公开(公告)号：US3693436A

公开(公告)日：1972-09-26

申请号：US3693436D

申请日：1970-08-28

Applicant: LAB DATA CONTROL INC

Inventor： GILDNER KENNETH J

IPC: G01F1/704 ,  G01F1/00

CPC classification number: G01F1/704

Abstract: There is disclosed a liquid flow meter comprising a transparent glass tube upon which is positioned a pair of spaced photodetectors. The liquid to be measured is passed through the tube and through the detectors. A supply tank filled with gas at a suitable pressure is connected to a valve which, when actuated, injects into the liquid stream a bubble of predetermined size. Passage of the bubble through the two photodetectors actuates a timing circuit which displays the elapsed time, thereby giving an accurate measurement of flow rate.

Abstract translation: 公开了一种液体流量计，其包括透明玻璃管，在该透明玻璃管上定位有一对间隔开的光电检测器。 待测量的液体通过管并通过检测器。 在适当压力下填充有气体的供应罐连接到阀，当被致动时，该阀将预定尺寸的气泡注入到液体流中。 通过两个光电探测器的气泡的通过启动显示经过时间的定时电路，从而给出流量的精确测量。

公开(公告)号：US3666941A

公开(公告)日：1972-05-30

申请号：US3666941D

申请日：1970-09-28

Applicant: LAB DATA CONTROL INC

Inventor： WATSON EMMETT S

IPC: G01J1/16 ,  G01N21/64 ,  G01N23/22

CPC classification number: G01N21/645 ,  G01J1/1626 ,  G01N2201/0806

Abstract: There is disclosed a double beam differential fluorimeter requiring no light chopper and characterized by unusually small cell volume and high optical efficiency. The instrument comprises a bifurcated conical light tunnel having highly reflecting internal surfaces. A transparent tube passes through each side of the bifurcated light tunnel, one for containing a sample fluid, the other for containing a reference fluid. A light source directs ultraviolet radiation into the large end of the conical tunnel. A pair of photodetectors are positioned at the small end of the tunnel, together with an ultraviolet blocking filter. Each detector is responsive, respectively, to fluorescence from the sample and reference fluids. An electrical bridge circuit compares the intensities of the fluorescence derived from the sample and reference fluids.

Abstract translation: 公开了一种双光束差分荧光计，其不需要光斩波器，其特征在于异常小的电池体积和高的光学效率。 仪器包括具有高反射内表面的分叉圆锥形光通道。 透明管通过分叉光通道的每一侧，一个用于容纳样品流体，另一个用于容纳参考流体。 光源将紫外线辐射引导到锥形隧道的大端。 一对光电探测器与紫外线阻隔滤光片一起定位在隧道的小端。 每个检测器分别响应于来自样品和参比流体的荧光。 电桥电路比较来自样品和参比流体的荧光的强度。

公开(公告)号：DE2148367A1

公开(公告)日：1972-04-06

申请号：DE2148367

申请日：1971-09-28

Applicant: LAB DATA CONTROL INC

IPC: G01J1/16 ,  G01N21/64 ,  G01N21/52

Abstract: There is disclosed a double beam differential fluorimeter requiring no light chopper and characterized by unusually small cell volume and high optical efficiency. The instrument comprises a bifurcated conical light tunnel having highly reflecting internal surfaces. A transparent tube passes through each side of the bifurcated light tunnel, one for containing a sample fluid, the other for containing a reference fluid. A light source directs ultraviolet radiation into the large end of the conical tunnel. A pair of photodetectors are positioned at the small end of the tunnel, together with an ultraviolet blocking filter. Each detector is responsive, respectively, to fluorescence from the sample and reference fluids. An electrical bridge circuit compares the intensities of the fluorescence derived from the sample and reference fluids.

公开(公告)号：AU4381372A

公开(公告)日：1974-01-03

申请号：AU4381372

申请日：1972-06-23

Applicant: LAB DATA CONTROL INC

Inventor： WATSON EMMETT S

IPC: G01N21/27 ,  G01J1/16 ,  G01N21/31 ,  G01J3/42 ,  G01N21/02

公开(公告)号：DE2114234A1

公开(公告)日：1972-03-02

申请号：DE2114234

申请日：1971-03-24

Applicant: LAB DATA CONTROL INC

Inventor： O YEISER JOHN

IPC: G01D1/04 ,  G01F15/06

公开(公告)号：GB1313044A

公开(公告)日：1973-04-11

申请号：GB1382271

申请日：1971-05-07

Applicant: LAB DATA CONTROL INC

IPC: G01D1/04 ,  G01F15/06 ,  G01D9/12

Abstract: 1313044 Recording-apparatus LABORATORY DATA CONTROL Inc 7 May 1971 [21 Aug 1970 4 Feb 1971] 13822/71 Heading G1J [Also in Divisions G4 H2 H3 and H4] In a graphical recording system an analog trace 2 of an electrical input signal e is marked on a chart 1 and a function e p of the signal e is converted into electrical pulses of an analogous repetition rate f by a voltage to frequency converter 29 connected to a driving circuit 28' which produces a modified wave form to feed to a motor 28 connected through a cam 27 to a marking element 23 to mark an oscillating integrator trace 22 along a portion of the chart 1. A null-balance potentiometric recorder is used comprising a servo motor 8 to drive a marking element 3 and wipers of balancing and transmitting potentiometers 11, 12 whereby the ordinate p of trace 2 represents e 1 and a linear function thereof is fed to inputs 30, 31 of the converter 29. Between the input and output terminals 31, 33 of the converter 29, Fig. 4, a transistor 61 is connected as a constant current element with transistors 62, 63 as amplifier stages and a transistor 64 as emitter follower stage, a feedback to the output of transistor 61 through a timing capacitor 71 determining the repetition rate f in conjunction with the collector current of transistor 61, preset by adjusting an emitter resistor 70. A temperature-compensating diode 86 is connected adjacent input 30. The pulse output terminal 33 is connected to a counter 34 and magnetic recorder 35 and through a small capacitor 84 to a squarewave multivibrator comprising alternately conducting transistors 65, 66 coupled to the bases of output stages 67, 68 to drive the stepping motor 28'. The cam 27 is shaped to displace the element 23 linearly in proportion to the angular displacement of the cam so that the number of oscillations of the wave 22 traced is proportional to the area under the trace 2. With a motor 28 arranged to advance a fixed increment for each pulse the wave 22 is traced in steps and counting of the oscillations and fractions thereof is facilitated if (a) the amplitude of the wave 22 is made to correspond to ten steps Fig. 2 (not shown) and (b) a cam with a plurality of lobes is used with at least one having a distinctive shape to accentuate the corresponding cycle of the wave, Fig. 5 (not shown).