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Briefs: Mechanical & Fluid Systems
The balanced-piston relief valve with side vented reaction cavity has been proposed as an improved alternative to a conventional high- pressure, high-flow relief valve. As explained...
Briefs: Mechanical & Fluid Systems
Using Composite Materials in a Cryogenic Pump
Several modifications have been made to the design and operation of an extended-shaft cryogenic pump to increase the efficiency of pumping. In general, the efficiency of pumping a cryogenic fluid is limited by thermal losses (the thermal energy that the pump adds to the fluid). The sources of the...
Briefs: Mechanical & Fluid Systems
Safety Modification of Cam-and-Groove Hose Coupling
A modification has been made in the mating halves of a cam-and- groove hose coupling to prevent rapid separation of the halves in the event that the cam levers are released while the fluid in the hose is pressurized. This modification can be duplicated on almost any commercially available cam-and-...
Briefs: Medical
It has been proposed to develop special-purpose electronic noses and algorithms for processing the digitized outputs of the electronic noses for determining whether tissue exposed...
Briefs: Medical
Producing Newborn Synchronous Mammalian Cells
A method and bioreactor for the continuous production of synchronous (same age) population of mammalian cells have been invented. The invention involves the attachment and growth of cells on an adhesive-coated porous membrane immersed in a perfused liquid culture medium in a microgravity analog...
Briefs: Physical Sciences
Scintillation-based fast-neutron detectors that are smaller and less power-hungry than mainstream scintillation-based fast-neutron detectors are undergoing development. There are...
Briefs: Physical Sciences
An instrument for rapidly measuring the electric charges and sizes (from ≈1 to ≈100 μm) of airborne particles is undergoing development. Conceived for monitoring atmospheric dust particles on Mars, instruments...
Briefs: Physical Sciences
A proposed instrument for measuring a static electric field would be based partly on a conventional rotating- split-cylinder or rotating-split-sphere electric-field mill. However, the design of the...
Briefs: Physical Sciences
A method of real-time quantification of the hardness of a rock or similar material involves measurement of the temperature, as a function of time, of the tool bit of an...
Briefs: Information Technology
A method of accelerating and facilitating production of video and film motion- picture products, and software and generic designs of computer hardware to implement the method, are...
Briefs: Mechanical & Fluid Systems
FIDO-Class Development Rover
A report describes a rover-type robotic wheeled vehicle recently built for use as a testbed for development of software for future rover-type vehicles. This vehicle is a derivative of the Field Integrated Design and Operations (FIDO) rover, which is a prototype Mars- exploration rover that also serves as a terrestrial...
Briefs: Electronics & Computers
Tone-Based Command of Deep Space Probes Using Ground Antennas
A document discusses a technique for enabling the reception of spacecraft commands at received signal levels as much as three orders of magnitude below those of current deep space systems. Tone-based commanding deals with the reception of commands that are sent in the form of precise...
Briefs: Electronics & Computers
A proposed torque sensor would be capable of operating over the temperature range from 1 to 400 K, whereas a typical commercially available torque sensor is limited to the narrower temperature...
Briefs: Electronics & Computers
A proposed brushless shaft-angle sensor for use in extreme cold would offer significant advantages over prior such sensors:
It would be capable of operating in extreme cold; and
Its...
Briefs: Physical Sciences
Optical Pressure-Temperature Sensor for a Combustion Chamber
A compact sensor for measuring temperature and pressure in a combustion chamber has been proposed. Heretofore, independent measurements of high pressures and temperatures in combustion chambers have not been performed. In the original intended application, the combustion chamber would be...
Briefs: Physical Sciences
An automated ground facility, for vicarious radiometric calibration of airborne and spaceborne sensors of visible and infrared light has been established. In the term “vicarious...
Briefs: Electronics & Computers
Electronic sensor systems for detecting and locating impacts of rapidly moving particles on spacecraft have been invented. Systems of this type could also be useful on Earth in settings in which the occurrence of...
Briefs: Semiconductors & ICs
An effort to extend the low-temperature operational limit of supercapacitors is currently underway. At present, commercially available non-aqueous supercapacitors are rated for a minimum operating temperature of...
Briefs: Semiconductors & ICs
A method of fabricating Bi2–xSbxTe3-based thermoelectric microdevices involves a combination of (1) techniques used previously in the fabrication of integrated circuits...
Briefs: Semiconductors & ICs
Figure 1 depicts a monolithic microwave integrated-circuit (MMIC) single-stage amplifier containing an InP-based high- electron-mobility transistor (HEMT) plus coplanar-waveguide (CPW)...
Briefs: Electronics & Computers
A design modification and a fabrication process that implements the modification have been conceived to solve two problems encountered in the development of...
Briefs: Test & Measurement
Hollow-core, periodic bandgap (HCPBG) flexible waveguides have been proposed as a means of low-loss transmission of electromagnetic signals in the frequency range from about 300 GHz to 30 THz. This...
Briefs: Manufacturing & Prototyping
An improved method of filling a molding flask with sand and compacting the sand around a refractory- coated foam mold pattern has been developed for incorporation into the lost-foam...
Briefs: Manufacturing & Prototyping
A nominally stationary tubular probe denoted a telescopic probe has been developed as an improved alternative to a prior movable probe used to evaluate the local degree of compaction of mold...
Briefs: Materials
Polymer-based composite catholyte structures have been investigated in a continuing effort to increase the charge/ discharge capacities of solid-state lithium thin-film electrochemical...
Briefs: Materials
Using ALD To Bond CNTs to Substrates and Matrices
Atomic-layer deposition (ALD) has been shown to be effective as a means of coating carbon nanotubes (CNTs) with layers of Al2O3 that form strong bonds between the CNTs and the substrates on which the CNTs are grown. It should also be possible to form strong CNT/ substrate bonds using other coating...
Briefs: Materials
Ceramic thermal and environmental barrier coatings (T/EBCs) that contain multiple layers of alternating chemical composition have been developed as improved means of protecting underlying...
Briefs: Mechanical & Fluid Systems
A variable-structure control system designed to enable a fuselage-heavy airplane to recover from spin has been demonstrated in a hand-launched, instrumented model glider airplane (see...
Briefs: Mechanical & Fluid Systems
Axial Halbach magnetic bearings have been investigated as part of an effort to develop increasingly reliable noncontact bearings for future high-speed rotary machines that may be used in such applications as...
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