公开(公告)号：US3851238A

公开(公告)日：1974-11-26

申请号：US40999173

申请日：1973-10-26

Applicant: NASA

Inventor： FLETCHER J ,  BURDIN C

IPC: H02P5/52 ,  H02P5/46

CPC classification number: H02P5/56

Abstract: A phase lock servo system for synchronizing the rotation of a slip ring assembly with the rotation of an air bearing table so that a minimum of torque will be imparted through cables extending from the slip ring assembly to the air bearing table as such is rotated. The system includes two servo loops. The first servo loop includes a rate gyroscope carried on the air bearing table which generates a signal through a summing junction to be compared with a signal coming from a tachometer coupled to the slip ring assembly. The corrective signal is applied to a torque motor for rotating the slip ring assembly. The second servo loop includes a pair of photo detector cells which generate pulses responsive to the rotation of the air bearing table and slip ring assembly which are fed through a phase detector, and a variable gain amplifier to the summing junction circuit to provide a fine adjustment for rotating the slip ring assembly.

Abstract translation: 一种锁相伺服系统，用于使滑环组件的旋转与空气轴承工作台的旋转同步，使得通过从滑环组件延伸到空气轴承工作台的电缆转动时，可以赋予最小的扭矩。 该系统包括两个伺服回路。 第一伺服回路包括承载在空气轴承台上的速率陀螺仪，其通过加法结产生信号以与来自联接到滑环组件的转速计的信号进行比较。 校正信号被施加到用于旋转滑环组件的扭矩电动机。 第二伺服回路包括一对光检测器单元，其产生响应于通过相位检测器馈送的空气轴承工作台和滑环组件的旋转的脉冲，以及可变增益放大器到求和结电路以提供微调 用于旋转滑环组件。

公开(公告)号：US3846243A

公开(公告)日：1974-11-05

申请号：US28190872

申请日：1972-08-18

Applicant: NASA

Inventor： FLETCHER J ,  FURNER R

IPC: C12Q1/26 ,  G01N33/53 ,  G01N33/94 ,  C12K1/00

CPC classification number: C12Q1/26 ,  G01N33/5308 ,  G01N33/9486 ,  Y10T436/202499

Abstract: 1. A METHOD FOR CONTINUOUS-FLOW ANALYSIS OF OXIDATIVE METABOLITES OF AROMATIC AMINES AND OF COMPOUNDS WHICH PRODUCE FORMALDEHYDE ON OXIDATIVE DEALKYLATION CONSISTING ESSENTIALLY OF THE STEPS OF: (1) COMBINING A FLUID STREAM COMPRISING A SUBSTRATECOFACTOR A PHOSPHATE BUFFER WITH A RAT LIVER HOMOGENATE COMPRISING OXIDATIVE MICROSOMAL ENZYMES, (2) DIVIDING THE RESULTING MIXTURE INTO A FIRST STREAM FOR DETERMING THE QUANTITY OF PROTEIN AND INTO A SECOND STREAM FOR METABOLIZING THE SUBSTRATE AND FOR DETERMINING THE QUANTITY OF METALBOLITE GENERATED DURING SUCH METABOLISM, (3) DILUTING SAID FIRST STREAM WITH PHOSPHATE BUFFER, (4) AERATING SAID DILUTED FIRST STREAM, (5) REACTING SAID AERATED FIRST STREAM WITH A COLOR FORMING REAGENT FOR PROTEIN, (6) COLORIMETRICALLY DETERMINING THE AMOUNT OF PROTEIN, (7) INTERMITTENTLY ADDING SMALL ALIQUOTS OF 100% OXYGEN TO SAID SECOND STREAM, (8) INCUBATING SAID OXYGENATED SECOND STREAM AT A CONTROLLED TEMPERATURE TO PROMOTE THE FORMATION OF METABOLITE BY ENZYME ACTION ON SAID SUBSTRATE, (9) DIALYZING SAID SECOND STREAM AGAINST PHOSPHATE BUFFER, AND (10) COLORIMETRICALLY DETERMINING THE CONCENTRATION OF METABOLITE AFTER REACTING THE DIALSATE WITH A COLOR FORMING REAGENT FOR SAID METABOLITE.

公开(公告)号：US3835318A

公开(公告)日：1974-09-10

申请号：US35712673

申请日：1973-05-04

Applicant: NASA

Inventor： FLETCHER J ,  YEAGER P ,  GAETANO G ,  HUGHES D

IPC: H01J49/02 ,  H01J39/34

CPC classification number: H01J49/022

Abstract: A high-speed scan device that allows most any scanning sector mass spectrometer to measure preselected gases at a very high sampling rate. The device generates a rapidly changing staircase output which is applied to the accelerator of the spectrometer and it also generates defocusing pulses that are applied to one of the deflecting plates of the spectrometer which when shorted to ground deflects the ion beam away from the collector. A defocusing pulse occurs each time there is a change in the staircase output.

Abstract translation: 一种高速扫描装置，允许大多数扫描扇区质谱仪以非常高的采样速率测量预选气体。 该装置产生快速变化的阶梯输出，其被施加到光谱仪的加速器，并且还产生散焦脉冲，该散焦脉冲施加到光谱仪的偏转板之一，当与地面短路时，将离子束偏离收集器。 每次楼梯输出发生变化时都会发生散焦脉冲。

公开(公告)号：US3827807A

公开(公告)日：1974-08-06

申请号：US29372572

申请日：1972-09-29

Applicant: NASA

Inventor： FLETCHER J ,  GUTSHALL R ,  MC CONAUGHEY R ,  VOLPE F

IPC: G01S3/781 ,  G01S3/789 ,  G01B11/26

CPC classification number: G01S3/789 ,  G01S3/781

Abstract: A star scanner on a spin stabilized spacecraft includes a reticle with a pair of slits having different separations as a function of the spacecraft vertical plane, to form a ''''V'''' slit. The time between a star image crossing one of the slits relative to a reference telemetry time provides an indication of azimuth angle. The time between the image crossing the two slits provides an indication of elevation angle of the star. If a star cluster is detected such that two stars pass the slits in less time than normally required for a single star to cross the two slits, an indication of the cluster occurrence is derived. Means are provided to prevent effective detection of large celestial bodies, such as the sun or moon.

Abstract translation: 旋转稳定的航天器上的星形扫描器包括具有作为飞船垂直平面的函数的具有不同分离的一对狭缝的掩模版，以形成“V”缝。 相对于参考遥测时间跨越狭缝之一的星形图像之间的时间提供了方位角的指示。 跨过两个狭缝的图像之间的时间提供了星的仰角的指示。 如果检测到星团，使得两颗星在比单个星穿过两个狭缝通常所需的时间更短的时间内通过狭缝，则导出簇发生的指示。 提供了防止有效检测诸如太阳或月亮的大型天体的装置。

公开(公告)号：US3821102A

公开(公告)日：1974-06-28

申请号：US25817172

申请日：1972-05-31

Applicant: NASA

Inventor： FLETCHER J ,  GRIFFIN R ,  MC CREIGHT L

IPC: G01N27/447 ,  B01K5/00

CPC classification number: G01N27/44756

Abstract: A zero-g, constant-flow electrophoretic separating apparatus comprising a deflecting member to spread carrier fluid across a conduit, separation electrodes spaced apart along the conduit, and an end wall with a valve located in the conduit past the separation electrodes from which layers of carrier and sample may be extracted. Electrode electrolyte is separated from the carrier and continually circulated and cleaned.

公开(公告)号：US3814083A

公开(公告)日：1974-06-04

申请号：US25631772

申请日：1972-05-24

Applicant: NASA

Inventor： HOFFLER G ,  WOLTHUIS R ,  FLETCHER J ,  GOLDEN D

IPC: A61B5/022 ,  A61B7/04 ,  A61B5/02

CPC classification number: A61B5/02208 ,  A61B7/045

Abstract: A Korotkov sound processor is disclosed which is used in a noninvasive, automatic blood pressure measuring system wherein the brachial artery is occluded by an inflatable cuff. The Korotkoff sound associated with the systolic event is determined when the ratio of the absolute value of a voltage signal representing Korotkov sounds in the range of 18-26 Hz to a maximum absolute peak value of the unfiltered signals first equals or exceeds a value of 0.45. The Korotkov sound associated with the diastolic event is determined when a ratio of the voltage signal of the Korotkov sounds in the range of 40 to 60 Hz to the absolute peak value of such signals within a single measurement cycle first falls below a value of 0.17. The processor signals the occurrence of the systolic and diastolic events and these signals can be used to control a recorder to record pressure values for these events.

Abstract translation: 公开了一种Korotkov声音处理器，其用于非侵入式自动血压测量系统，其中肱动脉被可膨胀的袖带阻塞。 当表示Korotkov的电压信号的绝对值在18-26Hz的范围内的声音与未滤波信号的最大绝对峰值的比率首先等于或超过0.45的值时，确定与心脏收缩事件相关的Korotkoff声音 。 当Korotkov的电压信号在40至60Hz的范围内的声音与单个测量周期内的这种信号的绝对峰值的比值首先下降到0.17以下时，确定与舒张期事件相关的Korotkov声音。 处理器指示收缩和舒张事件的发生，并且这些信号可用于控制记录器记录这些事件的压力值。

公开(公告)号：US3810829A

公开(公告)日：1974-05-14

申请号：US26691372

申请日：1972-06-28

Applicant: NASA

Inventor： FLETCHER J ,  OLIVER G

IPC: C25D5/02 ,  C25D5/08 ,  C25D21/12 ,  B01K3/00 ,  B23P1/00

CPC classification number: C25D5/026 ,  C25D5/08 ,  C25D21/12

Abstract: A PLATING SYSTEM IS DISCLOSED WHEREIN A SUBSTRATE TO BE PLATED IS SUPPORTED ON A STATIONERY PLATFORM. A NOZZLE ASSEMBLY WITH A SMALL NOZZLE IS SUPPLIED WITH A PLATING SOLUTION UNDER HIGH PRESSURE, SO THAT A CONSTANT-FLOW STREAM OF SOLUTION IS DIRECTED TO THE SUBSTRATE. THE NOZZLE ASSEMBLY IS MOVED RELATIVE TO THE SUBSTRATE AT A SELECTED RATE AND MOVEMENT PATTERN. A POTENTIAL DIFFERENCE (VOLTAGE) IS PROVIDED BETWEEN THE SUBSTRATE AND THE SOLUTION IN THE ASSEMBLY. THE VOLTAGE AMPLITUDE IS MODULATED SO THAT ONLY WHEN THE AMPLITUDE IS ABOVE A MININUM KNOWN VALUE PLATING TAKES PLACE.

公开(公告)号：US3806815A

公开(公告)日：1974-04-23

申请号：US33848473

申请日：1973-03-06

Applicant: NASA

Inventor： FLETCHER J ,  SIMON M

IPC: H04L27/00 ,  H04L27/227 ,  H04B1/16

CPC classification number: H04L27/2273 ,  H04L2027/0028 ,  H04L2027/0051 ,  H04L2027/0057 ,  H04L2027/0067

Abstract: A multiple phase modulated carrier tracking loop for use in a frequency shift keying system is disclosed in which carrier tracking efficiency is improved by making use of the decision signals made on the data phase transmitted in each T-second interval. The decision signal is used to produce a pair of decision-feedback quadrature signals for enhancing the loop''s performance in developing a loop phase error signal.

Abstract translation: 公开了一种在频移键控系统中使用的多相位调制载波跟踪环路，其中通过利用在每个T秒间隔中传输的数据相位上作出的判决信号来提高载波跟踪效率。 决策信号用于产生一对判决反馈正交信号，用于增强环路开发环路相位误差信号的性能。

公开(公告)号：US3805266A

公开(公告)日：1974-04-16

申请号：US29268572

申请日：1972-09-27

Applicant: NASA

Inventor： FLETCHER J ,  MUNSON R

IPC: H01Q1/28 ,  H01Q21/26

CPC classification number: H01Q1/288 ,  H01Q21/26

Abstract: A novel turnstile slot antenna is disclosed, the antenna being for and integral with a spacecraft having a substantially cylindrical body portion. The antenna comprises a circumferential slot about the periphery of the spacecraft body portion with an annular wave guide cavity defining a radial transmission line disposed within the spacecraft body portion behind and in communication with the circumferential slot. Feed stubs and associated transmission apparatus are provided to excite the annular cavity in quadrature phase such that an omnidirectional, circularly polarized, rotating radiation pattern is generated. The antenna of the instant invention has utility both as a transmitting and receiving device, and ensures continuous telemetry and command coverage with the spacecraft.

Abstract translation: 公开了一种新型的旋转门缝隙天线，该天线用于具有基本上圆柱形主体部分的航天器并与其一体。 天线包括围绕航天器主体部分的周边的周向狭槽，环形波导腔限定了设置在航天器主体部分内的径向传输线，该径向传输线在圆周槽之后并且与圆周槽连通。 提供馈电支架和相关联的传输装置以激励正交相位的环形腔，从而产生全向的，圆极化的旋转辐射图案。 本发明的天线具有作为发射和接收装置的效用，并且确保与航天器的连续遥测和指挥覆盖。

公开(公告)号：US3790795A

公开(公告)日：1974-02-05

申请号：US3790795D

申请日：1972-07-26

Applicant: NASA

Inventor： HADLEY H ,  ROBERTSON J ,  BOER K ,  FLETCHER J ,  TYAGI R

IPC: G01J5/28 ,  H01L47/02 ,  G01J1/02

CPC classification number: H01L47/023 ,  G01J5/28

Abstract: An infrared radiation detector including a cadmium sulfide (CdS) platelet having a cathode formed on one of its ends and an anode formed on its other end. The platelet is suitably doped such that stationary high-field domains are formed adjacent the cathode when biased in the negative differential conductivity region. A negative potential is applied to the cathode such that a highfield domain is formed adjacent to the cathode. A potential measuring probe is located between the cathode and the anode at the edge of the high-field domain and means are provided for measuring the potential at the probe whereby this measurement is indicative of the infrared radiation striking the platelet.

Abstract translation: 一种红外线辐射检测器，包括在其一端形成有阴极的硫化镉（CdS）血小板和在其另一端形成的阳极。 适当地掺杂血小板，使得当偏压在负微分电导率区域中时，固定的高场域形成在阴极附近。 阴极施加负电位，使得与阴极相邻形成高场域。 潜在的测量探针位于高场域边缘处的阴极和阳极之间，并且提供用于测量探针电位的装置，由此该测量指示射入血小板的红外辐射。