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    Meter and method of calibration
    31.
    发明授权
    Meter and method of calibration 失效
    计量和校准方法

    公开(公告)号：US3757217A

    公开(公告)日：1973-09-04

    申请号：US3757217D

    申请日：1971-08-20

    Applicant: WESTON INSTRUMENTS INC

    Inventor： PEARSON D

    IPC: G01R1/28 ,  G01R5/04 ,  G01R11/02 ,  G01R1/00 ,  G01R35/00

    CPC classification number: G01R5/04 ,  G01R1/28 ,  G01R11/02

    Abstract: A D''Arsonval type moving coil meter with linear scale deflection characteristics. The magnetic circuit of the meter is such that the sum total of flux which cuts the coil is the same for any operative position of the coil. Correspondingly, angular deflection of the coil is in direct proportion to the current in the coil. The magnetic circuit includes a magnet having fixed locating surfaces thereon which cooperate with fixed locating surfaces on a yoke. This locating arrangement assures that the sum total of flux which cuts the coil is the same for any operative position of the coil and further assures repeatable accuracy in successively assembled meters. The meter is calibrated by magnetizing the magnet to obtain full scale deflection when rated current is applied to the meter terminals. Where a calibrating resistor is used, the resistor is connected to the meter prior to calibration with the result that accuracy of the meter is assured without the need for using a precision resistor.

    Multimeter battery and display function test apparatus
    32.
    发明授权
    Multimeter battery and display function test apparatus 失效
    多功能电池和显示功能测试装置

    公开(公告)号：US3743939A

    公开(公告)日：1973-07-03

    申请号：US3743939D

    申请日：1972-05-01

    Applicant: WESTON INSTRUMENTS INC

    Inventor： MUNT I

    IPC: G01R15/12 ,  G01R19/255 ,  G01R35/00 ,  H03M1/00

    CPC classification number: G01R19/255 ,  G01R15/125 ,  G01R35/00 ,  H03M1/52

    Abstract: An apparatus for use with a multimeter of the digital display type wherein battery voltage and the various logic components of the meter can be tested. In a meter of the type having a dual slope integrating converter ther is provided a switch for connecting the battery terminal voltage to the input of the integrator and for utilizing the reference current switching interval to establish a test portion of the measurement cycle. The reference current interval establishes a signal for a test logic package which produces signals to transfer count information directly to the display element while the count is being accumulated; to activate display complement circuitry to illuminate all segments of the display means; and to alter the scan rate illuminating those display to brighten the display during test, keeping the duty cycle thereof at a minimum level for conserving battery voltage when not on test. Using the reference voltage portion of the test cycle, the display is caused to flicker, advantageously at a one-quarter cycle rate, and all segments are caused to be illuminated during some portion of the cycle, thereby providing a simple visual check of the various logic components of the system, all display elements, and a relatively static display of the battery voltage with a single switch position. Very little additional circuitry is needed to perform all of these functions.

    Abstract translation: 一种用于数字显示类型的万用表的装置，其中可以测试电池电压和仪表的各种逻辑组件。 在具有双斜率积分转换器的类型的仪表中，提供了用于将电池端子电压连接到积分器的输入并且利用参考电流切换间隔来建立测量周期的测试部分的开关。 参考电流间隔建立用于测试逻辑封装的信号，其产生信号以在计数被累积时将计数信息直接传送到显示元件; 激活显示器补码电路以照亮显示装置的所有段; 并且在测试期间改变照亮这些显示器以使显示器变亮的扫描速率，将其占空比保持在最小水平，以便在不测试时节省电池电压。 使用测试周期的参考电压部分，使显示器有利地以四分之一周期的速率闪烁，并且使所有段在周期的某些部分被照亮，从而提供各种各样的视觉检查 系统的逻辑组件，所有显示元件以及具有单个开关位置的电池电压的相对静态显示。 需要很少的附加电路来执行所有这些功能。

    Light sensing device having a polyhedral reflector and a photomultiplier with segmented photocathode
    33.
    发明授权
    Light sensing device having a polyhedral reflector and a photomultiplier with segmented photocathode 失效
    具有聚合反射镜的光感器件和带有分光光刻胶的光电传感器

    公开(公告)号：US3654475A

    公开(公告)日：1972-04-04

    申请号：US3654475D

    申请日：1970-02-16

    Applicant: WESTON INSTRUMENTS INC

    Inventor： MONTPAS HENRI L

    IPC: G01S3/783 ,  H01J40/02 ,  G01J1/20 ,  H01J39/12

    CPC classification number: H01J40/02 ,  G01S3/783

    Abstract: An illustrative embodiment of the invention combines a light position sensitive photoelectric device with a light beam splitting structure in order to indicate the position of the light source relative to the device''s photocathode. Primary reflecting surfaces are used to split the incoming beam of light and thereby provide improved light transmission properties.

    Abstract translation: 本发明的说明性实施例将光位敏感光电装置与光分束结构组合，以指示光源相对于装置的光电阴极的位置。 主反射表面用于分离入射光束，从而提供改善的透光性。

    Electrical connector device
    34.
    发明授权
    Electrical connector device 失效
    电气连接器装置

    公开(公告)号：US3629808A

    公开(公告)日：1971-12-21

    申请号：US3629808D

    申请日：1969-10-24

    Applicant: WESTON INSTRUMENTS INC

    Inventor： ANDREAGGI JOSEPH R ,  ZENUCH GEORGE

    IPC: H01H85/62 ,  H01R13/68 ,  H01R9/04 ,  H01R13/08

    CPC classification number: H01R13/68 ,  H01H85/62

    Abstract: An electrical connector includes a cylindrical housing member having one end portion adapted to receive a fuse member and the other end portion fitted with a connector plug or jack. The end carrying the plug or jack is further provided with a key opening adapted to receive a mating tool key for assembly of the housing member into a panel-mounted receiving member portion of the connector.

    Compact moving coil meter movement
    35.
    发明授权
    Compact moving coil meter movement 失效
    紧凑的移动线圈表运动

    公开(公告)号：US3621393A

    公开(公告)日：1971-11-16

    申请号：US3621393D

    申请日：1969-05-29

    Applicant: WESTON INSTRUMENTS INC

    Inventor： PIGNOLET LOUIS W

    IPC: G01R5/04 ,  G01R1/16 ,  G01R1/20

    CPC classification number: G01R5/04

    Abstract: Meter movement having a single U-shaped plate with an arcuate permanent magnet secured to one surface thereof. An inward extension of the plate forms one pivotal support for a moving coil and pointer assembly. The coil surrounds the magnet and the portion of the plate adjacent the magnet and is freely movable transversely of the magnet as the moving coil assembly rotates. The second pivotal support and the remainder of the magnetic circuit is provided by a second plate which is mounted in parallel spaced relationship to the first plate, the magnet being between the two plates. The second plate is spaced from the magnet to allow clearance for one leg of the coil.

    Apparatus for eliminating flicker in a driven display
    36.
    发明授权
    Apparatus for eliminating flicker in a driven display 失效
    在驱动显示屏中消除闪光灯的装置

    公开(公告)号：US3604902A

    公开(公告)日：1971-09-14

    申请号：US3604902D

    申请日：1969-04-04

    Applicant: WESTON INSTRUMENTS INC

    Inventor： MUNT IRWIN

    IPC: H03M1/00 ,  H03K21/18 ,  G09F9/00

    CPC classification number: H03M1/50

    Abstract: The state of a display-controlling (or driving) binary counter is synchronized to the state of the display controlled thereby. A time-varying signal alternately extinguishes and excites (strobes) the display and the phase of this signal is used to control the operation of the counter such that the counter does not change state significantly until the display is extinguished. The counter state is controlled by the state of a resistorcapacitor (RC) monostable multivibrator, which in turn, is synchronized while in an unstable state to the time-varying signal. Synchronization is conveniently effected by utilizing the capacitor of the multivibrator to integrate the time-varying signal and using the resulting integrated signal to trigger the monostable into a stable state.

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