Digital Commons Network^™

A Technique For Obtaining Submicrosecond Exposure Times At Large Aperture In High-Speed Photography, Joseph A. Hull

Electrical and Computer Engineering ETDs

The purpose of the investigation described in this report was to attempt to improve one of the existing techniques, namely, the Kerr cell type electrooptical shutter, to make it more applicable to the study of high-explosive physics. To provide a background for the reader, a brief discussion of the other techniques will be described. Some of the advantages and limitations of these systems will be discussed.

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.

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 …

Investigation Of The Current Distribution On An Antenna In A Waveguide, David J. Freeman

Masters Theses

"In a communication system composed of several networks and transmission systems, it is necessary for all parts of the system to be impedance matched so that medium energy transfer is possible.

One of the recent transmission systems which has been developed is the wave guide. With the advent of the wave guide the communication engineer is immediately faced with the problem of coupling existing systems and networks to his newly found mode of transmission.

Practically this coupling problem reduces to one of feeding radio frequency energy to the wave guide with some conventional transmission line such as a coaxial line. …

A Variational Approach To The Calculation Of Electron Trajectories, Edmund G. Franzak

Electrical and Computer Engineering ETDs

It is the object of the present work to derive, develop, and illustrate a method for the calculation of electron trajectories based on variational techniques and employing scalar and vector potential functions instead of the customary intensity functions. The methods of the calculus of variations furnish an extremely basic approach to the problem while lending an undeniable air of rigor and mathematical elegance.

Solution of the problem will be accomplished by first setting forth a mathematical structure upon which the work will be based, next outlining the physical principles governing the problem and finally applying the mathematical theory and physical …

Mechanical Vibration Of Vacuum Tubes, Jerry Dale Swearingen

Masters Theses

"Since the beginning of the art of vacuum tube building, vacuum tube engineers have been faced with many mechanical problems as well as electrical problems.

Early mechanical problems were comparatively small because most of the tubes were used in stationary apparatus where little or no vibration was envolved.

As time went on, vacuum tubes were placed in portable equipment and this useage established the need for a tube that was mechanically strong enough to give reliable electrical behavior where the tube was subjected to considerable vibration….

Recently it has been shown that vacuum tubes operating in the instrument cabins of …

The Design And Construction Of An Electronic D-C Analog Computer, Frederick R. Wagner, William A. Paar

Masters Theses

"To make this project realizable with the funds available and in the time allowed, and to set forth some definite goals, the following objectives were adopted:

1. Design, construct, and place in working order a d-c electronic analog computer capable of solving 4th order linear differential equations with constant coefficients.
2. Include in the design provisions for real time computation, and also fast, repetitive operation.
3. Provide for later expansion of the computer installation.
4. Limit expenditures to $700"--Introduction, page 4.

Organization And Execution Of A Major Industrial Electrification Project, Robert F. Mccaw

Professional Degree Theses

"All emergencies, especially those created by war, have marshalled the industrial might of nations, among other things. World War II was no exception; in fact, it produced the greatest expansion of industrial facilities in history.

Most all plants in the country underwent some degree of expansion. In certain industries, the experienced workers of existing plants were employed as nuclei for the organization of the gigantic new plants required to produce the arms and equipment necessary to the conduct of a global war.

This thesis pertains to one phase of the design and construction of such an enterprise. This particular phase …

An Experimental Study Of The Effect Upon The Current Distribution And Radiation Pattern Of Crossbars On Yagi Receiving Antennas, Gerald F. Sinnamon

Masters Theses

"The development and widespread use of radar systems in World War 11, and the post-war television boom, has brought about a large amount of investigation in antenna arrays. One of the types of antennas commonly used on radar systems during the early part of the war, and one which finds wide usage today as a television receiving antenna, is the well known Yagi antenna...

Since television antennas are usually mounted out of doors, the antenna must be made mechanically strong to prevent whipping or twisting due to wind, and to prevent sagging due to icing or to its own weight. …

Clipper Amplitude Modulator, Durmuş Öcal

Masters Theses

"An amplitude modulated wave is defined as a wave form in which the amplitude of a sinusoidal signal (carrier) is varied in accordance with a modulating signal whose frequency is much lower than the frequency of the carrier signal. Numerous devices have been found for generating an amplitude modulated wave. In some modulators the amplitude of the carrier is actually varied in accordance with the modulating signal. In other types of modulators the carrier and the modulating signal are simultaneously applied to a nonlinear element or circuit. The output of this non-linear element is a distorted wave containing many frequencies. …

Design Of A Galvanometer To Be Placed Within A Tubular Antenna For The Purpose Of Measuring Antenna Current Distribution, Ferdinand Henry Mullersman

Masters Theses

"The object of this paper is to design such a galvanometer for application to cylindrical UHF antennas and to discuss the procedure involving its use. The galvanometer will then be placed inside a completely isolated parasitic antenna and the distribution of current along the antenna will be measured"--Introduction, page 5.

Investigation Of Vacuum Tubes As Four Terminal Networks, Vasil Uzunoglu

Masters Theses

"This thesis was undertaken with the aim of consolidating the most important work that has been done in the field of equivalent vacuum tube circuits which has been found to be highly disassociated.

The author of this thesis feels that this thesis is the most complete consolidation of information on equivalent vacuum tube circuits"--Introduction, page 3.

Analysis Of Conductor Vibration, Robert H. Nau

Electrical and Computer Engineering Faculty Research & Creative Works

Considerable attention has been given to conductor vibration of suspended transmission lines during the past 25 years. Even so, the engineers of the public utilities feel that they have only started to get a solution to the vibration problems. Extensive research programs are being conducted at the present time by manufacturers of conductor cable and ground wires and by numerous public utilities themselves.

Aeolian vibrations are the chief concern because they occur whenever a steady wind, of from one mile per hour to hurricane velocity, blows across the suspended line. Thus, millions of flexures, however small or large in amplitude, …

A Study Of Radio Frequency Converters And Mixers, James J. Skiles

Masters Theses

"This thesis will present a detailed discussion of the principles of frequency conversion and the problems attendant to the design of converter stages. The topic of harmonic conversion has been singled out for a more extended treatment than is now available in the literature. This topic is the subject of the experimental investigation portion of this thesis. Harmonic conversion has applications in U-H-F receivers as well as in "Double Superheterodyne Receivers".

The discussion given to the frequency converter in the first section of this thesis will be without regard to any applications. General theory will be stressed, and most of …

The Theory Of The Impulse Function For Oscillatory Mechanical And Electrical Systems, E. L. Hill

Journal of the Minnesota Academy of Science

No abstract provided.

History Of The Thermionic Tube, Mary Liguoria Urbin

Bachelors’ Theses

My interest in the field of physics being that of electricity, I have been permitted to pursue this thesis in the field of thermionics.

The thermionic tube is one of vital importance not only in the field of radiotelegraphy and radiotelephony, but is of great value in the field of engineering and a vast asset in university and college laboratories. In fact, its advent has opened up a new era in many fields. H. J. Van Bijl terms is a "versatile talking bottle." In a paper of this nature only the important features can be stressed, and even here much …

A Study Of The Plating Prohibitive Properties Of Various Separators, Bruno J. Pozorski

Bachelors’ Theses

The problem of this thesis is to study the plating prohibitive properties of the various materials commonly used in the manufacturing of separators, and to indicate which material would be most serviceable and feasible in a separator. At one time positives and negatives were kept not more than 0.25 inches apart, with the idea of reducing the intervening layers of electrolyte, and, therefore, the internal resistance of the cell, as much as possible. It was, however, found that the output could actually be increased by putting the plates at greater distances, the fact being that the larger bulk of solution …

Electrodeposition Of Rubber Upon An Electrode By Means Of A Direct Current Of Electricity, L. F. Novotny

Bachelors’ Theses

The rubber industry may be said to be one of the most speedily developed industries in the world. This is due to a great extent to the fact that the first real interest in rubber as a material of commerce came in the advent of the automobile. It was in 1888 that an Irish horse doctor, John Boyd Dunlop, conceived the idea of tying a rubber tube around the wheels of his little son's velocipede. Within seven years of this event, a $25,000,000 corporation was manufacturing Dunlop tires.

Something may also be said here of the man who took the …

Selection And Arrangement Of Proposed Storage Battery Equipment For Physics And Electrical Engineering Laboratories, Otho Melvin Wilson

Bachelors Theses

"The object of this Thesis is to select and arrange the equipment for a 110 volt storage battery system to be used in supplying a variation of voltage to the Electrical Machinery, Electrical Measurement, and Physics Laboratories, located in the basement of Norwood Hall"--page 4.

Transmission Of Electrical Energy At 220,000 Volts, Robert Wilhelm Ahlquist

Bachelors Theses

"A. E. Silver at the Annual Convention of the A.I.E.E. in 1919 gives some of the reasons why 220,000 Volt transmission is a logical and feasible commercial proposition. He also gives some of the main features of the undertaking...Owing to the great scope of this paper it has been thought necessary to generalize on the discussion of the first two topics and to treat the next two in more detail"--Statement of Scope of this Paper, pages 3-4.

The Outdoor Substation, Israel Herrick Lovett

Professional Degree Theses

"The Outdoor Substation, as an essential part of a high voltage distribution system, has been largely developed during the past 12 years. The New England Power Company was one of the pioneers in this development, their substation at Millbury, Massachusetts, being one of the first outdoor substations in the northern part of the country. During the five years' experience with this company, the writer of this thesis, in his position of Chief Electrical Designer, was partly responsible for the design of all substations constructed by the company during this period, from 1916 to 1921...This thesis is an account of the …

A Discussion Of Electric Welding, Peter Fergus Thompson

Bachelors Theses

"This thesis deals with the different processes, methods and uses of Electric Arc Welding; and tests made in the laboratory with Direct and Alternating Current"--page iii.

An Experimental Study Of The Cathode Fall In Helium And Argon With Wire Cathodes, L. G. Raub

University Studies (University of Nebraska) (1888–1984)

It was recognized rather early in the study of the phenomena of discharge of electricity through gases that the ordinary laws of conduction as found in solid and liquid conductors are not applicable to gases. It was shown by Zeleny and independently by Child that Ohm's law by no means represents the distribution of potential between electrodes in an ionized gas, but that the potential gradient is large in the vicinity of the electrodes, and not uniform throughout the space between them. When the pressure of the gas surrounding the electrodes is reduced to one or two millimeters and a …

A Thesis Presented To The President And The Faculty Of Marquette University For The Degree Of Bachelor Of Science In Civil Engineering And Bachelor Of Science In Electrical Engineering, Anthony B. Czachurski, Benjamin D. Ratke, Joseph G. Casey, William H. Stephan

Bachelors’ Theses

In the work covered by this thesis it is desired to examine an undeveloped water power for the purpose of producing electrical energy as a commercial comodity. Experience has taught that it is best to ascertain first where the product will find its market, and to follow up a satisfactory showing at that end by determining the power capacity of the source, the feasibility of harnessing the same, and the cost of accomplishing this. This program would be adopted in any commercial enterprise to insure a reliable conclusion, and will be followed as closely as possible in the work covered …

Energy Loss In Commercial Condensers, Walter Roland Allen

Electrical and Computer Engineering ETDs

The investigation of the energy loss in condensers is one which electricians and experimenters have long carried on. Their efforts have been restricted chiefly to alternating currents. Many methods have been proposed and used with varying success. The losses in condensers are due to dielectric hysteresis and leakage. That the dielectric of a condenser becomes heated when an alternating current is applied to terminals has long been known. A condenser which has been charged does not lose its entire charge when it is discharged, part of it remaining as a residual charge. Kleiner used the thermo-couple embedded in the dielectric …

Comparative Observations On The Evolution Of Gas From The Cathode In Helium And Argon, Clarence A. Skinner

University Studies (University of Nebraska) (1888–1984)

No abstract provided.

Electrolysis Mitigation Of The Underground Telephone Cable Plant Of The City Of Green Bay, Wisconsin, William J. O'Connor

Bachelors’ Theses

Prior to the fall of 1915, the Wisconsin public Service Company of Green Bay operated an electric street railway with an uninsulated negative rail return in the city of Green Bay, the track network with its relation to the underground cable sheaths of the Wisconsin Telephone Company as shown on the General Condition Map.