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# Electrical Engineers, Proceedings of the Institution of

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Displaying Results 1 - 25 of 34
• ### Inaugural address. Science and engineering

Publication Year: 1965, Page(s):1 - 8
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First Page of the Article
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• ### Chairman's address: Electronics Division. Through communications to electronics

Publication Year: 1965
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First Page of the Article
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• ### Some applications of the scattering matrix

Publication Year: 1965, Page(s):15 - 20
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The scattering matrix is now sufficiently well known to become a useful tool in formalising the discussion of circuit behaviour in terms of wave concepts. Some examples are given to illustrate the utility of the scattering approach in describing the operation of such devices as circulators, hybrid junctions and negative-impedance, amplifiers. The treatment is aimed at the circuit engineer who is c... View full abstract»

• ### Some orbits for communication-satellite systems affording multiple access

Publication Year: 1965, Page(s):21 - 30
Cited by:  Papers (1)
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The paper considers the influence of orbital parameters on the economic provision of simultaneous multiple interconnections between large numbers of earth stations in a global communication-satellite system. In order to provide direct communication between many countries which may be widely separated geographically, and also to avoid certain technical problems, it is most important to provide the ... View full abstract»

• ### Effects of polarisation on a medium-frequency sky-wave service, including the case of multihop paths

Publication Year: 1965, Page(s):31 - 39
Cited by:  Papers (1)
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Ionospheric propagation at medium frequencies depends almost entirely on the ordinary wave, which is, in general, elliptically polarised. This paper describes coupling losses which occur when this wave is transmitted and received with vertical aerials, it also discusses additional losses caused by changes of polarisation when intermediate earth reflections occur. Formulas are given, permitting the... View full abstract»

• ### Magnetic-film logic. A theoretical and experimental study of a system using magnetic films and conducting loops

Publication Year: 1965, Page(s):40 - 48
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The general principles of a proposed logic system using magnetic films are described. Groups of binary storage cells are coupled by means of short planar conducting loops close to the film on a conducting substrate. A theoretical analysis is made of the current induced in the loop when a storage cell on it is read. Currents of 250mA, decaying to 50mA in the first 10ns, are expected. Experiments on... View full abstract»

• ### Method for measurement of plane resistors at microwave frequencies

Publication Year: 1965, Page(s):49 - 54
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The determination of the resistance of plane dissipative layers by impedance measurement is treated. Special attention is devoted to the range 1Â¿104Â¿ per square at 7Gc/s. Formulas are derived from transmission-line theory by making certain approximations, and the ranges of validity of these approximations are discussed. For 10Â¿300Â¿ per square, a simple graphical method is given. Experimental r... View full abstract»

• ### Chairman's address: Power Division. Development in power engineering

Publication Year: 1965, Page(s):55 - 61
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First Page of the Article
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• ### Discussion on "Lightning flashovers on the British grid"

Publication Year: 1965
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• ### New method of presenting cooling data for aircraft electrical machines

Publication Year: 1965, Page(s):63 - 70
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In blast-cooled electrical machines in aircraft, the minimum permissible mass flow of cooling air, the electrical output, the air outlet pressure (a function of aircraft altitude), the air inlet temperature (a function of aircraft speed and altitude) and the pressure drop across the machine are all related to each other. Experimental data concerning these quantities are obtained from rating tests ... View full abstract»

• ### Electrical automatic controls for space heating

Publication Year: 1965, Page(s):71 - 83
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Postwar developments in building have increased the importance of automatic controls for heating and air-conditioning installations because of the demand for comfortable environmental conditions and the large potential saving of fuel obtainable with appropriate controls. The reasons why the actual performance of heating controls is often unsatisfactory are considered. The characteristics of buildi... View full abstract»

• ### Discussion on 'Conductor oscillation on the 275 kV crossing over the Severn and Wye'

Publication Year: 1965, Page(s):84 - 86
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• ### Discussion on current ratings of plastic-insulated cables

Publication Year: 1965, Page(s):86 - 88
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• ### Gas-pressurised lapped-polythene dielectric for extra-high-voltage power-cable systems

Publication Year: 1965
Cited by:  Papers (6)
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The paper describes an experimental investigation of the electrical, physical and mechanical properties of lapped-polythene dielectric. From the levels of impulse-breakdown stress and discharge-inception stress obtained, the use of this dielectric appears to be a promising method of operating low-permittivity low-loss insulation at stresses comparable with those currently employed in paper-insulat... View full abstract»

• ### Impulse-strength measurements on compressed-gas insulation for extra-high-voltage power cables

Publication Year: 1965, Page(s):103 - 108
Cited by:  Papers (15)
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Impulse-flashover measurements on a number of solid insulating materials in compressed-gas atmospheres at pressures up to 500 lbf/in2 are described. From the results of tests made with uniform-field and concentric-cylinder electrode systems, it is concluded that flashover occurs when the breakdown stress of the gas itself is reached at any point. The influence upon gas breakdown of placing thin co... View full abstract»

• ### Some economic aspects of extra-high-voltage underground cables

Publication Year: 1965, Page(s):109 - 118
Cited by:  Papers (5)
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Some of the factors affecting the cost of cable circuits in the main transmission network are discussed. The conclusions are reached that (a) voltage-dependent losses can assume an economic significance one order of magnitude greater than current-dependent losses, (b) optimum conditions have already been reached at a system voltage of 275 kV for existing cable designs and (c) technically improved ... View full abstract»

• ### Discussion on 'High-voltage power-transformer insulation'

Publication Year: 1965, Page(s):119 - 123
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• ### Discussion on "Magnet power supply for Nimrod"

Publication Year: 1965
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• ### Discussion on "Layer-type transformer-winding cooling factors derived from analogue solution of the governing equations"

Publication Year: 1965, Page(s):125 - 126
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• ### Proposed modification to a solid-rotor alternator

Publication Year: 1965
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• ### Chairman's address: Science and General Division. The design and control revolution

Publication Year: 1965, Page(s):127 - 136
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First Page of the Article
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• ### Extremum or hill-climbing regulation: a statistical theory involving lags, disturbances and noise

Publication Year: 1965, Page(s):137 - 150
Cited by:  Papers (2)
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Extremum or hill-climbingÂ¿ regulation is the technique of optimising the performance of a continuous process by trial-and-error adjustment of the controlled variables. A highly simplified model of a process is considered here. It contains a convex quadratic characteristic or hillÂ¿, which represents the graph of the controlled variable versus the performance. This is disturbed both vertically a... View full abstract»

• ### Compensation of a.c. control systems subjected to carrier-frequency fluctuations

Publication Year: 1965, Page(s):151 - 158
Cited by:  Papers (1)
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A simple tracking filter is described that enables a parallel-T notch filter to be used for stabilising a.c.-control systems in which the frequency of the supply is subject to large variations. It is shown that the null parallel-T network, with the notch sharpened by feedback, has an effect in an a.c.-control system very similar to the effect of a phase-advance network in a d.c.-control system. Th... View full abstract»

• ### Design and performance of thickness-shear vibrating quartz filter crystals

Publication Year: 1965, Page(s):159 - 168
Cited by:  Papers (1)
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A study has been made of the effect of crystal-blank and electrode geometries on the performance of AT-cut and BT-cut quartz-crystal units intended for use in filters. Methods for controlling the frequencies and activities of unwanted modes of vibration are described, and it is shown that, by scaling the geometries, it is possible to translate crystal designs from one frequency to another. At freq... View full abstract»

• ### Measurement of iron losses in magnetic sheet steel subjected to a high alternating magnetic field

Publication Year: 1965, Page(s):169 - 178
Cited by:  Papers (3)
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Two sets of apparatus, one at Manchester the other at Sheffield, designed to measure iron losses in sheet-steel samples magnetised at high flux densities, are described. The measurements were carried out in each case by a different thermal method. Many of the difficulties common to all thermal measurements were present, and errors were only reduced by careful techniques and attention to detail. Tw... View full abstract»

## Aims & Scope

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

Full Aims & Scope