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Electrical Engineers, Proceedings of the Institution of

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• Flux linkage between two solenoidal tape windings as a factor in the reading of cylindrical thin-film logical elements

Publication Year: 1963, Page(s):631 - 640
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Cylindrical ferromagnetic films can be used as logical elements, and when axially aligned they are energized, and the remanence is sensed, by cylindrical current sheets. The read 1Â¿ to 0Â¿ ratio is influenced by the mutual inductance between the sheets. The mutual inductance between two solenoidal tape windings has been measured, the windings being formed around a copper rod because the films a... View full abstract»

• Non-linear diffusion of minority carriers

Publication Year: 1963, Page(s):641 - 646
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A study of the non-linear diffusion of minority carriers has been carried out. Once the starting terms have been defined, i.e. the diffusion constant depends on carrier concentration according to Webster's formula Dp=Dp0(1+P/P+Nd) an exact first integral is found, from which a study of the influence of bulk recombination on the current gain of a transistor is made. An expression for the base contr... View full abstract»

• High-frequency silicon-controlled-rectifier sinusoidal inverter

Publication Year: 1963, Page(s):647 - 652
Cited by:  Papers (2)
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In inverter circuits employing switching elements such as silicon controlled rectifiers (s.c.r.) the recovery time of the device normally limits the maximum operating frequency of the circuit. The recovery time allowed by the circuit is invariably limited to some fraction (usually about one-fifth) of one half-cycle. Circuits employing s.c.r.s with 20 Â¿s recovery time cannot therefore be used in i... View full abstract»

• Determination of the electrical characteristics of Hall plates

Publication Year: 1963, Page(s):653 - 659
Cited by:  Papers (2)
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The theoretical determination of the electrical behaviour of the Hall plate has hitherto involved difficult computations based on the mathematical technique of conformal transformation. The paper outlines an alternative method of theoretically deriving such electrical characteristics, based on the numerical solution of the finite-difference form of Laplace's equation using a digital computer. The ... View full abstract»

• Absolute calibration of a class of torque-operated microwave wattmeters incorporating resistive elements

Publication Year: 1963, Page(s):660 - 664
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A general method of calibration suitable for loss-free (or low-loss) torque-operated microwave wattmeters has been developed by the author in a previous paper. The present paper describes an extension of that theory to cover the case of a wattmeter of which a component part is a lossy element in which a fraction of the power to be measured is dissipated. To apply the method, it is necessary that t... View full abstract»

• Gyromagnetic resonance graphical design data

Publication Year: 1963, Page(s):665 - 670
Cited by:  Papers (4)
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A set of graphical solutions of Kittel's equation of gyromagnetic resonance is plotted. The graphs present the d.c. magnetic fields in normalized form as functions of sample shape for commonly used shapes. The curves help in the visualization of the magnetic condition of resonant elements and in the mechanization of the application of Kittel's equation to the design of ferrite microwave components... View full abstract»

• Simulation of rational transfer functions with adjustable coefficients

Publication Year: 1963, Page(s):671 - 679
Cited by:  Papers (1)
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Design techniques are described for the simulation of quadratic factors of rational transfer functions with independent control of each coefficient. Rational-function approximations, for the simulation of dead time, are considered. Other typical examples are described and include the simulation of the Butterworth, ChebyÂ¿shev and orthonormal functions which have application in self-optimizing cont... View full abstract»

• Distribution of information in stop consonants

Publication Year: 1963, Page(s):680 - 689
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A representative sample of stop-consonant sounds was recorded on magnetic tape. These were then cut out and spliced close together; they were played back and their oscillograms recorded with a camera of the continuously motor-driven type. On this film the required parts of the sounds, their gap, burst, transition, etc., can be located. By simple proportion the corresponding regions are marked off ... View full abstract»

• Discussion on "Unstable electron flow in a diode"

Publication Year: 1963, Page(s):689 - 690
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• Relaxation Oscillator circuits using complementary transistors

Publication Year: 1963, Page(s):690 - 692
| PDF (349 KB)
• Sums of probability distributions expressed in decibel steps

Publication Year: 1963, Page(s):692 - 694
| | PDF (317 KB)

First Page of the Article
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• Turbo-type generators. Review of progress

Publication Year: 1963, Page(s):695 - 702
Cited by:  Papers (1)
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First Page of the Article
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• General-purpose turbo-alternator model

Publication Year: 1963, Page(s):703 - 713
Cited by:  Papers (35)
| | PDF (1219 KB)

The present trends in power-system design cause a continual reduction of the stability margins of generators connected to the British Grid system. This is due, primarily, to the changing characteristics of the turbo-generators, and, for this reason, the need has arisen for an accurate generator model for use in stability studies of future systems. The paper describes the development of a mathemati... View full abstract»

• Rectifiers and rectifier applications. A review of progress

Publication Year: 1963, Page(s):714 - 738
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Very great changes have taken place recently in connection with rectifiers and their applications, and this seems to be a suitable moment to survey the state of world developments and the trends. The rectifiers considered here are limited to those of substantial power, for the ordinary industrial and traction applications. They therefore mainly comprise (i) mercury-arc convertors for wide-range gr... View full abstract»

• New transductor-type d.c. transformer particularly applicable to h.v. d.c. systems

Publication Year: 1963, Page(s):739 - 750
Cited by:  Papers (3)
| | PDF (1349 KB)

The paper reviews briefly the transductor-type d.c. transformers which are at present in use, including the type using two sets of cores and 90Â° phase displacement between their auxiliary a.c. supplies. It is shown in the paper that a transductor-type d.c. transformer can be constructed without core duplication, but which nevertheless avoids the production of commutation pulses or notches in its ... View full abstract»

• Effects of tensile stress on the magnetic properties of grain-oriented silicon-iron laminations

Publication Year: 1963, Page(s):751 - 757
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The paper presents the results of an investigation into the effects of tensile stresses on grain-oriented 3 1/4% silicon-iron laminations. Some results are also given for non-oriented 4% silicon iron and for dynamo iron. It is found that tension in the rolling direction of grain-oriented material produces a sharp fall in permeability and an increase of hysteresis loss. However, for a direction at ... View full abstract»

• Testing of mechanical joints in aluminium conductors for insulated cables

Publication Year: 1963, Page(s):758 - 772
Cited by:  Papers (1)
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The increasing use of aluminium conductors in insulated cables has created a need for a standardized testing procedure for the evaluation of joints in the conductors. The paper proposes electrical and mechanical evaluation tests which can be used as a basis for discussion preparatory to the formulation of a test specification. The tests are based on theoretical studies and practical experience rel... View full abstract»

• North-Western Centre: Chairman's address. Some contributions of electrical engineering to machine-tool design

Publication Year: 1963, Page(s):772 - 773
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First Page of the Article
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• West Wales (Swansea) Sub-Centre: Chairman's address. Productivity and the part played by electricity

Publication Year: 1963
| | PDF (180 KB)

First Page of the Article
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• Mathematics as an educational discipline for the engineer

Publication Year: 1963, Page(s):775 - 784
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The utilitarian relationship between mathematics and engineering is explored. The difficulties of mathematical model-building are discussed, and mathematical models are compared with physical models and analogues. The role of the computer (both analogue and digital) is examined. It is suggested that the usual utilitarian view of mathematics, as a tool for use by the engineer, is dangerously mislea... View full abstract»

• Large-scale thermionic power generation from fossil fuels

Publication Year: 1963, Page(s):785 - 792
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A theoretical analysis is made of the use of thermionic diode convertors in electrical power generation from fossil fuels. It is shown that the best way to use such a diode is as a thermodynamic topperÂ¿: heat rejected from the diode stage is used in conjunction with a conventional steam generator. Various possible diode schemes are discussed: a diode having a caesium-on-tungsten cathode operatin... View full abstract»

• The vacuum switch. Part 1: Properties of the vacuum arc

Publication Year: 1963, Page(s):793 - 802
Cited by:  Papers (52)
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In any study of switching devices, an understanding of the current conduction processes in the steady or quasi-steady state must precede the investigation of the transient phenomena during the change from the conducting to the insulating state. The paper describes the results of an investigation into the nature of the arcs which are formed when the contacts of a vacuum switch separate. In many res... View full abstract»

• The vacuum switch. Part 2: Extinction of an a.c. vacuum arc

Publication Year: 1963, Page(s):803 - 811
Cited by:  Papers (22)
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The paper, using as a basis data already described, analyses the process of arc extinction at current zero in vacuum switches. The interruption of direct current is not considered, since it is possible over only a limited range of current. It is shown that there are three sources of neutral atoms and ions in idealÂ¿ vacuum switches, and equations are developed describing the rates of fall of meta... View full abstract»

• Analogue investigation of the stability of a graphite power reactor

Publication Year: 1963, Page(s):812 - 820
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The paper describes the causes and nature of instabilities in a graphite power reactor. The scientific investigation of these instabilities is of importance in the design of control systems of nuclear reactors. In the present approach a model of the reactor is chosen that is simple enough to be simulated on a laboratory analogue but includes the essential features of the problem. That the results ... View full abstract»

• Discussion on 'Choosing transformer ratio-arm bridges'

Publication Year: 1963, Page(s):820 - 822
| PDF (341 KB)

Aims & Scope

The Proceedings of the Institution of Electrical Engineers was published by the IET between 1963 and 1979.

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