Abstract:
Apparatus for continuous casting of metals including a cooled axial mold wall defining at least part of a mold cavity and a wall structure extending transversely of the axial wall and located therein, provided with a solid cooled sealing element of resilient graphitic material extending therearound and internally abutting the axial wall which is moved on its axis relatively to the transverse wall. On the face thereof which contacts molten metal and covering a portion of the sealing element in overlapping relation, such transverse wall has a refractory element having an outer surface portion thereof adjacent the axial mold wall disposed at an angle to the last-mentioned wall. There is also provided a nozzle structure having improved thermal characteristics for delivering molten metal to a mold cavity for continuous casting.
Abstract:
Method and apparatus for reaction-rate analysis wherein a fluid sample, which has been treated to undergo a reaction, is flowed into a conduit and then flowed out of the conduit in the reverse direction so that the first sample portion which enters the conduit is the last sample portion to leave the conduit. The outflow of the conduit is to an analysis station wherein a constituent of interest of the sample is quantitatively analyzed.
Abstract:
New and improved methodology and apparatus for non-invasive biophysical diagnosis are disclosed and comprise the ensonification of body parts with multi-frequency energy pulses in predetermined timed sequence, the detection of the resultant echo pulses, the processing of the latter to provide signals indicative of the impedance of the body part, the referencing of said signals to the biophysical cycle of the body part, and the real time display of said signals in the form of an impedance profile of said body part.
Abstract:
A FLUID SYSTEM FOR INCLUSION IN AN AUTOMATED FLUID SYSTEM FOR ANALYZING A SERIES OF LIQUID SAMPLES FLOWING SERIATIM, THE FIRST-MENTIONED SYSTEM SERVING TO DILUTE EACH SAMPLE FOR SUBSEQUENT DIVISION INTO A LARGE NUMBER OF PARTS. EACH DILUTEDPART IS INTENDED FOR FLOW TO ONE OF A LARGE NUMBER OF DIFFERENT SUBCOMBINATIONS OF THE TOTAL SYSTEM. IN EACH OF THE SUBCOMBINATIONS THE DILUTED SAMPLE PART MAY RECEIVE A SPECIAL TREATMENT, SUCH AS MIXING WITH APARTICULAR REAGENT OR REAGENTS UNDER CONTROLLED TEMPERATURE CONDITIONS FOR EXAMPLE, PRIOR TO ANALYSIS OF THAT SAMPLE PORTION AS BY PHOTOMETRY FOR EXAMPLE. EACH DILUTED SAMPLE PART MAY BE SUBJECTED TO A DIFFERENT TEST OR ANALYSIS THERE IS INVOLVED IN THE FIRST-MENTIONED SYSTEM THE SAME AND EQUAL DILUTION TREATMENT OF EACH SAMPLE AS THE SERIES. ALSO INVOLVED IN THE FIRST-MENTION SYSTEM IS THE EFFECTIVE INHIBITION OF CROSS CONTAMINATION OF SAMPLES FROM THE POINT OF INTRODUCTION OF THE SAMPLES INTO THE DILUTION SYSTEM TO THE POINT, AFTER DIVISION OF THE SAMPLES AS AFORESAID, WHERE THE SAMPLES FLOW INTO THE RESPECTIVE ONES OF THE AFORESAID ANALYSIS SUBCOMBINATIONS.
Abstract:
Stable, lyophilized diagnostic compositions are disclosed effective in determining glutamic oxalic transaminase (GOT) and glutamic pyruvic transaminase (GPT) comprising malate dehydrogenase (for GOT) or lactate dehydrogenase (for GPT), a pyridine nucleotide and a buffer having a sodium content of less than about 600 meq./1. capable of regulating the pH of the composition in reconstituted form. Also disclosed are the aqueous reconstituted products, the method of determining the activity of GOT and GPT in a sample using the subject compositions and the process for making the disclosed diagnostic compositions.
Abstract:
Liquid from a liquid sample container is flowed in automated analysis apparatus into a filter-equipped inlet end of a probe while the latter is immersed in the liquid, for transport of the sample to automated analysis. The probe is subsequently removed from the container and immersed in the liquid of a wash receptacle. Prior to immersion in another liquid sample, a fluid, other than sample, is flushed through the aforementioned filter in a reverse direction to cleanse it of particulate matter, the flushing being in timed relation to the movements of the probe.
Abstract:
New and improved method and apparatus for the analysis of samples by atomic spectroscopy are provided and comprise sample atom production means taking the form of body means having a generally central sample chamber extending generally longitudinally therethrough, and heating means for heating said chamber and adjacent areas to convert said sample to atoms. Sample stream generation means in the nature of drop generator means are operably associated with said body means at the lower extremity thereof and are effective to generate a stream of sample drops of substantially uniform size for upward passage through said body chamber to result in a formation of a concentrated atom cloud or sample volume of the sample atoms of interest above said body means. Means are provided to modulate the formation of said sample volume by said sample drop stream to provide for more accurate read-out of the sample atom concentration of interest. Means are also provided to enable the simultaneous multielement analysis of a sample by atom spectroscopy and comprise a plurality of drop generator means which are operable to generate a plurality of sample drop streams for passage through said body chamber to form said sample volume, and means are provided to periodically and alternately deflect said sample drop streams from passage into said sample volume to substantially eliminate signal interference. As disclosed, the new and improved method and apparatus of the invention are particularly adaptable for use in automatically operable sample supply, treatment and analysis means which are operable to automatically analyze a series stream of a large plurality of different samples on a continuous flow basis.
Abstract:
NEW AND IMPROVED METHOD AND APPARATUS FOR THE FULLY AUTOMATIC, HIGHLY ACCURATE QUANTITATIVE ANALYSIS OF A SERIES OF SAMPLES WITH REGARD TO A CONSTITUENT THEREOF ON A CONTINUOUS FLOW BASIS THROUGH RATE REACTION DETERMINATION ARE PROVIDED AND ARE OPERABLE THROUGH THE CONTINUOUS MIXING OF SAID SAMPLES AND A SUITABLE REACTANT IN CONSTANT PROPORTION, AND THE FLOW OF THE RESULTANT SAMPLE-REACTANT MIXTURES BY PUMPING ON A CONTINUOUS BASIS THROUGH REACTION PROMOTING MEANS TO PROMOTE THE SAMPLE CONSTITUENT-REACTANT RATE REACTION IN SUCH MANNER THAT DIFFERENT PORTIONS OF EACH OF THE SAMPLE-REACTANT MIXTURES ARE REACTED FOR DIFFERENT TIMES TO EFFECT A DIFFERENTIAL IN A CHARACTERISTIC OF SAID MIXTURES AS DEVELOPED AS A RESULT OF SAID REACTION. FOLLOWING THIS, THE THUSLY REACTED SAMPLE-REACTANT MIXTURE PORTIONS ARE FLOWED THROUGH DETECTOR MEANS FOR DETECTION OF SAID CHARACTERISTIC DIFFERENTIAL AND RESULTANT PROVISION OF AND OUTPUT SIGNAL WHICH IS INDICATIVE OF THE SAMPLE CONSTITUENT QUANTITY OF INTEREST. SUBSTANTIALLY HYPERBOLIC VARIATION IN THE FLOW RATE OF EACH OF SAID SAMPLE-REACTANT MIXTURES THROUGH SAID REACTION PROMOTING MEANS IS UTILIZED TO PROVIDE FOR THE DIFFERENT SAMPLE-REACTANT MIXTURE PORTION REACTION TIMES. AS SPECIFICALLY DISCLOSED HEREIN, THE METHOD AND APPARATUS OF THE INVENTION ARE PARTICULARLY ADAPTABLE TO THE ANALYSIS OF A SERIES OF BLOOD SAMPLES WITH REGARD TO AN ENZYME CONSTITUENT THEREOF.
Abstract:
New and improved apparatus are provided for the automatic calibration of automatic, multiple channel sample analysis means and comprise level set means to automatically control the level of the analysis means analog output signals and maintain the latter within the same general operating range, zero set means to automatically determine the background signal level for each analysis channel and subtract the same from the analysis channel output signal, attendant the conversion thereof to digital form, and calibration means to vary the scale factor involved in said signal conversion in accordance with the operating characteristics of each of said analysis channels.
Abstract:
The juxtaposed ends of two glass pipe sections are joined by a coupling construction which comprises an inner coupling sleeve having its ends frictionally mounted in coupling chambers formed in cylindrical enlargements (end bells) provided at each of the juxtaposed ends to thereby effect radial fluid seals in the enlargements. An O-ring is disposed in an annular groove formed in the outer surface of the sleeve in the space between the juxtaposed ends to form fluid seals thereat. Threadedly telescoped external coupling rings are mounted over external portions of the enlargements to draw the latter toward each other to effect pressure between the enlargements and the O-ring to maintain the aforementioned fluid seals.