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    • 3. 发明授权
    • Quick release rotary punch
    • 快速旋转冲头
    • US4949449A
    • 1990-08-21
    • US315335
    • 1989-02-23
    • John S. Wilson
    • John S. Wilson
    • B21D28/36B26D7/26B26F1/14
    • B26D7/2614B21D28/36B26F1/14Y10T29/4973Y10T29/49822Y10T83/4836Y10T83/9389Y10T83/9461Y10T83/9464
    • A rotary punch including a punch wheel rotatable on a central axis, the wheel having an end face lying in a radial plane of the wheel and an outer generally cylindric rim surface extending generally axially of the wheel. A plurality of radial bores in the wheel extend generally radially inwardly from the rim surface at intervals spaced circumferentially of the wheel, and a corresponding plurality of axial bores in the wheel extend generally axially inwardly from said end face of the wheel intersecting the radial bores generally at right angles. A plurality of generally cylindric punch elements are inserted in the radial bores, each punch element having a circumferential groove. A plurality of retainer pins in the axial bores may be moved axially between an extended position in which each retainer pin extends into a corresponding radial bore and is received in the circumferential groove in a respective punch element for holding the punch element in fixed radial position in its radial bore, and a retracted position in which the retainer pin is clear of the groove for enabling removal of the punch element from the radial bore. A coil spring biases each retainer pin toward its extended position. A tool is provided to pry any one of the retainer pins for moving it against the bias of the spring from its extended position to its retracted position to permit removal of a respective punch element from the wheel.
    • 一种旋转冲头,其包括可在中心轴线上旋转的打孔轮,所述轮子具有位于所述车轮的径向平面中的端面和大致圆柱形的外表面,所述轮廓表面大致沿所述车轮的轴向延伸。 轮中的多个径向孔基本上沿周向间隔地以轮缘表面径向向内延伸,并且轮中相应的多个轴向孔基本上从所述轮的与所述径向孔相交的端面轴向向内延伸, 直角 多个大致圆筒形的冲头元件插入到径向孔中,每个冲头元件具有圆周凹槽。 轴向孔中的多个保持销可以在延伸位置之间轴向移动,其中每个保持销延伸到相应的径向孔中,并且在相应的冲头元件中容纳在周向槽中,用于将冲压元件保持在固定的径向位置 其径向孔以及缩回位置,在该位置中,保持销从槽中脱离,以使冲头元件能够从径向孔中移除。 螺旋弹簧将每个固定销朝向其延伸位置偏置。 提供了一种工具,用于撬动任何一个保持销,用于将其抵抗弹簧的偏压从其延伸位置移动到其缩回位置,以允许从轮移除相应的冲头元件。
    • 4. 发明授权
    • Folded dipole antenna
    • 折叠偶极天线
    • US06317099B1
    • 2001-11-13
    • US09479489
    • 2000-01-10
    • Martin L. ZimmermanJohn S. Wilson
    • Martin L. ZimmermanJohn S. Wilson
    • H01Q926
    • H01Q19/108H01Q1/246H01Q9/26H01Q21/062
    • A folded dipole antenna for transmitting and receiving electromagnetic signals is provided. The antenna includes a ground plane and a conductor extending adjacent the ground plane and spaced therefrom by a first dielectric. The conductor includes an open-ended transmission line stub, a radiator input section, at least one radiating section integrally formed with the radiator input section, and a feed section. The radiating section includes first and second ends, a fed dipole and a passive dipole. The fed dipole is connected to the radiator input section. The passive dipole is disposed in spaced relation to the fed dipole to form a gap. The passive dipole is shorted to the fed dipole at the first and second ends.
    • 提供用于发送和接收电磁信号的折叠偶极天线。 天线包括接地平面和邻近接地平面延伸并与第一电介质隔开的导体。 导体包括开口传输线短截线,散热器输入部分,与散热器输入部分一体形成的至少一个辐射部分和馈送部分。 辐射部分包括第一端和第二端,馈电偶极和无源偶极。 馈电偶极子连接到散热器输入部分。 被动偶极子与馈送的偶极子间隔设置以形成间隙。 被动偶极子在第一端和第二端与馈电偶极短路。
    • 6. 发明授权
    • Base station antenna for dual polarization
    • 用于双极化的基站天线
    • US6072439A
    • 2000-06-06
    • US7648
    • 1998-01-15
    • Joseph R. IppolitoHenry VillegasJohn S. Wilson
    • Joseph R. IppolitoHenry VillegasJohn S. Wilson
    • H01Q1/24H01Q1/52H01Q21/08H01Q21/26
    • H01Q1/523H01Q1/246H01Q21/08H01Q21/26
    • An improved antenna system for transmitting and receiving electromagnetic signals comprising a backplane having a length and a vertical axis along the length. A plurality of dipole radiating elements project outwardly from a surface of the backplane. Each of the elements includes a balanced orthogonal pair of dipoles aligned at first and second predetermined angles with respect to the vertical axis, forming crossed dipole pairs. An unbalanced feed network extends along the backplane and connected to the radiating elements. A printed circuit board balun is attached to each of the dipoles. The antenna can also include a parasitic element positioned along the vertical axis such that primary electromagnetic fields induce currents on the parasitic element, these induced currents re-radiate secondary electromagnetic fields which cancel portions of the primary electromagnetic fields, thereby improving isolation.
    • 一种用于发送和接收电磁信号的改进的天线系统,包括沿长度具有长度和垂直轴的背板。 多个偶极辐射元件从背板的表面向外突出。 每个元件包括相对于垂直轴以第一和第二预定角度对准的平衡正交对偶极子,形成交叉偶极子对。 不平衡馈电网沿着背板延伸并连接到辐射元件。 一个印刷电路板平衡 - 不平衡转换器连接到每个偶极子。 天线还可以包括沿垂直轴定位的寄生元件,使得初级电磁场感应寄生元件上的电流,这些感应电流重新辐射抵消主电磁场部分的次级电磁场,从而改善隔离。