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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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Hand tool forms right angles in electronic component leads so they fit the spaced holes of a printed circuit board. This tool firmly holds the leads at points near the component ends to prevent damage and provide accuracy.
Simple, rapid method measures the surface area of a pattern such as comprised by the conductors on a printed circuit board. A negative or positive film of the circuit layout is placed over a uniformly illuminated translucent surface and the proportion of light transmitted to silicon solar cells is determined.
Axial transverse laminography and mutual coupling nondestructive techniques for inspection of multilayer printed circuit boards
Soldering fixture, designed for printed circuit cards, is a basic bench-mounted, self-contained integral unit combining all soldering needs into a compact, readily available work station. All tools, materials, and accessories are available to provide an ideal station to perform critical soldering.
Effect of clothing on control of microorganism shedding from worker constructing printed circuit board assembly
High speed selective recording system /SRS/ for data acquisition without computer, noting transistorized printed circuit logic modules
Thin film conformal coatings for environmental, handling, reliability and insulation protection of printed circuit boards
Continuous scanning X ray laminograph for nondestructive testing of multilayer printed circuits
Device for nondestructive testing of soldered joints correlates stress with load to predict printed circuit board lifetime.
Printed circuit board design allows for thermal stressing of the soldered joints during many thermal cycles. Components' leads should be cleaned, tinned, and freed of particles that prevent solder adherence, have a thin conformal coating, and have an air space between the coating and the body of the component.
Test trap consists of logic nest of five printed circuit boards, plus power supply within the unit. Device monitors more than one logic area simultaneously, gives visual display of detected error, operates at computer speed, maintains readily available logic description of cards used, and is compatible with existing computer circuitry.
Conductor to terminal soldering and printed circuit soldering for Earth Resources Technology Satellite
Postsoldering cleaning agent evaluation for compatibility with printed circuit board assembly materials
Preamplifier-discriminator-gate generator in printed circuit for use with photomultipliers, noting pulse sensitivity and cost
Electrical spot terminal assembly for printed circuit boards
Improved electrical spot terminal has been developed which can be rigidly attached to terminal mounting board. Mounting board is bonded to epoxy board which in turn is bonded to printed circuit board with high temperature adhesive. Conductive lead is coupled between electrical terminal and circuit trace on circuit board. Shape is usually clover-leaf.
Development of magnetic probe for nondestructive testing of multilayer printed circuit boards to determine existence of opens or shorts is reported. Components of probe are described and procedures for operation are discussed. Two illustrations are provided to show magnetic circuits and principles of operation.
A description is given of a wide dynamic range pulse height analyzer system developed for use on High Energy Cosmic Ray Experiment (HECRE) Balloon Flights. A wide dynamic range of 100,000 is obtained by extending the range of a basic 1024 channel analyzer through the use of multiple ranges and range selection. The system described here contains four 100,000 pulse height analyzers. Each 100,000 pulse height analyzer consists of a group of cordwood welded modules mounted and interconnected on a printed circuit card. Four of these card assemblies, the required clock drive circuitry (discrete components mounted and interconnected on a separate card) and three input-output connectors are interconnected and mounted on the system board.