公开(公告)号：US4056687A

公开(公告)日：1977-11-01

申请号：US714592

申请日：1976-08-16

申请人： Robert Dennis Sims

发明人： Robert Dennis Sims

IPC分类号： H04M3/30 ,  H04M19/00 ,  H04M3/22 ,  H04B3/46

CPC分类号： H04M19/006 ,  H04M3/30

摘要： A common control circuit is disclosed for controlling bypassing relays to disconnect telephone line auxiliary circuits from their respective lines preparatory to line testing or for other desired purposes. The control circuit responds to a bypass request signal applied to a line by operating an associated bypassing relay and by activating a timing circuit. The timing circuit and other circuitry cooperate to hold the bypassing relay operated for a time interval sufficient for fulfilling the purpose of the bypass. For serving a bypass request received while another request is being served, the appropriate bypassing relay is operated when the subsequent request is received and the timing circuit is reactivated to insure a sufficient test time for the subsequent request. All operated bypassing relays are held operated until the expiration of a time interval during which no new bypass requests are received.The control circuit includes monitoring circuitry operative to detect selected internal and external failure conditions.

摘要翻译： 公开了一种公共控制电路，用于控制旁路继电器以将电话线路辅助电路与准备线路测试或其它所需目的的各自线路断开连接。 控制电路通过操作相关联的旁路继电器并且通过激活定时电路来响应施加到线路的旁路请求信号。 定时电路和其他电路协作以保持旁路继电器在足以实现旁路目的的时间间隔内操作。 为了在另一个请求被服务时为接收的旁路请求服务，当接收到后续请求并操作定时电路以确保后续请求的足够的测试时间时，操作适当的旁路继电器。 所有操作的旁路继电器保持工作，直到接收到新的旁路请求的时间间隔到期为止。

公开(公告)号：US3906162A

公开(公告)日：1975-09-16

申请号：US49316674

申请日：1974-07-30

申请人： COMMUNIC MFG

发明人： SPARREVOHN FREDERIC R

IPC分类号： H04M19/00 ,  H04B3/36 ,  H04Q1/30

CPC分类号： H04M19/006

摘要： A telephone loop extending circuit for aiding central office battery. Each voltage insertion circuit includes the following: First and second pairs of terminals, first and second voltage sources, first and second transistors having base electrodes and emitter-collector electrode circuits. First sides of the first and second voltage sources, of opposite voltage polarity, are coupled to a first terminal of the corresponding pair. One side of the emitter-collector electrode circuit of each of the transistors is coupled to a second terminal of the corresponding pair. The other sides of the emitter-collector electrode circuits of the first and second transistors are individually coupled to second sides of, respectively, the first and second voltage sources. First and second optical coupling means are provided for the first and second transistors, respectively, each for sensing current flow between terminals of a pair and each being responsive to current flow in one of two opposite directions between terminals for enabling the corresponding transistor to couple the corresponding voltage source to the second terminal of the corresponding pair. A bypass capacitor is coupled from one terminal to the other of the corresponding pair for passing selected signals around the transistors and voltage sources from terminal to terminal. A resistor is coupled from the base electrodes of both transistors to the first sides of the voltage sources and is operative in combination with at least one of the transistors for providing a discharge path for the bypass capacitor after an externally applied signal is removed from terminals of the corresponding pair.

摘要翻译： 用于协助中心局电池的电话回路延长电路。 每个电压插入电路包括：第一和第二对端子，第一和第二电压源，具有基极和发射极 - 集电极电极电路的第一和第二晶体管。 具有相反电压极性的第一和第二电压源的第一侧耦合到相应对的第一端。 每个晶体管的发射极 - 集电极电极的一侧耦合到相应对的第二端。 第一和第二晶体管的发射极 - 集电极电极电路的另一侧分别耦合到第一和第二电压源的第二侧。 分别为第一和第二晶体管提供第一和第二光耦合装置，每个用于感测一对端子之间的电流，并且每一个响应于在端子之间的两个相反方向中的一个中的电流流动，以使相应的晶体管耦合 对应的电压源到相应对的第二端。 旁路电容器从一个端子耦合到相应的对中的另一个，用于将晶体管和电压源周围的选定信号从端子传递到端子。 电阻器从两个晶体管的基极连接到电压源的第一侧，并且与至少一个晶体管组合工作，用于在外部施加的信号从外部施加的信号从 相应的对。

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。

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。

公开(公告)号：US3739099A

公开(公告)日：1973-06-12

申请号：US3739099D

申请日：1970-06-01

申请人： SAN BAR ELECTRONICS CORP

发明人： FITZ SIMONS A ,  MAZAC F

IPC分类号： H04M19/00 ,  H04Q1/36 ,  H04B3/36

CPC分类号： H04M19/006

摘要： A long line adapter circuit employable with telephone lines used to connect a central office to either normally or abnormally distant subscriber facilities is disclosed. The adapter circuit, which may be physically situated at a central office or at a midplacement point between a central office and a subscriber facility, includes a subscriber loop circuit and a central office loop circuit which are inductively coupled through a line coupling transformer to provide audio coupling between the central office lines and the subscriber lines. The subscriber loop circuit includes a pulsing relay circuit which responds to a receiver being placed in an off-hook condition and to dial pulses generated by a subscriber. A high pass filter is employed to attenuate battery noise due to voltage surges created by the operation of the pulsing relay circuit. Also included is a regulator circuit for preventing saturation of the transformer and for providing current limiting when the adapter circuit is used for short subscriber''s lines. The central office loop circuit includes a ringing detector circuit for sensing AC ringing signals transmitted from a central office and a switching circuit which is controlled by an out-pulsing relay circuit. The switching circuit serves to complete or close the central office loop circuit on both outgoing and incoming calls, and to discontinue the application of ringing signals to a subscriber facility on incoming calls.

公开(公告)号：US3671676A

公开(公告)日：1972-06-20

申请号：US3671676D

申请日：1969-12-17

申请人： BELL TELEPHONE LABOR INC

发明人： HENRY JAMES L ,  SCHIMPF LUTHER G

IPC分类号： H04M19/00

CPC分类号： H04M19/006

摘要： This disclosure describes a telephone subscriber loop range extender having a signaling mode and a transmission mode. In the former, a resistive shunt is applied across the loop with each dial pulse to aid operation of the pulsing relay for an originating cell. For a terminating call, the shunt is applied upon answer, either during ringing or during the silent interval, to aid operation of the ring-trip relay. In the transmission mode, voice frequency gain and greater transmitter voltage are applied to the loop. A control circuit consisting of logic, timing and relay driving circuits, acts upon loop voltage and current data to control shunt action and mode selection.

摘要翻译： 本公开描述了具有信令模式和传输模式的电话用户环路扩展器。 在前者中，每个拨号脉冲在环路上施加电阻分流器，以帮助起始电池的脉冲继电器的操作。 对于终止呼叫，在应答时应用分路，无论是在振铃期间还是在静音间隔期间，都可以应用分流来帮助环路继电器的操作。 在传输模式下，语音频率增益和更大的发射机电压被施加到环路。 由逻辑，定时和继电器驱动电路组成的控制电路作用于环路电压和电流数据，以控制分流动作和模式选择。

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

发明人： CHAMBERS CHARLES W JR

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.

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

发明人： CHAMBERS CHARLES WILLIAM JR

IPC分类号： H04M19/00 ,  H04N7/04

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.

公开(公告)号：US3527894A

公开(公告)日：1970-09-08

申请号：US3527894D

申请日：1967-06-29

申请人： LORAIN PROD CORP

发明人： MESENHIMER LEE O ,  KAMMILLER NEIL A

IPC分类号： H04M19/00 ,  H04B3/00

CPC分类号： H04M19/006 ,  Y10T307/839

公开(公告)号：US20050147233A1

公开(公告)日：2005-07-07

申请号：US10750414

申请日：2003-12-31

申请人： Michael Mills

发明人： Michael Mills

IPC分类号： H04M1/00 ,  H04M3/00 ,  H04M19/00

CPC分类号： H04M19/006 ,  H04M3/005

摘要： A variable power supply is controlled to supply power to an electronic device at different supply levels. One or more power supply controller parameters are dynamically controlled.

摘要翻译： 控制可变电源以在不同的电源级别向电子设备供电。 一个或多个电源控制器参数被动态控制。