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    • 135. 发明公开
    • CAPACITANCE MEASURING CIRCUIT, CAPACITANCE MEASURING INSTRUMENT, AND MICROPHONE DEVICE
    • KAPAZITÄTSMESSSCHALTUNG,KAPAZITÄTSMESSINSTRUMENTUND MIKROFONEINRICHTUNG
    • EP1424563A1
    • 2004-06-02
    • EP02798044.0
    • 2002-09-06
    • SUMITOMO METAL INDUSTRIES, LTD.
    • YAKABE, Masami c/o Tokyo Electron LimitedIKEUCHI, Naoki c/o Tokyo Electron Limited
    • G01R27/26G01D5/24G01N27/22H04R3/06
    • H04R29/004G01N27/22H04R19/04
    • An electrostatic capacitance detection circuit 10 comprises an AC voltage generator 11, a first operational amplifier 14 of which non-inverting input terminal is connected to specific potential (a ground in this example), a second operational amplifier 16 that includes a voltage follower, a resistance (R1) 12 connected between the AC voltage generator 11 and an inverting input terminal of the first operational amplifier 14, a resistance (R2) 13 connected between the inverting input terminal of the first operational amplifier 14 and an output terminal of the second operational amplifier 16, and an impedance element (a capacitor) 15 connected between an output terminal of the first operational amplifier 14 and a non-inverting input terminal of the second operational amplifier 16, and a capacitor to be detected 17 is connected between the non-inverting input terminal of the second operational amplifier 16 and specific potential. The electrostatic capacitance detection circuit 10 and the capacitor 17 are located adjacently.
    • 静电电容检测电路10包括AC电压发生器11,其非反相输入端连接到特定电位的第一运算放大器14(在该示例中为地),包括电压跟随器的第二运算放大器16, 连接在交流电压发生器11和第一运算放大器14的反相输入端之间的电阻(R1)12,连接在第一运算放大器14的反相输入端和第二运算放大器14的输出端之间的电阻(R2) 放大器16和连接在第一运算放大器14的输出端和第二运算放大器16的非反相输入端之间的阻抗元件(电容器)15和待检测电容器17连接在非易失性存储器16之间。 第二运算放大器16的反相输入端子和特定电位。 静电电容检测电路10和电容器17相邻配置。
    • 138. 发明公开
    • Thread joint for tube
    • GewindeverbindungfürRohre
    • EP1387036A2
    • 2004-02-04
    • EP03020578.5
    • 1995-10-17
    • Sumitomo Metal Industries, LtdVALLOUREC MANNESMANN OIL & GAS FRANCE
    • Nagasaku, Shigeo, Sumitomo Metal Ind. Ltd.Maeda, Jun, Sumitomo Metal Ind. Ltd.Ohyabu, Kenichi, Sumitomo Metal Ind. Ltd.Narita, Akira, Sumitomo Metal Ind. Ltd.
    • E21B17/042F16L15/06
    • E21B17/042F16L15/004
    • In a thread joint of a surface-sealing type used for a tube, in which a pin portion including a male thread formed in a tapering configuration with respect to an axis of a tube, a sealing portion formed in a tapering configuration at a tip of the male thread, and a shoulder portion formed at a tip of the sealing portion, and a box portion including a female thread formed in a tapering configuration with respect to an axis of a tube, a sealing portion formed in a tapering configuration in a back part of the female thread, and a shoulder portion formed in a back part of the sealing portion, are screwed in into each other and bound so that sealing portions come into contact with each other and shoulder portions are abut each other, wherein a precedent-stage unthread portion is disposed between the male thread and the sealing portion of the pin portion, and inclination of which is smaller than that of the sealing portion of the pin portion, and the precedent-stage unthread portion and the sealing portion of the pin portion are connected to each other by a curve tangent to the sealing portion, when the curve includes a plurality of arcs, a distance L a from a contact point X between the sealing portion and the curve to an end point Z of the arc tangent to the sealing portion is 1.45mm or larger, and when the curve is a single arc, a distance L b from the contact point X to a boundary Y between the precedent-stage unthread portion and the sealing portion is 1.45mm or larger.
    • 在用于管的表面密封型的螺纹接头中,其中包括相对于管的轴线形成为锥形构造的阳螺纹(11)的销部分(10),密封部分(12) 形成在所述阳螺纹(11)的前端的锥形构造,以及形成在所述密封部(12)的前端的肩部(13)和形成有阴螺纹(21)的箱部(20) 在相对于管的轴线呈锥形的构造中,形成在阴螺纹(21)的后部中的锥形构造的密封部分(22)和形成在阴螺纹(21)的后部中的肩部(23) 密封部分(22)彼此拧紧并且结合,使得密封部分(12,22)彼此接触并且肩部部分(13,23)彼此邻接,其中先前无节段部分 14)设置在外螺纹(11)和销部(10)的密封部分(12)之间,其倾斜度小于t 销部分(10)的密封部分(12)和销部分(10)的前级无螺纹部分(14)和密封部分(12)之间的曲线(15)彼此连接 ),当所述曲线(15)包括多个弧时,距所述密封部分(12)和所述曲线(15)之间的接触点X到所述曲线(15)的终点Z之间的距离La 与密封部相切的圆弧为1.45mm以上,当曲线(15)为单弧时,从接触点X到前级无螺纹部(14)与密封部之间的边界Y的距离Lb (12)为1.45mm以上。