Prevention, Detection, and Suppression of Hydrogen Explosions in Aerospace Vehicles
Prevention, detection, and suppression of hydrogen explosions in aerospace vehicles
AEROSPACE VEHICLE↗
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Results for “preventative”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Undercoat prevents blistering of silver plating at elevated temperatures
Gold undercoat prevents blistering in the silver plating of Inconel 718 seals from steam at high temperatures. The undercoat is diffused into the surface of the parent metal by baking prior to silver plating.
Kuster, C. A.↗
Toroidal ring prevents gas ignition at vent stack outlet
Torodial ring welded to the vent stack outlet prevents static discharges which ignite combustible gases in a venting system. The ring inhibits the flow of current by removing the cause of turbulence characteristics of a sharply defined vent exit.
Spring, T. R.↗
Apparatus for fabrication of americium- beryllium neutron sources prevents capsule contamination
Modified gloved enclosure is used to fill a capsule with a mixture of americium and beryllium radioactive powders to seal weld the opening, and to test it for leaks. It contains a horizontal partition, vortex mixer, mounting press, welder, test vessel, and radiation shielding to prevent surface contamination.
Mohr, W. C.↗
Limit circuit prevents overdriving of operational amplifier
Cutoff-type high gain amplifier coupled by a diode prevents overdriving of operational amplifier. An amplified feedback signal offsets the excess input signal that tends to cause the amplifier to exceed its preset limit. The output is, therfore, held to the set clamp level.
Openshaw, F. L.↗
Test device prevents weld joint damage by eliminating axial pin forces on unpotted modules
Test device makes electrical connection to pins on unpotted electronic modules without introducing any displacing forces of the pins, thus preventing weld joint damage. The pins are spaced in a potting header, but are free to slide in and out except for restraint from welded wire joints.
Cree, R. E.↗
Method prevents secondary radiation in radiographic inspection
Thin-walled neoprene containers prevent secondary radiation, scatter, and undercut during radiographic inspection. The containers are filled with a mixture of barium sulfate, red lead, and petroleum jelly that achieves the required absorption rate.
Struckus, A. A.↗
Accumulator isolator prevents malfunctioning of faulty hydraulic system
Special isolator valve prevents malfunction of a closed hydraulic system by converting the initial accumulator-reservoir to a reservoir function only when the system loses oil, or gaseous nitrogen precharge, or has a jammed piston. This permits near-normal operation until the defect is corrected.
Walsh, G. D.↗
Adaptive control circuit prevents amplifier saturation
Adaptive control circuit prevents saturation of push-pull output amplifiers used in low-power, low-torque suspension system. The adaptive control circuit senses how near the output amplifiers are to saturation and sets the B voltage in such a way as to keep them just clear of saturation.
Nondsieck, A. J.↗
A study of the possible preventive effects of muscular exercises and intermittent venous occlusion on the cardiovascular deconditioning observed after 10 days bed recumbency - Experimental design
Experiment designed to study preventive effects of muscular exercises on intermittent venous occlusion on cardiovascular deconditioning observed after 10 days bed recumbency
BED REST↗
Prevention of the adverse effect of hypokinesia on the human cardiovascular system
Prevention of adverse effect of hypokinesia on human cardiovascular system in space flight by physical exercise, rhythmic compression of limbs, drugs, and moderate hypoxia
HYPOXIA↗
Prevention of protein denaturation during exposure to sterilization temperatures.
Luciferase denaturation prevention using vacuum and molecular sieve during sterilization temperature exposure
ENZYME↗
Effectiveness of extremity cuffs or leotards in preventing or controlling the cardiovascular deconditioning of bedrest.
Extremity cuffs or leotards effect in preventing or controlling cardiovascular deconditioning of bed rest
BED REST↗
The prevention of transmission buffer overflow in telemetry data compressors.
Transmission buffer overflow prevention in telemetry data compressors using adaptive queueing control system
ADAPTIVE CONTROL SYSTEM↗
Magnetically controlled torque wrench prevents overtorquing
Magnetically controlled torque wrench produces the required torque values accurately, and prevents overtorquing. The force between a magnet and a soft iron bar on the arms of the wrench constitutes a predetermined maximum torque that cannot be exceeded. So long as the magnetic flux remain constant, the torque remains the same.
Rohrer, J. A.↗
Machining technique prevents undercutting in tensile specimens
Machining technique prevents undercutting at the test section in tensile specimens when machining the four corners of the reduced section. Made with a gradual taper in the test section, the width of the center of the tensile specimen is less than the width at the four corners of the reduced section.
Moscater, R. E.↗
Fiber glass prevents cracking of polyurethane foam insulation on cryogenic vessels
Fiber glass material, placed between polyurethane foam insulation and the outer surfaces of cryogenic vessels, retains its resilience at cryogenic temperatures and provides an expansion layer between the metal surfaces and the polyurethane foam, preventing cracking of the latter.
Forge, D. A.↗
Planetary quarantine - Techniques for the prevention of contamination of the planets by unsterile spaceflight hardware
Techniques for sterilization of planetary probes and landers to prevent contamination of exobiological instrumentation, tests, and planetary biospheres
Craven, C. W.↗