公开(公告)号：US06545440B2

公开(公告)日：2003-04-08

申请号：US09873907

申请日：2001-06-04

申请人： Dan Slater ,  Frank R. Mitchell

发明人： Dan Slater ,  Frank R. Mitchell

IPC分类号： G05B1910

CPC分类号： B25J9/023

摘要： A Cartesian robot comprises a base member disposed along an x-axis, a transverse member moveably mounted to the base member, and disposed along a y-axis transverse to the x-axis. The robot has a y-carriage for a measurement probe moveably mounted to the transverse member along the y-axis. The x, y, and z axes define a Cartesian coordinate system. The robot includes an innovative structure that achieves high precision with respect to the z-axis by providing a planarized and stable reference surface along the y-axis (vertical axis). The position of the y-carriage with respect to a z-axis is a predictable function of the measured position of the y-carriage on the reference surface, and rigid-body tilt of the reference surface. High accuracy and precision are achieved by utilizing a granite slab for providing the planarized reference surface disposed along the y-axis for the transverse member. The granite slab is supported by a structural frame, and a measurement probe may be mounted to a y-carriage which is moveably mounted to the reference surface of the granite slab. The Cartesian robot is especially suitable for near-field antenna-measuring scanners that require high precision, such as scanners for high-frequency antenna.

公开(公告)号：US07191531B1

公开(公告)日：2007-03-20

申请号：US10905837

申请日：2005-01-22

申请人： Frank R. Mitchell

发明人： Frank R. Mitchell

IPC分类号： B43L13/02

CPC分类号： B43L13/02

摘要： A device that can be used to place lines on structures adjacent to a corner. The device includes an L-shaped body that has two sections that intersect each other at a right angle. A chalk-depositing roller is rotatably and movably mounted on each section and deposits chalk on a surface as the device is moved. The corner of a building is accommodated adjacent to the right angle of the L-shaped body.

摘要翻译： 可用于在与角落相邻的结构上放置线的设备。 该装置包括具有两个直角相交的部分的L形本体。 白垩沉积辊可旋转和可移动地安装在每个部分上，并且当装置移动时将白垩沉积在表面上。 建筑物的角落毗邻L形体的直角。

公开(公告)号：US4665771A

公开(公告)日：1987-05-19

申请号：US660722

申请日：1984-10-15

申请人： Frank R. Mitchell

发明人： Frank R. Mitchell

IPC分类号： F16H13/08

CPC分类号： F16H13/06

摘要： A traction drive and speed changing device with a pair of aligned shafts extending out of opposite ends of a housing and in alignment. Contained within the housing is an internal race or annular bearing surface. A pair of rollers, each of lesser diameter than the race are interconnected by a first crank which maintains the rollers in frictional engagement with the race. A second crank couples the first roller to the input shaft. A third crank couples the first roller to the output shaft. A speed reduction related to the difference in diameters of the roller and the race. An annular version suitable for providing speed changes for a rotating body and to allow cables or conduits to pass through the device.

摘要翻译： 一种牵引驱动和变速装置，其具有一对对准的轴，其从壳体的相对端延伸并对齐。 外壳中包含内圈或环形轴承表面。 一对直径小于滚道的滚子通过第一曲柄相互连接，该第一曲柄保持滚子与滚道摩擦接合。 第二曲柄将第一辊连接到输入轴。 第三曲柄将第一辊连接到输出轴。 与滚子和滚道的直径差有关的减速度。 适合于为旋转体提供速度变化并允许电缆或导管穿过该装置的环形型式。

公开(公告)号：US4402482A

公开(公告)日：1983-09-06

申请号：US167744

申请日：1980-07-14

申请人： Steven K. Harbaugh ,  Frank R. Mitchell

发明人： Steven K. Harbaugh ,  Frank R. Mitchell

IPC分类号： F16M13/00 ,  G01M11/04

CPC分类号： F16M11/18 ,  F16M11/045 ,  G01M11/04

摘要： Precision traveling optical table assembly having a rigid support framework and a rigid rectangular framework. The rigid rectangular framework is supported at three locations upon the rigid support framework. The rectangular framework includes a pair of spaced parallel rails. An optical table is provided. Carriages are mounted upon the pair of rails for longitudinal movement relative to the rails. The optical table is supported at only three locations from the carriages. A drive mechanism is connected between the carriages and the rectangular framework for causing relative movement between the optical table and the rectangular framework. At least one optical element is carried by the optical table.

摘要翻译： 具有刚性支撑框架和刚性矩形框架的精密行进光学台组件。 刚性矩形框架在刚性支撑框架上的三个位置处被支撑。 矩形框架包括一对间隔开的平行轨道。 提供光学台。 车架安装在一对轨道上，用于相对于轨道纵向移动。 光学台仅在支架上的三个位置支撑。 驱动机构连接在滑架和矩形框架之间，用于引起光学平台与矩形框架之间的相对移动。 至少一个光学元件由光学台承载。

公开(公告)号：US07352876B2

公开(公告)日：2008-04-01

申请号：US10834317

申请日：2004-04-28

申请人： Steven E. Boor ,  Frank R. Mitchell

发明人： Steven E. Boor ,  Frank R. Mitchell

IPC分类号： H04R25/00

CPC分类号： H04R19/016 ,  H04R3/00 ,  H04R25/00 ,  H04R2225/49

摘要： A hybrid circuit (300) for use in a miniature microphone assembly (100) reduces power supply noise on the audio signal input (214) of an impedance buffer amplifier (200) using one or both of shielding conductors 422, 424 to reduce parasitic capacitance between signal (418) and power supply (420) conductors. A ground plane (424), an interposing conductor (422) and combinations thereof are selectively placed and coupled to either ground (232) or a low impedance signal node (216) to reduce or eliminate the undesirable parasitic capacitance.

摘要翻译： 用于微型麦克风组件（100）的混合电路（300）减少使用屏蔽导体422,424中的一个或两个的阻抗缓冲放大器（200）的音频信号输入（214）上的电源噪声，以减小寄生电容 信号（418）和电源（420）导体之间。 接地平面（424），插入导体（422）及其组合被选择性地放置并耦合到接地（232）或低阻抗信号节点（216），以减少或消除不期望的寄生电容。

公开(公告)号：US4131029A

公开(公告)日：1978-12-26

申请号：US805434

申请日：1977-06-10

申请人： Steven K. Harbaugh ,  Frank R. Mitchell

发明人： Steven K. Harbaugh ,  Frank R. Mitchell

IPC分类号： F16H25/20 ,  B23Q5/40 ,  F16D3/48 ,  F16H25/24 ,  F16H27/02

CPC分类号： F16H25/24 ,  B23Q5/408 ,  F16H2025/2445 ,  Y10T74/1868

摘要： Gimballed coupling for use with a lead screw and nut assembly having a housing with the nut mounted in the housing and the nut threadedly engaging the lead screw. A transfer plate is provided. A thrust bearing assembly is carried by the transfer plate. First and second bearing members are provided which are disposed between the nut and the thrust bearing assembly. The first bearing member engages the housing and the second bearing member engages the thrust bearing. The first and second bearing members have cooperative spherical surfaces to permit the pivotal movement of the nut with respect to the transfer plate. Means is carried by the transfer plate and the housing for yieldably urging the housing towards the transfer plate. Additional means is provided for preventing rotation of the housing with respect to the transfer plate.

摘要翻译： 用于与螺钉和螺母组件一起使用的金属联接件，其具有壳体，其中螺母安装在壳体中，螺母螺纹地接合导螺杆。 提供转印板。 推力轴承组件由转印板承载。 第一和第二轴承构件设置在螺母和推力轴承组件之间。 第一轴承构件接合壳体，第二轴承构件接合止推轴承。 第一和第二轴承构件具有协调的球面，以允许螺母相对于转印板的枢转运动。 装置由传送板和壳体承载，用于可靠地将壳体推向转印板。 提供了用于防止壳体相对于转印板旋转的附加装置。