G - Physics – 01 – F
Patent
G - Physics
01
F
73/59
G01F 1/66 (2006.01) G01N 35/08 (2006.01)
Patent
CA 1115981
Title: PHASING DETECTOR FOR CONTINUOUS FLOW SYSTEMS ABSTRACT OF THE DISCLOSURE A phasing system is provided for parallel channel continuous flow systems wherein the individual test channels have different flow times although inter- sample timing is constant. A phasing sample is intro- duced and its presence is sensed at the output of each of the parallel test channels. The presence of the phasing sample is detected by means of a analog detector, a digitizer, and a digital computation system. After detection of the phasing sample in a channel the time at which it arrives at the detector is marked. Since intersample timing is constant and the time when the sample is introduced into the parallel channels is known, the time at which subsequent samples should arrive at the detector can be established for each channel. Time zones are opened for each channel and each detector which correspond to the times plus or minus a certain tolerance at which subsequent samples can be expected to arrive. In a preferred embodiment, two light emitting diode/photo-transistor combinations operating on different frequencies are utilized to give a differentiated output upon sensing the presence of a colored phasing solution at the beginning of a automated blood grouping process.
329456
Schwartz P. Christopher
Spielberg Richard I.
American National Red Cross (the)
Marks & Clerk
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