Colorimeter flow cell and holder therefor

Claim 1

APPARATUS FOR THE COLORIMETRIC EXAMINATION OF A LIQUID COMPOSING: A SOURCE OF LIQUID; A SUMP FOR LIQUID; A SOURCE OF LIGHT; A DETECTOR OF LIGHT; A TUBULAR FLOW CELL HAVING A MEDIAL, ELONGATED, SUBSTANTIALLY HORIZONTAL, TUBULAR PORTION, FOR USE AS A SIGHT PASSAGEWAY, A FIRST DISTAL, ELONGATED, SUBSTANTIALLY VERTICAL, DOWNWARDLY EXTENDING, TUBULAR PORTION, COUPLED TO SAID SOURCE OF LIQUID FOR ADMITTING A STREAM OF LIQUID THEREFROM INTO ONE END OF SUCH SIGHT PASSAGEWAY, SAID MEDIAL PORTION AND SAID FIRST DISTAL PORTION HAVING A FIRST, LIGHT PERMEABLE, SUBPORTION IN COMMON WHICH IS FORMED BOTH AS AN EXTENSION OF THE SIDEWALL OF SAID FIRST DISTAL PORTION AND AS ONE ENDWALL OF SAID MEDIAL PORTION, FOR GUIDING ALL LIQUID, INCLUDING ANY GAS BUBBLES THEREIN, ALONG A SINGLE FLOW PATH INTO SUCH SIGHT PASSAGEWAY; A SECOND DISTAL, ELONGATED, SUBSTANTIALLY VERTICAL, UPWARDLY EXTENDING, TUBULAR PORTION, COUPLED TO SAID SUMP FOR LIQUID FOR WITHDRAWING THE STREAM OF LIQUID, INCLUDING ANY GAS BUBBLES THEREIN, FROM SUCH SIGHT PASSAGEWAY, SAID MEDIAL PORTION AND SAID SECOND DISTAL PORTION HAVING A SECOND, LIGHT PERMEABLE, SUBPORTION IN COMMON WHICH IS FORMED BOTH AS AN EXTENSION OF THE SIDEWALL OF SAID SECOND DISTAL PORTION AND AS THE OTHER ENDWALL OF SAID MEDIAL PORTION, FOR GUIDING THE STREAM OF LIQUID, INCLUDING ANY GAS BUBBLES THEREIN, FROM SAID SIGHT PASSAGEWAY; SAID FIRST SUBPORTION INCLUDING AN INTERIOR CONCAVE SURFACE MERGING INTO THE UPPER INTERIOR SURFACE OF SAID SIGHT PASAGEWAY AND ACROSS THE FLOW PATH OF THE FLUID AND ANY GAS BUBBLES FROM SAID FIRST PORTION FOR GUIDING ANY GAS BUBBLES INTO A FLOW PATH ALONG SAID UPPER INTERIOR SURFACE OF SAID SIGHT PASSAGEWAY; SAID SOURCE OF LIGHT BEING COUPLED TO ONE OF SAID LIGHT PERMEABLE SUBPORTIONS TO TRANSMIT LIGHT INTO SAID SIGHT PASSAGEWAY; SAID DETECTOR OF LIGHT BEING COUPLED TO THE OTHER OF SAID LIGHT PERMEABLE SUBPORTIONS TO RECEIVE LIGHT FROM SAID SIGHT PASSAGEWAY.