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An Experimental Investigation Of The Te01 Electromagnetic Fields In Ridge Waveguide, George A. Arnot Jr

Electrical and Computer Engineering ETDs

The aim of this thesis is to arrive at the field distribution of the ridge waveguide for the TE₀₁ mode, either mathematically or experimentally, the latter proving to be the case. Under the heading of Theoretical Considerations the difficulties involved in obtaining a mathematical solution to the problem are presented. The experimental results then follow and in the Conclusions a comparison is made of the results obtained by other writers and the author's data.

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.

Series Capacitors, Emcet Bilgeer

Masters Theses

"Static capacitors as an element of transmission and distribution circuits first appeared in the form of shunt capacitors. These shunt capacitors were primarily used in power factor correction. They can be regarded as a load in the circuit which draws a loading current. This loading current fleeing through the reactive line produces a voltage rise, thus reducing the voltage drop between sending and receiving ends. This phenomenon helps the voltage control of the feeder as well as power factor correction. The disadvantage of the shunt capacitor is its inflexibility. The shunt capacitor is connected across the line; hence the voltage …

Economic Analysis Of Secondary Distribution Networks, Charles F. Cromer

Masters Theses

"In the early history of commercial electricity in heavy load density areas, the d.c. Edison Network was developed extensively. As far as reliability is concerned it is exceeded by no system. At the present time it has been developed to the extent of automatic and non-automatic converters, motor-generator sets, booster sets and storage battery reserve capacity.

This type of network is fed from several substations in the area at utilization voltage.

As load densities have increased, the large amounts of copper required, the cost of substation sites and large rotating conversion equipment have made the expansion of the d.c. Network …

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, …

An Experimental Investigation Of Multivibrators, Harry W. Gates

Electrical and Computer Engineering ETDs

The object of this study is two-fold. The first part of the investigation is concerned with substantiating experimentally the mathematical analysis for the conventional multi-vibrator and to derive similar expressions for the grid return multi-vibrator. The second purpose of this investigation is to delve into several possible ways of improving the linearity and thereby the frequency division usefulness of the multi-vibrator.

Calculations Of Maximum Sag Of A Transmission Line With An Ice Load On One Span, Rodney A. Schaefer

Masters Theses

"An important problem concerning electric power lines is the calculation of the maximum sag occurring when there is an ice load on only one span. The object of this thesis is to determine a practical method for calculating the maximum sag of a transmission line, suspended on suspension insulators, with the aforementioned loading conditions. This paper is limited to the case where the supports of the transmission line are at equal elevations and all span lengths are equal"--Introduction, page 1.

A Study Of Cathode Drift Compensation In D-C Amplifiers, Joseph W. Rittenhouse

Masters Theses

"The expression, cathode drift, has to do with the random variations in vacuum tube plate current which are attributable to similar variations in emission velocities of electrons leaving hot cathodes. The fact that these random current changes appear to result from spurious drifts in cathode potential, since all other electrode potentials are unrelated to them, give rise to the expression, cathode drift...The problem with which this paper is concerned is a study of some of the possibilities of compensating for cathode drift effects in a single amplifier stage. Specifically, this paper will: (A) present a detailed mathematical and graphical analysis …

Analysis Of Cascade Of Four-Terminal Networks, Ernest Randolph Roehl

Masters Theses

"The object of this thesis is to find analytic expressions for the voltage and current variations along a structure composed of a cascade of identical dissymmetrical four-terminal networks driven harmonically at the sending end and working into an impedance at the receiving end and an impedance that can be placed at any of the junctions along the cascade. The method of analysis that is applied is analogous to that used in solving the long-line problem. A transmission system usually consists of the line or cable itself plus numerous other links whose purpose it is to correct defects in the line …

Analysis Of Simultaneous Faults By The Method Of Symmetrical Components, Robert Marshall Montgomery

Masters Theses

"The object of this thesis is to present a method for the analytic determination of fault currents and voltages of a symmetrical three-phase system that is subjected to three simultaneous faults. The fault analysis is to be effected by the method of symmetrical components...Though relatively infrequent, simultaneous faults are important because relay systems, operating satisfactorily for single faults, may fail to isolate simultaneous faults. Therefore, it seems worthwhile to have in convenient form a method for calculating short-circuit currents and voltages caused by faults occurring at the same time at three separate and distinct points of a system. It is …

Design Of A Radio Broadcasting Station, John William Hamman

Masters Theses

"In the design of any piece of equipment, before any work whatsoever is done, a reason for developing the object must be apparent to all concerned. Any expenditure of time, labor and money must be properly justified before action can be taken. In the case of this paper, then, the reason for designing a broadcast radio station for the Missouri School of Mines & Metallurgy at Rolla, Missouri is twofold: First, to provide an additional instrument whereby instruction may be given to students interested in the study of radio; second, to supply the residents of Rolla and vicinity with entertainment …

Study Of The Method Of Geometric Mean Distances Used In Inductance Calculations, Harold Lockwood Seneff

Masters Theses

"The object of this thesis is to study the method of geometric mean distances as applied in the calculation of inductances of transmission line conductors and of multicircuit transmission lines. The thesis will consist of: (a) the derivation of some of the basic theorems and equations to be used, (b) the use of these theorems and equations in calculating the geometric mean distances of different transmission line conductors, and (c) practical application of geometric mean distances applied in the calculation of equivalent inductance of multicircuit transmission lines. The method of geometric mean distances as applied to individual conductors of single …

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.

Equations For The Ballistic Galvanometer, Robert H. O'Brien

Bachelors’ Theses

This thesis presents the development of the equations for the ballistic galvanometer. The subject was chosen because of its fascinating interest and because of the breadth of material included. The working out of the general equation required a comprehensive review of fundamentals in electricity and mechanics, swell as mathematics. The following features may be noted.

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 …

Design Of An Alternating Current Squirrel-Cage Induction Motor, Thomas Moffett Thompson

Bachelors Theses

"This thesis deals with the selection and specification of an induction motor"--leaf ii.

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 …

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.