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41. 发明授权

US4151472A Selective calling circuit employing controlled power supply therefor 失效
标题翻译：选择性呼叫电路采用受控供电
公开(公告)号：US4151472A
公开(公告)日：1979-04-24
申请号：US851374
申请日：1977-11-14
申请人： Eiji Watanabe , Junichi Onozawa , Jouji Tanaka , Takazo Takahashi , Tsuneo Kitamura , Hiroshi Yamada , Hiroshi Noguchi , Yukio Ueno
发明人： Eiji Watanabe , Junichi Onozawa , Jouji Tanaka , Takazo Takahashi , Tsuneo Kitamura , Hiroshi Yamada , Hiroshi Noguchi , Yukio Ueno
IPC分类号： H04Q1/30 , G01R15/09 , G01R23/00 , G08B3/10 , H04Q7/16 , H03K17/26 , H03K5/18
CPC分类号： G01R15/09 , G01R23/005 , G08B3/1008
摘要： In a selective calling circuit including a band-pass filter which may be constituted by an active filter, and a power source for energizing the filter, a control signal is generated which has a predetermined duration in accordance with the output of the band-pass filter at a point of time whereat the output of the band-pass filter reaches a predetermined level. In response to the control signal, there is established a state in which the center frequency of the band-pass filter can be changed, and the output of the power source is changed from a first level to a second level for a period of time substantially corresponding to the predetermined duration of the control signal. At the aforementioned first level, the band-pass filter may be energized, while at the second level, it may be deenergized.
摘要翻译：在包括可由有源滤波器构成的带通滤波器和用于激励滤波器的电源的选呼电路中，产生根据带通滤波器的输出具有预定持续时间的控制信号在带通滤波器的输出达到预定电平的时间点。响应于控制信号，建立了可以改变带通滤波器的中心频率并且将电源的输出从第一电平改变到第二电平一段时间的状态对应于控制信号的预定持续时间。在上述第一级，带通滤波器可以被激励，而在第二级，它可以被断电。

42. 发明授权

US4128807A Multi-dial electric meter register 失效
标题翻译：多功能表电表
公开(公告)号：US4128807A
公开(公告)日：1978-12-05
申请号：US847470
申请日：1977-11-01
申请人： Kenneth G. Halstead , Thomas G. Willis
发明人： Kenneth G. Halstead , Thomas G. Willis
IPC分类号： G01R11/57 , G01R11/64 , G01R15/09 , G01R15/08
CPC分类号： G01R11/64 , G01R11/57 , G01R15/09
摘要： A multi-dial meter register includes two energy consumption dial gear trains and a maximum power demand gear train that are selectively coupled to the meter movement of an electric utility billing meter. Two shifting control plates produce engagements and disengagements at input gears of the gear trains. A connecting shaft extends between the control plates and provides concurrent movement and further provides a dial status indicator at one end thereof.
摘要翻译：一个多拨号计数器寄存器包括两个能量消耗拨号齿轮系和选择性地耦合到电力公用计费表的仪表运动的最大功率需求齿轮系。两个变速控制板在齿轮系的输入齿轮处产生接合和分离。连接轴在控制板之间延伸并提供同时移动，并且在其一端进一步提供拨盘状态指示器。

43. 发明授权

US3976941A Auto-ranging system for an electronic energy meter 失效
标题翻译：电子式电能表自动测距系统
公开(公告)号：US3976941A
公开(公告)日：1976-08-24
申请号：US505721
申请日：1974-09-13
申请人： Miran Milkovic
发明人： Miran Milkovic
IPC分类号： G01R22/00 , G01R15/09 , G01R21/127 , G01R21/133 , G01R7/00 , G01R7/12 , G01R11/32
CPC分类号： G01R21/133 , G01R15/09 , G01R21/127
摘要： An auto-ranging system for an electronic watt-hour meter includes a current transformer for measuring the electrical current in at least one line of an electrical power consuming system. The measured current is converted to a voltage which is proportional to the measured current by means of a current/voltage converter. A means responsive to the output of the current transformer incrementally varies the gain of the current/voltage converter inversely as the level of the measured current reaches each of a plurality of successively increasing discrete current levels. The output of the current/voltage converter is multiplied by the line voltage which is detected by a potential transformer with the output of the multiplier being coupled to an analog-to-pulse rate converter. The analog-to-pulse rate converter generates a pulse train having a pulse rate which is proportional to the product signal at the output of the multiplier. A means responsive to the output of the current transformer incrementally varies the pulse rate of the pulse train as the measured current reaches each of the successive plurality of discrete current levels so that the pulse rate varying means compensates the variance of the gain of the current-to-voltage converter. Thus, a watt-hour meter is provided which has a substantially constant gain and an exceedingly large dynamic range.
摘要翻译：用于电子电度表的自动测距系统包括用于测量电力消耗系统的至少一行中的电流的电流互感器。测量的电流通过电流/电压转换器转换成与测量电流成比例的电压。响应于电流互感器的输出的装置随着测量电流的电平达到多个连续增加的离散电流电平中的每一个而相反地逐渐改变电流/电压转换器的增益。电流/电压转换器的输出乘以由电压互感器检测的线电压，乘法器的输出耦合到模拟脉冲速率转换器。模拟脉冲速率转换器产生具有与乘法器的输出处的乘积信号成比例的脉冲速率的脉冲串。当测量的电流达到连续的多个离散电流电平中的每一个时，响应于电流互感器的输出的装置逐渐改变脉冲串的脉冲速率，使得脉冲速率变化装置补偿电流互感器的增益的方差，电压转换器。因此，提供了具有基本上恒定增益和极大动态范围的瓦特计。

44. 发明授权

US3903434A Controllable voltage divider 失效
标题翻译：可控分压器
公开(公告)号：US3903434A
公开(公告)日：1975-09-02
申请号：US46679374
申请日：1974-05-03
申请人： SIEMENS AG
发明人： RAUCHENECKER KONRAD
IPC分类号： G01R15/09 , G01R17/20 , H03G3/00 , H03H7/25 , H03K1/14
CPC分类号： H03H7/25 , G01R15/09 , G01R17/20 , H03G3/001
摘要： A controllable voltage divider utilizing transistors connected such that their collector-emitter paths are positioned in the partial voltage paths which are to be supplied to an output and wherein selected transistors can be turned on by supplying a bias voltage to their base through a high ohmic base resistor and wherein a common high ohmic emitter resistance is connected in circuit with all of the transistors such that the load on the voltage divider is maintained so small that dividing errors do not occur due to the internal resistance of the voltage source supplying the voltage which is to be divided and/or due to the tolerance of the internal resistance of the individual transistors.
摘要翻译：一种可控分压器，利用连接的晶体管，使得它们的集电极 - 发射极路径位于要提供给输出的部分电压路径中，并且其中所选择的晶体管可以通过向其基极通过高欧姆基极电阻器，并且其中公共高欧姆发射极电阻与所有晶体管连接在电路中，使得分压器上的负载保持如此小，使得由于提供电压的电压源的内部电阻而不会发生分割误差，被划分和/或由于各个晶体管的内部电阻的容限。

45. 发明授权

US3829774A Micropower autopolarity voltmeter 失效
标题翻译：麦克风自动电压表
公开(公告)号：US3829774A
公开(公告)日：1974-08-13
申请号：US25768372
申请日：1972-05-30
申请人： TRIPLETT CORP
发明人： CERVENY W
IPC分类号： G01R15/09 , G01R15/08 , G01R19/14
CPC分类号： G01R15/09
摘要： A highly sensitive circuit for an electrical instrument for causing the indicator on a meter to read linearly upscale for positive or negative DC signals, AC signals, or a combination of AC or DC signals applied to the input of the circuit. The circuit may also operate in a micropower mode with sufficiently low current drain to permit the instrument to operate continuously for a time nearly equal to the shelf life of the battery power source. In a first embodiment, the input signal to be measured is provided to an input circuit which includes a resistive divider network in circuit with a null control circuit for selecting the range of input signals. A selected proportion of the input signal is applied to the input of a field effect transistor (FET). The output from the FET is applied to the input of an amplifying transistor having its output in circuit with a bridge network. The bridge network includes a pair of oppositely poled diodes in circuit with fixed resistors so that a first diode conducts for positive signals and a second diode conducts for negative signals from the transistor. A meter is connected in circuit with the diodes and is arranged so that the indicator on a meter reads upscale whether the output of the amplifier comprises positive or negative DC signals or AC signals or a combination of both. A feedback circuit includes a resistive network in circuit with the bridge for selecting the appropriate circuit sensitivity for the function to be performed by the circuit. The output from the resistive network in the feedback path is connected to a pair of transistors connected in a Darlington configuration, the output of which is connected to the FET. The input circuit also includes a switching circuit for providing a coupling capacitor in series circuit with the input signals to block DC when AC signals are being measured, then to provide a low pass filter in circuit with the input signals when DC signals are being measured. The circuit according to the invention may be also used to measure resistance and current. In the micropower power mode, the FET and the amplifying transistor are each operated in a starved mode. The starved pair of transistors are coupled to the diode bridge network through a complementary emitter follower amplifier to drive the bridge circuit. An alternate bridge circuit comprises switches in circuit with each of the diodes in a 4-diode bridge so that when these switches open, the circuit will operate in the autopolarity mode. The closure of respective pairs of switches will cause the instrument to operate in either the positive or negative mode. In one embodiment for measuring resistance, a low power ''''ohms'''' measurement is provided by substituting a low current regulator power source for the normal battery in the probe circuit. In addition, the gain of the amplifier stages is increased. The resulting circuit enables in-circuit resistance measurements in which the voltage applied to the circuit to be tested is sufficiently low that unwanted biasing of semiconductive junctions in the test circuit is avoided. The method of using the circuit of the invention is also disclosed wherein the indicator on the meter is caused to indicate a null reading in the absence of an input signal to the circuit by adjusting the null control circuit and sensing the indicator on the meter until a null is reached. The null control circuit may also be used to provide a storage feature for the circuit.

46. 发明授权

US3536998A Automatic function selecting and scale shifting volt-ohmmeter 失效
标题翻译：自动功能选择和定标移位电位计
公开(公告)号：US3536998A
公开(公告)日：1970-10-27
申请号：US3536998D
申请日：1966-09-13
申请人： LLOYD P NORDHOLM , DOUGLAS A FLORANCE
发明人： NORDHOLM LLOYD P
IPC分类号： G01R15/09 , G01R27/02 , G01R1/38 , G01R15/12
CPC分类号： G01R15/09

47. 发明授权

US3005156A Automatic range selector 失效
标题翻译：自动量程选择器
公开(公告)号：US3005156A
公开(公告)日：1961-10-17
申请号：US56003256
申请日：1956-01-18
申请人： BERGEN LAB INC
发明人： MAX HOBERMAN
IPC分类号： G01R15/09
CPC分类号： G01R15/09

48. 发明授权

US2606943A Automatic range-shifting voltmeter 失效
标题翻译：自动换档电压表
公开(公告)号：US2606943A
公开(公告)日：1952-08-12
申请号：US72682647
申请日：1947-02-06
申请人： EASTERN IND INC
发明人： BARKER JOHN L
IPC分类号： G01R15/09
CPC分类号： G01R15/09

49. 发明申请

US20210116477A1 Corded Probe with Interface 有权
公开(公告)号：US20210116477A1
公开(公告)日：2021-04-22
申请号：US16658272
申请日：2019-10-21
申请人： Tegam, Inc.
发明人： Andrew S. Brush , Adam R. Fleder , James Newton , Anthony Schommer, III , Russell House , Sanjay Kasam
IPC分类号： G01R1/067 , G01R15/09 , G01R1/04 , G01R15/12 , G01R19/25 , G01R19/155
摘要： A probe for use with a measuring instrument. The probe is a wired probe assembly comprising a housing with an integrated user interface. The wired probe assembly further comprises a measuring component for contacting a device to be measured and a cord component connecting the measuring component to the measuring instrument. The user interface can indicate a status of an electrical parameter and allow an operator to provide inputs remotely to the measuring device.

50. 发明申请

US20210003613A1 RF Power Detector With A Variable Threshold 有权
公开(公告)号：US20210003613A1
公开(公告)日：2021-01-07
申请号：US16976666
申请日：2018-03-27
申请人： Apple Inc.
发明人： Joerg Fuhrmann , Werner Schelmbauer , Herbert Stockinger , Dieter Pimingsdorfer
IPC分类号： G01R15/09 , H03F3/19 , H03K5/24 , G01R21/01 , H04B17/10
摘要： A radio frequency (RF) power detector with a variable threshold for dynamic power detection. The RF power detector includes stacked transistors of an input stage and stacked transistors of an output stage. A DC bias voltage plus an input RF signal are applied to a control electrode on the input stage and the same DC bias voltage plus an additional DC bias voltage are applied to a control electrode on the output stage. Depending on the input power of the RF signal, a Δ current is generated in the output stage, and the output capacitor is either charged or discharged, and the output capacitor voltage is compared to a threshold to generate an output signal. The output signal may be averaged over time by two capacitors, miller capacitor and output capacitor. The output voltage of the RF power detector is an integration over time of the input RF power.

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