Non-destructive method for applying and removing instrumentation on helicopter rotor blades
A nondestructive method of applying and removing instrumentation on airfoils.
Long, W. C.↗
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Cooling system for removing metabolic heat from an hermetically sealed spacesuit
An improved cooling and ventilating system is described for removing metabolic heat, waste gases and water vapor generated by a wearer of an hermetically sealed spacesuit. The cooling system was characterized by a body suit, having a first circuit for simultaneously establishing a cooling flow of water through the thorax and head sections of the body suit. Circulation patches were included mounted in the thorax section and head section of the body suit. A second circuit for discharing a flow of gas throughout the spacesuit and a disconnect unit for coupling the circuits with a life support system externally related to the spacesuit were provided.
Webbon, B. W.↗
Removal of atmospheric effects from satellite imagery of the oceans
The paper analyzes the effects of atmospheric and sea surface scattering on the determination of ocean color from satellite imagery and proposes an algorithm for removing a large portion of these effects. The algorithm is based on the observations that (1) the upward radiance from the unwanted photons can be divided into effects resulting from Rayleigh scattering alone and those resulting from aerosol scattering alone, (2) the aerosol scattering phase function should be nearly independent of wavelength, and (3) the Rayleigh component can be computed without a knowledge of the sea surface roughness. The ratio of the aerosol optical thickness at the wavelength of interest to the aerosol optical thickness at 750 nm is used in the algorithm since it is assumed that the ocean is totally absorbing in a band of wavelengths around 750 nm. The calculation of this ratio from satellite measurements alone and the accuracy of the procedure are considered.
Gordon, H. R.↗
The dependence of the CO2 removal efficiency of LiOH on humidity and mesh size
The effect of humidity on the CO2 removal efficiency of small beds of anhydrous LiOH has been studied. Experimental data taken in this small bed system clearly show that there is an optimum humidity for beds loaded with LiOH from a single lot. The CO2 efficiency falls rapidly under dry conditions, but this behavior is approximately the same in all samples. The behavior of the bed under wet conditions is quite dependent on material size distribution. The presence of large particles in a sample can lead to rapid fall off in the CO2 efficiency as the humidity increases.
Davis, S. H.↗
Removal of hydrogen bubbles from nuclear reactors
Method proposed for removing large hydrogen bubbles from nuclear environment uses, in its simplest form, hollow spheres of palladium or platinum. Methods would result in hydrogen bubble being reduced in size without letting more radioactivity outside reactor.
Jenkins, R. V.↗
Removing freon gas from hydraulic fluid
Dissolved freon gas is removed from hydraulic fluid by raising temperature to 150 F and bubbling dry nitrogen gas through it, even while fluid circulates through hydraulic system. Procedure reduces parts corrosion, sludge formation, and contamination.
Williams, B. B.↗
Regenerative CO2 removal for PLSS application
Various concepts for the design of the nonelectrochemical absorber were defined and evaluated. A preliminary design based on the use of hollow fiber membranes was developed. Small scale bench testing demonstrated the carbon dioxide removal capability and provided design data for scale-up to the one person level. A full scale conceptual design of the absorbent regeneration hardware using six electrochemical cells was also completed. The design was supported by single cell testing and showed that a full scale regeneration system, operating continuously over 24 hours, can regenerate the absorbent from one extravehicular activity mission. The single cell regeneration hardware was operated for over 800 hours.
Heppner, D. B.↗
Removing Defects From Silicon Ribbon
Proposal for removing impurities from silicon ribbon and sheet could be developed into an automated production-line process. New technique which combines ion-cluster bombardment, electron-gun heating, and plasma etching, could be key step in fabricating inexpensive solar-cell arrays. Silicon sheets and ribbons treated this way could have enhanced carrier lifetimes necessary for satisfactory solar-cell performance.
Shimada, K.↗
Safety Bolt Doubles as a Bushing-Removal Tool
Bushings fitted to close tolerances and limited access can be removed without damage to housing by using bolt with integrated locking dog. Such self-retaining positive - locking bolts are normally used as fasteners in critical joints where accidentally loosened bolt could cause damage or injuries.
Haverkamp, C. E.↗
Removing Chlorides From Metallurgical-Grade Silicon
Process for making low-cost silicon for solar cells is further improved. Silane product recycled to feed stripper column converts some of heavy impurities to volatile ones that pass off at top of column with light wastes. Impurities--chlorides of arsenic, phosphorus, and boron-would otherwise be carried to subsequent distillations where they would be difficult to remove. Since only a small amount of silane is recycled, silicon production efficiency remains high.
Breneman, W. C.↗
Membranes Remove Metal Ions Fron Industrial Liquids
Use of membrane films affords convenient and economical alternative for removing and recovering metal cations present in low concentrations from large quantities of liquid solutions. Possible applications of membrane films include use in analytical chemistry for determination of small amounts of toxic metallic impurities in lakes, streams, and municipal effluents. Also suitable for use as absorber of certain pollutant gases and odors present in confined areas.
Hsu, W. P. L.↗
Acoustic Methods Remove Bubbles From Liquids
Two acoustic methods applied to molten glass or other viscous liquids to remove bubbles. Bubbles are either absorbed or brought to surface by applying high-intensity Sonic field at resonant frequency. Sonic oscillation increases surface area of bubbles and causes them to dissipate.
Trinh, E.↗
Removal of drift from frequency stability measurements
A method of estimating frequency drift rate and removing its effect from Allan variance plots is given. When tried on a test of hydrogen masers, the methods gives consistent results. An error in the previous Allan variance computation algorithm is corrected.
Greenhall, C. A.↗
Advanced CO2 removal process control and monitor instrumentation development
A progam to evaluate, design and demonstrate major advances in control and monitor instrumentation was undertaken. A carbon dioxide removal process, one whose maturity level makes it a prime candidate for early flight demonstration was investigated. The instrumentation design incorporates features which are compatible with anticipated flight requirements. Current electronics technology and projected advances are included. In addition, the program established commonality of components for all advanced life support subsystems. It was concluded from the studies and design activities conducted under this program that the next generation of instrumentation will be greatly smaller than the prior one. Not only physical size but weight, power and heat rejection requirements were reduced in the range of 80 to 85% from the former level of research and development instrumentation. Using a microprocessor based computer, a standard computer bus structure and nonvolatile memory, improved fabrication techniques and aerospace packaging this instrumentation will greatly enhance overall reliability and total system availability.
Heppner, D. B.↗
Removing Images From Microfilm
Film softened, scraped, and then dried. Unwanted images removed from microfilm for softening base film with hot water, scraping film and drying with isopropyl alcohol. Method simple and no visible damage to film.
Taylor, L. L.↗
Removing Biostatic Agents From Fermentation Solutions
Liquid carbon dioxide inexpensive solvent. Inexpensive process proposed for removing such poisons as furfural and related compounds from fermentation baths of biomass hydrolysates. New process based on use of liquid carbon dioxide as extraction solvent. Liquid CO2 preferable to such other liquid solvents as ether or methylene chloride.
Du Fresne, E. R.↗
Removing Sulfur Dioxide From Flue Gases
In situ removal of SO2 in flue gases and fluidized-coal combustors, with no waste product possible using NaO/LiO as regenerable supported molten sorbent.
Gavalas, G. R.↗
Cost of phosphate removal in municipal wastewater treatment plants
Construction and operating costs of advanced wastewater treatment for phosphate removal at municipal wastewater treatment plants have been investigated on orders from the Federal Environmental Bureau in Berlin. Particular attention has been paid to applicable kinds of precipitants for pre-, simultaneous and post-precipitation as well as to different phosphate influent and effluent concentrations. The article offers detailed comments on determination of technical data, investments, capital costs, operating costs and annual costs as well as potential cost reductions resulting from precipitation. Selected results of the cost investigation are shown in graphical form as specific investments, operating and annual costs depending on wastewater flow.
Schuessler, H.↗