Engineering Commons^™

The Effect Of Strontium Sulfate Addition On The Lead Content Of Electrolytic Zinc, Arthur E. Morris

Bachelors Theses and Reports, 1928 - 1970

The production of electrolytic zinc involves the passage of an electric current through an aqueous solution of zinc sulfate and sulfuric acid. While all plants use procedures fundamentally the same, there are principal differences in the acidity of electrolyte, the zinc content of the electrolyte and the current density used.

Streaming Potential Studies, Andrew L. Mular

Bachelors Theses and Reports, 1928 - 1970

The application of streaming potential to mineral-dressing is comparatively recent. Although colloidal chemists, for some time, have been familiar with streaming potential and the electrical double layer, A.M. Gaudin, Richards Professor of mineral-dressing, M.I.T, and D.W. Fuerstenau, his assistant, were the first to publish a series of experiments dealing directly with streaming potential applied to flotation. The apparatus described in this thesis was used by Fuerstenau and was developed by him especially for this type of investigation.

Test 575: Mccormick Farmall Cub, Nebraska Tractor Test Lab

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 …

Shaft Mucker Design, P. J.G Du Toit

Bachelors Theses and Reports, 1928 - 1970

The mucking principle employed in the design of this mucking machine is that of a continuous operation instead of an intermittent one. The mucker was primarily designed for operation in shafts (vertical or inclined) and winzes but the mucker is not restricted to these.

Shaft-Sinking Investigation, Johan De Beer

Bachelors Theses and Reports, 1928 - 1970

During the past few years there has been a tremendous advance in the rate of sinking shafts. The sinking of shafts has always been one of the more costly and time consuming operations in the development of a mine. Shaft sinking is a long-term operation and only in the past few years has there been a remarkable increase in the rate of sinking.

Prospect Drilling, George Allen Mealey

Bachelors Theses and Reports, 1928 - 1970

This report covers four types of prospect drilling: churn drilling, diamond drilling, percussion drilling and calyx drilling. No other types of prospect drilling are discussed except these four types because any other method are not extensively used.

Underground Concreting, J. D. Riggleman

Bachelors Theses and Reports, 1928 - 1970

Concreting has in the past few years become a prime consideration in underground support; therefore, this report will endeavor to outline some of the basic fundamentals of underground concreting. Greater emphasis has been placed upon the characteristics and criteria of good concrete and placing procedures and techniques. Actual examples of practice have been cited but only to illustrate the basic fundamentals which are outlined in the major part of this report.

Modern Hydraulic Filling In Underground Metal Mines, Rainer Gevers

Bachelors Theses and Reports, 1928 - 1970

While the practice of back-filling is almost as old as mining, it was only when modern machines made possible the removal of vast tonnages of rock, that the support of underground workings-- by filling work-out stopes-- became peremptory from both the humane and economic aspects.

Test 572: International Model W-400 Lpg, Nebraska Tractor Test Lab

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 573: Mccormick Farmall Model 300 Lpg, Nebraska Tractor Test Lab

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 571: Mccormick Farmall Model 400 (Diesel), Nebraska Tractor Test Lab

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 …

The Development Of Miniature Pumps, Carl A. Miller

Journal of the Minnesota Academy of Science

No abstract provided.

Synthetic Manganese Dioxide Production, Russell Marion Dugdale

Bachelors Theses and Reports, 1928 - 1970

Before World War I the United States procured all of its battery grade manganese dioxide from the Caucasus. Even at this time some experimentation was under way to produce this depolarizing substance synthetically and the experiments were successful to a large extent so that when the ore from the Caucasus was cut off, the necessary material was produced synthetically. The shortage was relieved when a deposit of manganese dioxide was discovered in Montana, which was superior to the ore from the Caucasus.

Production Of Iron, Chromium And Nickel By Amalgam Metallurgy, Richard Earl Westerman

Bachelors Theses and Reports, 1928 - 1970

Certain properties of mercury, such as its affinity for other metals, its high hydrogen overpotential, and its unique liquid state, have made its use desirable for many applications in the fields of physical and process metallurgy. Though considerable research has been done on mercury amalgams, only comparatively recently has it been shown that mercury amalgams follow certain definite laws with regard to phase exchange phenomena and electrochemical properties. It is now possible to predict, with considerable accuracy, the results of amalgam reactions.

The Zone-Refining Of A Lead-Bismuth Alloy, Edward James Westerman

Bachelors Theses and Reports, 1928 - 1970

Zone-refining, the purification of a metallic ingot resulting from the passing over its length of a comparatively short molten zone, has been found useful in the purification of several metallic elements. The impurities present in an elemental metal are often more soluble in the molten zone than in the solid material, and are carried to one end of the bar in the molten zone. This molten-zone movement can be repeated any number of times on a metallic ingot, with the zone always being moved in the same direction.

Streamflow Forecast Of Bear River At Harer, Idaho, J. M. Crook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Accurate forecasts of stream flow produce direct benefits for the populace of a watershed which can be measured in terms of cash income. In 1946 in Deschutes and Crook counties of Oregon, the stream flow forecast based on snow surveys indicated appreciably greater than average runoff to be anticipated during the course of the subsequent irrigation season (10). Accordingly, some 6500 acres of agricultural land in the area, normally not cropped, were seeded and successfully irrigated. The cash value of crops, grown on this usually unproductive land, was estimated to be more than half a million dollars.

Conversely, when short …

Mine Cars Of The United States, Edward Sadar

Bachelors Theses and Reports, 1928 - 1970

Underground transportation of mineral, waste and supplies is a vital function in mine operation. For this reason the selection and design of a mine car is important. Each type of mine car is constructed for a certain type of job. The design of a mine car is the result or product of the many people connected with its construction. It is the purpose of this report to bring forth many of these ideas by way of discussions, statistical classifications and drawings of the mine car.

The Application Of Kentucky Flexible Pavement Design Method To Washo Test Road Conditions, William B. Drake

Kentucky Transportation Center Research Report

In the summer of 1952 the Flexible Pavement Design Committee of the Highway Research Board began the sponsoring of a comparative design project. Several state highway departments and other organizations were invited to submit flexible pavement designs, based upon their own current practices, for the subgrade, materials, and traffic conditions of the Western Association of State Highway Officials (WASHO) test road. This road was being constructed in Malad, Idaho, through the participation of 13 western states and the Bureau of Public Roads. The Kentucky Department of Highways was one of the organizations invited to participate in the comparative design project.

A Hydraulic Analysis Of The Channel Relocation Of Stephens Creek, Eugene M. West

Kentucky Transportation Center Research Report

Recently Mr. J.O. Cornell requested the assistance of the Drainage Section of the Research Laboratory in investigating the channel that the U.S. Corps of Engineers has designed in conjunction with the raising of Dam No. 39 and the changing of the locking system. The principal reason for this investigation was to determine the effect, if any, that this project will have upon the five-span highway bridge on U.S. 42, located approximately two thousand feet upstream from the confluence of Stephens Creek and the Ohio River and at the upstream end of the new channel.

Kentucky Soils: Their Origin, Distribution And Engineering Properties, Robert C. Deen

Kentucky Transportation Center Research Report

Soil is the product of the action of climate and living organisms upon parent materials, as conditioned by local relief. The length of time over which these forces are operative is of great importance in determining the properties of the final soil product. Altogether, there are five principal factors in soil formation: 1.) climate, 2.) biological activity, 3.) nature of the parent material, 4.) topography, and 5.) time.

The major differences in the soils of Kentucky result chiefly from differences in 1.) the rocks from which the parent materials were derived and 2.) the topographic position of the materials.

Model Study Of Flow Through Culverts, Eugene M. West

Kentucky Transportation Center Research Report

Within the past four years, the Highway Materials Research Laboratory has expended considerable effort upon investigating and developing new approaches to the problem of estimating the quantity of runoff from small drainage areas. Particular interest has been given to areas of sizes that require culverts or small bridges with less than twenty feet of span. The results of these studies have been included in the Drainage Manual recently adapted for use by the Department of Highways.

A Study Of The Properties And Performance Of Kentucky (Natural Sandstone) Rock Asphalt, James H. Havens, Ellis G. Williams

Kentucky Transportation Center Research Report

Kentucky (natural sandstone) rock asphalt derives its esteem as a highway surfacing material from its uniform appearance on the road, its riding characteristics, and the fact that it affords the highest protection against skidding (slipperiness) of any of the paving materials now generally available (see Appendix IV). The usual methods of handling, steaming, laying and spreading offer some of the conveniences and advantages of a ready-to-use material. Although its service history during the past 50 years has been generally favorable, there has also been a certain amount of risk involved in its use, particularly in recent years on roads sustaining …

The Variations Of Stress Induced In An Eccentrically Located Bolt Securing A Flanged Joint, Verne E. Blake Jr.

Mechanical Engineering ETDs

It is common practice in design work to use bolts as a means of attaching load carrying members. In many instances it is not possible to locate the bolt so the line of action of the external load will pass through the bolt axis. As a result, there are secondary loads, resulting from the eccentricity of the load paths, which the bolt must resist in addition to the primary loads.

Determination Of The Residual Vswr [Voltage Standing Wave Ratio] Of A Slotted Line., Michael C. Robel

Electrical and Computer Engineering ETDs

Idealistically, a slotted line should be designed so that, when it is terminated in its characteristic impedance, the VSWR as determined by a movable probe in the slotted line will be 1.0. However, in practice this is not possible, particularly in the case of coaxial slotted lines where matching elements, adapters and connectors are utilized. The devices mentioned above have physical discontinuities which give rise to reflections, which cause a standing wave to be produced even though the line is terminated I its characteristic impedance.

High Stability Lc Oscillator For Use With A Capacitive Pressure Sensing Element, Arthur J. Eldridge

Electrical and Computer Engineering ETDs

In the course of work at the Sandia Corporation, a definite need arose for the measurement of barometric pressures to an accuracy beyond that attainable with commercially available equipment. The standard instrument for measuring these pressures is the mercurial barometer. While a visual method of reading the instrument produced good results to within a 0.1 millimeter of mercury, it was dependent upon the operator using as a reference a target of sighting on the top of the meniscus formed in the barometer tube by the mercury.

Corona Threshold Of Single And Multiple Conductor Lines, David S. Carrick

Electrical and Computer Engineering ETDs

Corona is a self sustaining, often luminous discharge due to ionization adjacent to charged conductors, characterized by the electrodes having a small radius of curvature compared with the interelectrode gap. The display on a power transmission line is accompanied by a current between the conductors which to an engineer mean a power loss that should be minimized if unavoidable.

Light Gage Cold-Formed Steel Design Manual, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

The Effect Of Today's Residential Electric Consumer On The Planning, Design, And Operation Of Electrical Distribution Systems, James Wilbur Stephens

Professional Degree Theses

"The purpose of this paper shall be primarily to show the present day trends in the use of electricity by the residential consumer and the effect of such trends on the design, planning, and operation of the electric distribution system. System planning related to the electric utility is divided into two classes. The first deals with generation. The second deals with distribution from the various load and transmission centers to the customer. This thesis will deal .primarily with studies related to the latter.

Many utility distribution system problems have been brought about by the rapidly increased demands for residential uses …

Calcination Of Missouri Flint, Burley And Diaspore Clays In A Rotary Kiln, Richard Addison Parker

Professional Degree Theses

"This thesis will concern itself primarily with the preparation, handling and calcination of Missouri fire clays that are subsequently used as "grog" for manufacture of fire brick. This "grog", i.e., calcined flint, burley or diaspore clay is then mixed with ether clays having plastic qualities to form desired shapes of high temperature refractories, and burned as a final product in tunnel kilns and as required, in “beehive” or periodic kilns. The actual manufacture of fire brick will not be dealt with since it is, in itself, a highly specialized industry. We are immediately concerned with the proper preparation of calcined …

Field Manual Fm 55-8, Transportation Intelligence, October 1956, Robert Bolin , Depositor

Department of Defense Military Intelligence

This is a manual describing the transportation intelligence activities of the Army in the mid-1950s. A more accurate title would be “Transportation Corps Intelligence” since the Army technical services were responsible for intelligence related to their field of expertise in the 1950s.

The modern US Army vision of the technical intelligence developed during World War II. Shortly before World War II, Army Technical Services had been instructed to set up intelligence sections in the offices of their chiefs. The technical services were bureaus which supplied weapons, equipment, and services to the Army, managed the careers of officers in a particular …