Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics

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• Long time delays from a single magnetic storage core

Publication Year: 1959, Page(s):457 - 461
Cited by:  Papers (4)
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Accurate time delay devices are essential to both industrial and military control applications. Static time delay devices presently available provide time delays accurately and economically up to a few seconds. The emphasis on reliability in the industrial and military control fields has made it desirable that a static device be developed to generate the long time intervals required in these areas... View full abstract»

• Analysis of series-connected saturable reactor with capacitive loading and finite control resistance by use of difference equations

Publication Year: 1959, Page(s):461 - 471
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A series-connected saturable reactor with capacitive loading exhibits interesting features. The circuit may exhibit instability associated with a double or three-valued output corresponding to a given input depending on previous history of operation. In some ranges of circuit parameters and forcing function, the circuit may become regenerative thus oscillating at a low frequency modulating the car... View full abstract»

• Analysis of magnetic amplifiers without diodes

Publication Year: 1959, Page(s):471 - 485
Cited by:  Papers (1)
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Although there are many methods and procedures for analyzing complex circuits, probably the best-known general approach is to apply an organized, systematic procedure to the combination of the analytic expressions for the voltage-current characteristics of the individual circuit elements. To be able to apply this method of attack, it is essential that the characteristics of the individual circuit ... View full abstract»

• Analysis of magnetic amplifiers with diodes

Publication Year: 1959, Page(s):485 - 504
Cited by:  Papers (1)
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It has been demonstrated1 that the behavior of magnetic amplifiers without diodes can be analytically described by a set of linear difference equations relating the average values of voltages and currents at the ports. For most circuits this representation gives values which are accurate to within 1 or 2% of actual even for a large variety of waveforms of port and supply voltages. The reason for t... View full abstract»

• Standards for measurement of brightness intensification in fluoroscopic image intensifiers

Publication Year: 1959, Page(s):504 - 506
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It is convenient to characterize devices for production of intensified X-ray fluoroscopic images in terms of their brightness as compared with conventional fluoroscopic screens. Thus, an X-ray image intensifier is described having an intensification factor of 200 or 500 or 1,000 meaning that the image presented to the viewer is 200 or 500 or 1,000 times brighter than the image would be if he used ... View full abstract»

• The use of iterated laplace transformations in the solution of combined circuit-field problems

Publication Year: 1959, Page(s):506 - 511
Cited by:  Papers (1)
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By consideration of a detailed example, the use of iterated Laplace transformations is shown to be an important technique for the solution of combined circuit-field problems, i.e., problems in which the simultaneous solution of ordinary and partial differential equations is necessary. One- and 2-mesh circuits in which eddy currents in a rectangular magnetic core play a significant role are analyze... View full abstract»

• System synthesis with the aid of digital computers

Publication Year: 1959, Page(s):512 - 515
Cited by:  Papers (2)
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The conventional procedure for designing systems with many physical parameters is discussed and the translation of this procedure into digital computer operations is considered. Although it is possible to code all of the routine design calculations for a computer, it is impossible to program the insight of the design engineer. It is shown that the determination of the physical parameters for the o... View full abstract»

• The numerical-graphical method in the design of multiterminal switching circuits

Publication Year: 1959, Page(s):515 - 519
Cited by:  Papers (1)
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Up to the present time there has been no satisfactory direct method for designing multiterminal switching circuits. A common approach is to consider each output individually and derive a 2-terminal network for it. An attempt is then made to change the form of the individual 2-terminal networks, if possible, so that combinations between paths may be facilitated. This may be done, for example, by al... View full abstract»

• Recommended symbols for magnetic amplifier papers ¿¿ A report

Publication Year: 1959, Page(s):519 - 521
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For the purpose of increasing the uniformity of symbols in magnetic amplifier papers, Mr. Harold W. Lord, chairman of the AIEE Magnetic Amplifier Committee, asked the Theory Subcommittee to prepare a list of recommended symbols. View full abstract»

• Observation of transients in the series-connected saturable reactor with high-impedance control source

Publication Year: 1959, Page(s):521 - 526
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In a series-connected saturable reactor working in the proportional mode with its control winding fed by a direct current from a high impedance source, the gate current as a function of time has a rectangular shape and its amplitude, in ampere turns, is equal to the magnitude of the control current.1 Full-wave rectification of the gate current yields a direct current closely proportional to the co... View full abstract»

• Graphical analysis of full-wave magnetic amplifier control characteristics affected by control-circuit resistance

Publication Year: 1959, Page(s):526 - 530
Cited by:  Papers (1)
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Several papers have been published on the correlation between the control characteristics of magnetic amplifiers and the magnetization characteristics of magnetic cores.1Â¿5 However, the approaches hitherto inaugurated on this subject of great importance have failed in elucidating the problem concerning the effect of control-circuit resistance (CCR) on the control characteristics of full-wave magn... View full abstract»

• A one-watt solar power plant

Publication Year: 1959, Page(s):530 - 535
Cited by:  Papers (1)
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Shortly after the announcement1 of the invention of the Bell Solar Battery, Bell Telephone Laboratories undertook an exploratory development program with a twofold purpose. First, device designers wanted to learn how to make large quantities of silicon photodiodes, how to devise reliable connections to the active parts of the diode, and if possible, how to increase the realizable efficiency of con... View full abstract»

• Statistical spectral output of power law nonlinearity

Publication Year: 1959, Page(s):535 - 543
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One of the objectives of analyzing a system is to determine if there are periodic oscillations and, if so, what their amplitude and frequency will be; another objective is to determine the magnitudes of output errors and output powers, when the statistical character of the input signal and noises are known. Methods are given for calculating the output power and the error power for nonlinearities d... View full abstract»

• Spectral output of piecewise linear nonlinearity

Publication Year: 1959, Page(s):543 - 549
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The transference or effective gain of a piecewise linear component is derived. The output autocorrelation function of a clipper, a dead zone, and a general piecewise linear nondynamic component is obtained by a double integration of the second probability density. The output power is a sum of Gaussian error integrals. This can be divided into fundamental or correlated power, and distortion power d... View full abstract»

• Indialing to PBX extensions: Application in a step-by-step central office area

Publication Year: 1959, Page(s):549 - 554
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Up to the present time, the completion of an incoming call to a private branch exchange (PBX) extension telephone has been dependent upon a human attendant. She must determine what extension station is desired and do the proper switching of the call from the incoming trunk to the station. Indialing provides a means whereby the call is dialed directly from the general exchange system to the PBX sta... View full abstract»

• Basic concepts of multidimensional space filters

Publication Year: 1959, Page(s):554 - 561
Cited by:  Papers (1)
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The conventional electric network, consisting of linear or one-dimensional RLC (resistance-inductance-capacitance) elements, may be generalized by adding to it planar-, cubic-, etc., up to k-dimensional RLC elements. The resultant geometrical configuration of 0-, 1-, 2-Â¿ to k-dimensional spatial networks interconnected into one structure is called, in combinatorial topology, a Â¿polyhedron.Â¿ Its... View full abstract»

• Inductance of A-C magnets from simple models

Publication Year: 1959, Page(s):562 - 568
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The inductance of an a-c magnet is a function of its coil as well as its magnetic structure. Hence, if the total equivalent permeance of the magnetic field is known, the inductance can be obtained from the equation $L = N^{2} p_{eq} (10^{-8}) eqno {hbox{(1)}}$ where L = inductance, henrys N = series turns in the coil peq = equivalent permeance, lines/ampere Because computing the permeance of even ... View full abstract»

• A new direct matrix inversion method

Publication Year: 1959, Page(s):568 - 572
Cited by:  Papers (22)
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This paper describes a special-purpose matrix inversion technique developed in the System-Planning Branch of TVA (Tennessee Valley Authority). This is the first known use of the method. It is particularly applicable to the inversion of matrices that describe power system impedances or admittances. As outlined, the technique is not entirely general. It requires division by elements of the major dia... View full abstract»

• A new approach to training telephone engineers

Publication Year: 1959, Page(s):572 - 576
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A picture of telephone engineers living in a college dormitory, eating in a college dining hall, and walking across a campus to classes on communications theory conducted by college professors is an intriguing one. This has been taking place during the past year in South Carolina. It is part of a new method of providing technical training to experienced telephone engineers developed by the School ... View full abstract»

• Analysis and design of a transistor linear-delay circuit

Publication Year: 1959, Page(s):577 - 580
Cited by:  Papers (1)
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In this paper an analysis is presented of the emitter-coupled linear-time-delay circuit as well as a systematic design procedure which starts with a practical set of specifications. Some important fundamental limitations on the operation and design of the circuit are also presented. Experimental data are included to give an idea of the range of validity of the theory. A range of the ratio of maxim... View full abstract»

• An equivalent circuit for transformers in which nonlinear effects are present

Publication Year: 1959, Page(s):580 - 586
Cited by:  Papers (1)
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Textbooks dealing with the subjects of transformer theory and design generally use the T-equivalent circuit to represent the inductive parameters of a transformer. This paper will point out a limitation of the T-equivalent circuit and will show that the Â¿-equivalent circuit has no such limitation. View full abstract»

• SPUD, a stored-program universal demonstrator for computer training

Publication Year: 1959, Page(s):586 - 594
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Considerable difficulty is usually encountered by the novice in understanding how stored-program information-processing systems operate, and how they can be programed. While conventional teaching tools are definitely inadequate in this case, the use of a commercial computer for demonstrations does not provide an ideal solution either, because the machine tends to overwhelm the novice with its spee... View full abstract»

• Experience with long-distance television fields used for retransmission

Publication Year: 1959, Page(s):594 - 596
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It has been known for some time that long-distance (100Â¿150 miles) very-high frequency propagation exists, and is capable of wide-band performance. This paper follows the empirical investigation of these fields to their ultimate use as signal sources for a community antenna system (CATV) and a television station (WSVA-TV). View full abstract»

• The use of automatic programing techniques for solving engineering problems

Publication Year: 1959, Page(s):596 - 601
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There are four large-scale digital computers at Westinghouse Electric Corporation employed in making engineering calculations: one International Business Machine Corporation (IBM) 705 and three IBM 704's (Table I). This paper summarizes the experience with automatic coding systems at these four installations. View full abstract»

• A study of thermal deterioration of kraft pulps using a mass spectrometer

Publication Year: 1959, Page(s):602 - 606
Cited by:  Papers (4)
| | PDF (1222 KB)

As thermal deterioration of electrical insulating materials is directly connected with their lives it has been an important problem since electric machines and apparatuses were put to practical use. Nevertheless, a thorough study has not been made on the subject because quite a long time is required for testing the lives of the materials and also because numberless combinations and many working co... View full abstract»

Aims & Scope

This Transactions ceased publication in 1963. The current retitled publication is  IEEE Transactions on Communications.

Full Aims & Scope