Abstract:
A magnetic mixer for laboratory use which includes a permanent magnet mounted for rotation and driven on an axis centrally between its poles. A volume of combined liquids, containing in addition a multiplicity of magnetic particles, is supported centrally with reference to the magnet poles for activation of the particles in the rotating magnetic field to mix the liquids to achieve a reaction between them or merely a blending. This rotational force on the mixture has the effect of redistributing the magnetic particles away from the center of the mixture which effect, unless countered, lessens the mixing action. A second permanent magnet is provided having its poles in substantial alignment with the first mentioned axis, and having one of these last-mentioned poles spaced a distance nearer to the mixture than the other pole thereof, the magnetic field of the second magnet being substantially at right angles to the magnetic field of the first magnet. The field of the second magnet effectively counters by attraction the aforementioned redistributing movement of the magnetic particles, and the resultant particle distribution is substantially uniform throughout the combined liquids.
Abstract:
A separator for separating multiphase fluid streams. The separator includes inlet and outlet means having wettable means positioned within the inlet means to direct the fluid to the outlet means.
Abstract:
A DISPENSER INCLUDING A CONTAINER BODY HAVING A MOUTH. A PERMANENT LIQUID SEAL ACROSS THE MOUTH HAS A PAIR OF DUCTS APPROACHING THE BOTTOM OF THE CONTAINER AND OPENING THEREINTO. THE DUCTS EXTEND UPWARDLY THROUGH THE SEAL, HAVING THEIR UPPER ENDS SPACED APART. BEFORE USE, A SHORT LENGTH OF FLEXIBLE TUBING INTERCONNECTS THE UPPER ENDS OF THE DUCTS TO PREVENT LEAKAGE AND SPILLAGE. ONE END OF THE TUBING MAY BE DISCONNECTED AND THEN CONNECTED TO A SUCTION INLET SO THAT THE CONNECTED ONE OF THE PAIR OF DUCTS BECOMES AN ASPIRATING TUBE AND THE OTHER PROVIDES
AN AIR INLET. MULTIPLE CONTAINER BODIES MAY BE SUPPORTED TOGETHER.
Abstract:
New and improved method and apparatus for the time sharing of multiple channel fluid sample analysis means are provided and comprise operatively associated light source, light sensitive detector means, digital logic means, detector and logic means timing and control means, detector circuit means, multiple channel fluid sample analysis result read-out means and read-out means timing and control means, respectively, said detector means is constituted by a single light-sensitive detector means in the nature of a photo-multiplier tube, and said detector circuit means comprises a single, temperature stabilized log diode and amplifier. An embodiment is disclosed wherein said light source is automatically and precisely tunable light source. In operation, the apparatus is effective to repeatedly scan said multiple channel analysis means and provide simultaneous recordings of the analysis results which are linear with regard to the respective fluid sample optical densities on said analysis result read-out means. The apparatus is applicable for use with multiple channel analysis means which include only colorimeters, and for use with multiple channel analysis means which include colorimeters and fluorimeters. The advantageous disposition of the analysis means on the manifold of operatively associated fluid sample supply and treatment means is also made possible by the apparatus of the invention.
Abstract:
There is provided a spectral flame burner of the preatomizer type having a sample tube the outlet of which is disposed within a carrier gas conduit terminating in a nozzle. The spacing between the outlet of the sample tube and the outlet of the nozzle is adjustable during the normal operation of the analyzer system, including the burner. Improved means is provided to withdraw the outlet of the sample tube to a position in which sufficient gas pressure is developed in the sample tube to blow out any obstruction in the latter, including a lead screw mechanism operatively associated with the sample tube. The burner has an improved cap construction and a control system is provided for the burner to safely shut down the burner when a defect is detected in the burner system.
Abstract:
A fluid injection device for incorporation in automated apparatus for the quantitative analysis of a substance transported in a flowing liquid stream segmented by gas bubbles or other immiscible fluid segments. The device includes a body defining an elongated fluid passageway portion. One end of the passageway portion provides an inlet for fluid or gas under pressure through a tube extending into the passageway portion from the last-mentioned end toward the other end thereof, which tube has a discharge end portion received axially within the passageway portion. An inlet for unsegmented liquid under pressure communicates with the passageway portion, upstream of the aforementioned discharge end portion of the tube, providing for axial injection of gas into the stream of liquid flowing from the liquid inlet toward the other end of the passageway portion. By varying the resistance to liquid flow in the area around the discharge end of the tube the size of the bubbles injected into the liquid stream may be changed.
Abstract:
A centrifuge of the type used for a number of individual test samples in separate sample containers is dynamically balanced automatically by means of a counterbalancing mass contained in an annular chamber within the centrifuge wheel. The centrifuge wheel is mounted as an inverted pendulum about a fixed pivot and spring biased to the vertical position. The counterbalancing mass, which is at the same vertical level as the sample containers, automatically moves angularly to the counterbalancing position at speeds above the speed corresponding to the natural vibration frequency of the pendulum system.
Abstract:
A tundish receiving a first molten metal and a closed-end mold are moved apart relative to each other so that the mold forms a solidified shell of a billet, molten metal flowing through the solidified shell to the mold. During the casting, a second or altered molten metal is introduced into the tundish to flow through the elongating billet so that a continuously cast billet is produced with a core of one metal, a layer of alloyed metals, and a shell of another metal. Billets may be produced with steel cores and stainless steel shells, ''''killed'''' steel cores and ''''rimmed'''' steel shells, and other combinations. Tubing may also be formed by the continued relative separation of the tundish and the mold after the source of molten metal is exhausted.
Abstract:
BLOOD SAMPLES ARE SUCCESSIVELY AND CENTRIFUGALLY LOADED INTO A SAME CAPILLARY CHAMBER DEFINED IN A CONTINUOUSLY ROTATING CENTRIFUGE HEAD TO MEASURE THE RESPECTIVE PACKED CELL VOLUMES. THE CAPILLARY CHAMBER IS OPEN-ENDED AND HAS A SERPENTINE CONFIGURATION, I.E., IT REVERSES UPON ITSELF, TO TRAP AND RETAIN A FIXED VOLUME OF EACH SUCCESSIVE BLOOD SAMPLE FOR CENTRIFUGING. THE CAPILLARY CHAMBER IS PURGED OF A PACKED BLOOD SAMPLE BY THE INTRODUCTION OF A NEXT SUCCESSIVE BLOOD SAMPLE.
Abstract:
An imbalance of a centrifuge of the type used for a number of separate sample containers is compensated by means of two overlapping semi-circular sector balancing weights, which are adjustable with respect to the axis of rotation of the centrifuge.