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IBM Journal of Research and Development

Issue 3 • Date May 1972

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Displaying Results 1 - 19 of 19
  • Preface: Mechanical Technology

    Publication Year: 1972, Page(s): 202
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (163 KB)

    This issue of the Journal is devoted entirely to mechanical technology, in recognition of an engineering discipline that plays a large and growing role in the development of business machines. We have selected papers that we believe are representative of the variety of work now being done by IBM, and have emphasized methods and results that havpeo tential application beyond the specific problems f... View full abstract»

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  • Mechanics of Film Adhesion: Elastic and Elastic-Plastic Behavior

    Publication Year: 1972, Page(s):203 - 213
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (580 KB)

    A peel test is a useful method for comparing the behavior of various adherends and adhesives. An exact analysis of the mechanics of the peel test would be of great help in the interpretation of test results in terms of the bulk properties of the materials, and of the failure mechanism of the bond. The existing theories of peeling apply to elastic peel films, very thin elastic or viscoelastic adhes... View full abstract»

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  • Viscoelastic Behavior of Computer Tape Subjected to Periodic Motion

    Publication Year: 1972, Page(s):214 - 221
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (513 KB)

    The purpose of this study was to develop a theoretical means for predicting the longitudinal motion of computer tape in a high-performance tape drive. In particular, this paper treats the motion that is governed by traveling velocity-stress wave reflections, attenuations, and interactions in the length of tape between the tangency point at the capstan and the tangency point at the stubby column in... View full abstract»

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  • Dynamic Control of Spring-driven Mechanisms

    Publication Year: 1972, Page(s):222 - 230
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (632 KB)

    A common method for moving a machine member from one position to another is the use of a spring. Spring-driven devices are simple, inexpensive, and easy to implement; however, the velocity characteristics of such devices leave much to be desired. The velocity increases from the initial position to the final position resulting in a maximum velocity, and therefore maximum energy in the mechanism, at... View full abstract»

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  • IBM Copier Scanning System

    Publication Year: 1972, Page(s):231 - 238
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (435 KB)

    The quality of the copy to be produced by the IBM Copier was of utmost importance in the machine development. This dictated that the amplitude of the vibrations of the document scanning system during scan be limited to a very low level. The design considerations, analysis, simulation, and instrumentation used to assure adequate performance of the system are described. View full abstract»

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  • Some Design Considerations for a Document Sorting Machine

    Publication Year: 1972, Page(s):239 - 248
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (542 KB)

    A document reader-sorter is analytically studied to determine the effect of document velocity on the number of documents that can be sorted reliably in a given interval of time, and a formula is derived that relates the effect of various design parameters to the throughput of a document sorting machine. One of these parameters, selector response time (i.e., indexing time), is investigated in detai... View full abstract»

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  • Acoustic Signal Analysis for Noise Source Identification in Mechanisms

    Publication Year: 1972, Page(s):249 - 257
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (547 KB)

    Proper interpretation of the time and frequency characteristics of machine noise provides information useful in identifying and quantifying noise sources in complex mechanisms. The use of commercial acoustic instrumentation led to the development of unique analog instrumentation for noise-time analysis and ultimately to a real-time analog-digital signal analysis capability. The hybrid system descr... View full abstract»

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  • Holographic Interferometry Deformation Study of a Printer Type-piece

    Publication Year: 1972, Page(s):258 - 268
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (813 KB)

    Holographic interferometry with a pulsed ruby laser is used to determine printer type-piece deformation caused by impact of the print hammer. A variety of type-piece designs are examined. Effects of impact velocity and hammer-type-piece alignments are studied. Means of obtaining stress information from the holographic data are considered. Cubic spline methods are used to smooth the holographic dat... View full abstract»

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  • An Application of White Light Interferometry in Thin Film Measurements

    Publication Year: 1972, Page(s):269 - 276
    Cited by:  Papers (20)  |  Patents (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (560 KB)

    An application of the white light interferometry technique has been developed for measuring the thickness of thin films. The technique is used in the development of sliders which serve as carriers for the magnetic transducers (read/write elements) that operate in close proximity to magnetic disks. With the proper design of a surface contour and the applied load on the slider, a self-acting air bea... View full abstract»

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  • Removal of Numerical Instability in the Solution of Nonlinear Heat Exchange Equations

    Publication Year: 1972, Page(s):277 - 282
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (417 KB)

    Current relaxation methods used by most large-scale thermal-computation programs for solving steady-state temperature distributions are subject to numerical instability when radiation is present in the system under study. The instability is usually due to the linearization of the numerical formulation of the governing equations and manifests itself as an oscillatory or divergent solution. A new me... View full abstract»

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  • Design and Fabrication of Heat Transfer Surfaces from Superplastic Material

    Publication Year: 1972, Page(s):283 - 291
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (571 KB)

    The production of complex heat transfer surfaces (i.e., those without straight fins) is restricted by available fabrication techniques, materials, geometries, and cost. Based on the superplastic sheet thermoforming process, a new technique for fabricating these complex surfaces by a relatively simple, low cost process has been developed. The resulting surfaces have excellent heat transfer characte... View full abstract»

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  • Stationary Temperature Profiles and Heat Flux Distribution in a Plastic-encapsulated Circuit Package

    Publication Year: 1972, Page(s):292 - 302
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (610 KB)

    Thermal characteristics that are important to structural integrity are analyzed herein for a TTL, plastic-encapsulated package. By assuming that total module heat during operation is engendered at idealized junctions between lead wires and the chip surface, an analysis of its dissipation has been undertaken to determine internal steady-state temperature profiles and heat flux distribution. Based o... View full abstract»

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  • Analytical and Experimental Thermal Analysis of Multiple Heat Sources in Integrated Semiconductor Chips

    Publication Year: 1972, Page(s):303 - 306
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (449 KB)

    Because of the complexity and interconnection density of today's integrated circuit chips, experimental measurement of individual transistor or diode junction temperatures under typical powered conditions has become increasingly difficult. In order to provide meaningful thermal data, other approaches have had to be devised. In the work described by this paper, an analytical model has been used to ... View full abstract»

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  • Monitoring Microinch Displacements in Ultrasonic Welding Equipment

    Publication Year: 1972, Page(s):307 - 312
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (449 KB)

    This communication describes two non-contacting techniques for dynamic measurement of high frequency microinch displacements, which have been applied in monitoring the dynamic displacement of the magnetostrictive transducer system used in ultrasonic welding. One technique consists of a light reflecting scheme that uses a fine fiber optic probe. The probes are available in a range of sizes and, in ... View full abstract»

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  • Design Considerations for a Magneto-optic Cryogenic Film Memory

    Publication Year: 1972, Page(s):313 - 319
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (471 KB)

    It has been shown that certain materials, because of their ability to rotate the polarization vector of plane polarized light, can be applied to very large data-stores. One such material (iron-doped europium oxide) requires an operating temperature below 100 K. To produce an experimental device with superior cost/performance, a rotating disk file configuration was chosen. In developing this machin... View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1972, Page(s):320 - 324
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (462 KB)

    Reprints of the pupers listed here may usually be obtained most efficiently by writing directly to the authors. The authors' IBM divisions and locations are identified us follows: ASDD is the Advanced Systems Development Division; CD, Components Division; DPD, Data Processing Division; FED, Field Engineering Division; FSD, Federal Systems Division; GSD, General Systems Division; OPD, 0ffice Produc... View full abstract»

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  • Recent IBM Patents

    Publication Year: 1972, Page(s):325 - 328
    IEEE is not the copyright holder of this material | PDF file iconPDF (376 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1972, Page(s):329 - 331
    IEEE is not the copyright holder of this material | PDF file iconPDF (344 KB)
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1972, Page(s):332 - 333
    IEEE is not the copyright holder of this material | PDF file iconPDF (211 KB)
    Freely Available from IEEE

Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center