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公开(公告)号：US3660680A
公开(公告)日：1972-05-02
申请号：US3660680D
申请日：1970-09-23
发明人： GRUNDY REED H
IPC分类号： H03K19/007 , H03K5/18
CPC分类号： H03K19/007
摘要： This invention relates to a fail-safe duty cycle checking circuit comprising an amplifier circuit having a first input for receiving a square wave of fixed peak to peak amplitude and a second input for receiving a signal proportional to the duty cycle of the square wave, and an output, a feedback loop connected between the output and first input for providing an upper and a lower hysteresis level which levels shift upward or downward in accordance with the duty cycle of the square wave, the shifting of the hysteresis levels too far upward or too far downward rendering the amplifying circuit incapable of producing an output, and a photosensitive device having a radiant energy source connected in the feedback loop for monitoring its condition. The photosensitive device also has a photopositive resistive element connected to the first and second inputs of the amplifier circuit to assume a high impedance condition whenever the radiant energy source emits no radiant energy thereby rendering any square wave input incapable of producing an output from the amplifying circuit.
摘要翻译： 本发明涉及一种故障安全占空比检查电路，包括一个放大器电路，该放大器电路具有用于接收固定的峰峰值幅度的方波的第一输入端和用于接收与方波占空比成正比的信号的第二输入端，以及 输出端，连接在输出端和第一输入端之间的反馈回路，用于根据方波的占空比提供上下电平的上下磁滞电平，滞后电平向上或向上偏移 使得放大电路不能产生输出，并且具有连接在反馈回路中的辐射能源的感光装置用于监视其状态。 光敏装置还具有连接到放大器电路的第一和第二输入的光电阻元件，以便每当辐射能源不发射辐射能时呈现高阻抗状态，从而使得不能从放大电路产生输出的任何方波输入 。
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2.发明授权
公开(公告)号：US3868548A
公开(公告)日：1975-02-25
申请号：US43568974
申请日：1974-01-23
发明人： GRUNDY REED H
CPC分类号： G01P3/4802 , G01P1/103 , H02P23/16
摘要： This invention relates to a vital type of vehicle overspeed circuit arrangement for receiving variable frequency signals from a speed sensing device. The variable frequency signals are applied to a single break passive low-pass filter which attenuates the signals at a rate of 6db per octave. The attenuated signals are fed to an input amplifier which couples the amplified filtered signals to a selection network. The selection network includes a plurality of active switching stages a select one of which is activated for controlling the gain of a variable gain amplifier. The variable gain amplifier is coupled to an output amplifier which produces an output voltage having a value which is proportional to the frequency of the signals and the gain of the variable gain amplifier.
摘要翻译： 本发明涉及用于从速度感测装置接收可变频率信号的重要类型的车辆超速电路装置。 可变频率信号被施加到单中断无源低通滤波器，其以每个八度的6db的速率衰减信号。 衰减的信号被馈送到输入放大器，其将放大的滤波信号耦合到选择网络。 选择网络包括多个有源开关级，其中选择一个被激活以控制可变增益放大器的增益。 可变增益放大器耦合到输出放大器，其产生具有与信号的频率成比例的值和可变增益放大器的增益的输出电压。
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公开(公告)号：US3890577A
公开(公告)日：1975-06-17
申请号：US38837273
申请日：1973-08-15
发明人： GRUNDY REED H
CPC分类号： H03H11/1213 , B61L3/00 , G01P1/103 , G01P3/4802
摘要： This invention relates to a fail-safe variable type of low-pass filtering circuit. The filtering circuit includes a passive R-C network and an active semiconductive amplifying stage. The upper transmission frequency of a.c. input signals is varied by changing the resistance of the R-C network.
摘要翻译： 本发明涉及一种故障安全可变型低通滤波电路。 滤波电路包括无源R-C网络和有源半导体放大级。 交流的上传输频率 通过改变R-C网络的电阻来改变输入信号。
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公开(公告)号：US3883815A
公开(公告)日：1975-05-13
申请号：US38837073
申请日：1973-08-15
发明人： GRUNDY REED H
摘要： This invention relates to a vital type of selectable active lowpass filtering circuit. The selectable low-pass filtering circuit includes a half section resistance-capacitance filter network and a variable gain transistor amplifier. The input of the transistor amplifier is coupled to the half section resistance-capacitance filter network and the output of the transistor amplifier is selectively coupled to one of a plurality of load resistors each of which establishes a different gain for the transistor amplifier.
摘要翻译： 本发明涉及一种重要类型的可选择的有源低通滤波电路。 可选择的低通滤波电路包括半截面电阻电容滤波器网络和可变增益晶体管放大器。 晶体管放大器的输入耦合到半截面电阻电容滤波器网络，并且晶体管放大器的输出选择性地耦合到多个负载电阻中的一个，每个负载电阻为晶体管放大器建立不同的增益。
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公开(公告)号：US3651765A
公开(公告)日：1972-03-28
申请号：US3651765D
申请日：1970-04-14
发明人： GRUNDY REED H
CPC分类号： G08C19/22
摘要： An asymetrical, astable multivibrator, at the control location for a multiple unit train, transmits a control signal having a selected duty cycle characteristic over a single train line channel. The duty cycle percentage is selectively varied by a transistorized switching bank which connects different resistors into the RC timing circuit for one-half of the multivibrator element, the other half having a fixed timing circuit. These switching transistors are selectively controlled by the train operator in accordance with the desired train operating mode. The transmitted control signal is received on each car and converted into an average voltage whose level varies with percent duty cycle. On each car, this average voltage is compared, in a transistorized comparator element, with a reference voltage preset in accordance with the desired operating mode of that car within the overall train operation. When the average voltage is less than the reference voltage, a controller on that car is actuated to control the car function. With different reference voltages preset on the several cars, sequential activation of the car control functions may be obtained.
摘要翻译： 在多单元列车的控制位置处的不对称的，不稳定的多谐振荡器在单个列车线路信道上发送具有选择的占空比特性的控制信号。 占空比百分比由晶体管开关组选择性地改变，该开关组将不同的电阻器连接到多谐振荡器元件的一半的RC定时电路中，另一半具有固定的定时电路。 这些开关晶体管根据期望的列车运行模式由列车操作者选择性地控制。 发送的控制信号在每个轿厢上接收并转换成其电平随占空比百分比变化的平均电压。 在每个轿厢上，在晶体管比较器元件中，将该平均电压与在整个列车运行中根据该轿厢的期望操作模式预设的参考电压进行比较。 当平均电压小于参考电压时，该轿厢上的控制器被致动以控制汽车功能。 通过在几辆车上预设不同的参考电压，可以获得轿厢控制功能的顺序启动。
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公开(公告)号：US3638115A
公开(公告)日：1972-01-25
申请号：US3638115D
申请日：1969-11-25
发明人： GRUNDY REED H
CPC分类号： G01R23/09
摘要： This disclosure relates to a rate parameter indicator which uniquely allows extremely accurate measuring and indicating of a rate parameter at low rates due to provision of a smooth linear signal to an indication meter circuit. The system incorporates a low-voltage drift switching circuit which is coupled to a constant reference voltage source and receptive to constant-width pulses, the frequency of which is proportional to a rate parameter. A meter jitter minimizing circuit is electrically coupled to the low-voltage drift switching circuitry, as well as the constant voltage source, and includes an averaging circuit which allows the meter jitter minimizing means to provide the aforementioned smooth linear signal to the indication meter circuit in a unique manner.
摘要翻译： 本公开涉及一种速率参数指示符，其特征在于，由于向指示仪表电路提供平滑的线性信号，所以速率参数指示器能够以极低的速率唯一地允许非常精确地测量和指示速率参数。 该系统结合了一个低电压漂移开关电路，该电路耦合到恒定的参考电压源并接收恒定宽度的脉冲，其频率与速率参数成比例。 电流抖动最小化电路电耦合到低电压漂移开关电路以及恒定电压源，并且包括平均电路，其允许电表抖动最小化装置将前述的平滑线性信号提供给指示仪表电路 独特的方式。
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公开(公告)号：US3603876A
公开(公告)日：1971-09-07
申请号：US3603876D
申请日：1969-11-25
发明人： GRUNDY REED H
CPC分类号： G01P3/4802
摘要： This disclosure relates to a high rate parameter measuring system which uniquely allows extremely accurate rate measuring due to removal of indication nonlinearity as well as the removal of inaccuracies due to reading over wide ranges of ambient temperatures which are intrinsic to the environment of said system. The system incorporates pulse-squaring circuitry which square incoming rate pulses indicative of said rate parameter, associatively coupled to monostable circuitry including an operational amplifier which monostable circuitry provides a constant pulse-width output, said pulse-width output, said monostable circuitry output electrically coupled to a metering circuit which produces a linear indication of the rate of said incoming rate pulses and includes a solid state semiconductive component which uniquely cooperates with the aforementioned components to provide the desired results.
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公开(公告)号：US3559064A
公开(公告)日：1971-01-26
申请号：US3559064D
申请日：1968-04-25
发明人： GRUNDY REED H
摘要： THIS INVENTION RELATES TO A PULSE GENERATOR FOR PRODUCING ELECTRICAL PULSES WHERE A ROTOR, POSSESSING FLUX DISTRIBUTION QUALITIES SUCH THAT THERE EXISTS AT LEAST ONE REGION OF HIGH FLUX DENSITY SOURROUNDED BY REGIONS OF LOW FLUX DENSITY WHEN IN THE PRESENCE OF A MAGNETIC FIELD, IS ROTATED IN THE VICINITY OF AN INDUCTOR MEANS. THE ROTOR INCLUDES AT LEAST ONE MAGNETIC MEANS WHICH DEFINES ONE OF THE REGIONS OF HIGH FLUX DENSITY. THE INDUCTOR MEANS HAS INPUT AN OUTPUT TERMINALS. A SIGNAL IS IMPRESSED ON THE INPUT TERMINALS. UPON ROTOR ROTATION, ELECTRICAL PULSES APPEAR AT THE OUTPUT TERMINALS OF THE INDUCTOR MEANS. AN OUTPUT SIGNAL FOR ANY ROTATIONAL SPEED IS ATTAINED WHEN THE INDUCTOR MEANS IS A SATURABLE INDUCTOR. THE PULSE GENERATOR IS EXTREMELY COMPACT, SIMPLE IN MECHANICAL LAYOUT, AND HAS HIGH RESOLUTION PROPERTIES.
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公开(公告)号：US3889201A
公开(公告)日：1975-06-10
申请号：US38837873
申请日：1973-08-15
发明人： GRUNDY REED H
CPC分类号： G05F1/14
摘要： A vital electronic circuit arrangement which includes a low-pass filter network for passing a.c. signals. A transistor amplifier for amplifying the a.c. signals and for supplying the amplified a.c. signals to a step-up transformer. The transformer includes a controllable tap primary winding for discretely varying the turns-ratio of the transformer in accordance with the frequency of the a.c. signals.
摘要翻译： 一种重要的电子电路装置，其包括用于通过交流的低通滤波器网络。 信号。 用于放大交流电的晶体管放大器。 信号和用于提供放大的直流 信号到升压变压器。 变压器包括可控抽头初级绕组，用于根据交流电源的频率离散地改变变压器的匝数比。 信号。
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公开(公告)号：US3698325A
公开(公告)日：1972-10-17
申请号：US3698325D
申请日：1970-08-26
发明人： GRUNDY REED H
CPC分类号： B60L15/32 , B60L2200/26
摘要： A special signal is transmitted through train line communication channels from a transmitter means on one car to a receiver means on the other car of the self-propelled train unit. The transmission of this signal is controlled by the propulsion control logic means located on one car. The receiver means includes a relay which controls the propulsion condition of one of the cars, normally the trailing car, shifting between direct, multiple unit control from the operator''s position and a preset condition, e.g., propulsion off, as the special signal is or is not received. The special signal may be direct current energy or alternating current energy having a selected frequency characteristic. This latter signal is superimposed on train line channels used for other purposes, e.g., the directional train line wires. The direct current signal, however, requires a separate, dedicated train line channel used in conjunction with the directional train line wires.
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