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公开(公告)号：US3927358A
公开(公告)日：1975-12-16
申请号：US45685774
申请日：1974-04-01
Applicant: NAT RES DEV
CPC classification number: H02K3/28
Abstract: A 3-phase, alternating current, speed-changing electric motor or generator with speed-changing effected by pole-amplitude modification. The machine has a winding layout providing a first pole-number. The second pole-number requires the reversal in polarity of all poles in each negative half wave of a sinusoidal pole-amplitude modulation wave extending the 360* of the winding periphery. Pole-amplitudes, determined by coil-grouping, approximate to the sinusoidal amplitude of the modulation wave at the pole-locations. Pole-locations are substantially equally spaced-apart throughout, but coil-groups at the zero-amplitude positions of the modulation wave may be omitted (so-called ''''phantom'''' coil-groups). Integral coil-group values approximating closely to the sine wave amplitude values at the corresponding pole-locations, are used.
Abstract translation: 三相，交流，变速电动机或发电机，通过极振幅修正实现变速。 机器具有提供第一极数的绕组布局。 第二极数需要在绕组周边的360°延伸的正弦极 - 振幅调制波的每个负半波中的所有极的极性反转。 通过线圈分组确定的极振幅近似于极点处调制波的正弦振幅。 极点位置基本上等间隔开，但调制波的零振幅位置处的线圈组可以省略（所谓的“幻影”线圈组）。 使用近似于相应极点处的正弦波振幅值的积分线圈组值。
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公开(公告)号：US3925824A
公开(公告)日：1975-12-16
申请号：US46858374
申请日：1974-05-09
Applicant: NAT RES DEV
CPC classification number: A61F2/3603 , A61F2/32 , A61F2/34 , A61F2002/3082 , A61F2002/30827 , A61F2002/30828
Abstract: A hip joint prosthesis is provided with a socket member for the acetabular cavity and a cap member for the femoral head, both members being formed with grooves for fixation to exposed cancellous bone in association with gap-filling medium. The cap member has a major-spherical-segment outer bearing surface, and a coaxial cylindrical inner fixation surface with axial and circumferential grooves to receive said medium. The socket member has a spherically shaped inner bearing surface of not more than hemispherical extent to articulate with the cap member, and an outer fixation surface of hemispherical shape with coaxial annular grooves to receive said medium. The socket and cap members can be respectively of metal and plastics material, in which case the socket is of relatively thin, regular hemispherical form; or these materials can be reversed in which case the socket bearing surface is of minor-spherical-segment shape and can be eccentric to its fixation surface to provide greater thickness remote from its mouth.
Abstract translation: 髋关节假体设置有用于髋臼腔的插座构件和用于股骨头的帽构件，两个构件形成有用于与间隙填充介质相关联地固定到暴露的松质骨上的凹槽。 盖构件具有主球形外承载表面和具有轴向和周向凹槽的同轴圆柱形内固定表面，用于接收所述介质。 插座构件具有球形内轴承表面，其不超过半球面程度以与盖构件铰接，并且具有半球形的外固定表面，具有同轴的环形槽以接收所述介质。 插座和盖构件可以分别是金属和塑料材料，在这种情况下，插座是相对薄的，规则的半球形的; 或者这些材料可以颠倒，在这种情况下，承窝表面具有小球形的形状，并且可以偏心于其固定表面，以提供远离其口部的较大厚度。
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公开(公告)号：US3922912A
公开(公告)日：1975-12-02
申请号：US44554974
申请日：1974-02-25
Applicant: NAT RES DEV
Inventor： BRADBURY LESLIE JOHN STANLEY , WAGNER NICHOLAS LIPTAY
Abstract: An anemometer is described in which a pulse of electric current is passed through a first wire to heat gas passing over the wire. Two further wires on either side of the first wire are connected in a bridge circuit to sense the heated gas. The velocity of the gas is indicated by automatically measuring the time between the heating pulse and the sensing of the heated gas by one of the further wires. In order to reduce the effect of signals induced electromagnetically in the sensing wires by the heating pulse an inhibit circuit constructed to introduce as little disturbance as possible, is coupled between the bridge and the time measuring circuits. The inhibit circuit has two paths which are both operative until after the induced pulse has occurred. The outputs from these paths are as far as possible, equal and opposite, and therefore cancel until one path is rendered inoperative before the pulse to be sensed occurs.
Abstract translation: 描述了一种风速计，其中电流脉冲通过第一线以加热通过线的气体。 在桥接电路中连接在第一导线两侧的两条另外的导线以感测加热的气体。 气体的速度通过自动测量加热脉冲和通过其它导线之一感测加热气体之间的时间来指示。 为了通过加热脉冲降低感测线中感应电磁信号的影响，构造为尽可能少地引入干扰的禁止电路被耦合在桥和时间测量电路之间。 禁止电路具有两条路径，直到引发脉冲发生之后才能运行。 来自这些路径的输出尽可能地相等和相反，因此在发生待检测的脉冲之前消除直到一条路径不工作。
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4.发明授权Method of making catalyst having a perovskite structure, the resulting product and uses thereof 失效制备具有钙钛矿结构的催化剂的方法，所得产物及其用途
公开(公告)号：US3922204A
公开(公告)日：1975-11-25
申请号：US13498871
申请日：1971-04-19
Applicant: NAT RES DEV
Inventor： TSEUNG ALFRED CHAN CHUNG , BEVAN HOWARD LYNNE
CPC classification number: B01J23/83 , B01J23/10 , B01J23/16 , H01M4/9016 , Y10S502/525
Abstract: A catalyst material is described having the general formula: (AxB1 x) (C)O3 y AND WHICH HAS A PEROVSKITE STRUCTURE AND THE CATIONS A, B and C are given certain limitations. The catalyst is particularly suited to use in relation to the induction of oxygen in alkaline solution and it has the ability to set up a reversible oxygen electrode potential over a wide range of temperature and oxygen partial pressures.
Abstract translation: 描述了具有以下通式的催化剂材料：（AxB1-x）（C）O3 +/- y，并且具有PEROVSKITE结构和A，B和C的作用被给予一定的限制。 催化剂特别适用于在碱性溶液中诱导氧气，并且能够在宽的温度和氧气分压范围内设置可逆的氧电极电位。
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公开(公告)号：US3917479A
公开(公告)日：1975-11-04
申请号：US42593973
申请日：1973-12-18
Applicant: NAT RES DEV
Inventor： SAYCE IAN GEORGE , HOWIE FRANCIS HENRY
CPC classification number: C03B5/025 , F27B3/06 , F27B3/08 , F27D2003/0087 , F27D2003/0089 , F27D2099/0031 , F27M2001/03
Abstract: The invention concerns a process and furnace by means of which a wide variety of high temperature reactions can be carried out. The furnace is mounted for rotation about a vertical axis and has an exit orifice in its base. Arc or plasma heating means are provided in the roof of the furnace for melting the contents of the furnace so that the molten layer so formed will approximate to a paraboloid of revolution when the furnace is rotated. By controlling the input of material to the furnace, the rate of withdrawal of molten material from an exit orifice in the base of the furnace, and the energy input to the furnace a stable continuous process can be achieved.
Abstract translation: 本发明涉及一种可以进行各种各样的高温反应的方法和炉。 炉子安装成围绕垂直轴线旋转并且在其底部具有出口孔。 电弧或等离子体加热装置设置在炉顶，用于熔化炉的内容物，使得当炉旋转时，如此形成的熔融层将接近于抛物面。 通过控制向炉内的材料的输入，可以实现熔融材料从炉底部的出口孔排出的速率，以及输入炉子的能量稳定的连续过程。
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Patent Agency Ranking
公开(公告)号：US3911902A
公开(公告)日：1975-10-14
申请号：US39071673
申请日：1973-08-23
Applicant: NAT RES DEV
Inventor： DELPY DAVID THOMAS
CPC classification number: A61B5/0215 , A61B5/02154 , A61M2025/0002 , G01L9/0091 , G01L11/00
Abstract: A miniature pressure transducer of particular application in surgery is mounted at the tip of a catheter and operates to cause movement of a liquid-gas interface in a capillary tube in response to pressure on the deformable wall of a liquid-filled reservoir. The interface position is sensed in terms of electrical parameters and communicated through the bore of the catheter to external measurement apparatus.
Abstract translation: 手术中具体应用的微型压力传感器安装在导管的尖端处，并且响应于液体填充的储存器的可变形壁上的压力而使毛细管中的液体 - 气体界面移动。 根据电气参数感测接口位置，并通过导管的孔传送到外部测量装置。
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公开(公告)号：US3901720A
公开(公告)日：1975-08-26
申请号：US33158373
申请日：1973-02-12
Applicant: NAT RES DEV
Inventor： MAJUMDAR AMALENDU JYOTI
IPC: C03C3/04 , C03C3/076 , C03C3/078 , C03C3/083 , C03C3/087 , C03C3/095 , C03C3/112 , C03C13/00 , C04B14/42 , C04B26/10 , C04B28/04
CPC classification number: C03C3/076 , C03C3/04 , C03C3/078 , C03C3/083 , C03C3/087 , C03C3/095 , C03C3/112 , C03C13/00 , C03C13/001 , C03C13/002 , C04B14/42 , C04B26/10 , C04B28/04
Abstract: Fibre reinforced cementitious products are described comprising glass fibrous material distributed throughout a cement matrix, in which the glass is one having per se a degree of alkali resistance such that when tested in the form of an abraded fibre of length 2 1/2 inches and diameter of from 0.4 to 1.0 X 10 3 inches said fibre has a tensile strength of at least 100,000 p.s.i. after treatment with saturated aqueous Ca(OH)2 solution at 100*C. for 4 hours followed by successive washings at ambient temperature with water, then with aqueous hydrochloric acid (1%) for 1 minute, water, acetone, following by drying, said fibre experiencing not more than 10% reduction in diameter during said test. The reinforcement of Portland cement structures by fibres of diameter 0.4 to 1.0 X 10 3 and lengths of up to 4 inches is described. Alkali resistant glasses useful for production of these products comprise the CaO-MgO-Al2O3-SiO2 glasses including those in the anorthite field, silica zirconia glasses, and silica stannic oxide glasses. The products have outstanding durability and impact resistance.
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公开(公告)号：US3897267A
公开(公告)日：1975-07-29
申请号：US8193370
申请日：1970-10-19
Applicant: NAT RES DEV
Inventor： TSEUNG ALFRED CHAN CHUNG , WAN BEATRICE YUCK CHAAN , KING WALTER JOHN
CPC classification number: H01M12/06
Abstract: A galvanic cell is described which is capable of implantation in living tissue. The cell is essentially a metal/oxygen cell and is covered with or encapsulated in a layer of material in the form of an oxygen permeable membrane, the anode and cathode components being separated by a barrier which is relatively impermeable to oxygen and not permeable to larger molecules, such as oxides of the metal, while allowing hydroxyl ions to diffuse through it.
Abstract translation: 描述了能够植入生物体组织中的电池。 电池基本上是金属/氧气电池，并被氧透过膜的形式覆盖或封装在一层材料中，阳极和阴极部件被阻挡层隔开，该屏障对于氧是相对不可渗透的，并且不能渗透到较大的 分子，例如金属的氧化物，同时允许羟基离子扩散通过它。
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公开(公告)号：US3896502A
公开(公告)日：1975-07-29
申请号：US43140274
申请日：1974-01-07
Applicant: NAT RES DEV
Inventor： LENNOX WILLIAM MURDOCH
CPC classification number: A61F2/4202
Abstract: An endoprosthetic ankle joint device is provided including a tibial component in the form of a trough defining a concave surface and a talar component having a generally complementary convex surface which is received in the trough in mutual bearing engagement for articulation about the trough long axis. The concave and convex surfaces can have a cross-sectional profile which is wholly formed by revolution of said long axis, or partly so in the centre with rectilinear end parts, but in either case the included angle of this profile is larger for the concave surface. Also, these surfaces can be cylindrical with the profile curves of the same radius, or the convex surface can be convexly longitudinally curved to allow additional articulation orthogonal to the first articulation. In any case the trough ends provide stability in the longitudinal direction. The components can be secured to their respective bones with gap-filling cement by providing grooved or equivalent formations remote from the bearing surfaces.
Abstract translation: 提供了一种假体内踝关节装置，其包括形成凹面的槽形式的胫骨部件和具有大体上互补的凸起表面的距骨部件，所述胫骨部件被接纳在槽中，以相互承受接合作用以围绕槽长轴线进行铰接。 凹面和凸面可以具有由所述长轴的旋转完全形成的横截面轮廓，或部分地在中心具有直线端部，但是在任一情况下，该轮廓的夹角对于凹面较大 。 此外，这些表面可以是具有相同半径的轮廓曲线的圆柱形，或者凸形表面可以凸形地纵向弯曲，以允许与第一关节正交的附加关节。 在任何情况下，槽端在纵向上提供稳定性。 通过提供远离轴承表面的槽形或等同的结构，可以将间隙填充水泥固定到各自的骨头上。
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公开(公告)号：US3894210A
公开(公告)日：1975-07-08
申请号：US34298173
申请日：1973-03-20
Applicant: NAT RES DEV
Inventor： SMITH GORDON ARTHUR , STEPHENS ROBERT GEORGE
IPC: B23K9/10
CPC classification number: B23K9/1025
Abstract: A method of alternating-current gas-shielded arc welding is described, the method being particularly suitable for welding aluminium, its alloys and similar materials. The method employs an arc current which alternates rapidly in polarity and the mean value of which is varied over relatively long intervals. The current magnitude is preferably increased gradually from zero, held constant and then reduced gradually to zero, with the above mentioned mean value variation superimposed. Apparatus for carrying out the method is described, which includes an inverter using thyristors as active elements to control arc current magnitude and to give the required rapid current reversals.
Abstract translation: 描述了一种交流气体保护电弧焊的方法，该方法特别适用于焊接铝，其合金和类似材料。 该方法采用电弧电流，其极性快速交替，其平均值在较长的间隔内变化。 电流值优选从零开始逐渐增加，保持恒定，然后逐渐减小至零，上述平均值变化叠加。 描述了用于执行该方法的装置，其包括使用晶闸管作为有源元件来控制电弧电流量值并给出所需的快速电流反转的逆变器。
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