A set of Fortran IV subroutines for generating printed plots
Subroutines written in Fortran IV for generating printed plots as part of normal output
SUBROUTINE↗
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Projection transparencies from printed material
Method for preparing project transparencies, or view graphs, permits the use of almost any expendable printed material, pictures, charts, or text, in unlimited color or black and white. The method can be accomplished by either of two techniques, with a slight difference in materials.
Grunewald, L. S.↗
Standards for compatibility of printed circuit and component lead materials
Study of packaging of microminiature electronic components reveals methods of improving compatibility of lead materials, joining techniques, transfer molding concepts, printed circuit board materials, and process and material specifications.
Source record↗
Apollo communications system support. Improvements in contact printing and metal masking techniques Final report, 1 Aug. 1967 - 29 Mar. 1968
Production methods for contact prints in emulsions or chromium coated glass plate
Herman, D. S.↗
An on-line system for utilizing hand-printed input Progress report
Flow charts for recognizing hand printed characters on-line in real time operation
Bernstein, M. I.↗
Nondestructive evaluation of printed wiring boards by microhm resistance measurements
Application of the microhm measuring circuit to measurement of plated-through hole resistances, when combined with appropriate probes, provides data that can be related to the quality of copper plating on printed wiring boards. Acceptance limits can be established and continuous inspection performed, with plating defects causing abnormal readings.
Stiefeld, B.↗
Self-shielding printed circuit boards for high frequency amplifiers and transmitters
Printed circuit boards retaining as much copper as possible provide electromagnetic shielding between stages of the high frequency amplifiers and transmitters. Oscillation is prevented, spurious output signals are reduced, and multiple stages are kept isolated from each other, both thermally and electrically.
Galvin, D.↗
Design of printed circuit coils
Spiral-like coil is printed with several extra turns which increase the realizable coil inductance. Included are shorting connections which not only short the extra turns, but also short out several turns of the main body. Coil tuning is accomplished by removing the shorts until the desired inductance is obtained.
Higgins, W. T.↗
A set of 360 FORTRAN /level G or H/ subroutines for generating printed plots
FORTRAN 4 subroutines to generate printed plots as normal output
Dellner, L. T.↗
Development of Highly Reliable Soldered Joints for Printed Circuit Boards Final Report, 28 Jun. 1967 - 28 Jun. 1968
Highly reliable soldered joints for printed circuit boards
Source record↗
Mounting of components to printed wiring boards
Printed wiring board component mounting configurations to ensure successful solder terminations
Van Orden, E. R.↗
Entropy of printed matter at the threshold of legibility for efficient coding in digital image-processing
Printed matter as two dimensional, two valued, and stochastic process
Arps, R. B.↗
A new low-expansion nonflammable printed circuit board
Printed circuit board has a thermal coefficient of expansion similar to that of the electronic component leads. High-expansion composite materials are sandwiched between the outer layers of copper and woven fiber glass.
Kennedy, B. W.↗
A vapor barrier for cold testing printed circuit cards
Cold testing method prevents formation of frost on printed circuit boards and part holders during testing at sub-zero temperatures. Freon permits rapid attainment of the required testing temperature.
Cross, D. A.↗
Controlled etching of printed-circuit boards
Ferric chloride in an aqueous medium etches copper from the surface of printed-circuit boards. Ferric ions are reduced to ferrous ions resulting in a reduced etching rate.
Kovell, S. P.↗
Economical printed circuit front panel for computer use
Techniques for preparing printed circuit boards are used to provide an alternate method for producing panel symbology for ground computer test trap. After processing, the panel unit is either solder or gold plated.
Newman, J.↗
On-line parsing of hand-printed mathematical expressions Final report for phase 2
Computer program for analyzing hand printed mathematical expressions
Williams, T. G.↗
Investigation of Multilayer Printed Circuit Board Materials Final Report
Materials compatibility study for improved multilayer printed circuit board
Meinhard, J. E.↗