Reduced size electro-acoustic transducer with improved terminal
    11.
    发明授权
    Reduced size electro-acoustic transducer with improved terminal 失效
    减小尺寸的电声换能器具有改进的终端

    公开(公告)号:US5955824A

    公开(公告)日:1999-09-21

    申请号:US901598

    申请日:1997-07-28

    CPC分类号: H04R17/00

    摘要: A piezoelectric electro-acoustic transducer eliminates a negative influence caused by metal terminals upon the sound pressure and resonant frequency characteristics even when size and thickness reduction of the transducer are made. The transducer includes a piezoelectric diaphragm which includes a piezoelectric ceramic plate and a metal plate stored in a casing. The transducer also includes metal terminals in contact with the piezoelectric diaphragm and extending to the outside of the casing. The modulus of elasticity X of one metal terminal is specifically determined to be within a range defined by: ##EQU1## where E (N/m.sup.3) is the Young's modulus of one metal terminal in contact with a piezoelectric element, b (mm) is the width of part of the metal terminal extending from the inside of the casing to the outside thereof, h (mm) is the thickness of the metal terminal, and L (mm) is the length of the metal terminal.

    摘要翻译: 压电电声换能器消除了由金属端子对声压和谐振频率特性造成的负面影响,即使在换能器的尺寸和厚度减小时也是如此。 换能器包括压电振膜,其包括压电陶瓷板和存储在壳体中的金属板。 换能器还包括与压电振膜接触并延伸到壳体外部的金属端子。 一个金属端子的弹性模量X具体确定在以下范围内:E(N / m3)是与压电元件接触的一个金属端子的杨氏模量,b(mm)是 金属端子的一部分从壳体的内部延伸到外部,h(mm)是金属端子的厚度,L(mm)是金属端子的长度。

    Pattern drawing apparatus
    12.
    发明授权
    Pattern drawing apparatus 失效
    图案绘图仪

    公开(公告)号:US5757019A

    公开(公告)日:1998-05-26

    申请号:US611772

    申请日:1996-03-06

    摘要: A pattern drawing apparatus is provided. This apparatus draws a pattern on an object by irradiating the object with an electron beam. A pattern data corresponding to the pattern to be drawn is stored in a memory. The pattern data is sent to a controller that controls irradiation of the electron beam to the object. Check is made whether the controller correctly controls the irradiation of the electron beam in accordance with the stored pattern data. Another memory stores the pattern data per a predetermined number of bits included in the pattern data. The bit data is sent to the controller that generates high and low voltages to control the irradiation of the electron beam. A counter counts the numbers of bits and high or low voltages. A comparator compares the counted numbers of bits and voltages. The comparison results are sent to an indicator that indicates an error when the counted numbers are different from each other. The counted numbers themselves may be indicated. Instead of the comparator, an exclusive-OR circuit may be provided. The bits of the pattern data are exclusive-ORed with the voltages expressed as bits. The output of the exclusive-OR circuit may be indicated as a bit map. Further, the bits of the pattern data and the voltages also may be indicated as bit maps.

    摘要翻译: 提供了图案描绘装置。 该装置通过用电子束照射物体来在物体上绘制图案。 对应于要绘制的图案的图案数据被存储在存储器中。 图案数据被发送到控制器,其控制对对象的电子束的照射。 检查控制器是否根据存储的模式数据正确地控制电子束的照射。 另一个存储器存储图案数据中包含的预定位数的图案数据。 位数据被发送到产生高电压和低电压的控制器,以控制电子束的照射。 计数器对位数和高电平或低电压进行计数。 比较器比较计数的位数和电压。 比较结果被发送到指示器,其指示当计数的数字彼此不同时的错误。 可以指示自己计数的数字。 代替比较器,可以提供异或电路。 模式数据的位与表示为位的电压异或。 异或电路的输出可以被指示为位图。 此外,图案数据和电压的位也可以表示为位图。

    Airfoil blade for impeller fan and manufacturing method thereof
    13.
    发明授权
    Airfoil blade for impeller fan and manufacturing method thereof 失效
    叶轮风机叶片及其制造方法

    公开(公告)号:US4971521A

    公开(公告)日:1990-11-20

    申请号:US343878

    申请日:1989-04-27

    摘要: An airfoil blade for a fan impeller, includes one blade surface portion formed by extrusion molding. A plurality of ribs are integrally formed with the one blade surface portion to extend upwardlyf rom it in generally a vertical direction and having heights as will provide a curve line for the other curved blade surface portion when end faces of the ribs are connected to each other. A sheet material is applied onto the ribs along their end faces to provide the other curved blade surface portion so as to form a blade configuration of the airfoil blade having a leading edge and a trailing edge and including hollow portions in it.

    摘要翻译: 用于风扇叶轮的翼型叶片包括通过挤压成型形成的一个叶片表面部分。 多个肋与一个叶片表面部分一体地形成,以在大致垂直方向上向上延伸并具有高度,当肋的端面彼此连接时,将为另一个弯曲叶片表面部分提供曲线 。 沿着它们的端面将片状材料施加到肋上以提供另一个弯曲的刀片表面部分,以便形成具有前缘和后缘并且在其中的中空部分的翼型刀片的刀片构造。

    Co-condensation product and rubber composition containing the same
    15.
    发明授权
    Co-condensation product and rubber composition containing the same 失效
    共缩合产物和含有它们的橡胶组合物

    公开(公告)号:US5717053A

    公开(公告)日:1998-02-10

    申请号:US410206

    申请日:1995-03-24

    CPC分类号: C08G8/24 C08L21/00 C08L7/00

    摘要: There is provided a co-condensation product obtainable by subjecting a p-alkylphenol to reaction with formaldehyde in the presence of an alkali catalyst to prepare a resol type condensate, and subjecting the resulting resol type condensate to reaction with a m-substituted phenol such as resorcin in the presence of an acid catalyst, wherein the content of the m-substituted phenol is not higher than 4% by weight, and the content of a component having a molecular weight not higher than 1,000 excluding both the p-alkylphenol and the m-substituted phenolis at least 25% by weight based on the total weight of the co-condensation product. This co-condensation product is low in fuming and in hygroscopic properties, exhibits excellent adhesiveness in vulcanizing adhesion between rubber and a reinforcing material, and further provides a vulcanized rubber article of high hardness.

    摘要翻译: 提供了一种共缩合产物,其可通过在碱催化剂存在下使对烷基酚与甲醛反应以制备甲阶型缩合物,并将得到的甲阶酚醛型缩合物与间取代的苯酚如 间苯二酚,其中m取代酚的含量不高于4重量%,除了对烷基酚和m之外,分子量不高于1,000的组分的含量 - 取代的酚的至少25重量%,基于共缩合产物的总重量。 该共缩合产物发烟量低,吸湿性好,在橡胶与增强材料之间的硫化粘合性方面表现出优异的粘合性,并且还提供了高硬度的硫化橡胶制品。

    Rubber composition having excellent gripping power and rolling
resistance, and production thereof
    16.
    发明授权
    Rubber composition having excellent gripping power and rolling resistance, and production thereof 失效
    具有优异的夹紧力和滚动阻力的橡胶组合物及其制造

    公开(公告)号:US5362794A

    公开(公告)日:1994-11-08

    申请号:US89521

    申请日:1993-07-21

    摘要: A rubber composition comprising the following components:(A) a rubber component comprising at least 50% by weight of a styrene/butadiene copolymer rubber;(B) an azodicarboxylic ester compound represented by the formula ##STR1## wherein X is an alkyl of 3 to 8 carbon atoms, an unsubstituted or substituted phenyl, or an unsubstituted or substituted benzyl;(C) carbon black having a nitrogen absorption specific surface area of 100 to 250 m.sup.2 /g and a dibutyl phthalate absorption number of 110 to 170 ml/100 g;(D) sulfur; and(E) a benzothiazole vulcanization accelerator.This rubber composition shows a high loss factor (tan .delta.) in a low temperature range, and a low loss factor in a high temperature range which when applied to the production of automobile tires, achieves improved braking power on wet, snow covered or frozen road surfaces. Lowered rolling resistance during driving without loss in the strength characteristics of the composition are also exhibited.

    摘要翻译: 一种橡胶组合物,其包含以下组分:(A)包含至少50重量%的苯乙烯/丁二烯共聚物橡胶的橡胶组分; (B)由式(I)表示的偶氮二羧酸酯化合物,其中X为3-8个碳原子的烷基,未取代或取代的苯基,或未取代或取代的苄基; (C)氮吸收比表面积为100〜250m 2 / g的碳黑,邻苯二甲酸二丁酯吸收值为110〜170ml / 100g; (D)硫; 和(E)苯并噻唑硫化促进剂。 该橡胶组合物在低温范围内显示出高的损耗因子(tanδ),并且在应用于汽车轮胎的生产时在高温范围内的低损耗因子在湿润,积雪或冷冻道路上实现了改善的制动力 表面。 还表现出在驾驶中降低的滚动阻力,而不损失组合物的强度特性。

    Production of bisphenol monoester
    17.
    发明授权
    Production of bisphenol monoester 失效
    双酚A单体的生产

    公开(公告)号:US5214193A

    公开(公告)日:1993-05-25

    申请号:US834373

    申请日:1992-02-12

    摘要: A bisphenol monoester represented by the formula (I): ##STR1## wherein R.sup.1 is hydrogen or alkyl, R.sup.2 and R.sup.3 are each alkyl, and R.sup.4 is alkyl, alkenyl or phenyl, is produced by continuous two step reactions in which an aldehyde R.sup.1 -CHO and 2,4-dialkylphenol are subjected to a condensation reaction in a C.sub.6 -C.sub.10 aliphatic or C.sub.6 -C.sub.12 aromatic hydrocarbon solvent, and then a resulting bisphenol compound dissolved in the solvent is subjected to an esterification with a carboxylic acid R.sup.4 --COOH or its derivative. Prior to the esterification, the organic layer containing the bisphenol compound is subjected to a dehydration treatment, thereby enabling the two steps to proceed continuously without isolating the intermediate bisphenol compound. A purification process for the bisphenol monoester of the formula (I) is also disclosed in which the monoester is purified from a mixed solvent comprising a C.sub.6 -C.sub.12 aromatic hydrocarbon solvent and a C.sub.1 -C.sub.8 alcohol or C.sub.2 -C.sub.3 aliphatic nitrile solvent.