Economical and maintenance-free gas system operates railroad switches
Remote control system that uses bottled nitrogen as a power source operates infrequently used railroad switches. This system is economical and maintenance free.
Vissing, G. S.↗
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Results for “SWITCHING”
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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Optically driven switch turn-off time reduced by opaque coatings
Turn-off response time of an optically driven switch is reduced by placing an opaque covering over the passivating silicon dioxide members. The coating prevents photon absorption so that carriers are not trapped or stored on the base region, thus shortening turn-off time.
Source record↗
Switching mechanism senses angular acceleration
Switching mechanism actuates an electrical circuit when a predetermined angular acceleration and displacement are reached. A rotor in the mechanism overcomes the restraint of a magnetic detent when the case in which the detent is mounted reaches the predetermined angular acceleration.
Source record↗
Safety switch permits emergency bridge crane shutdown
Safety switch on a crane control pendant must be held closed to operate the crane. This provides for immediate power cutoff to the crane in an emergency or a pendant circuit failure.
Long, E. J. R.↗
Magnetically operated limit switch has improved reliability, minimizes arcing
Limit switch for reliable, low-travel, snap action with negligible arcing uses an electrically nonconductive permanent magnet consisting of a ferrimagnetic ceramic and ferromagnetic pole shoes which form a magnetic and electrically conductive circuit with a ferrous-metal armature.
Steiner, R.↗
Electrically controlled optical latch and switch requires less current
Electrically controlled optical latch consists of a sensitive phototransistor and a solid-state light source. This design requires less current to activate an optically activated switch than in prior art.
Pieczonka, W. A.↗
Video signal processing system uses gated current mode switches to perform high speed multiplication and digital-to-analog conversion
Video signal processor uses special-purpose integrated circuits with nonsaturating current mode switching to accept texture and color information from a digital computer in a visual spaceflight simulator and to combine these, for display on color CRT with analog information concerning fading.
Gilliland, M. G.↗
Preregulator feedback circuit utilizes Light Actuated Switch
Preregulator feedback circuit employing a Light Actuated Switch /LAS/ provides a simple and efficient feedback device in a power supply preregulator which maintains dc isolation between input and output grounds. The LAS consists of a diode PN junction infrared source close to, but electrically isolated from, a photodetector.
Hayser, T. P.↗
Power switching in digital systems
Power gain in spacecraft power supply obtained by switching off digital computer system
DIGITAL COMPUTER↗
Realization of Boolean functions and variables on contactless logic switches by the method of redefinition
Realization of Boolean functions and variables on contactless logic switches by method of redefinition
RELAY↗
Q switching of molecular laser transitions.
Q-switching of carbon dioxide and nitrous oxide gas laser transitions
GAS LASER↗
Vibrational and rotational studies using Q switching of molecular gas lasers.
Vibrational and rotational relaxations in carbon dioxide and nitrous oxide laser systems, using Q- switching techniques
GAS LASER↗
Computer program detects transient malfunctions in switching circuits
A program which accepts a system model in the form of Boolean equations and solves these equations using a ternary algebra will determine the response of large combinational and sequencial switching circuits to given input changes, taking into account malfunctions due to races, hazards, and oscillations.
Calvin, E. L.↗
Integrator can easily be set and reset with an electronic switch
Electronic switch sets and resets integrator circuit to some initial condition using a grounded capacitor. This circuit also uses four equal resistors and an operational amplifier.
Deboo, G. J.↗
Switching-type regulator circuit has increased efficiency
Switching series regulator circuit uses an inductive network to feed most of the current applied to the control circuit to the load. This circuit eliminates resistive losses and the need for heat sinks.
Clapp, W. M.↗
SiC/Si diode trigger circuit provides automatic range switching for log amplifier
SiC/Si diode pair provides automatic range change to extend the operating range of a logarithmic amplifier-conversion circuit and assures stability at or near the range switch-over point. the diode provides hysteresis for a trigger circuit that actuates a relay at the desired range extension point.
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Simplified technique demonstrates magnetic domain switching
Light from a conventional photographic light source is polarized and projected through thin samples of gadolinium iron garnet and then observed with a conventional polarizing microscope. A distinctive change in color from red to yellow is observed as the magnetic domains are switched.
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Automatic transducer switching provides accurate wide range measurement of pressure differential
Automatic pressure transducer switching network sequentially selects any one of a number of limited-range transducers as gas pressure rises or falls, extending the range of measurement and lessening the chances of damage due to high pressure.
Yoder, S. K.↗