Adjustable instrument case
    1.
    发明授权
    Adjustable instrument case 失效
    可调式仪表箱

    公开(公告)号:US4090632A

    公开(公告)日:1978-05-23

    申请号:US759670

    申请日:1977-01-17

    CPC分类号: H05K5/0008 H05K5/04

    摘要: The present invention comprises a plastic case for housing electronic instruments and the like, having a top and bottom panel with two side panels connecting them. The edges of the top and bottom panels are mounted for telescoping movement in the side panels to enable adjustment of the case to the size of instrument housed.

    摘要翻译: 本发明包括用于容纳电子仪器等的塑料外壳,具有连接它们的两个侧板的顶板和底板。 顶部和底部面板的边缘安装成用于在侧面板中的伸缩运动,以使壳体能够根据收纳的仪器的尺寸进行调节。

    Method and apparatus for AC signal comparison, calibration and
measurement
    2.
    发明授权
    Method and apparatus for AC signal comparison, calibration and measurement 失效
    用于交流信号比较,校准和测量的方法和装置

    公开(公告)号:US4901006A

    公开(公告)日:1990-02-13

    申请号:US374607

    申请日:1989-06-29

    IPC分类号: G01R19/22

    CPC分类号: G01R19/225

    摘要: A method and apparatus for the comparision of AC signals by electrothermal means in which both signals are applied to an electrothermal converter, such as a thermocouple converter or a thermoresistive converter, and the temperature produced by the signals is converted to a difference signal. The DC component of the difference signal is used to maintain the electrothermal converter at a stable operating temperature. The AC component of the difference signal is used to indicate the difference between two signals when used as a comparator, to control the amplitude of a reference standard's output when used as a voltmeter or calibration standard, and also to control the amplitude of an oscillator when used as a calibration standard.

    摘要翻译: 一种用于通过电热装置比较AC信号的方法和装置,其中两个信号被施加到诸如热电偶转换器或热电阻转换器的电热转换器,并且由信号产生的温度被转换为差分信号。 差分信号的直流分量用于将电热转换器维持在稳定的工作温度。 当用作比较器时,差分信号的AC分量用于表示两个信号之间的差异,用于当用作电压表或校准标准时控制参考标准输出的幅度,并且还用于控制振荡器的幅度 用作校准标准。

    Adjustable instrument case
    3.
    再颁专利
    Adjustable instrument case 失效
    可调式仪表箱

    公开(公告)号:USRE32762E

    公开(公告)日:1988-10-11

    申请号:US601133

    申请日:1984-04-19

    IPC分类号: H05K5/00

    CPC分类号: H05K5/0008

    摘要: The present invention comprises a plastic case for housing electronic instruments and the like, having a top and bottom panel with two side panels connecting them. The edges of the top and bottom panels are mounted for telescoping movement in the side panels to enable adjustment of the case to the size of instrument housed.

    AC-DC transfer standard temperature sensor reversal error compensation
circuit
    4.
    发明授权
    AC-DC transfer standard temperature sensor reversal error compensation circuit 失效
    AC-DC传输标准温度传感器反向误差补偿电路

    公开(公告)号:US4659910A

    公开(公告)日:1987-04-21

    申请号:US728886

    申请日:1985-04-30

    CPC分类号: G01R17/02 H03F2200/261

    摘要: A compensation circuit for a heater wire and a temperature sensor, the temperature sensor generating a signal whose amplitude is dependent upon the amplitude of the voltage across the heater wire. The circuit comprises a comparator circuit and a priority encoder circuit for generating digital information that is a function of the amplitude of the voltage in the heater wire; a multiplexor/demultiplexor circuit, responsive to the digital information generated, for generating a reversal error compensation signal, the generated reversal error compensation signal having an amplitude that is a function of the Peltier and Thomson effects associated with the heater wire; and amplifier/chopper circuits adapted to generate a compensated sensor signal that is a function of the reversal error compensation signal and the uncompensated sensor signal. The amplitude of the compensated sensor signal is approximately that of the signal generated by the sensor in the absence of the Peltier and Thomson effects associated with the heater wire.

    摘要翻译: 用于加热器线和温度传感器的补偿电路,温度传感器产生其幅度取决于加热线两端的电压振幅的信号。 该电路包括一个比较器电路和一个优先编码器电路,用于产生作为加热线中的电压振幅的函数的数字信息; 多路复用器/解复用器电路,响应于产生的数字信息,用于产生反向误差补偿信号,所产生的反向误差补偿信号具有作为与加热器线相关联的珀尔帖和汤姆逊效应的函数的幅度; 以及适于产生作为反向误差补偿信号和未补偿传感器信号的函数的补偿传感器信号的放大器/斩波电路。 补偿的传感器信号的幅度大约是在没有与加热器线相关联的珀尔帖和汤姆森效应的情况下由传感器产生的信号的振幅。

    Resistive sensing thermal device for current measurement
    6.
    发明授权
    Resistive sensing thermal device for current measurement 失效
    用于电流测量的电阻感测热装置

    公开(公告)号:US4695793A

    公开(公告)日:1987-09-22

    申请号:US580450

    申请日:1984-02-15

    申请人: Fred L. Katzmann

    发明人: Fred L. Katzmann

    CPC分类号: G01R19/225

    摘要: A thermal transfer device for use in the measurement of alternating current comprising an evacuated enclosure containing a first electrical conductor heated by the alternating current being measured and a thermal sensor to provide an electrical signal representative of the temperature of the conductor, wherein the first electrical conductor is formed of a low temperature coefficient of resistivity material, and the thermal sensor is a second electrical conductor of a relatively high temperature coefficient of resistivity material thermally coupled with and encompassing most of the first electrical conductor.

    摘要翻译: 一种用于测量交流电的热转印装置,包括一个抽真空的外壳,该外壳包含被测量的交流电加热的第一电导体和一个热传感器,以提供代表导体温度的电信号,其中第一电导体 由电阻率材料的低温系数形成,并且热传感器是与第一电导体大部分热耦合并且包围大部分电阻率材料的相对较高温度系数的第二电导体。

    Electrothermal conversion elements, apparatus and methods for use in
comparing, calibrating and measuring electrical signals
    8.
    发明授权
    Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals 失效
    电热转换元件,用于比较,校准和测量电信号的装置和方法

    公开(公告)号:US5783805A

    公开(公告)日:1998-07-21

    申请号:US366674

    申请日:1994-12-30

    申请人: Fred L. Katzmann

    发明人: Fred L. Katzmann

    摘要: Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals utilizing a thin film heater on a thin, low mass, low thermal conductivity substrate and low mass thermoresistive or PN junction thermal radiation sensors. The element emits IR radiation in response to electrical input. The radiation is collected and converted to an electrical signal proportional to the RMS value of the input signal. Isothermal operation enhances both IR and electrical operation.

    摘要翻译: 电热转换元件,用于比较,校准和测量利用薄薄的低质量低导热衬底上的薄膜加热器和低质量热电阻或PN结热辐射传感器的电信号的电热转换元件,装置和方法。 该元件响应于电气输入发出红外辐射。 收集辐射并将其转换成与输入信号的RMS值成比例的电信号。 等温操作增强了IR和电气操作。

    Electrothermal conversion elements, apparatus and methods for use in
comparing, calibrating and measuring electrical signals
    9.
    发明授权
    Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals 失效
    电热转换元件,用于比较,校准和测量电信号的装置和方法

    公开(公告)号:US5378873A

    公开(公告)日:1995-01-03

    申请号:US894103

    申请日:1992-06-05

    申请人: Fred L. Katzmann

    发明人: Fred L. Katzmann

    IPC分类号: G01R19/03 G01R19/22 H05B1/02

    摘要: Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals. The element emits IR radiation in response to electrical input. The radiation is collected and converted to an electrical signal proportional to the RMS value of the input signal. Isothermal operation enhances both IR and electrical operation.

    摘要翻译: 电热转换元件,用于比较,校准和测量电信号的装置和方法。 该元件响应于电气输入发出红外辐射。 收集辐射并将其转换成与输入信号的RMS值成比例的电信号。 等温操作增强了IR和电气操作。