公开(公告)号：US3983515A

公开(公告)日：1976-09-28

申请号：US513701

申请日：1974-10-10

申请人： Richard Frank Mitchell ,  Eileen Read ,  Richard Stevens

发明人： Richard Frank Mitchell ,  Eileen Read ,  Richard Stevens

IPC分类号： H03H3/08 ,  H03H9/02 ,  H03H9/25 ,  H03H9/26 ,  H01L41/18 ,  H03H9/30 ,  H03H9/32

CPC分类号： H03H9/02543 ,  H03H3/08 ,  H03H9/02622 ,  H03H9/02866 ,  Y10T29/42

摘要： An acoustic surface wave device comprising a monocrystalline body of piezoelectric material having a launching and receiving transducer applied to a planar ASW propagation surface. The piezoelectric material and the orientation of the propagation surface and the axial propagation direction relative to the crystal axes are selected to provide zero piezoelectric coupling between the transducers and a longitudinal axial bulk wave and that one of the two shear axial bulk waves that has substantially no component of particle motion perpendicular to said propagation surface. A method of manufacturing the aforesaid ASW device is also disclosed.

摘要翻译： 一种声表面波装置，包括压电材料的单晶体，其具有施加到平面ASW传播表面的发射和接收换能器。 选择压电材料和相对于晶轴的传播表面和轴向传播方向的取向，以提供换能器之间的零压电耦合和纵向轴向体波，以及基本上不存在的两个剪切轴向体波之一 颗粒运动的分量垂直于所述传播表面。 还公开了制造上述ASW装置的方法。

公开(公告)号：US06203150B1

公开(公告)日：2001-03-20

申请号：US09284342

申请日：1999-04-08

申请人： Jerzy Marcin Zaba ,  William Anthony Denne ,  Richard Frank Mitchell

发明人： Jerzy Marcin Zaba ,  William Anthony Denne ,  Richard Frank Mitchell

IPC分类号： B41J2185

CPC分类号： B41J2/185 ,  B41J2002/1853

摘要： A liquid collection apparatus comprises a liquid collecting device and liquid conduit for transferring liquid from the liquid collection device. Porous liquid absorption device is positioned between the liquid collection device and the liquid conduit. Pump device pumps liquid from the liquid conduit, the pump device generating a pressure in the conduit that is sufficient to draw liquid through the liquid collection device but is insufficient to draw a gas/liquid surface through the liquid absorption device.

摘要翻译： 液体收集装置包括液体收集装置和用于从液体收集装置输送液体的液体导管。 多孔液体吸收装置位于液体收集装置和液体导管之间。 泵装置从液体管道泵送液体，泵装置在导管中产生足以将液体通过液体收集装置的压力，但不足以通过液体吸收装置吸取气体/液体表面。

公开(公告)号：US3956647A

公开(公告)日：1976-05-11

申请号：US514472

申请日：1974-10-15

申请人： Richard Frank Mitchell ,  Eileen Read ,  Richard Stevens

发明人： Richard Frank Mitchell ,  Eileen Read ,  Richard Stevens

IPC分类号： H03H9/25 ,  H03H3/08 ,  H03H9/00 ,  H03H9/02 ,  H03H9/30 ,  H01L41/04

CPC分类号： H03H9/30 ,  H03H9/02543 ,  H03H9/02622 ,  H03H9/02866

摘要： An acoustic surface wave filter comprising a monocrystalline wafer of bismuth silicon oxide having a special orientation of the ASW propagation surface and the interdigital transducers relative to the crystal plane whereby pick-up of undesired bulk waves is reduced.

摘要翻译： 声表面波滤波器包括具有ASW传播表面的特殊取向的氧化铋单晶晶片和相对于晶体平面的叉指换能器，从而减少了不想要的体波的拾取。

公开(公告)号：US3968461A

公开(公告)日：1976-07-06

申请号：US502506

申请日：1974-09-03

申请人： Richard Frank Mitchell ,  David William Parker ,  Bernard David Rapson

发明人： Richard Frank Mitchell ,  David William Parker ,  Bernard David Rapson

IPC分类号： H03H3/08 ,  H03H9/145 ,  H03H9/64 ,  H03H9/20 ,  H03H9/32

CPC分类号： H03H9/1452 ,  H03H9/14552

摘要： A surface wave TV I.F. filter has a transducer with two passbands. Each is unsymmetrical with respect to itself and a mirror image of the other. A second transducer suppresses one of the passbands.

摘要翻译： 表面波电视 滤波器具有带有两个通带的换能器。 每个都是相对于自身而言是不对称的，另一个是镜像。 第二个传感器抑制一个通带。

公开(公告)号：US3955159A

公开(公告)日：1976-05-04

申请号：US505655

申请日：1974-09-13

申请人： Richard Frank Mitchell ,  Richard Stevens

发明人： Richard Frank Mitchell ,  Richard Stevens

IPC分类号： H03H3/08 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64 ,  H03H7/38

CPC分类号： H03H9/14547 ,  H03H9/02842 ,  H03H9/14564

摘要： An acoustic surface wave device comprises a launching transducer and a receiving transducer coupled to one surface of a piezoelectric substrate and including means for suppressing spurious signals developed in the receiving transducer due to acoustic surface waves reflected from the ends of the substrate. In one embodiment the electrodes of both transducers are staggered a quarter wavelength at the mid point of their apertures so that waves received direct from the launching transducer arrive in phase at the receiving transducer whereas end reflected waves arrive in antiphase over the two halves of the receiving transducer aperture.

摘要翻译： 声表面波装置包括耦合到压电基板的一个表面的发射换能器和接收换能器，并且包括用于抑制由于从基板的端部反射的声表面波而在接收换能器中产生的寄生信号的装置。 在一个实施例中，两个换能器的电极在它们的孔的中点处交错四分之一波长，使得直接从发射传感器接收的波同相到达接收换能器，而末端反射波在反接收器的两个半部处抵达 传感器孔径。