Abstract: Multiple chemical reactions are performed in a plurality of reaction vessels mounted in inlets in a manifold valve block. The manifold valve block is connected to a channel block which is utilized in conjunction with a solvent delivery system as part of the reaction cycle. The solvent fluid is drained from the reaction vessels when valves in the manifold valve block are opened while applying a vacuum thereto. Optionally, a thermal block may be utilized in conjunction with the manifold valve block and the channel block to facilitate the reaction. Upon completion of the reactant cycle, the manifold valve block is disconnected from the channel block and connected to a cleavage block assembly which contains vials for collecting reaction products. The cleavage product is drained from the reaction vessels through the manifold valve block into the vials upon opening the valves in the manifold valve block and applying a vacuum to the channel block.

Abstract: A sensor for detecting the presence of lightweight objects being conveyed on a conveyor of the type having conveyor rollers. Each conveyor roller is rotatively mounted on a shaft fixed between the conveyor side frames. A selected conveyor shaft has non-rotatively mounted thereon a pair of fulcrum bearings, each located between a conveyor side frame and the adjacent end of the roller mounted on the selected shaft. A pair of sensor arms are provided, each rockably mounted on one of the fulcrum bearings. The sensor arms are substantially identical elongated members having upper ends joined by a shaft on which a plurality of sensor rollers are rotatively mounted. The sensor arms are rockable between a normal position wherein the sensor rollers are elevated above the adjacent conveyor rollers, and a fully depressed position wherein the uppermost surface of the sensor rollers are co-planar with the uppermost surface of the adjacent conveyor rollers.

Abstract: A fitting assembly (10) mates an end of polymer micro-tubing (12) in fluid communication with an internally threaded connector (22) having an internal bottom wall (38). The fitting assembly includes a male nut (16) having external threads and a passage for receiving the end of the polymer micro-tubing. The fitting assembly additionally includes an insert (24) having an elongated stem (30) and an annular head (26). The stem projects from the rear side of the annular head for insertion into the end of the polymer micro-tubing. The annular head includes a forwardly projecting nose section (31). An elastomeric seal (40) is received on the nose section (31) and retained in place by a lip (33) included on the nose section. The seal is compressed between the head of the insert and the bottom wall of the connector.

Abstract: An improvement is made in a high resolution clinical fluoroscopic system by utilizing a beam splitter for selectively directing a fluoroscopic image of an X-ray pattern transmitted through a patient to either a low resolution or high resolution television channel. The low resolution channel operates a low magnification level to provide a macroscopic view of an object of interest in order to orient the patient and object of interest within the center of view. Thereafter, the beam splitter is activated to redirect the fluoroscopic image to a zoom lens which magnifies the image. The magnified image is then scanned by a sensitive CCD-type camera to alternatively produce through the video processor a magnified view of the object of interest at variable magnification having submillimeter resolution. Collimation of the X-ray beam is coordinated with the degree of magnification through the zoom lens to provide for contrast resolution without any substantial increase of the X-ray exposure levels.

Abstract: A shot-free millboard is asbestos-free and also free of unfiberized material, or shot, which can cause miscrosopic defects in glass sheet. The millboard of the present invention is suitable for use as float roll covering material.