公开(公告)号：US3922957A

公开(公告)日：1975-12-02

申请号：US45911174

申请日：1974-04-08

Applicant: BECKMAN INSTRUMENTS INC

Inventor： OGLE DAVID G ,  TAYLOR JOHN T

IPC: F04B9/04 ,  F04B49/12 ,  F04B53/10 ,  F04B53/14 ,  F04B53/16 ,  G01N30/32 ,  G01N30/36 ,  F01B9/00

CPC classification number: G01N30/36 ,  F04B9/045 ,  F04B49/123 ,  F04B53/1005 ,  F04B53/14 ,  F04B53/164 ,  G01N2030/326

Abstract: A metering pump is provided with stroke adjustment and having a laterally, stress-free, self-aligning piston with a floating seal. A wire coupling is utilized between the pump piston and a plunger reciprocated by a drive motor. The wire is so mounted as to be pre-loaded in tension but may bend. The piston is positively driven in the axial direction but floats free laterally with no lateral force applied and with no linear backlash. Thus, the piston is positively driven, absolutely rigid in the axial direction. The arrangement is suitable for a relatively delicate and brittle piston acted upon by relatively large liquid pressure and driving force.

Abstract translation: 计量泵具有行程调节并具有横向无应力的具有浮动密封的自对准活塞。 在泵活塞和由驱动马达往复运动的柱塞之间使用线耦合。 电线被安装成预加载紧张但可能弯曲。 活塞在轴向上被正向驱动，但横向浮动，没有施加横向力并且没有线性间隙。 因此，活塞被正向驱动，在轴向上是绝对刚性的。 该装置适用于通过相当大的液体压力和驱动力作用的相对脆弱的活塞。

公开(公告)号：US3920993A

公开(公告)日：1975-11-18

申请号：US50698474

申请日：1974-09-18

Applicant: BECKMAN INSTRUMENTS INC

Inventor： CEDERSTRAND CARL N ,  KEEGAN JACK J

IPC: G01N21/35 ,  G01N21/26

CPC classification number: G01N21/3504

Abstract: An optical bench having a gas flow cell with an infrared source at one end and an infrared sensor at the other end is provided with an attachment or ''''piggyback'''' for determining the concentration of a second constituent or pollutant in a sample. The attachment comprises a sensor inserted into the gas cell adjacent to the end toward the infrared source so that a beam of radiant energy falls directly upon the inserted sensor. The invention is particularly well suited for determining the concentration of a pollutant which occurs in greater concentration or is more highly absorptive of radiant energy than that of the pollutant for which the optical bench was originally designed.

Abstract translation: 具有在一端具有红外源的气体流通池和另一端的红外线传感器的光学工作台具有用于确定样品中第二种成分或污染物的浓度的附件或“背负式”。 该附件包括一个传感器，该传感器插入到靠近红外线源端的气室中，使得一束辐射能直接落在插入的传感器上。 本发明特别适用于确定与最初设计光学台的污染物相比发生的浓度更高或更高的辐射能吸收的污染物的浓度。

公开(公告)号：US3911277A

公开(公告)日：1975-10-07

申请号：US49167274

申请日：1974-07-25

Applicant: BECKMAN INSTRUMENTS INC

Inventor： CEDERSTRAND CARL N ,  KEENAN CHARLES A

IPC: G01N21/35 ,  G01N21/34

CPC classification number: G01N21/3504

Abstract: A sensor unit is provided for selective detection of one or another of gaseous pollutants by response to absorption of infrared radiation by the pollutant to be detected. The unit contains a pair of thermistor elements mounted back to back in a housing having two opposite windows, in each of which filters are mounted. These filters are selective for the different radiation absorption characteristics of two different gaseous pollutants such as carbon monoxide and hydrocarbons. Each thermistor is behind a different filter. The unit is rotatable to expose one filter window or the other to radiation passing through the sample containing the pollutant to be measured. A shield is provided to shade the filter window which is not to be exposed to radiation.

Abstract translation: 提供传感器单元，用于通过响应待检测污染物的红外辐射的吸收来选择性地检测一种或另一种气态污染物。 该单元包含一对背对背安装的热敏电阻元件，该热敏电阻元件具有两个相对的窗口，每个过滤器都安装在其中。 这些过滤器对于两种不同的气体污染物如一氧化碳和碳氢化合物的不同辐射吸收特性是选择性的。 每个热敏电阻都位于不同的过滤器之后。 该单元可旋转以将一个过滤窗或另一个过滤窗暴露于通过含有要测量污染物的样品的辐射。 提供屏蔽以遮蔽不暴露于辐射的过滤器窗口。

公开(公告)号：US3877875A

公开(公告)日：1975-04-15

申请号：US38074073

申请日：1973-07-19

Applicant: BECKMAN INSTRUMENTS INC

Inventor： JONES ROBERT H ,  JOHNSTON MICHAEL B

IPC: G01N31/00 ,  G01N25/22

CPC classification number: G01N31/005 ,  Y10T436/172307 ,  Y10T436/176152

Abstract: A unitary system is provided with separate channels for detecting and analyzing different types of nitrogen-containing compounds, particularly those which may be encountered in waste treatment or in pollution control or in food product analysis. The channels are so designed that an injected sample is acted upon in gaseous or suspended form, with reaction products thereof carried through the system by carried gas and ultimately converted to nitric oxide for analysis in a nitric oxide analyzer. Each channel contains reaction columns packed with a suitable substance. There is a total combined nitrogen channel in which a sample is first catalytically oxidized to form nitric oxides. In a nitrite-nitrate nitrogen channel a sample is first treated to form nitrites and injected into a reaction column packed with an acidifying substance and in an ammonia nitrogen channel the sample is injected into a reaction column packed with an alkalyzer before proceeding to a reaction column packed to catalytically oxidize the resulting ammonia to nitrogen dioxide and nitric oxide. In a modified embodiment a suitably pretreated sample suspected of cyanide content may also ultimately be converted to nitric oxide for analysis.

Abstract translation: 提供单一系统，用于检测和分析不同类型的含氮化合物，特别是在废物处理或污染控制或食品分析中可能遇到的那些。 通道被设计成使得注射的样品以气态或悬浮形式起作用，其反应产物通过载体气体运送到系统中，并最终转化为一氧化氮以在一氧化氮分析仪中进行分析。 每个通道都含有装有合适物质的反应塔。 存在总共合并氮通道，其中样品首先被催化氧化以形成一氧化氮。 在亚硝酸盐 - 硝酸盐氮气通道中，首先处理样品以形成亚硝酸盐并注入装有酸化物质的反应塔中，并且在氨氮通道中，将样品注入装有烷烃的反应塔中，然后再进行反应柱 包装以将所得氨催化氧化成二氧化氮和一氧化氮。 在修改的实施方案中，怀疑氰化物含量的适当预处理的样品也可最终转化为一氧化氮进行分析。

公开(公告)号：US3875428A

公开(公告)日：1975-04-01

申请号：US42307473

申请日：1973-12-10

Applicant: BECKMAN INSTRUMENTS INC

Inventor： LE BLANC RICHARD E ,  DELETTREZ BERNARD F

IPC: G06G7/186 ,  G06G7/12 ,  H03K17/00

CPC classification number: G06G7/186

Abstract: An integrator for an electrical signal is provided with means for changing integrating rates without attenuating the input signal or utilizing a potentiometer to give different degrees of attenuation for this purpose. Instead of attenuating the input signal with varying degrees of attenuation, means are provided to control the proportion of time that the full input signal is applied to the integrator. Adjustable, pulse-length controlled electronic switches are employed for alternately changing the gain of the integrator, in order to control the length of time that the signal is applied to the integrator.

Abstract translation: 用于电信号的积分器具有用于改变积分速率而不衰减输入信号或利用电位计给出不同程度衰减的装置。 不是以不同程度的衰减来衰减输入信号，而是提供了将整个输入信号施加到积分器的时间比例的装置。 可调节的脉冲长度控制电子开关用于交替地改变积分器的增益，以便控制信号被施加到积分器的时间长度。

公开(公告)号：US3875037A

公开(公告)日：1975-04-01

申请号：US44348574

申请日：1974-02-19

Applicant: BECKMAN INSTRUMENTS INC

Inventor： KRULL IRWIN H

IPC: G01N27/49 ,  G01N27/46

CPC classification number: G01N27/404

Abstract: An electrode structure having a generally tubular body terminating in a generally cup-shaped end with an axially extending aperture. An insert is provided, the insert having a circumferential shoulder for engaging a circumferential detent within the open end of the body, the engagement being accomplished by providing a plurality of axially extending slots about the periphery of the open end, the fingers so formed deforming under pressure of insertion of the insert until the shoulder engages the detent means. A cap is provided to cover the open end of the tubular body in closing mating relationship to maintain the engagement of the shoulder within the detent. The aperture is closed by means of a membrane in sealing relation with an electrode extending through the insert.

公开(公告)号：US3873216A

公开(公告)日：1975-03-25

申请号：US34247073

申请日：1973-03-19

Applicant: BECKMAN INSTRUMENTS INC

Inventor： GROPPER LEE ,  THURBER WALTER W

IPC: G01N21/07 ,  G01N21/27 ,  G01N21/45 ,  G01J1/02

CPC classification number: G01N21/276 ,  G01N21/07 ,  G01N21/274 ,  G01N21/45

Abstract: A photoelectric scanner associated with an ultracentrifuge can be calibrated by rotating in the ultracentrifuge a sample cell having, in place of a centerpiece containing sample solution, a disc having two slits, one slit having substantially uniform width, the other slit having stepwise graduated width, and comparing the output signal of the scanner with the known differences in width between the two slits of the disc.

Abstract translation: 与超速离心机相关联的光电扫描器可以通过在超速离心机中旋转来校准具有代替含有样品溶液的中心件的样品池，具有两个狭缝的盘，具有基本上均匀宽度的一个狭缝，另一个狭缝具有逐级刻度宽度， 并且将扫描仪的输出信号与盘的两个狭缝之间的已知宽度差异进行比较。

公开(公告)号：US3840342A

公开(公告)日：1974-10-08

申请号：US15947071

申请日：1971-07-02

Applicant: BECKMAN INSTRUMENTS INC

Inventor： NETI R ,  ROCKS R

IPC: C01B21/26 ,  G01N21/76 ,  B01J1/10 ,  G01N27/64

CPC classification number: G01N21/766 ,  C01B21/262 ,  Y10T436/178459

Abstract: The method of converting nitrogen dioxide to nitric oxide which includes maintaining the nitrogen dioxide at a temperature from about 40*C to about 130*C. The nitrogen dioxide is exposed to ultraviolet radiation, whereby the nitrogen dioxide is converted to nitric oxide. A method of measuring nitrogen dioxide utilizing this conversion is also disclosed.

公开(公告)号：US3834794A

公开(公告)日：1974-09-10

申请号：US37446073

申请日：1973-06-28

Applicant: BECKMAN INSTRUMENTS INC

Inventor： SOREF R

IPC: G01R13/40 ,  G02F1/1343 ,  G02F1/28

CPC classification number: G01R13/40 ,  G02F1/134363 ,  G02F2201/124

Abstract: A flat panel, electric field controlled device is provided for the measurement and display of electrical parameters such as voltage, the voltage sensing effect being provided by a nematic liquid crystal medium having high positive dielectric anisotropy and placed in a thin flat-sided optically transparent cell. Optical transmission of the nematic liquid crystal medium is controlled by voltages applied to interdigital arrays of parallel electrode elements affixed on the inner surface of only one of the transparent parallel cell walls. Continuous relative changes in the respective potentials applied to the electrode arrays provide continuous analog movement of the borders between birefringent and non-birefringent areas formed in the liquid crystal medium.

Abstract translation: 提供了一种平板电场控制装置，用于测量和显示诸如电压的电参数，电压感测效应由具有高正介电各向异性的向列型液晶介质提供并放置在薄的平面光学透明单元 。 向列型液晶介质的光学传输是通过施加在固定在仅透明平行细胞壁之一的内表面上的平行电极元件的指指式阵列上的电压来控制的。 施加到电极阵列的各个电位的连续相对变化提供在液晶介质中形成的双折射区域和非双折射区域之间的边界的连续模拟运动。

公开(公告)号：US3834243A

公开(公告)日：1974-09-10

申请号：US33672673

申请日：1973-02-28

Applicant: BECKMAN INSTRUMENTS INC

Inventor： BURKE R

IPC: G01N21/00 ,  G05D3/12 ,  F16H55/04

CPC classification number: G05D3/12 ,  Y10T74/1812 ,  Y10T74/19879

Abstract: Apparatus for slidably positioning a sample tray biased in a first direction by restoring means, the sample tray being coupled to a rack member coacting with a small motor driven gear for driving the sample tray in a direction opposite to the first direction, the small gear being coupled to a large gear having a plurality of position determining protruding fingers engaging a pawl member. The pawl member is configured for limited pivotal movement about an axis, the pawl having a pocket configured in one end thereof for sequentially engaging the protuding fingers, while the other end of said pawl has a shoulder portion engaging a solenoid actuated stop lever for selectively determining the engagement of the pocket with a predetermined protruding finger. Mechanically coupled to the sample tray is a piston engaging a fixed cylinder, the sample tray being initially motor driven to the extreme limit of its first direction with the solenoid energized to permit pivoting of the pawl member, the sample tray then being precisely positioned in the opposite direction to one or more selected positions under action of selective energization of the stop lever, under the force of the restoring means, the speed of return being controlled by the piston and cylinder. Limit switches are provided for selective sequential control.

Abstract translation: 用于通过恢复装置可滑动地定位沿第一方向偏移的样品托盘的装置，所述样品托盘联接到与小马达驱动齿轮共同作用的齿条构件，用于沿与第一方向相反的方向驱动样品托盘，小齿轮 联接到具有多个位置的大齿轮，所述多个位置确定突出的指状物接合棘爪构件。 棘爪构件被构造成围绕轴线进行有限的枢转运动，棘爪具有在其一端中构造的袋，用于顺序地接合突出指，而所述棘爪的另一端具有接合螺线管致动的止动杆的肩部，用于选择性地确定 口袋与预定的伸出的手指接合。 机械地联接到样品托盘的是活塞，其与固定的圆筒接合，样品托盘最初被马达驱动到其第一方向的极限，螺线管通电以允许棘爪构件的枢转，然后将样品托盘精确定位在 在恢复装置的力作用下，在停止杆的选择性激励的作用下，与一个或多个选定位置相反的方向，返回速度由活塞和气缸控制。 限位开关用于选择性顺序控制。