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Component Parts, IRE Transactions on

Issue 3 • Date Dec 1956

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Displaying Results 1 - 8 of 8
  • Impregnation of Toroids for High-Temperature Service

    Page(s): 113 - 115
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (496 KB)  

    Two materials have been used successfully for vacuum impregnation of magnetic amplifiers and similar devices for continuous operation at 325°F or higher. Complete impregnation, even through layers of interwinding tape, has been achieved. One material is an undiluted silicone rubber capable of withstanding 500°F continuously. The other is a rigid, filled epoxy resin using a nonvolatile hardner, which will withstand 325°F continuously. With proper design, both materials will withstand high accelerations in vibration between --65°F and their maximum operating tempera- ture. View full abstract»

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  • Reliable Precision Wirewound Resistor Design

    Page(s): 116 - 119
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (720 KB)  

    The precision wirebound resistor has undergone fairly extensive design changes within the last four or five years. The old "open bobbin" style resistor has been completely replaced by the molded thermosetting plastic enclosed resistor. The new design is capable of performing at extremely low and high temperatures, and will withstand rugged environmental testing, such as salt water immersion, humidity testing with polarizing voltage, and repeated temperature cycling. Improvements in design and in wire insulation have made it possible to operate these new units at higher internal temperatures, thus increasing their power handling capability. The protection afforded by the encapsulated housing makes the use of fine wire feasible in military resistors with consequent increase in maximum resistance value. This paper compares the old and new resistors, and discusses some of the factors which influenced the new precision resistor de- sign. View full abstract»

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  • Some Basic Physical Properties of Silicon and How They Relate to Rectifier Design and Application

    Page(s): 110 - 113
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (728 KB)  

    The saturation range and the avalanche range of the reverse characteristic of a silicon rectifier and how these regions vary qualitatively with temperature and bulk characteristics of the silicon used are discussed. Also some reasons why these characteristics may vary from theoretical values are given. The forward current is discussed from the standpoint of the resistive component and conductivity modulation. The affects of temperature, device geometry, and bulk characteristics of both of these components are shown. In a general fashion, some problems concerning operating life and shelf life of packaged rectifiers are given. View full abstract»

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  • Miniaturized High-Altitude, High-Temperature Connectors

    Page(s): 105 - 109
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (736 KB)  

    A new series of miniaturized multicontact connectors for high-temperature high-altitude conditions has been developed. The degree of performance achieved represents a considerable advance in the connector art. Both nonshielded and shielded contact designs have been incorporated in these connectors. Three exceptional features under extreme environmental conditions characterize these connectors: at altitudes in the order of 70,000 feet and temperatures of -- 85°F., the connectors permit operation at 500 volts ac 60 and 400 cps and withstand test voltages of 1000 volts ac 60 cps. Connectors are moisture resistant continuously during a ninety day humidity exposure maintaining a minimum insulation resistance of 200 megohms. Operating temperatures for these connectors are +500°F. to --85°F. Design features and test data under the environmental conditions are presented. View full abstract»

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  • Synchro and Resolver Performance Definitions

    Page(s): 88 - 98
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1320 KB)  

    A consistent set of fundamental synchro and resolver definitions is presented with some application notes. The realizable performance of these units in a system is indicated. These definitions or Proposed Standards have been subdivided into three parts, as follows: I. Precision resolver definitions, II. Synchro control transmitter definitions, III. Synchro performance definitions. Each subject will be treated regarding definitions, schematic diagrams, errors, and pertinent data. View full abstract»

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  • Multipurpose Evaporated Metal Film Resistors

    Page(s): 119 - 124
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (872 KB)  

    Evaporated metal film resistors have been prepared on ceramic bases which have properties that compare favorably with wirewound resistors. These resistors have been tailor-made for several different types of application. A molded style is available for general purpose applications. A coated version in nine different wattage ratings is aimed at power resistor applications. For high-temperature or high-precision requirements, a special hermetically-sealed variety is undergoing field evaluation. Controlled resistance-temperature coefficients having positive, negative, or near-zero values can be obtained. These resistors have much lower inductance values than conventional wirewound resistors. In addition, they are smaller in size and have a weight advantage particularly for the higher resistance ranges. They offer potential advantages when used for miniaturization or airborne equipment. Performance characteristics for the various types are presented and compared to their wirewound analogs and the existing military specifications. View full abstract»

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  • Factors Affecting Attenuation of Solid Dielectric Coaxial Cables Above 3000 Megacycyles

    Page(s): 99 - 105
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1096 KB)  

    Computations of contributary dielectric, inner conductor stranding and plating, outer conductor coverage and leakage, contact resistance, braid pressure and plating losses, and comparison with laboratory data indicates that the major emphasis to obtain low-loss cables, for use at frequencies above 3 kmc, rests with the outer conductor construction. View full abstract»

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  • The Application of Large Capacitors for Use in Energy Storage Banks

    Page(s): 81 - 88
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1096 KB)  

    In this paper, the explosively increasing demand for energy storage capacitor applications is discussed with particular reference to the various special characteristics required and how they affect the cost, mechanical configuration, circuitry, and protection requirements. Of particular importance at this time, there is included a discussion of means of accomplishing lower inductance and "Q" factor improvement over conventional design. A brief discussion of capacitor fundamentals contributing to the control of discharge waves is presented to illustrate the need for precise determination of circuit characteristics and electrical parameters. Several application problems are discussed, illustrating all of the factors pertinent to the design requirements, and how to obtain them. Since most of these installations represent considerable investment and frequently the need for high reliability, means for protection both against voltage overshoot and isolation in the event of unit failure is also discussed. Thus, the information presented establishes the criteria for selection of large banks of capacitors under the most favorable economic and technical comditions, along with an assurance of reliable performance without excessive unused safety factor dollars. View full abstract»

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Aims & Scope

This Transaction ceased production in 1962. The current publication is titled IEEE Transactions on Components, Packaging, and Manufacturing Technology.

Full Aims & Scope