Scheduled System Maintenance:
Some services will be unavailable Sunday, March 29th through Monday, March 30th. We apologize for the inconvenience.
By Topic

Electrical Engineering

Issue 12 • Date Dec. 1946

Filter Results

Displaying Results 1 - 25 of 46
  • [Front cover]

    Publication Year: 1946 , Page(s): c1
    Save to Project icon | Request Permissions | PDF file iconPDF (231 KB)  
    Freely Available from IEEE
  • [Advertisement - Front inside cover]

    Publication Year: 1946 , Page(s): c2
    Save to Project icon | Request Permissions | PDF file iconPDF (914 KB)  
    Freely Available from IEEE
  • Contents

    Publication Year: 1946 , Page(s): 1
    Save to Project icon | Request Permissions | PDF file iconPDF (379 KB)  
    Freely Available from IEEE
  • [Advertisements]

    Publication Year: 1946 , Page(s): 2
    Save to Project icon | Request Permissions | PDF file iconPDF (943 KB)  
    Freely Available from IEEE
  • Highlights

    Publication Year: 1946 , Page(s): 3
    Save to Project icon | Request Permissions | PDF file iconPDF (291 KB)  
    Freely Available from IEEE
  • [Advertisements]

    Publication Year: 1946 , Page(s): 4 - 8
    Save to Project icon | Request Permissions | PDF file iconPDF (2197 KB)  
    Freely Available from IEEE
  • Train communications

    Publication Year: 1946 , Page(s): 9 - 553
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (987 KB)  

    During the past few years many railroad companies have conducted extensive tests of inductive and radio carrier communication systems. Excerpts from reports of these tests point out that these systems though not perfect are already rendering useful service. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Science, politics, and the national welfare

    Publication Year: 1946 , Page(s): 554 - 556
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (342 KB)  

    Originally presented as an address before the recent National Electronics Conference in Chicago, this article considers one viewpoint in the current controversy over the question of government support of scientific research. The author takes his stand on the side of federal promotion of science, provided the policy to be pursued is both scientifically and politically acceptable. Undoubtedly, some readers will take issue with him. Truly, here is food for serious thought, and potential for extended debate. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Slow-acting relays: I. Historical aspects

    Publication Year: 1946 , Page(s): 557 - 558
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (367 KB)  

    Slow-acting relays have been the unobtrusive little behind-the-scenes timing-control elements in various kinds of electrical installations for so long that they now are taken for granted. Although supervisory control, telemetering, and protective relay systems for electric power systems, have been covered extensively in technical literature, the role played by the slow-acting relay for the most part has been passed over. In a like manner, much has been written about machine switching in automatic telephony, but little has been said about the slow-acting relays at the heart of the works. Aware of this deficiency in published information, the AIEE committee on communications, under direct sponsorship of the subcommittee on quick and slow-acting relays, arranged a conference at the 1946 AIEE winter convention for the purpose of preliminary exploration of the subject and of the interest in it. The essential substance of that material is presented in these articles. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • II. Use in telephone switching

    Publication Year: 1946 , Page(s): 558 - 560
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (529 KB)  

    ATYPICAL RELAY, used by the millions in telephone offices, in shown in Figure 1 — the U-type relay. This particular type is not a slow relay; its action time is about 1/20th second or less. It can be slowed, however, to give times in the range from 50 to 500 milliseconds, which is the ordinary range of delay in telephone relays. These delays can be obtained — at reasonable cost, with reasonable accuracy, and without too great a sacrifice in number of contacts — through application of the principles to be outlined. Primarily, these delays are obtained by the use of short-circuited turns to oppose a change in magnetization, and by using the properties of the relay upon disconnection of the circuit, not on closure, because of the greater stability of a relay upon its release. The subject of this article then narrows down to the principles underlying slow-release relays. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • III. Telephone-type relays

    Publication Year: 1946 , Page(s): 560 - 562
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (619 KB)  

    THE TIME INTERVAL required for the closing or opening of a relay contact after the current is applied or removed, is dependent upon the balance of mechanical forces acting on the mass of the armature. These balanced forces are the spring load force, the magnetic operating force, the frictional force, and the force of acceleration. Because changes in the magnetic forces occur when the armature is unoperated, while it is moving through its stroke, and also after it is operated, it is necessary to show the relationship of the magnetic forces as a function of armature stroke at constant ampere-turn values and the magnetic forces as a function of ampere turns at various armature stroke positions. The curve of Figure 8 shows these relationships in a typical telephone-type relay structure carrying an operating load of 12 make-contacts and operating with zero residual. air gap. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IV. Use for power purposes

    Publication Year: 1946 , Page(s): 562 - 563
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (456 KB)  

    THE APPLICATION of telephone relays in the power field is not new. These relays have been in use for years by many utility companies on special applications. The larger power manufacturers have used them as elemental units in telemetering, selective calling on carrier telephone circuits, carrier relay protection, protective distance relaying, and also in supervisory control. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Organization of the engineering profession

    Publication Year: 1946 , Page(s): 563 - 564
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (314 KB)  

    This searching consideration of the question of organizing or reorganizing the engineering profession is presented for the purpose of stimulating additional thought and discussion by the entire AIEE membership. The author, speaking in the light of experience as president of the Texas Society of Professional Engineers and vice-chairman of the AIEE membership committee, supports Plan B of the various proposals of the AIEE planning and co-ordination committee's professional activities subcommittee (EE, Apr '46, pp 169–73). He urges that collaboration and co-operation are more effective than attempted consolidation in view of the great diversity of interests among engineers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Great Lakes district meeting conference papers digested

    Publication Year: 1946 , Page(s): 565 - 569
    Save to Project icon | Request Permissions | PDF file iconPDF (506 KB)  
    Freely Available from IEEE
  • National electronics conference papers digested

    Publication Year: 1946 , Page(s): 569 - 574
    Save to Project icon | Request Permissions | PDF file iconPDF (634 KB)  
    Freely Available from IEEE
  • Institute activities: Winter meeting papers presented in four main groupings

    Publication Year: 1946 , Page(s): 575 - 576
    Save to Project icon | Request Permissions | PDF file iconPDF (401 KB)  
    Freely Available from IEEE
  • New AIEE publication policy becomes effective in January 1947

    Publication Year: 1946 , Page(s): 576 - 580
    Save to Project icon | Request Permissions | PDF file iconPDF (606 KB)  
    Freely Available from IEEE
  • Future AIEE meetings

    Publication Year: 1946 , Page(s): 580
    Save to Project icon | Request Permissions | PDF file iconPDF (293 KB)  
    Freely Available from IEEE
  • Contents announced for December 1946 supplement

    Publication Year: 1946 , Page(s): 580 - 581
    Save to Project icon | Request Permissions | PDF file iconPDF (707 KB)  
    Freely Available from IEEE
  • Abstracts

    Publication Year: 1946 , Page(s): 581 - 582
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (687 KB)  

    TECHNICAL PAPERS previewed in this section will be presented at the AIEE winter meeting, New York, N. Y., January 27–31, 1947, and will be distributed in advance pamphlet form as soon as they become available. Members may obtain copies by mail from the AIEE order department, 33 West 39th Street, New York 18, N. Y., at prices indicated with the abstract; or at five cents less per copy if purchased at AIEE headquarters or at the meeting registration desk. Prices for nonmembere will be twice those for members. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Personal

    Publication Year: 1946 , Page(s): 582 - 586
    Save to Project icon | Request Permissions | PDF file iconPDF (630 KB)  
    Freely Available from IEEE
  • Obituary

    Publication Year: 1946 , Page(s): 586 - 588
    Save to Project icon | Request Permissions | PDF file iconPDF (441 KB)  
    Freely Available from IEEE
  • Membership

    Publication Year: 1946 , Page(s): 588 - 589
    Save to Project icon | Request Permissions | PDF file iconPDF (368 KB)  
    Freely Available from IEEE
  • Of current interest: Second national electronics conference held in Chicago, October 3–5

    Publication Year: 1946 , Page(s): 590 - 593
    Save to Project icon | Request Permissions | PDF file iconPDF (692 KB)  
    Freely Available from IEEE
  • Future meetings of other societies

    Publication Year: 1946 , Page(s): 594 - 596
    Save to Project icon | Request Permissions | PDF file iconPDF (461 KB)  
    Freely Available from IEEE

Aims & Scope

This Periodical ceased publication in 1963. The current retitled publication is IEEE Spectrum.

Full Aims & Scope