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公开(公告)号：SE310801B
公开(公告)日：1969-05-12
申请号：SE484463
申请日：1963-05-02
Applicant: TECHNICON INSTR
Abstract: 1,012,065. Colorimetric flow cells. TECHNICON INSTRUMENTS CORPORATION. April 19, 1963 [May 3, 1963; Oct. 18, 1962], No. 15472/63. Heading G2J. A flow cell for use in measuring the light transmitting characteristics of a liquid as it flows through the cell, has a tubular body 22, spaced light permeable end walls a liquid inlet 32 adjacent are end wall and a liquid outlet 34 adjacent the other end wall. The inlet and outlet are joined to the body in such a manner that any bubbles of gas entering the inlet are prevented from accumulating in the body. The flow cell may be supported in a holder 10 comprising a body 42 having a slot 44 between walls 46, and extensions 48 and 52 are engaged in corresponding slots in a colorimeter. The cell is mounted in the holder by cementing the tube 34 to the holder at 70 and cementing a rod 72, secured to the cell, to the holder at 74.
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Patent Agency Ranking
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公开(公告)号：SE350100B
公开(公告)日：1972-10-16
申请号：SE393266
申请日：1966-03-24
Applicant: TECHNICON INSTR
Inventor： SMYTHE W
Abstract: 1,123,122. Rotary pumps. TECHNICON INSTRUMENTS CORP. March 15, 1966 April 5, 1965], No. 11214/66. Heading F1F. [Also in Division B8] In a rotary pump for use in chemical analysis, a plurality of flexible tubes 64 are periodically and sequentially constricted by rollers 72 attached to a pair of driven endless chains 68 to effect a peristaltic pumping action, a portion of each of which tubes is supported beneath the rollers by a spring-loaded flat table or platen (54), Fig. 5 (not shown), one of the tubes 64A being filled with a relatively inert fluid, e.g. air, and connected at its outlet end to that of an adjacent tube 64B containing a reagent fluid, and the flow of inert fluid from the tube 64A being periodically interrupted by a pin 94 whereby the reagent fluid entering tube 106 is segmented. The pin 94 is carried by one end of an arm 92 pivotally supported by a bearing 93 and having a cam surface 100 at its end remote from the pin, said surface being periodically engaged by an extension 102 of a bearing pin for each roller. The end of the arm 92 carrying the pin is biased downwardly by a tension spring 98 so that a portion of the tube 64A lying on a block 86 is normally constricted by the pin. Thus, quantities of inert fluid enter the tube 106 in phase with the peristaltic pumping action and the consequent segmentation of the reagent fluid in the tube 106 effects proper proportioning of the reagent fluid relative to a sample fluid flowing in a tube 64C when these fluids are mixed in an outlet tube 110. This arrangement provides compensation for the fluctuations in the rates of flow of fluids in the tubes 64B, 64C and allows these tubes to have different diameters. Segmentation of the sample fluid may be effected in the upstream portion of a flexible tube (152B), Fig. 10 (not shown), by periodically injecting an inert fluid e.g. air, into the inlet end (160) of said tube within a container (162) for said fluid, the inert fluid being supplied through a flexible tube (152A) controlled by a pin (94') in a manner similar to that shown. The pins 94, (94') and the parts associated therewith may be replaced by a solenoid operated valve (not shown in the drawings), which is actuated by the rollers. Alternatively, a sample fluid and a reagent fluid flowing in flexible tubes (204A, 204B), Fig. 9 (not shown), due to the action of rollers (202), are mixed when they enter a tube (208) whose outlet end lies in a tube (212) connected to a mixing coil (214), segmentation of the mixture of fluids being effected by an inert fluid e.g. air, entering the tube (212) adjacent the outlet end of the tube (208) from a flexible tube (204C), through a tube (210) made of a material, e.g. P.T.F.E., having a relatively low surface-tension. The tube (212) is made of a material, e.g. glass, having a relatively high surface-tension whereby a quantity of the inert fluid is held in the tube (210) until the pressure developed in the tube (204C) by the rollers is sufficient to drive it into the tube (212).
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公开(公告)号：SE331376B
公开(公告)日：1970-12-21
申请号：SE524667
申请日：1967-04-14
Applicant: TECHNICON INSTR
Abstract: 1,185,917. Analysing segmented stream. TECHNICON CORP. 30 MaTch, 1967 [14 April, 1966], No. 14423/67. Heading B1X. [Also in Division G1] A method of analysis of a plurality of liquid samples from sample containers 14 comprises transmitting the samples successively as a flowing stream of samples in tube 20, separating the stream into a plurality of sections by introducing through tube 30 portions of a liquid which is substantially immiscible with and inert towards the liquid samples, treating the flowing stream of samples for analysis by adding reagent through tube 38, and passing the flowing stream of treated samples including the immiscible liquid portions through an analytical instrument, for example colorimeter 46. A silicone fluid may be used as the immiscible liquid. If air is not to be admitted to the sample stream, valve 72 operatively coupled to off-take mechanism 16 connects a diluent supply line 72c to the sample line 20 at the times when the off-take tube is lifted out of a sample container. The admission of the immiscible liquid to tube 30 may be accurately controlled by a pinch valve 74 which is operated by the peristaltic pump. Valve 74 may be operatively connected to motor 66, with timedelay means if necessary, to prevent the recorder stylus 68 from making excessive movements when an immiscible liquid portion is passing through the colorimeter 46.
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