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公开(公告)号：US4476095A
公开(公告)日：1984-10-09
申请号：US460297
申请日：1974-04-12
CPC分类号： G01N21/79 , G01N2021/6432 , G01N2021/6443 , G01N35/1095 , Y10T436/116664
摘要： A fluorometric titrator has means to transfer a pipette between first and second positions and a buret for a chelating agent has a reversible drive powered either by a pulse generator or an oscillator. Valve controlled means are operable to place the buret in communication with the pipette or a reservoir. In the first position of the pipette, a precise sample volume is aspirated into it by the buret, then driven by the oscillator and in its second position and with the buret drive reversed but still powered by the oscillator, the sample volume is discharged from the pipette into a cuvette in the fluorometer. On the resulting fluorescence the fluorometer output drives the pulse generator to dispense chelating agent and to operate a counter until a selected end point is reached. The pipette is then returned to its second position with the buret drive again operated by the oscillator and during the return, the buret is refilled. Both before the sample volume is aspirated, and before that volume is discharged, backlash is removed from the buret drive. The effect of hysteresis on the photocell of the fluorometer is minimized by light control also enabling the response time of the titrator to be accelerated.
摘要翻译： 荧光滴定仪具有在第一和第二位置之间转移移液管的手段，并且用于螯合剂的滴定管具有由脉冲发生器或振荡器供电的可逆驱动。 阀控制装置可操作以将滴定管与移液管或储液器连通。 在移液器的第一位置，通过滴定管将精确的样品体积吸入其中，然后由振荡器驱动并处于其第二位置，并且滴定管驱动器反转但仍由振荡器供电，样品体积从 移液到荧光计中的比色杯中。 在产生的荧光上，荧光计输出驱动脉冲发生器分配螯合剂并操作计数器，直到达到选定的终点。 然后，移液管返回到第二位置，滴定管驱动器再次由振荡器操作，并且在返回期间，滴定管被再填充。 在吸取样品体积之前，在排出该体积之前，从滴定管驱动器移除齿隙。 通过光控制使滞后对荧光计的光电池的影响最小化，使得能够加速滴定器的响应时间。
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公开(公告)号：US4622123A
公开(公告)日：1986-11-11
申请号：US745961
申请日：1985-06-17
申请人： Samuel Nejame, Jr.
发明人： Samuel Nejame, Jr.
CPC分类号： F16B21/16 , B01D61/50 , B01D63/082 , B30B1/40 , F16B21/02 , F16B5/065 , F16B5/0664 , B01D2313/02
摘要： A device for compressing a pair of plates composed of a slotted post extending upright from one of the plates, arranged to pass through a port in the second of the plates, and a circular ramp member rotatably attached to the second of said plates, which ramp is positioned to engage the post slot. Upon rotation of the ramp, the post is drawn through the port resulting in a closing of the distance between or compression of the plates.
摘要翻译： 一种用于压缩一对板的装置，该板由一个从其中一个板垂直延伸的开槽柱构成，该槽被布置成穿过第二板中的端口，以及可旋转地附接到第二板的圆形坡道构件， 定位成接合柱槽。 在斜面旋转时，柱通过端口被拉动，导致板之间的距离或压缩之间的关闭。
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