从反射的太阳能导致高温的高效利用是通过将偏角能引导到吸收管的圆柱形二次反射器获得的。 为了获得更高的温度水平，使用引起高浓度太阳能的一系列离散点落在流体输送管上的二次反射器被重新聚焦。 圆柱形二次反射器级和点形成反射器级的串联布置产生更高效率的高温太阳能收集系统。

公开(公告)号：US4137365A

公开(公告)日：1979-01-30

申请号：US779883

申请日：1977-03-21

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Theodore J. Wydeven, Jr. ,  John R. Hollahan

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Theodore J. Wydeven, Jr. ,  John R. Hollahan

IPC分类号： B05D5/00 ,  B05D7/02 ,  B05D7/24 ,  B29D11/00 ,  C08J7/00 ,  C08J7/04 ,  C08J7/18 ,  C09D4/00 ,  B05D3/06

CPC分类号： B05D1/62 ,  B29D11/00865 ,  C08J7/18 ,  C09D4/00 ,  B05D2201/00 ,  Y10T428/31507 ,  Y10T428/31663 ,  Y10T428/31667

摘要： The abrasion resistance of plastic surfaces coated with polymerized organosilanes can be significantly improved by post-treatment of the polymerized silane in an oxygen plasma. For optical purposes, the advantages of this post-treatment are developed with a transparent polycarbonate resin substrate coated with plasma polymerized vinyltrimethoxysilane.

摘要翻译： 通过在氧等离子体中后处理聚合的硅烷，可以显着改善涂覆有聚合有机硅烷的塑料表面的耐磨性。 为了光学目的，这种后处理的优点是用涂覆有等离子体聚合的乙烯基三甲氧基硅烷的透明聚碳酸酯树脂基材开发的。