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1954

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Articles 1 - 30 of 111

Full-Text Articles in Engineering

An Analysis Of A Shunt-Peaked Video Amplifier And Feedback Pair Having The Same Edge Response, Bernard J. Regenauer Dec 1954

An Analysis Of A Shunt-Peaked Video Amplifier And Feedback Pair Having The Same Edge Response, Bernard J. Regenauer

Electrical and Computer Engineering ETDs

Statement of the problem. It is the purpose of this study (1) to investigate the feasibility of employing a feedback pair instead of a shunt-peaked video amplifier in a typical circuit application; (2) to determine the steady-state gain ratio between a feedback pair and a single shunt-peaked video amplifier having the same edge response (rise time and overshoot) and to analyze the effect of varying either the rise time or overshoot of both circuits upon this ratio; (3) to make a limited study of the steady state gain ratio of a feedback pair and a cascade of two shunt-peaked video ...


An Electro-Magnetic Pump And Heating Transformer For High Temperature Liquid Metals, G. R. Winders, R. W. Fisher Dec 1954

An Electro-Magnetic Pump And Heating Transformer For High Temperature Liquid Metals, G. R. Winders, R. W. Fisher

Ames Laboratory ISC Technical Reports

Details of a linear electro-magnetic induction pump and heating transformer for circulating Mg-Th alloy at 1000°C are given.


An Investigation Of The Binding Properties Of Limestone Dust, William E. Howard, Ellis G. Williams Dec 1954

An Investigation Of The Binding Properties Of Limestone Dust, William E. Howard, Ellis G. Williams

Kentucky Transportation Center Research Report

A proper quantity of dust particles of various sizes has long been recognized as important in the construction of stone bases and pavements. Screenings for water bound macadam bases are required to contain not less than a specified amount of dust sizes, and dense-graded limestone bases have controlling limits for the dust fraction. It is generally assumed that these particles serve a dual purpose: (1) in filling void spaces created by larger particles, thus enhancing the gross structure of the aggregate, and (2) in acting as a binder material in the presence of water. Furthermore, it has been demonstrated that ...


Inspection Of Full Depth Modified Dense-Graded Aggregate Base, Plant Mixed (Tennessee Project), William B. Drake Dec 1954

Inspection Of Full Depth Modified Dense-Graded Aggregate Base, Plant Mixed (Tennessee Project), William B. Drake

Kentucky Transportation Center Research Report

No abstract provided.


Application Of Wire Mesh Reinforcement To Asphaltic Concrete Pavement Overlays, Ellis G. Williams Dec 1954

Application Of Wire Mesh Reinforcement To Asphaltic Concrete Pavement Overlays, Ellis G. Williams

Kentucky Transportation Center Research Report

In response to suggestions from the Wire Reinforcement Institute, the Department established during the past construction season some test sections to investigate wire mesh reinforcement in bituminous concrete. As in the case of most similar projects in other states, the intent was to determine the effectiveness of wire mesh for controlling "reflection cracking" in bituminous overlays placed on existing portland cement concrete pavement.


Roughness As A Factor In Culvert Hydraulics, Eugene M. West Dec 1954

Roughness As A Factor In Culvert Hydraulics, Eugene M. West

Kentucky Transportation Center Research Report

In conjunction with the oral discussion of Roughness as a Factor in Culvert Hydraulics, which has been scheduled for the coming meeting of the Research Committee, I have assembled a few notes and diagrams with which you may wish to become familiar. It is intended that this material serve as a guide in a simplified approach to some of the basic considerations in the analysis of culverts, and not to be all inclusive.


Studies Of The Suitability Of Expanded Shale Aggregate For Use In Cement Concrete, Claude M. Brown Jr., Loren H. Strunk, Dave H. Sawyer Dec 1954

Studies Of The Suitability Of Expanded Shale Aggregate For Use In Cement Concrete, Claude M. Brown Jr., Loren H. Strunk, Dave H. Sawyer

Kentucky Transportation Center Research Report

Expanded shale is one of several artificial lightweight aggregates currently used in the production of lightweight concrete. Its use has become rather widespread through recent improvements in production techniques, mix designs, placement methods, and air entrainment. However, various types of lightweight concrete as such is not of recent origin, having been used in this country for more than a half century.

Expanded shale aggregates are produced by heating a suitable shale to the point of fusion. Gases within the shale expand and thus form thousands of tiny air cells within the mass which are retained upon cooling and solidification. The ...


An Investigation Of Bituminous Coatings And Pavements On Corrugated Metal Culverts, Eugene M. West Nov 1954

An Investigation Of Bituminous Coatings And Pavements On Corrugated Metal Culverts, Eugene M. West

Kentucky Transportation Center Research Report

The object of this inspection was to determine the efficacy of bituminous coatings and paved inverts on corrugated metal pipe and culverts installed on Rural Secondary Projects during the past few years. The study originated after earlier investigations had led to recommendations concerning the resistance of various types of pipe and culvert materials in the presence of acid-bearing waters.


News Bulletin - November-December, 1954, Civil Aviation Medical Association Nov 1954

News Bulletin - November-December, 1954, Civil Aviation Medical Association

Browse all Civil Aviation Medical Association Newsletters

A 13 page newsletter of the Airline Medical Examiners Association which was published on an irregular basis from 1950-1957. This organization was a predecessor of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.


Test 530: David Brown Model 25 (Gasoline), Tractor Museum Nov 1954

Test 530: David Brown Model 25 (Gasoline), Tractor Museum

Nebraska Tractor Tests

This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a ...


Test 528: John Deere 70 Diesel, Tractor Test Museum Oct 1954

Test 528: John Deere 70 Diesel, Tractor Test Museum

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT: John Deere 70 Diesel TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear. This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker ,point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated. BELT HORSEPOWER ...


Test 527: Oliver Super 88 Diesel Oct 1954

Test 527: Oliver Super 88 Diesel

Nebraska Tractor Tests

No abstract provided.


Blown Mulch For Roadside Erosion Control, Jason C. Taylor Oct 1954

Blown Mulch For Roadside Erosion Control, Jason C. Taylor

Kentucky Transportation Center Research Report

In May 1954, the Division of Construction brought to the attention of the Research Division the fact that an effort was being made (for the first time in Kentucky) to revise the conventional manner of applying straw mulch to a seeded right-of-way. This innovation was to be achieved with the use of a recently-invented machine known as the "Finn Mulch Spreader", which is capable of mixing a straw mulch with some adhesive substance and then blowing the mixture onto the seeded area. The intent was to achieve a reasonably homogeneous mat-like structure composed of pieces of straw attached to each ...


Test 526: Oliver Super 55 Diesel Sep 1954

Test 526: Oliver Super 55 Diesel

Nebraska Tractor Tests

No abstract provided.


Test 524: Oliver Super 55 Sep 1954

Test 524: Oliver Super 55

Nebraska Tractor Tests

No abstract provided.


Test 525 Oliver Super 88 Sep 1954

Test 525 Oliver Super 88

Nebraska Tractor Tests

No abstract provided.


A Countercurrent Liquid-Liquid Extractor, Harley A. Wilhelm, Raymond A. Foos Sep 1954

A Countercurrent Liquid-Liquid Extractor, Harley A. Wilhelm, Raymond A. Foos

Ames Laboratory ISC Technical Reports

A novel countercurrent liquid-liquid extractor is presented and illustrated with applications. The apparatus consists essentially of an assembly of mixer-settlers, feeders, reservoirs, and flow lines that are made of glass or other chemical resistant materials. In operation this multistage assembly rotates intermittently in one direction on a horizontal axis causing the immiscible phases to progress to opposite ends of the unit. Details for the construction of the extractor and its principles of operation are given. Extractors of this design are applicable to experimental work and to the preparation of pure compounds in quantity.


Improved Calcium Fluoride Shapes, D. R. Wilder, E. S. Fitzsimmons Sep 1954

Improved Calcium Fluoride Shapes, D. R. Wilder, E. S. Fitzsimmons

Ames Laboratory ISC Technical Reports

The properties of calcium fluoride are discussed with relation to utilization in refractory crucibles or liners. Conventional methods of slip casting and dry pressing are found to be practical. Expansion, shrinkage, density, and porosity characteristics of the fired material are considered.


Caustic Treatment Of Zircon Sand, G. H. Beyer, D. R. Spink, J. B. West, H. A. Wilhelm Aug 1954

Caustic Treatment Of Zircon Sand, G. H. Beyer, D. R. Spink, J. B. West, H. A. Wilhelm

Ames Laboratory ISC Technical Reports

Interest in zirconium as a structural material for nuclear reactors has focused attention on producing this metal more cheaply in a high state of purity. The use of zirconium in nuclear reactors requires the removal of the 1 to 3 per cent hafnium associated with zirconium in all naturally occurring ores. To remove the hafnium and to realize the corrosion resistance of the pure metal require rather elaborate chemical processing. The chemistry of zirconium is complex and incompletely understood, but advances within the last few years have transformed zirconium from a laboratory curiosity to a potentially important metal.


Test 523: Harris Four-Wheel-Drive Model Fdw-C, Tractor Museum Aug 1954

Test 523: Harris Four-Wheel-Drive Model Fdw-C, Tractor Museum

Nebraska Tractor Tests

This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a ...


Calorimetric Measurements On High Purity Iron And Eutectoid Steels, Marion Lewis Picklesimer Aug 1954

Calorimetric Measurements On High Purity Iron And Eutectoid Steels, Marion Lewis Picklesimer

Doctoral Dissertations

Plan of the Investigation: The data needed to determine the thermodynamics of the transformation of a steel are: (1) the specific heat of austenite from above the critical temperature to the transformation temperature, (2) the specific heat of the transformed product from the reaction temperature to room temperature, (3) the enthalpy change at the transformation temperature, and (4) the variation of these with temperature of reaction.

Since the calorimeter could not be used to determine these data directly, that is, during the transformation of austenite to pearlite at temperatures well below the critical temperature, the problem was approached from the ...


Proposed Revision For Specification For Reflex-Reflective Materials For Highway Signs, James H. Havens Aug 1954

Proposed Revision For Specification For Reflex-Reflective Materials For Highway Signs, James H. Havens

Kentucky Transportation Center Research Report

There are several pertinent factors and considerations that have a direct bearing on the requirements contained in the attached Recommended Special Specification No. 50-R, and it seems appropriate to record them here as reference material either in support of the specification or as information.


Flexural Properties Of Corrugated Metal Roofing, Howard L. Wakeland Aug 1954

Flexural Properties Of Corrugated Metal Roofing, Howard L. Wakeland

Center for Cold-Formed Steel Structures Library

Introduction Roofing materials that combine shelter, fire safety, durability, and strength have largely replaced such historic types of roofing covering as straw, leaves, tile, bark and various wooden coverings. Thus, we have such modern roof coverings as asphalt composition, cement-asbestos, and metal. Of these, metal roofing is used more than any other on farm service buildings. Approximately 40 per cent of present day farm service buildings in the United States are roofed with metal. This proportion continues to increase as more and more metal roofing materials are made available for rural construction. The wide use of metal roofing is due ...


Us Army Transportation Intelligence Agency, Robert Bolin , Depositor Jul 1954

Us Army Transportation Intelligence Agency, Robert Bolin , Depositor

DOD Military Intelligence

Historical Data Cards were used to record the organizational history of units within the Army. This card was provided to Robert Bolin by the US Army Institute of Heraldry in 1985.

TIA was a special-purpose military unit established to perform the intelligence functions of the Transportation Corps. TIA produced intelligence on foreign military transportation equipment and ground transportation facilities of strategic interest to the US armed forces.

TIA was discontinued in 1962 when most of the Army technical services were reorganized out of existence. Its functions, personnel, records, and equipment were divided among the newly created US Army Foreign Scientific ...


Henrys Fork Project Wyoming-Utah, Bureau Of Reclamation; Department Of Interior Jul 1954

Henrys Fork Project Wyoming-Utah, Bureau Of Reclamation; Department Of Interior

Elusive Documents

The accompanying report on the potential Henrys Fork project presents in reconnaissance scope the possibilities for further water resource development in the Henrys Fork and Sheep Creek Basins in northeastern Utah and southwestern Wyoming. The report is based on findings of recent investigations conducted during the past year although much of the available basic data used in the studies was obtained in previous intermittent investigations made during the past 50 years.


Application Of Liquid-Liquid Extraction To The Separation Of Tantalum From Niobium, Raymond A. Foos, H. A. Wilhelm Jul 1954

Application Of Liquid-Liquid Extraction To The Separation Of Tantalum From Niobium, Raymond A. Foos, H. A. Wilhelm

Ames Laboratory ISC Technical Reports

The use of liquid-liquid extraction for the separation of tantalum from niobium was demonstrated. Tantalum and niobium spectrographically free of each other were prepared in quantity on a continuous basis.


Application Of Liquid-Liquid Extraction For The Separation Of Zirconium From Hafnium, R. A. Foos, H. A. Wilhelm Jul 1954

Application Of Liquid-Liquid Extraction For The Separation Of Zirconium From Hafnium, R. A. Foos, H. A. Wilhelm

Ames Laboratory ISC Technical Reports

The use of liquid-liquid extraction for the separation of zirconium from hafnium was demonstrated. Hafnium spectrographically free of zirconium was prepared in quantity on a continuous basis. High purity fractions of zirconium were also prepared.


Separations Of Yttrium And Some Rare Earths By Liquid-Liquid Extraction, Raymond A. Foos, H. A. Wilhelm Jul 1954

Separations Of Yttrium And Some Rare Earths By Liquid-Liquid Extraction, Raymond A. Foos, H. A. Wilhelm

Ames Laboratory ISC Technical Reports

The use of liquid-liquid extraction for the separation of some inorganic compounds was demonstrated.


Investigation Of Inclusions In Armco Ingot Iron, Edwin J. Duncan Jun 1954

Investigation Of Inclusions In Armco Ingot Iron, Edwin J. Duncan

Bachelors Theses and Reports, 1928 - 1970

Various chemical and electrolytic separation methods were investigated in an attempt to separate the in­clusions in Armco ingot iron. Residues obtained were X-rayed for identification purposes. The microstruc­tures of this iron were studied with the object of de­termining the relative sizes, locations, and possible compositions of the inclusions.


Effect Of Recovery On The Recrystallized Grain-Size Of High Purity Aluminum, Rodney L. Helterline Jun 1954

Effect Of Recovery On The Recrystallized Grain-Size Of High Purity Aluminum, Rodney L. Helterline

Bachelors Theses and Reports, 1928 - 1970

When a cold-worked metal is annealed, it’s physical properties hange as a result of a new grain structure. The annealing treatment is divided into three stages according to the changes that occur in the distorted metal: (1) recovery, (2) recrystallization, and (3) grain growth.