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8 条记录 (耗时 0.026 秒)

    Multimeter with current sensor
    1.
    发明授权
    Multimeter with current sensor 失效
    万用表带电流传感器

    公开(公告)号：US6043640A

    公开(公告)日：2000-03-28

    申请号：US960410

    申请日：1997-10-29

    申请人： William J. Lauby ,  Charles A. Bublitz ,  Charles R. Jensen ,  Brian S. Aikins ,  Steven W. Fisher

    发明人： William J. Lauby ,  Charles A. Bublitz ,  Charles R. Jensen ,  Brian S. Aikins ,  Steven W. Fisher

    IPC分类号： G01R1/22 ,  G01R15/12 ,  G01R27/02 ,  G01R1/00

    CPC分类号： G01R15/125

    摘要： A multimeter having an elongated housing with a fixed recess for receiving a current-carrying conductor is provided. The multimeter is adapted to measure various parameters including a.c. and d.c. voltage, resistance, and a.c. current. On one end of the elongated housing of the multimeter is a C-shaped current sensor mounted around the fixed recess for measuring a.c. current in the current-carrying conductor and on the other end is a pair of test leads for measuring resistance, a.c. voltage, and d.c. voltage. The current sensor and the test leads provide input signals to an analog-to-digital converter (ADC) to obtain digital samples which are displayed as measurement results according to the selected measurement mode.

    摘要翻译： 提供一种具有细长壳体的万用表，其具有用于接收载流导体的固定凹部。 万用表适用于测量各种参数，包括a.c. 和d.c. 电压，电阻和电流。 当前。 在万用表的细长壳体的一端是安装在固定凹槽周围的C形电流传感器，用于测量直流电流。 载流导体中的电流和另一端的电流是一对用于测量电阻的测试引线。 电压和直流 电压。 电流传感器和测试引线向模数转换器（ADC）提供输入信号，以获得根据所选测量模式显示为测量结果的数字样本。

    Molded gasket for instrument housing
    6.
    发明授权
    Molded gasket for instrument housing 失效
    用于仪器外壳的模制垫圈

    公开(公告)号：US4951834A

    公开(公告)日：1990-08-28

    申请号：US405894

    申请日：1989-09-12

    申请人： Brian S. Aikins

    发明人： Brian S. Aikins

    IPC分类号： A45C11/22 ,  G01R1/04

    CPC分类号： G01R1/04 ,  A45C11/22

    摘要： An instrument housing comprises an upper housing portion and a lower housing portion together enclosing instrumentation circuitry. An outer surface of one of the lower housing portion is formed, circumferentially, with a series of gasket locking elements. A gasket injection molded on the series of dovetail-shaped gasket locking elements forms a seal between the upper and lower housing portions. Mechanical locking between the gasket and dovetail-shaped elements retains the gaskeet in place between the housing portions so that the gasket tends not to dislodge from the instrument even if it is dropped.

    摘要翻译： 仪器壳体包括上壳体部分和下壳体部分在一起的封闭仪器电路。 下壳体部分之一的外表面周向地形成有一系列垫圈锁定元件。 注射在一系列燕尾形垫片锁定元件上的垫圈在上部和下部壳体部分之间形成密封。 垫圈和燕尾形元件之间的机械锁定将保护套保持在壳体部分之间的适当位置，使得即使垫片掉落，垫圈也不会从仪器上移开。

    Electronic instrument with EMI/ESD shielding system
    8.
    发明授权
    Electronic instrument with EMI/ESD shielding system 失效
    具有EMI / ESD屏蔽系统的电子仪器

    公开(公告)号：US5206796A

    公开(公告)日：1993-04-27

    申请号：US667432

    申请日：1991-03-11

    申请人： Bradley H. Thompson ,  Brian S. Aikins ,  Roger M. Trana

    发明人： Bradley H. Thompson ,  Brian S. Aikins ,  Roger M. Trana

    IPC分类号： H05K7/14 ,  H05K9/00

    CPC分类号： H05K9/002

    摘要： An electronic instrument is provided with a shielding system consisting of two metallic shields press fitted into plastic instrument case parts without the need for any additional parts to provide electrical and mechanical attachment. In one embodiment, a bottom shield is press fitted onto protuberances inside of a lower case part and electrically connected to a common jack base on a circuit board within the instrument by a vee spring on the bottom shield. A top shield is press fitted into a capturing region of a switch support case part and includes an extension arm and extension ring that is mechanically held by case screws and guides already required by the plastic case. In that position, the extension ring is held in electrical contact with a common pad on the circuit board, the common pad being in electrical contact with a common trace, a common area, and the common jack base.