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[Minutes for the TXSSAR Annual Meeting: April 5 - 6, 1974]

Description: Minutes from an annual meeting of the Texas Sons of the American Revolution, held from April 5 through April 6, 1974 at the La Quinta Royale Mortor Inn, Corpus Christi, Texas, including a summary of activities and business discussed. The meeting was called to order by President Karl Wallace.
Date: April 1974
Creator: Sons of the American Revolution. Texas Society.
Partner: UNT Libraries Special Collections
open access

[Minutes for the TXSSAR Board of Managers Meeting: July 13, 1974]

Description: Minutes from a meeting of the TXSSAR Board of Managers, held on Saturday, July 13, 1974 at the Gay Hill, Texas, including a summary of activities and business discussed. The meeting was called to order and presided over by President Red, when the meeting was adjourned the members were delighted to a lunch prepared by Mrs. Red.
Date: July 13, 1974
Creator: Sons of the American Revolution. Texas Society.
Partner: UNT Libraries Special Collections
open access

[Minutes for the TXSSAR Board of Managers Meeting: April 5, 1974]

Description: Minutes from a meeting of the TXSSAR Board of Managers, held on April 5, 1974, in Corpus Christi, Texas., including a summary of activities and business discussed. The meeting was called to order and presided over by President Karl E. Wallace, Sr.
Date: April 1974
Creator: Sons of the American Revolution. Texas Society.
Partner: UNT Libraries Special Collections
open access

[Minutes for the TXSSAR Board of Managers Meeting: April 7, 1974]

Description: Minutes from a meeting of the TXSSAR Board of Managers, held on April 7, 1974, in Corpus Christi, Texas, including a summary of activities and business discussed. The date of the meeting had been crossed out twice, once replacing the date with March 31 and the other fixing the date to the original, April 7. The meeting was called to order by President Red and declared it to be a short one.
Date: April 1974
Creator: Sons of the American Revolution. Texas Society.
Partner: UNT Libraries Special Collections
open access

RIGID URETHANE FOAM BASED ON METHYLALPHA-(D)-GLUCOSIDE AND E-CAPROLACTONE

Description: A study was made of resins based on methyl-alpha-(D)-glucoside. Foams prepared using this resin and a prepolymer based on polymethylene polyphenyl isocyanate had excellent high temperature strength when tested At 400°F (301.1°C). Best results were obtained with methyl glucoside purchased as a 65-percent water solution containing 30 percent beta-methyl-glucoside.
Date: November 1, 1974
Creator: McFarland, J W
Partner: UNT Libraries Government Documents Department
open access

ROUND-WIRE LAMINATED FLAT CIRCUITS

Description: Round-wire, laminated flat cables provide an additional manufacturing capability that is particularly suited for development applications and few-of-a-kind production. These laminated cables do not require the special tooling that is necessary for molded cables; therefore, cost and lead time are reduced. Layup, lamination, and contouring techniques were developed for complex cable configurations, including small-radius bends and multiple breakouts.
Date: August 1, 1974
Creator: Hile, R A
Partner: UNT Libraries Government Documents Department
open access

Detection and Suppression of Transistor Oscillation During Power Burn-In

Description: A method has been developed for suppressing parasitic oscillation of transistors operating under test conditions through the use of ferrite cores and capacitors. The Hewlett-Packard Model 8554L spectrum analyzer is recommended for detecting unknown rf noise.
Date: September 1, 1974
Creator: Schmitt, R. W.
Partner: UNT Libraries Government Documents Department
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EFFECTS.OF BORIC ACID ON THE CURE OF BORON-FILLED Y-3602 SILICONE GUM

Description: The first two phases of a program designed to determine the effects of boric acid on the cure of Y-3602 silicone gum were conducted to evaluate extraction solvents and extraction time. The standard production formulation of B10-filled Y-3602 silicone gum was used in these evaluations. Results showed that the best solvent for reproducibility and high amine content was chloroform. The second phase indicated that extraction was essentially complete at the end of 4 hours.
Date: October 1, 1974
Creator: Leichliter, G E
Partner: UNT Libraries Government Documents Department
open access

ULTRASONIC WELDING OF ELECTRICAL TERMINATIONS

Description: Smooth weld tip and anvil surfaces are recommended; electrical discharge machining (EDM) surface finishes damage weld materials. Copper-to-aluminum samples showed no weld degradation following environmental tests. Materials must be of similar hardness to achieve high quality welds, and soft materials are sensitive to machine parameter changes.
Date: August 1, 1974
Creator: Darner, G S
Partner: UNT Libraries Government Documents Department
open access

MASS ANODIZATION OF TANTALUM-NITRIDE RESISTORS

Description: Mass anodization of tantalum-nitride films with sheet resistivities not exceeding 200 ohms per square to meet ±10-percent tolerance requirements on resistors above 100 ohms has been shown feasible. The anodization system that was developed for this study is capable of producing yields of approximately 80 percent under those conditiohs. Although anodization trimming on films with sheet resistivities as high as 600 ohms per square is now feasible, further work is necessary to successfully anodize… more
Date: September 1, 1974
Creator: Peltier, A J
Partner: UNT Libraries Government Documents Department
open access

Evaluation of a High Temperature Syntactic Foam

Description: The mechanical, physical, and thermal properties of a glass microballoon-filled polybenzimidazole resin have been measured for test specimens molded by three manufacturing processes. The material, Imidite X386, has been shown to be a high strength, thermally stable structural foam.
Date: August 1, 1974
Creator: McIlroy, H. M.
Partner: UNT Libraries Government Documents Department
open access

AUTOMATIC RADAR-SENSITIVITY MEASUREMENT

Description: This work resulted in development of the necessary techniques to automatically measure radar receiver and system sensitivity. Both measurement speed and repeatability are improved over that possible by manual methods. Combined logic and analog techniques were used to derive a system suitable for both in-process and final-assembly tests on radar systems and rf subassemblies.
Date: September 1, 1974
Creator: Hardinger, K E
Partner: UNT Libraries Government Documents Department
open access

USE OF EN-7 TO ENCAPSULATE ANALYZER ASSEMBLIES

Description: The feasibility of using EN-7 as a substitute for Adiprene L100 curing agent for analyzer encapsulation was investigated. Since many analyzer assemblies cannot tolerate the usual EN-7 cure temperatures, this investigation was limited to a maximum cure temperatureof 710°C. The results of these tests indicate that a 20-hour cure at 490°C is adequate to provide sufficient hardness if followed by additional room-temperature cure.
Date: September 1, 1974
Creator: Elmore, R D
Partner: UNT Libraries Government Documents Department
open access

A Rapid Tcr Test Method for Tantalum-Nitride Resistive Films

Description: Taking two resistance readings, at room temperature and at -196°C when the substrate is submerged in liquid nitrogen provides a convenient means of measuring the TCR of tantalum-nitride films. The liquid nitrogen provides a large, controlled temperature differential that can be used conveniently in the production environment. A digital-readout tester with only a simple nulling adjustment makes it possible to read the TCR of the film directly on the DVM indicator. This method provides the prompt… more
Date: October 1, 1974
Creator: Laudel, A.
Partner: UNT Libraries Government Documents Department
open access

TEMPERATURE DEPENDENT PROPERTIES OF POTTING MATERIALS

Description: The mechanical, electrical, and thermal properties of a general purpose epoxy potting compound, filled with either glass microspheres or aluminum oxide and catalyzed with either diethanolamine or Epon Z are discussed. Twelve formulation-cure cycle combinations were chosen for evaluation. The temperature properties from -65 to 400°F (-54 to 204°C) of four of the combinations are given. Modulus versus temperature polynomials were calculated for the diethanolamine catalyzed material.
Date: September 1, 1974
Creator: Walker, J M
Partner: UNT Libraries Government Documents Department
open access

DEFECT DETECTION IN HIGH-DENSITY BRAIDED SHIELDS

Description: A radiographic image analyzer and a modified shielded-enclosure leak-detection system were successful in determining the cable shield coverage and the freedom from leakage necessary to prevent interference caused by electromagnetic radiation pickup on interconnecting cables. Other systems are being considered, and further evaluation and refinement are necessary to provide reliable methods for in-process manufacturing tests and product analysis.
Date: October 1, 1974
Creator: Belarde, E
Partner: UNT Libraries Government Documents Department
open access

MAXIMUM HUMIDITY INDICATOR

Description: Moisture-sensitive systems to measure and indicate the maximum level of humidity exposure are discussed. A chemical indicator utilizing deliquescent salts and water-soluble dyes provides an irreversible color change at discrete levels of relative humidity. To provide indication of the time at which the exposure occurs, a circuit employing a resistive-type sensor was developed. A small, commercially available sensor is used in a portable probe to detect humidity leaks into controlled areas.
Date: October 1, 1974
Creator: Abel, W B
Partner: UNT Libraries Government Documents Department
open access

PLATING ON POLYIMIDE

Description: Electroless coatings of nickel and copper from five electroless solutions were deposited on polyimide. Thicknesses approaching 90 microinches (2.3 micrometers) could be obtained but increasing the coating thickness beyond 90 microinches could only be achieved by electroplating. Four etching solutions for polyimides were investigated to determine their effect on the adhesion of the electroless coating to the polyimide.
Date: August 1, 1974
Creator: Stimetz, C J
Partner: UNT Libraries Government Documents Department
open access

EFFECTS OF VARYING FORMULATIONS OF THREE TDI POLYURETHANE FOAMS

Description: Studies were conducted on three TDI polyurethane foam materials to improve production yields of molded-to-size parts. The effects of changes in cell. stabilizers, emulsifiers, catalysts, and the blowing agent were investigated. To evaluate formulation modifications, tests were performed to determine compressive strength, foam reactivity, and free-rise density. Changes in the visual appearance were also documented. Silicone surfactants were found to be superior to organic emulsifiers. In additio… more
Date: August 1, 1974
Creator: Taylor, R F & DeGisi, S L
Partner: UNT Libraries Government Documents Department
open access

PREPARATION OF A CTBN-MODIFIED EPOXY RESIN

Description: The chemistry of the various types of reactions possible between a carboxyl-terminated butadiene/acrylonitrile (CBTN) liquid copolymer and a diglycidyl ether of bisphenol A (DGEBA) type epoxy resin to prepare a CTBN/DGEBA adduct is discussed. Both a dilution and a non-dilution synthesis techniqu are described. Several properties of the CTBN precursor and the modified epoxy resin were determined and are presented.
Date: November 1, 1974
Creator: Smith, C H
Partner: UNT Libraries Government Documents Department
open access

IVESTIGATION OF POLYSULFIDE CONFORMAL COATING

Description: An investigation of the properties of foamed polysulfide (Thiokol) compounds revealed several properties which had previously escaped notice. These properties included lack of thermal stability, attack by hot epoxy resins, and differences among compounds prepared by different vendors. Details of these findings and their significance are discussed.
Date: March 1, 1974
Creator: Camp, C J
Partner: UNT Libraries Government Documents Department
open access

DEVELOPMENT OF A FORMING STATION

Description: A forming station has been designed and fabricated. The forming stations allow automatic control of the pressure, temperature, vacuum, and cooling cycles required for pressure/vacuum dies used to form or bond aluminum-Mylar laminate, Mylar films, and polycarbonate sheets.
Date: August 1, 1974
Creator: Sheeley, J D
Partner: UNT Libraries Government Documents Department
open access

Akha notebook 32

Description: Handwritten notes and transcription of a traditional narrative about a man with no wife. These notes were taken during sessions with Mae Kham, an Akha consultant from Thailand around 45 years old at the time.
Date: 1974
Creator: Hansson, Inga-Lill
Partner: UNT College of Information
open access

Akha notebook 35

Description: Handwritten notes and transcription of another version of the traditional narrative À Sjhag Sjhág about an old man. These notes were taken in Copenhagen during sessions with Akha consultant Àle Dzò Dang from Burma.
Date: 1974
Creator: Hansson, Inga-Lill
Partner: UNT College of Information
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