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31.发明授权
公开(公告)号：US3767611A
公开(公告)日：1973-10-23
申请号：US3767611D
申请日：1972-02-10
Applicant: NAT RES DEV
Inventor： PARKER B
CPC classification number: C08J5/24 , C08J2365/00 , Y10T428/2918 , Y10T442/2984
Abstract: A PROCESS OF PRODUCTING A SOLUBLE FUSIBLE PRE-POLYMER IS DESCRIBED IN WHICH AT LEAST ONE OF TOLUENE AND XYLENE IS REACTED WITH P-XYLYLENEGLYCOL DIMETHYL ETHER IN THE PRESENCE OF A MILD FRIEDEL-CRAFTS TYPE CATALYST SO THAT THE TOLUENE AND/OR XYLENE REACT WITH THE P-XYLYLENEGLYCOL DIMETHYL ETHER WITH THE ELIMINATION OF METHANOL, THE REACTION BEING ALLOWED TO PROCEED ALMOST TO THE GELATION POINT. THE PRE-POLYMERS PRODUCED ARE PARTICULARLY SUITABLE FOR MAKING CARBON FIBRE REINFORCED PLASTICS MATERIALS.
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公开(公告)号：US3764009A
公开(公告)日：1973-10-09
申请号：US3764009D
申请日：1973-01-31
Applicant: NAT RES DEV
Inventor： WATT J
IPC: G01N33/487 , B03D3/02
CPC classification number: G01N33/487
Abstract: In the fractionation of liquid proteins, an increased rate of producton without denaturing is obtained by use of apparatus including (A) A HEAT-EXCHANGER FOR THROUGHFLOW OF A COOLING FLUID WHEREBY THE HEAT-EXCHANGER PRESENTS COOLING SURFACING FOR CONTACT BY A THROUGHFLOWING LIQUID; AND (B) A PAIR OF NOZZLES FOR DISCHARGING RESPECTIVELY JETS OF PROTEINACEOUS SOLUTION AND LIQUID PRECIPITANT, THE NOZZLES BEING SO DISPOSED THAT THE JET LIQUIDS CONVERGINGLY MERGE TO FORM A COMPOSITE STREAM WHICH IMPINGES ON THE COOLING SURFACING OF THE HEAT EXCHANGER AND INSTANTLY ON IMPINGEMENT BECOMES A REACTION MIXTURE CONTAINING THE PRECIPITATED PROTEIN FRACTION WHICH REACTION MIXTURE THEN FLOWS OVER THE COOLING SURFACING AND FROM THE HEAT EXCHANGER.
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公开(公告)号：US3763983A
公开(公告)日：1973-10-09
申请号：US3763983D
申请日：1972-03-21
Applicant: NAT RES DEV
Inventor： JAMES A
CPC classification number: G07F17/145 , G07F11/66 , Y10T83/2209 , Y10T83/4443 , Y10T83/4544 , Y10T83/461 , Y10T83/5833
Abstract: A ticket system for public transport vehicles based on the use of tickets which require to be of a predetermined length when presented for checking as the passenger leaves the vehicle, this length being determined on issue of the ticket by mechanism which allows for the issue point in relation to the complete journey and also in accordance with the fare paid: thus all tickets checked at any particular point should be of the same length irrespective of their several issue points, and any short ticket indicates short payment.
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公开(公告)号：US3762371A
公开(公告)日：1973-10-02
申请号：US3762371D
申请日：1972-06-23
Applicant: NAT RES DEV
Inventor： JOSHUA CREER QUAYLE , GREATRIX G
CPC classification number: A01J7/00 , A01J5/0133 , A01J5/041
Abstract: Apparatus and methods for comparing the conductivities of liquid streams by induction are described. Such apparatus and methods have particular application in detecting mastitis in milk animals where differences in the conductivities of milk streams from different teats of the same animal may indicate the presence of mastitis. The apparatus described is specially suited for use with milking machinery in that it is economical to manufacture and is easy to keep clean. In one embodiment four coils are provided one for each of four conductivity measuring cells in a hemispherical chamber in the claw piece of milking apparatus.
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公开(公告)号：US3757394A
公开(公告)日：1973-09-11
申请号：US3757394D
申请日：1970-12-09
Applicant: NAT RES DEV
Inventor： TURNER D
CPC classification number: F16L33/08 , Y10T24/1427 , Y10T24/1445
Abstract: A band clip includes a rotatably mounted screw which meshes wormwise with a threaded portion of the band. The screw is provided with a frusto-conical portion and the mounting for the screw presents an inclined surface which co-operates with the frusto-conical portion in such a way that, when the band is in an operative condition, co-action between the frusto-conical portion and the inclined surface biases the screw into engagement with the threaded portion of the band.
Abstract translation: 带夹包括可旋转地安装的螺钉，其与带的螺纹部分蠕动地啮合。 螺钉设置有截头圆锥形部分，并且用于螺钉的安装件呈现出与截头圆锥形部分配合的倾斜表面，使得当带处于操作状态时， 截头圆锥形部分和倾斜表面将螺钉偏压成与带的螺纹部分接合。
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Patent Agency Ranking
公开(公告)号：US3753102A
公开(公告)日：1973-08-14
申请号：US3753102D
申请日：1970-12-11
Applicant: NAT RES DEV
Inventor： BECK M
Abstract: Electrostatic charge is detected in a turbulently flowing material by arranging an electrode so that there is induced on it a potential dependent on the charge concentration in the material, and sensing the magnitude of the alternating component of the induced potential due to the turbulence.
Abstract translation: 在湍流材料中通过布置电极来检测静电荷，使得在其上感应到取决于材料中的电荷浓度的电位，并且感测由于湍流引起的感应电位的交替分量的大小。
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37.发明授权Determination of the mean size of solid particles contained in a fluid by scattering of x-radiation 失效通过X射线散射测定流体中含有的固体颗粒的平均尺寸
公开(公告)号：US3749910A
公开(公告)日：1973-07-31
申请号：US3749910D
申请日：1970-09-28
Applicant: NAT RES DEV
Inventor： CARR BRION K , BRAMWELL S
IPC: G01N23/201 , G01N23/12
CPC classification number: G01N23/201
Abstract: When electromagnetic radiation is passed through a heterogeneous material such as a slurry or suspension, part of the radiation will be scattered by the suspending medium and part by the solid particles contained in said medium. If, for example, the radiation used is X-radiation, and if the suspending medium consists of a relatively low atomic number material while the particles consist of a relatively high atomic number material, then due to the fundamental properties of scattered X-rays the bulk of the Compton or modified scattered X-rays will come from the suspending medium, and the Rayleigh or unmodified scattering will come both from the particles and the suspending medium. If the X-ray energy is suitable, the Rayleigh scattering will be independent of the size of the particles, but the Compton scattering will be markedly dependent on the size of the particles. Comparison of the Compton scattering or of the Rayleigh and Compton scattering provides a measure of the size of the solid particles.
Abstract translation: 当电磁辐射通过诸如浆料或悬浮液的不均匀材料时，部分辐射将被悬浮介质和部分被包含在所述介质中的固体颗粒散射。 例如，如果使用的辐射是X射线，并且如果悬浮介质由相对低的原子序数材料组成，而颗粒由相对高的原子序数材料组成，则由于散射X射线的基本特性， 康普顿或修饰的散射X射线的大部分将来自悬浮介质，并且瑞利或未改性的散射将来自颗粒和悬浮介质。 如果X射线能量是合适的，瑞利散射将不依赖于粒子的大小，但康普顿散射将明显取决于粒子的大小。 康普顿散射或瑞利和康普顿散射的比较提供了固体颗粒尺寸的量度。
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公开(公告)号：US3744632A
公开(公告)日：1973-07-10
申请号：US3744632D
申请日：1970-12-03
Applicant: NAT RES DEV
Inventor： MOZLEY R
CPC classification number: D04H1/655 , A01G31/001 , A01G2031/005 , B03B5/08 , D04H1/64 , D06M15/41
Abstract: Apparatus for the treatment of ores and other solid materials containing fractions of different density comprises a conveyor surface for conveying a suspension of the material upwardly against a downward flow of wash liquid, and shaking means for imparting a shaking motion to the surface to facilitate separation of the fractions contained in the material. In different embodiments, the apparatus comprises (a) washing means for supplying wash liquid to the surface in a dropwise fashion from above the surface at a series of positions spaced across the surface transversely to the direction in which the material is conveyed by the surface, (b) means for feeding the material on to the surface along each of those two sides thereof which are disposed in the general direction in which the material is conveyed by the surface (c) means for imparting a first orbital shaking motion to the surface to facilitate the initial separation of the fractions contained in the material and means for imparting a second orbital shaking motion to the surface of higher amplitude and/or lower frequency than the first to facilitate discharge of the lighter fractions from the surface.
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公开(公告)号：US3742263A
公开(公告)日：1973-06-26
申请号：US3742263D
申请日：1971-04-19
Applicant: NAT RES DEV
Abstract: A device for injecting electric charge into fluids consists of a p-n junction diode having the junctions so positioned that an active region of the semi-conductor is in contact with the fluid. A reverse electric field of a magnitude sufficient to release charge carriers having energies greater than the potential barrier at the surface of the semi-conductor is applied to the junction so that charge carriers are emitted from the active region. An electrode is also immersed in the fluid to enable a drift field to be established to attract charge carriers in the fluid away from the surface of the semi-conductor.
Abstract translation: 用于将电荷注入流体的装置由p-n结二极管组成，该p-n结二极管具有如此定位使得半导体的有源区与流体接触的结。 足以释放具有大于半导体表面处的势垒的能量的电荷载流子的反向电场被施加到结，使得电荷载流子从有源区发射。 电极也浸没在流体中以使得能够建立漂移场以吸引流体中的电荷载体远离半导体的表面。
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公开(公告)号：US3742146A
公开(公告)日：1973-06-26
申请号：US3742146D
申请日：1970-10-20
Applicant: NAT RES DEV
Abstract: The recognition of signals having specific periods is described particularly in relation to recognising vowels. Characteristic frequencies in vowels are recognised by circuits which delay the input signals for an interval related to a frequency to be recognised, correlate the delayed signals with undelayed input signals and integrate the resultant over a short period comparable with the duration of the vowel sound. The magnitude and sign of the integrated signal indicates whether the required signal is present. In order to deal with speech an incoming signal is first passed to a special form of AGC circuit and then divided into low and high frequency components. The presence of characteristic frequencies in these components is determined by the technique described above, and logic circuits indicate what combinations of frequencies and thus what vowels are present.
Abstract translation: 关于具有特定周期的信号的识别特别涉及识别元音。 元音中的特征频率由延迟输入信号与待识别频率相关的间隔的电路识别，将延迟的信号与未延迟的输入信号相关，并将结果与元音的持续时间相比较。 积分信号的幅度和符号表示是否存在所需的信号。 为了处理语音，输入信号首先传递到AGC电路的特殊形式，然后分为低频和高频分量。 这些分量中的特征频率的存在由上述技术确定，并且逻辑电路指示频率的组合以及因此存在什么元音。
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