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公开(公告)号：US3902107A
公开(公告)日：1975-08-26
申请号：US50942274
申请日：1974-09-26
申请人： LORAIN PROD CORP
发明人： BROWN HAROLD J
CPC分类号： H02M7/5236 , H02M7/5155
摘要： The disclosed circuit limits the rate of change of voltage across two series-connected, alternately-conducting switching components. Capacitors are connected across each of two seriesconnected switching components, e.g., thyristors, to limit the rate of change in voltage across each switching component. When both switches are non-conducting, the capacitor which is connected across the last conducting switch is charged at a rate which is less than the critical rate of change of forward offstate voltage for that switch. This prevents the rate of change of voltage across that switch from turning on that switch prematurely. In addition, the capacitor which is connected across the next conducting switch is discharged to establish a relatively low voltage thereacross. This prevents that capacitor from establishing a current which would damage the next conducting switch upon the turn on thereof.
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公开(公告)号：US3859587A
公开(公告)日：1975-01-07
申请号：US43135974
申请日：1974-01-07
申请人： LORAIN PROD CORP
发明人： BROWN HAROLD J
CPC分类号： H02M7/5157
摘要： A circuit for preventing reverse voltage breakdown in the thyristors of center-tapped source inverters. A plurality of clamp diodes are utilized to limit the reverse voltage across inverter thyristors in the presence of the voltage spikes produced by the inductances of the inverter during commutation. The reverse voltage is limited to a value low enough to protect the thyristors from reverse voltage breakdown and yet high enough to assure a relatively short reverse recovery time.
摘要翻译： 用于防止中心抽头逆变器晶闸管反向电压击穿的电路。 在换向期间由逆变器的电感产生的电压尖峰的情况下，多个钳位二极管用于限制反向晶闸管的反向电压。 反向电压被限制到足够低的值，以保护晶闸管免于反向电压击穿，并且足够高以确保相对较短的反向恢复时间。
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3.发明授权Method and apparatus for amplifying signal transmission through transmission lines 失效通过传输线放大信号传输的方法和装置
公开(公告)号：US3818151A
公开(公告)日：1974-06-18
申请号：US32678573
申请日：1973-01-26
申请人： LORAIN PROD CORP
发明人： CHAMBERS C , KIKO F
摘要： A circuit for increasing the amplitude of signals transmitted through a two-wire transmission line. Amplifying voltage generating means generates and introduces in series with the transmission line an amplifying voltage that varies in accordance with the signal voltage across the transmission line. Amplifying current generating means generates and introduces in shunt with the transmission line an amplifying current that varies in accordance with the signal current through the transmission line. Gain control means varies the ratio of amplifying voltage to signal voltage and the ratio of amplifying current to signal current, as a function of frequency, to provide frequency compensated gain and impedance matching for each frequency in the band of frequencies to be transmitted through the transmission line.
摘要翻译： 用于增加通过双线传输线传输的信号幅度的电路。 放大电压发生装置与传输线串联产生并根据传输线上的信号电压而变化的放大电压。 放大电流产生装置根据传输线上的信号电流，在传输线路上产生和分流放大电流。 增益控制装置改变放大电压与信号电压的比率以及放大电流与信号电流的比率作为频率的函数，以提供频率补偿的增益和阻抗匹配，以便通过传输频率的频带中的每个频率 线。
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公开(公告)号：US3763320A
公开(公告)日：1973-10-02
申请号：US3763320D
申请日：1971-10-20
申请人： LORAIN PROD CORP
发明人： CHAMBERS C
IPC分类号： H04M19/00
CPC分类号： H04M19/006
摘要： A circuit for increasing the magnitude of subscriber line current flow in a variety of types of telephone systems. A voltage booster network is connected in series with at least one conductor of a subscriber line. Each voltage booster network includes circuitry for conducting subscriber line current in first and second directions therethrough. D-C boost voltage supply means is connected to each booster network to additively increase the flow of subscriber line current therethrough. Each voltage booster network includes control circuitry which causes that network to exhibit a boost voltage-line current characteristic having a low current region wherein substantially no boost voltage is produced allowing accurate line testing therethrough, a middle current region wherein the boost voltage increases substantially linearly with line current affording pulse adjustment and a high current region wherein the boost voltage remains substantially constant with line current to provide voltage boosting which is stable with respect to variations in line current. Each voltage booster network also includes time-delay circuitry which slows the dynamic response of the circuit of the invention to prevent the latter from increasing the amplitude of the transient currents which accompany telephone system polarity reversals and thereby reduce the probability of premature ring-trip or other undesirable relay operation.
摘要翻译： 一种用于增加各种类型的电话系统中用户线电流的幅度的电路。 升压网络与用户线路的至少一个导体串联连接。 每个升压器网络包括用于在第一和第二方向上进行用户线路电流的电路。 D-C升压电压装置连接到每个增压器网络以增加用户线电流流过其中。 每个升压网络包括控制电路，其使得该网络呈现具有低电流区域的升压电压线电流特性，其中基本上不产生升压电压，允许通过其进行精确的线路测试;中间电流区域，其中升压电压基本上与 提供脉冲调节的线路电流和高电流区域，其中升压电压基本上保持与线电流恒定，以提供相对于线路电流变化稳定的升压。 每个升压器网络还包括时延延迟电路，其减慢本发明的电路的动态响应，以防止后者增加伴随电话系统极性反转的瞬态电流的振幅，从而降低过早跳闸的概率，或者 其他不良继电器操作。
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公开(公告)号：US3763319A
公开(公告)日：1973-10-02
申请号：US3763319D
申请日：1971-02-22
申请人： LORAIN PROD CORP
发明人： CHAMBERS C
IPC分类号： H04M19/00
CPC分类号： H04M19/006
摘要： The invention includes a circuit for additively increasing the d-c operating voltage of long subscriber lines in telephone systems utilizing reverse battery supervision. A plurality of switching circuits are disposed in series with respective conductors of a subscriber line to maintain voltage booster sources in series, power-aiding relationship between a central office battery and a long subscriber line. The circuit of the invention also prevents the voltage booster sources from increasing the voltage which the central office battery applies to the long subscriber line when the long subscriber line is open-circuited at the subscriber station as, for example, during dial pulse interruptions. This assures that the voltage boosting circuitry can increase the level of current flowing through the long subscriber line without impairing the dialing characteristics of that line.
摘要翻译： 本发明包括一种电路，用于通过反向电池监控来增加电话系统中长用户线路的d-c工作电压。 多个开关电路与用户线路的各个导体串联布置，以保持升压电源串联，中心局电池和长用户线路之间的电源辅助关系。 本发明的电路还防止当长用户线路在订户台处开路时，例如在拨号脉冲中断期间，升压电源增加中心局电池对长用户线路施加的电压。 这确保升压电路可以增加流过长用户线路的电流电平，而不会损害该线路的拨号特性。
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公开(公告)号：US3745437A
公开(公告)日：1973-07-10
申请号：US3745437D
申请日：1972-05-18
申请人： LORAIN PROD CORP
发明人： BROWN H
CPC分类号： G05F1/44
摘要： A circuit for providing a regulated a-c or d-c output voltage from an unregulated a-c input voltage. A series regulating network is disposed between the regulator input and the regulator output to support the difference between the unregulated input voltage and the regulated output voltage. A shunt regulating network is connected between the series regulating network and the regulator output to generate a plurality of regulating waves which, together with the input voltage, control the current through and voltage across the series regulating network. Output voltage sensing circuitry controls the phase angle between the input voltage and the regulating waves, as required, to establish and maintain the regulated output voltage.
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公开(公告)号：US3736516A
公开(公告)日：1973-05-29
申请号：US3736516D
申请日：1971-06-14
申请人： LORAIN PROD CORP
发明人： ELLIS C
摘要： A circuit for providing an output pulse train which has a variable frequency when the circuit operates in a first mode and for providing an output pulse train which has a fixed, precise frequency when the circuit operates in a second mode. A fixed frequency pulse generator applies a pulse train having a fixed frequency to one input of a pulse frequency modifying circuit. A variable frequency pulse generator applies a pulse train having a variable frequency to another input of the pulse frequency modifying circuit. When the latter circuit operates in its first mode, the state of the voltage at the circuit output is controlled in accordance with both the fixed and variable frequency input pulse trains and the output pulse train reflects the algebraic sum thereof. When, however, the circuit operates in its second mode, the effect of the variable frequency input pulse train is suppressed and the output frequency is controlled solely in accordance with the frequency of the fixed frequency pulse generator.
摘要翻译： 一种用于提供输出脉冲序列的电路，当电路以第一模式工作时，具有可变频率，并且当电路在第二模式下工作时提供具有固定的精确频率的输出脉冲串。 固定频率脉冲发生器对脉冲频率修正电路的一个输入端施加具有固定频率的脉冲串。 可变频率脉冲发生器将具有可变频率的脉冲串施加到脉冲频率修正电路的另一个输入。 当后一电路在其第一模式下工作时，根据固定频率输入脉冲串和可变频率输入脉冲串来控制电路输出端的电压状态，并且输出脉冲串反映其代数和。 然而，当电路工作在第二模式时，可以抑制可变频率输入脉冲串的影响，并且仅根据固定频率脉冲发生器的频率来控制输出频率。
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公开(公告)号：US3626201A
公开(公告)日：1971-12-07
申请号：US3626201D
申请日：1970-06-05
申请人： LORAIN PROD CORP
IPC分类号： H04M19/00
CPC分类号： H04M19/006 , Y10T307/839
摘要： A circuit for providing a unidirectional DC output voltage from a reversible DC input voltage (for example, talking power in a telephone circuit) and for providing an AC output voltage (for example, ringing power in a telephone circuit) from an AC input voltage. A plurality of diodes are connected in a rectifying configuration between a pair of input terminals and a pair of output terminals when a mode control circuit is in a first operative state in the absence of an AC voltage at the input terminals. A controllable switching network is connected in series with each diode to control the conduction thereof in accordance with the polarity of the voltage at the input terminals. This prevents the uncontrolled conduction of the diodes when the DC voltage at the input terminals is less than the voltage of a DC source which may be connected in series with the output terminals. An AC voltage sensing circuit changes the operative state of the mode control circuit when an AC voltage appears at the input terminals. This change in state causes the mode control circuit to reconnect the diodes in a nonrectifying configuration between the input and output terminals and thereby permit the free flow of an AC current therebetween.
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公开(公告)号：US3621143A
公开(公告)日：1971-11-16
申请号：US3621143D
申请日：1969-04-04
申请人： LORAIN PROD CORP
CPC分类号： H04M19/006
摘要： A voltage booster circuit for telephone systems utilizing reverse battery supervision. First and second switches control the connection of respective auxiliary sources in series between a central office battery and a subscriber circuit. The conduction of said switches are controlled in accordance with the polarity with which the central office battery is connected to the subscriber circuit to connect between the central office battery and the subscriber circuit that auxiliary source which is in power-aiding relationship to the central office battery. The conduction period of one of the switches is made to predominate over the conduction period of the other during dialing and ringing so as to facilitate the transmission of dial pulses and the generation of a DC boost for energizing a trip relay during ringing.
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公开(公告)号：US3576443A
公开(公告)日：1971-04-27
申请号：US3576443D
申请日：1970-05-04
申请人： LORAIN PROD CORP
发明人： BROWN HAROLD J
CPC分类号： H02M1/081 , G05F1/44 , Y10T307/258
摘要： A circuit for providing a regulated square wave output voltage and a regulated DC output voltage or both. An AC source energizes a switching circuit, having a variable switching rate, which connects a capacitor in voltage clamping relationship to an AC load for both half cycles of the AC voltage thereacross. This switching rate is controlled in accordance with the time accumulation of an electrical quantity, in the present instance the voltage across the AC load. The DC voltage across the capacitor attains a predetermined equilibrium value when the frequency of the AC output voltage is equal to the frequency of the AC source. If the DC capacitor voltage and the AC output voltage derived therefrom deviate from their equilibrium values, as, for example, because of a change in the level of load current, there occur transient changes in the switching rate of the switching circuit which result in changes in the phase displacement between the AC input voltage and the AC output voltage. This phase displacement controls the voltage across an inductor which, in turn, controls the flow of a current which restores the DC capacitor voltage and the amplitude and frequency of the AC output voltage to the desired values while supplying the required power to the AC and DC loads.
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