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    • 102. 发明授权
    • Variable-directivity microphone device
    • 可变方向性麦克风装置
    • US4308425A
    • 1981-12-29
    • US142845
    • 1980-04-22
    • Chikahide MomoseAtushi YumotoNaotaka MiyajiHiroshi OgawaIsami Nomoto
    • Chikahide MomoseAtushi YumotoNaotaka MiyajiHiroshi OgawaIsami Nomoto
    • H04N5/225G11B31/00H04R1/40H04R3/00
    • H04R1/406H04R3/005
    • A variable-directivity microphone device comprises at least three microphones. First and second microphones spaced apart by specific distances and facing in the same direction and a third microphone facing in the opposite direction. A directivity varying control capable of undergoing displacement between at least three positions, a first mixer operating, while the control is between a first and a second position, to mix, in accordance with the position thereof, the third microphone signal with the first microphone signal and, while the control is between the second and third positions, to cause the third microphone output signal to be zero, and a second mixer operating, while the control is between the second and third positions, to mix the first and second microphone output signals with varied mixing quantity and, while the control is between the first and second positions, to cause the output signal of the second microphone to be zero. The directivity obtained from the first and third microphone output signals mixed through the first mixer in accordance with the displacement of the control between the first and second positions being varied between a state of non-directivity and a primary sound-pressure gradient unidirectivity. The directivity obtained from the output signals of the first and second microphones mixed through the second mixer in accordance with the displacement of the control between the second and third positions being varied between a primary sound-pressure gradient unidirectivity and a multiple-order sound-pressure gradient unidirectivity.
    • 可变方向性麦克风装置包括至少三个麦克风。 第一和第二麦克风以特定距离间隔开并面向相同方向,第三麦克风面向相反方向。 一种能够在至少三个位置之间进行位移的方向性变化控制,第一混合器在控制在第一和第二位置之间进行操作,以根据其位置将第三麦克风信号与第一麦克风信号 并且当所述控制在所述第二和第三位置之间时,为了使所述第三麦克风输出信号为零,并且当所述控制在所述第二和第三位置之间时,所述第二混频器操作以混合所述第一和第二麦克风输出信号 具有不同的混合量,并且当控制在第一和第二位置之间时,使第二麦克风的输出信号为零。 根据第一和第二位置之间的控制的位移,通过第一混合器混合的第一和第三麦克风输出信号获得的方向性在非方向性状态和主要声压梯度单向之间变化。 根据第二和第三位置之间的控制的位移,通过第二混合器混合的第一和第二麦克风的输出信号获得的方向性在主声压梯度单向和多次声压之间变化 梯度单向性。
    • 106. 发明授权
    • Three-port lumped-element circulator comprising bypass conductors
    • 包括旁路导体的三端口集总元件循环器
    • US4174506A
    • 1979-11-13
    • US862833
    • 1977-12-21
    • Hiroshi Ogawa
    • Hiroshi Ogawa
    • H01P1/383H01P1/387H01P1/38
    • H01P1/387
    • An assembly of lumped-element conductors of a three-port circulator comprises those three first conductors connected to one another and to the ports and those three second conductors connected to the respective points of connection between the first conductors which are arranged on a principal surface of at least one magnetically stationarily biased ferrimagnetic piece so as to have a threefold axis of rotational symmetry passing perpendicularly of the principal surface through a point predetermined on the surface with the second conductors extended on the predetermined point and within an area enclosed with the first conductors. Preferably the area enclosed with the first conductors is an equilateral triangle. The second conductors are either connected between the apices of the triangle with the center of gravity or extended along the median lines. A conductor plate to which the ports are connected through capacitors and a dielectric plate are interposed between the other principal surface of the ferrimagnetic piece and a ground conductor. Alternatively, a common area of the second conductors that is situated on the predetermined point is electrically connected through the ferrimagnetic piece to the ground conductor that is placed directly on the other principal surface and connected to the respective ports through capacitors. A control circuit may be connected between the ground conductor and ground.
    • 三端口循环器的集总元件导体的组件包括彼此连接并连接到端口的三个第一导体,并且连接到第一导体之间的各个连接点的三个第二导体被布置在第一导体的主表面上 至少一个磁性固定偏压的亚铁磁片,以便具有通过垂直于主表面的预定在表面上的点的旋转对称的三重轴线,其中第二导体在预定点上延伸并且在由第一导体包围的区域内。 优选地,与第一导体包围的区域是等边三角形。 第二导体或者连接在三角形顶点与重心之间或沿着中线延伸。 端子通过电容器和电介质板连接的导体板插入在铁磁体的另一个主表面和接地导体之间。 或者,位于预定点上的第二导体的公共区域通过铁氧体片电连接到直接放置在另一主表面上的接地导体,并通过电容器连接到各个端口。 控制电路可以连接在接地导体和接地之间。
    • 109. 发明授权
    • Heavy duty pneumatic radial tire
    • 重型充气子午线轮胎
    • US4122879A
    • 1978-10-31
    • US777875
    • 1977-03-15
    • Hiroyoshi TakigawaShigeo WatanabeShigeta AokiHiroshi Ogawa
    • Hiroyoshi TakigawaShigeo WatanabeShigeta AokiHiroshi Ogawa
    • B60C11/00B60C11/01B60C11/04B60C11/11
    • B60C11/0083B60C11/00B60C11/01B60C11/0306B60C11/11B60C2011/013Y10S152/902
    • A heavy duty pneumatic radial tire having tread patterns divided into a central zone and peripheral zones by two main continuous zigzag grooves spaced apart a distance 25-38% of the overall width of the tread and having a main groove oblique or zigzag angle of 55-78.degree. relative to a radial plane of the tire. Each of the peripheral zones is divided into the form of arrow feathers by traverse grooves having walls tilted through at least 20% of the depth of the traverse groove at an angle within 20-40.degree. to a center line of the traverse groove. The ratio of total areas of the central zone to those of one of the peripheral zones is 1:1.0 to 1:1.5, and the ratio of the total areas of inner and outer peripheral blocks in the peripheral zones divided by a continuous zigzag groove substantially parallel with the main grooves is 1:1.5 to 1:2.5, thereby greatly mitigating ununiform wear at the shoulders of the tread, heal-and-tow wear between front and rear edges of blocks defined by the grooves in the pattern, and railway wear at the edges of the blocks in opposition to the grooves.
    • 一种重型充气子午线轮胎,其具有通过两个主要的连续曲折槽划分为中心区域和外围区域的胎面花纹,所述两个主要连续的锯齿形沟槽间隔开胎面的整个宽度的25-38%的距离,并且具有55°的主槽斜面或之字形角度, 78°相对于轮胎的径向平面。 每个周边区域通过横向槽被划分为箭头形状,该横向槽具有相对于横动槽的中心线以20-40°的角度倾斜至横向槽深度的至少20%的壁。 中心区域的总面积与一个外围区域的总面积的比率为1:1.0:1:1.5,并且周边区域中的外周边区块和外周边区域的总面积除以基本上连续的之字形槽的比例 与主槽平行的是1:1.5至1:2.5,从而大大减轻了胎面肩部不均匀的磨损,图案凹槽限定的砖块的前后边缘之间的磨损和磨损,以及铁路磨损 在块的与凹槽相对的边缘处。