Abstract: A liquid chromatography system has a reservoir for the mobile phase with a cap which provides for effective control of charging the reservoir with the mobile phase, sparging the mobile phase while it is in the reservoir, feeding the mobile phase to the chromatograph, returning the mobile phase to the reservoir after it has passed through the chromatograph, venting or vacuumization of the reservoir and providing for automatic release of overpressure within the reservoir, all while maintaining the sparged environment in the reservoir.

Abstract: For use with large size containers having narrow entrance openings, the stirrer blade is mounted on a support rod for pivotal movement from an angled position which permits insertion into the narrow entrance opening to a perpendicular position suitable for stirring. The blade is carried on a slotted tube which has a recess into which a plunger connected to the end of the rod is movably received. The plunger contacts the upper edge of the blade. Once the blade is situated in the container, the rod is moved relative to the tube, causing the plunger to pivot the blade to the stirring position.

Abstract: The spherical containment reservoir has first and second circumferentially spaced tubular necks. A tubular bridge interconnects the first and second necks at points spaced from the reservoir. The first neck is sealed between the connecting point and the reservoir. A valve seat is situated in the second neck between the connecting point and the reservoir. The internal surface of the second neck is threaded to accept a valve stem above the valve seat.

Abstract: A capillary tube is shrunk around a wire heating element, fashioned into the desired configuration, and situated between the exterior surface of a cylindrical inner glass tube and the interior surface of a cylindrical outer glass tube, to form an assembly. The space between the adjacent tube surfaces is evacuated as a heat source is moved along the axis of the assembly to heat each longitudinal section of the assembly, in sequence. The element is thermally expanded as the outer tube surface collapses toward the inner tube surface, resulting in the fusion of the adjacent glass surfaces around the expanded element. In this manner, a channel is formed through the fused glass body which has the configuration and dimensions of the expanded element. During cooling, the element returns to its unexpanded condition. This results in a space between the channel walls and the element, permitting the element to expand, when electrically energized, without breaking the glass body.

Abstract: A fiberoptic head includes, for each channel, two separate illuminating fiberoptic bundles and a light receiving fiberoptic bundle. Each illuminating fiberoptic bundle has its input end adjacent a light source. The light receiving fiberoptic bundle has its output end adjacent to a light detector. A block is provided with first, second and third passageways terminating at separate elongated apertures at the operative surface thereof. Each bundle extends through a different one of the passageways with the illuminating bundles terminating at apertures spaced from either side of the aperture for the light receiving bundle. The exterior apertures are located such that the projected illumination patterns overlap on the zone on the test surface from which the receiving bundle gathers light.

Abstract: A capillary tube is shrunk around a wire heating element, fashioned into the desired configuration, and situated between the exterior surface of a cylindrical inner glass tube and the interior surface of a cylindrical outer glass tube, to form an assembly. The space between the adjacent tube surfaces is evacuated as a heat source is moved along the axis of the assembly to heat each longitudinal section of the assembly, in sequence. The element is thermally expanded as the outer tube surface collapses toward the inner tube surface, resulting in the fusion of the adjacent glass surfaces around the expanded element. In this manner, a channel is formed through the fused glass body which has the configuration and dimensions of the expanded element. During cooling, the element returns to its unexpanded condition. This results in a space between the channel walls and the element, permitting the element to expand, when electrically energized, without breaking the glass body.

Abstract: A container particularly suitable for use in the scientific market for storage and shipment of chemical standards, radioactive isotopes, and the like. The overall container includes an inner glass vial having a bottom end of inner pointed configuration to permit a researcher or the like to retrieve all of the sample, or material, contained therein via a syringe needle. The inner glass vial is inserted into an outer holder fabricated from a material which serves to protect the inner vial and means are provided in the outer holder or cover for viewing the contents in the inner vial.The function of the holder is to reduce weight, provide means of standing the vial upright, allow visibility to contents and provide a safety shield to guard against accidental breakage. Means are also included for closing and sealing the interior vial.