Abstract: Well apparatuses with device for preventing their relative rotation with respect to adjacent well apparatuses and anti-rotation devices for well apparatuses, including, but not limited to, plugs, float shoes, float collars, jars, and clutch devices for packers. In one embodiment a non-rotation device has a main member with a recess on which are disposed a plurality of teeth with a load member adjacent the teeth for bearing a load put on the device and for isolating the teeth from the load, the teeth extending beyond the recess. In one embodiment the teeth are configured, disposed, and profiled to facilitate their interengagement with other teeth and to contain between them foreign objects which might impede proper interengagement. In various embodiments plugs are provided with such anti-rotation devices. In various embodiments the load member is a continuous circular ring disposed about the apparatuses outer periphery or around the opening of a channel through the device.

Abstract: The present invention describes a class of dyes for use in staining cell samples and methods of making such dyes. A preferred class of dyes known as detergent dyes which possess the ability to stain cells in whole blood and are only slowly leached or lost from the stained cells over time are described. The present invention has application, for example, to blood typing for the determination of the presence of blood group antigens A, B, AB, O, and D (Rh.sub.o) and antibodies to such antigens.

Abstract: A seat support mechanism for a tiltable chair having a rear tilt torque mechanism including interconnected torsion bars which are adjustable to vary the resilient restraining force which opposes rearward tilt of the seat when occupied, a pair of compression springs disposed between a seat support assembly and a base member to provide added resistance to rearward tilt, a link to limit rotation of the seat support assembly within predetermined limits and a release mechanism movable between a lock position, wherein rearward tilt is prohibited and a release position, wherein rearward tilt is permitted.

Abstract: A knee brace including a tubular sleeve to encompass the knee region. An upper strap assembly includes first and second support straps that are fixed above the knee to sides of the sleeve. The free ends are fixed together and are extendable to a location beneath the knee to straddle the kneecap intension. A cymmetrical lower strap assembly has a pair of support straps fixed at one end to opposite sides of the sleeve at a location below the knee. The free ends are fixed together and are extendable to a location above the knee to also straddle the kneecap intension and tend to hold it in place during rigorous activity. Cross straps extend laterally from the point of fixation of the support straps.

Abstract: An apparatus and method are described for defining a small interrogation volume in a liquid sample suspected of containing an analyte. The apparatus and method utilize a dual optical fiber probe constructed with the ends of the optical fibers at the liquid-fiber interface spatially oriented such that the intersection of their longitudinal axes forms an included angle ranging from about 40.degree. to 140.degree.. By appropriate choice of the numerical aperture and core diameter of the optical fibers and the separation distance between the longitudinal axes of the optical fibers at the liquid-fiber interface, a finite interrogation volume of predetermined size and independent of the total liquid sample volume can be defined. The apparatus and method substantially reduce background interference with corresponding increase in assay sensitivity.

Abstract: A bi-stable electromagnet operator having an armature plate which is held in a first position by a permanent magnet and in a second position by a spring. An electromagnet is provided to enable the armature plate to move from the first position to the second position. The magnet has high coercivity and therefore the permanent magnet and core of the electromagnet can be in close magnetic contact both when the armature is in the first position and in the second position. The high coercivity of the permanent magnet provides for sufficient flux flow to maintain magnetization when the armature plate is in the second position away from the permanent magnet. Typically, the permanent magnet comprises neodymium.

Abstract: An ankle brace for providing generalized support to the ankle has a base and a tongue assembly that is separate from the base and is connected to the base in encompassing relationship to the ankle by a lace. The base has forward lateral and medial edges that straddle the foot and ankle, each edge having a row of lace eyelets. The tongue assembly has a wrap that fits over the front and the forward side portions of the foot and ankle, and a frontal member that overlies the front superior foot portion. The frontal member has lateral and medial edges that are situated close to the lateral and medial edges of the base, each edge also having a row of lace eyelets. A single lace has a lateral segment that is alternately trained through the lateral eyelets of the frontal tongue member and the lateral edge of the base, and a medial segment that is alternately trained through eyelets on the medial edge of the frontal tongue member and the medial edge of the base.

Abstract: An article carrier for a motor vehicle comprising a pair of side rails adapted to be mounted to the roof of a vehicle in spaced apart relationship and extend longitudinally of the length of the vehicle. The side rails define a guideway therein, further defined by upper and lower surfaces. First and second pairs of stanchions are provided supporting a cross rail therebetween generally perpendicular to the side rails. Each of the stanchions have a bottom wall with engaging members integral therewith extending therefrom and received in the guideways and slidable therein. The guideways capture the engaging members therein and permit only sliding movements of the engaging members therein. A recess is defined in the bottom all of the stanchions and a clamping member is received in the recess. The clamping member is rotatable in the recess and has a camming portion extending into the guideway.

Abstract: A simulated nipple which is integrally formed and having a special precision configuration in a hollowed manner forming a central cavity with a selectively positioned and configured throat portion in medical grade silicon rubber and including the manner of manufacture to provide precision created interior and exterior surfaces having a skin-like consistency and feel.

Abstract: An impeller for a centrifugal compressor includes a hub, several main blades mounted to the hub, and several splitter blades mounted to the hub, each splitter blade being located between adjacent main blades and being disposed from a position centered between the adjacent main blades by an amount of about 6% to about 33% of one half the angular distance between the main blades.

Abstract: This invention is directed to compounds of the formula (I): ##STR1## wherein R.sup.1 is --OR.sup.4 (where R.sup.4 is hydrogen, lower alkyl, lower hydroxyalkyl, phenyl, phenyl-lower-alkyl, or --(CH.sub.2).sub.n Y where n is an integer from 1 to 4 and Y is morpholino, -SR.sup.5, --C(O)OR.sup.5, --C(O)N(R.sup.6).sub.2, --N(R.sup.6).sub.2, or --N.sup.+ (R.sup.6).sub.3 X.sup.-, in which R.sup.5 is lower alkyl, each R.sup.6 is independently selected from hydrogen or lower alkyl, and X is halogen)or --SR.sup.7 (where R.sup.7 is lower alkyl, phenyl-lower-alkyl, or --(CH.sub.2).sub.n W where W is --N(R.sup.6).sub.2 or --N.sup.+ (R.sup.6).sub.3 X.sup.-, and n, R.sup.6 and X are as previously defined);R.sup.2 is lower alkyl, phenyl or phenyl-lower-alkyl;R.sup.3 is halo, hydroxy, lower alkyl, lower alkoxy, lower haloalkyl, lower haloalkoxy, or --C(O)OR.sup.5 where R.sup.5 is as previously defined; andZ is a bond, 2,5-thienyl or 2,5-furanyl; or a pharmaceutically acceptable salt thereof.

Abstract: A chromatographic device is disclosed. The device comprises in combination a housing, a strip of bibulous material non-removably confined in the housing. The strip has a length and width only slightly less than the length and width of the inner walls of the housing. The inner walls of the housing have means attached thereto for supportively confining the strip in the housing. The strip is confined so that (1) the front and back of the strip are essentially free from contact with the walls of the housing and (2) the capillary action of the strip remains substantially unchanged, and (3), where the strip is paper, the strip is allowed to expand as it is traversed by the liquid medium. The bottom end of the housing contains means for enabling contact of a portion of the strip with the liquid medium. The housing further contains means for visually observing the strip and can also contain indicating means cooperative therewith to assist in determining the result of a chromatographic test.

Abstract: The carbamate salt of 2-(2'-thienyl)-alkylamines and particularly the ethylamine and its method of synthesis are disclosed. The carbamate salt of 2-(2'-thienyl)ethylamine is a stable, easily transportable crystalline material that can be converted to 2-(2'-thienyl)ethylamine, a useful intermediate in the synthesis of 5[(2-chlorophenyl)methyl]-4,5,6,7-tetrahydrothieno-[3,2-c]pyridine hydrochloride, also known as ticlopidine hydrochloride. The synthesis is carried out by reacting an amine of formula (I): ##STR1## with CO.sub.

Abstract: Infection associated with parenteral injections of parenterally suitable compounds, especially of F.sub.2.alpha. prostaglandins, is prevented by novel compositions comprising such compounds, a locally effective amount of an antibiotic, and a pharmaceutically acceptable carrier.

Abstract: A method is disclosed for producing multiple copies of a primary polynucleotide sequence located at the 3' terminus of a polynucleotide. The method comprises (a) forming in the presence of nucleoside triphosphates and template-dependent polynucleotide polymerase an extension of a primary polynucleotide sequence hybridized with a template sequence of a single stranded pattern polynucleotide comprising two or more template sequences each containing one or more site specific cleavage sequences, (b) cleaving into fragments said extension at cleavable polynucleotide sequences in the presence of means for specifically cleaving said cleavable polynucleotide sequences when said extension is hybridized with said site specific cleavage sequences, (c) dissociating said fragments, (d) hybridizing said fragments with single stranded pattern polynucleotide, and repeating steps (a)-(d). Steps (a)-(d) may be conducted simultaneously or wholly or partially sequentially.