Abstract: Apparatus and method for stabilizing and supporting a crystal semiconductor rod during fabrication refining from the action of a seed rod on a float zone melt of a crystalline rod source is provided wherein engageable fingers mounted in a vertically movable tube in axial register with the shaft holding the crystal seed rod are pivotally mounted in a non-horizontal upward position, the finger tips being force loaded for inward movement upon removal of a sleeve carrier so that the fingers engage, support, and stabilize the irregular cylindrical surface of the refined semiconductor rod. The tube and fingers are engageable through sleeve and tube piston means resulting in uniform stabilization and support of the crystal refined rod. The apparatus and method prevent the refined rod from vibrating and oscillating about its axis; thus allowing enlarged dislocation free crystal rod growth from a crystalline rod source, said refined crystal rod being grown on a slender seed rod.

Abstract: In crystal growing apparatus in which a crystal is vertically pulled from an electric heated melt the weight of the crystal is measured by a load cell whose output is compared with an expected function to form a control loop for controlling heater power, the improvement comprises a correction circuit for applying to the control loop a signal compensating for a time differential (.lambda.a) of an error signal in the load cell output. The correction circuit may be a feedback or a feed forward loop.

Abstract: A single crystal of yttrium-iron garnet or solid solution comprising aluminum oxide component, gallium oxide component, iron oxide and/or the other rare earth oxide component is produced by a floating zone method.

Abstract: Apparatus for introducing and mixing a first liquid with a second liquid in which use is made of a spinning disc for throwing droplets of the first liquid centrifugally outwardly, and an agitator immersed at least partially in the body of the second liquid, spaced below the spinning disc, and displacing second liquid upwardly and outwardly from the body of liquid to intersect the droplets of first liquid thrown from the spinning disc for admixture above the body of the second liquid.

Abstract: Apparatus is disclosed for treating pickling solutions used for pickling metal, such as iron, steel, special alloys, or the like. In a preferred embodiment, the apparatus includes an evaporator, a condensor, a crystallizer, a crystal-separating device, fittings and conduits for connection to the metal-treating plant, and a device for automatically controlling the evaporation rate in the evaporator. The evaporator includes a flow channel, vapor removal connection above the liquid level in the flow channel, an inlet and outlet for the solution being treated, and a plurality of electrodes for directly applying AC current to the solution. The electrodes are mounted spaced along the length of th flow channel and are completely covered by the solution so as to be out of contact with the vapor. The crystallizer comprises an upright cylindrical vessel having an inlet and an outlet, a driven shaft extending in the center line of the vessel, and is provided with radial ribs.

Abstract: Disclosed is a method of producing metal halide and metal chalcogenide crystals for infrared window application which exhibits a high conversion ratio.

Abstract: A catheter insertion device (10) is disclosed which is usable to insert a very flexible catheter (12) formed of a silicone elastomer into the blood vessel of a patient. Catheters of highly flexible material, such as silicone elastomer, are highly desirable for use as such catheters in that they do not initiate a build-up of fibrin in the blood stream as do other, more rigid, catheters. A hub member (18) is slidably received over a needle (14) carrying the catheter (12) and a semi-rigid sleeve (26) extends under the proximal end of the catheter (12) so as to aid in removing the catheter (12) from the needle (14) after the needle (14) has been inserted into the blood stream of the patient.

Abstract: An aqueous pulp or slurry containing cement copper particles is treated with conditioner and hydrophobic bridging liquid to form agglomerates of the cement copper particles, which agglomerates are then separated from the aqueous phase.

Abstract: The invention provides a process wherein a mixture prepared from starting materials comprised of P.sub.2 S.sub.5 of high reactivity and low reactivity, respectively, is converted to phosphorus pentasulfide of predetermined reactivity lying between that of the high reactivity P.sub.2 S.sub.5 and that of the low reactivity P.sub.2 S.sub.5 starting materials. To this end, the starting materials are mixed in quantitative proportions which are selected in accordance with the respective reactivity of the starting materials and the resulting mixture is ground.

Abstract: A method of preparing epitaxial thin films of metallic rare earth garnets by chemical vapor deposition utilizes organometallic ligand compounds of rare earth metals including scandium, yttrium, lanthanum and the lanthanides (Z=58 through 71) with organic compounds including acetylacetone, benzoylacetone, thenoyl trifluoroacetone, fluorinated benzoylacetone, tri-n-butylphosphate, tri-n-octylphosphine oxide and sodium cyclopentadienide and 2,2,6,6-tetramethyl 3,5-heptanedione.

Abstract: Single crystals of alpha aluminum phosphate of high crystal perfection are rown from seeded solutions of aluminum orthophosphate and orthophosphoric acid in such a manner as to provide direct visual observation of the crystal growth process and allow precise determination of nucleation and growth kinetics.The method involves sealing the seeded solution in clear quartz ampules, inserting the ampules into a precisely temperature controlled silicone oil bath, increasing the temperature of the silicone oil bath from ambient temperature to approximately 150 degrees C. over a three hour period, programming the temperature of the bath upward at the rate of 0.1 to 2.0 degrees C. per day for periods up to sixty days, and removing the quartz ampules from the silicone oil bath and quickly cooling and removing the crystals.

Abstract: The disclosure is directed to a double crucible Czochralski crystal semiconductor growing apparatus (10). An inner crucible (14) floats in a melt within an outer crucible (13) and a single crystal semiconductor billet (23) is pulled from the melt (16) in the inner crucible. An elongated tubular member (26), having at least one small aperture (33) in the wall thereof, provides a channel between the outer and inner crucibles. The tubular member (26) permits flow of the melt in the outer crucible (14) to the inner crucible (13) while inhibiting the diffusion of dopant material from the inner to outer crucible while any gas in the member will pass through the aperture (33).

Abstract: A battery of horizontal coke ovens having intermediate walls that divide the ovens into units each consisting of 10-20 oven chambers for the purpose of receiving coal from a charging car displaceable above each unit of oven chambers. The charging car includes a plurality of bins each having an outlet for alignment with one of a plurality of charging holes provided in the roof for each oven chamber. The charging car is transversed along a frame supported by vertical beams extending from the intermediate walls. A conveyor belt is employed to transport coal from a tower to the charging car.