公开(公告)号：US4581935A

公开(公告)日：1986-04-15

申请号：US686842

申请日：1984-12-27

申请人： Mack A. Breazeale

发明人： Mack A. Breazeale

IPC分类号： G01N29/12 ,  G01N29/34 ,  G01N33/36 ,  G01N29/00

CPC分类号： G01N29/12 ,  G01N29/348 ,  G01N33/362 ,  G01N2291/2626

摘要： The specification discloses a method for grading fibers in which a tone burst of sound having a known spatial frequency distribution is transmitted along a sound path through a sample of fibers. After the sound waves have passed through the sample, they are detected, and the detected sound waves are analyzed to determine their spatial frequency distribution which is indicative of the grade of the sample of fibers.

摘要翻译： 该说明书公开了一种用于对纤维进行分级的方法，其中具有已知空间频率分布的声音的声音脉冲沿着通过纤维样本的声音路径传输。 在声波通过样本之后，检测它们，并且分析检测到的声波以确定它们的空间频率分布，其指示纤维样本的等级。

公开(公告)号：US4310906A

公开(公告)日：1982-01-12

申请号：US106136

申请日：1979-12-21

申请人： John H. Cantrell, Jr. ,  Joseph S. Heyman ,  William T. Yost ,  Michael A. Torbett ,  Mack A. Breazeale

发明人： John H. Cantrell, Jr. ,  Joseph S. Heyman ,  William T. Yost ,  Michael A. Torbett ,  Mack A. Breazeale

IPC分类号： G01S1/72 ,  H04R19/00

CPC分类号： G01S1/72

摘要： A broadband megahertz range electrostatic acoustic transducer for use in a liquid environment. A liquid-tight enclosure 11 which includes a metallic conducting membrane 18 as part of its outside surface has a means 19 inside the liquid-tight enclosure for applying a tension to the membrane and for mounting an electrode 23 such that the flat end of the electrode is approximately parallel to the membrane. The invention includes structure and a method for ensuring that the membrane 18 and the flat end of the electrode 23 are exactly parallel and a fixed predetermined distance from each other.

摘要翻译： 用于液体环境的宽带兆赫范围静音换能器。 包括作为其外表面的一部分的金属导电膜18的液密封壳体11具有在液密封壳体内部的装置19，用于向膜施加张力并用于安装电极23，使得电极的平坦端 大致平行于膜。 本发明包括用于确保膜18和电极23的平坦端精确平行并且彼此具有固定的预定距离的结构和方法。